[33053] | 1 | /**
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| 2 | *############################################################################
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| 3 | * A component of the Greenstone Librarian Interface, part of the Greenstone
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| 4 | * digital library suite from the New Zealand Digital Library Project at the
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| 5 | * University of Waikato, New Zealand.
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| 6 | *
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| 7 | * Author: Michael Dewsnip, NZDL Project, University of Waikato, NZ
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| 8 | *
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| 9 | * Copyright (C) 2004 New Zealand Digital Library Project
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| 10 | *
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| 11 | * This program is free software; you can redistribute it and/or modify
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| 12 | * it under the terms of the GNU General Public License as published by
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| 13 | * the Free Software Foundation; either version 2 of the License, or
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| 14 | * (at your option) any later version.
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| 15 | *
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| 16 | * This program is distributed in the hope that it will be useful,
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| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 19 | * GNU General Public License for more details.
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| 20 | *
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| 21 | * You should have received a copy of the GNU General Public License
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| 22 | * along with this program; if not, write to the Free Software
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| 23 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 24 | *############################################################################
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| 25 | */
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| 26 |
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| 27 | package org.greenstone.gatherer.metadata;
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| 28 |
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| 29 |
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| 30 | import java.io.*;
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| 31 | import java.util.*;
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| 32 | import org.greenstone.gatherer.DebugStream;
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| 33 | import org.greenstone.gatherer.collection.CollectionTreeNode;
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| 34 | import org.greenstone.gatherer.util.XMLTools;
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| 35 | import org.w3c.dom.*;
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| 36 |
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| 37 |
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| 38 | /** This class represents one metadata.xml file */
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| 39 | public class MetadataXMLFile
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| 40 | extends File
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| 41 | {
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| 42 | static final private String DESCRIPTION_ELEMENT = "Description";
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| 43 | static final private String DIRECTORY_FILENAME = ".*";
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| 44 | static final private String FILENAME_ELEMENT = "FileName";
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| 45 | static final private String FILESET_ELEMENT = "FileSet";
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| 46 | static final private String METADATA_ELEMENT = "Metadata";
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| 47 | static final private String[] nonEscapingElements = new String[]{FILENAME_ELEMENT};
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| 48 |
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| 49 | /** Special metadata field: the filename encoding is a unique sort of metadata in
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| 50 | * that it is not just information stored with a collection file, but also needs to
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| 51 | * be applied in real-time to the collection file (to its filename) for display. */
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| 52 | static final public String FILENAME_ENCODING_METADATA = "gs.filenameEncoding";
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| 53 |
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| 54 | // To speed things up a bit we keep the last accessed metadata.xml file in memory
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| 55 | static private File loaded_file = null;
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| 56 | static private Document loaded_file_document = null;
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| 57 | static private boolean loaded_file_changed = false;
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| 58 |
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| 59 |
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| 60 | public MetadataXMLFile(String metadata_xml_file_path)
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| 61 | {
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| 62 | super(metadata_xml_file_path);
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| 63 | }
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| 64 |
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| 65 |
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| 66 | public void addMetadata(CollectionTreeNode file_node, ArrayList metadata_values)
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| 67 | {
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| 68 | // If this metadata.xml file isn't the one currently loaded, load it now
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| 69 | if (loaded_file != this) {
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| 70 | // First we must save out the currently loaded file
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| 71 | saveLoadedFile();
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| 72 |
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| 73 | // Parse the metadata.xml file
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| 74 | Document document = XMLTools.parseXMLFile(this);
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| 75 | if (document == null) {
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| 76 | System.err.println("Error: Could not parse metadata.xml file " + getAbsolutePath());
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| 77 | return;
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| 78 | }
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| 79 |
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| 80 | loaded_file = this;
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| 81 | loaded_file_document = document;
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| 82 | }
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| 83 |
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| 84 | // Determine the file's path relative to the location of the metadata.xml file
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| 85 | String metadata_xml_file_directory_path = FilenameEncoding.fileToURLEncoding(getParentFile());
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| 86 | String file_relative_path = file_node.getURLEncodedFilePath().substring(metadata_xml_file_directory_path.length());
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| 87 | if (file_relative_path.startsWith(FilenameEncoding.URL_FILE_SEPARATOR)) {
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| 88 | file_relative_path = file_relative_path.substring(FilenameEncoding.URL_FILE_SEPARATOR.length());
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| 89 | }
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| 90 |
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| 91 | // Form a regular expression that specifies the scope of the metadata
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| 92 | String file_path_regexp;
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| 93 | if (file_relative_path.equals("")) {
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| 94 | // Special case for matching all files in the directory
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| 95 | file_path_regexp = DIRECTORY_FILENAME;
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| 96 | }
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| 97 | else {
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| 98 | // Convert the file path into a regular expression that will match it
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| 99 | file_path_regexp = MetadataTools.getRegularExpressionThatMatchesFilePath(file_relative_path);
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| 100 | }
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| 101 |
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| 102 | // Find the appropriate FileSet element for this file
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| 103 | Element appropriate_fileset_element = null;
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| 104 |
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| 105 | // Read all the FileSet elements in the file
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| 106 | NodeList fileset_elements_nodelist = loaded_file_document.getElementsByTagName(FILESET_ELEMENT);
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| 107 | for (int i = 0; i < fileset_elements_nodelist.getLength(); i++) {
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| 108 | Element current_fileset_element = (Element) fileset_elements_nodelist.item(i);
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| 109 |
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| 110 | // Check the FileName elements of the FileSet to see if we have a match
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| 111 | NodeList filename_elements_nodelist = current_fileset_element.getElementsByTagName(FILENAME_ELEMENT);
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| 112 | for (int j = 0; j < filename_elements_nodelist.getLength(); j++) {
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| 113 | Element current_filename_element = (Element) filename_elements_nodelist.item(j);
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| 114 | String current_filename_element_value = XMLTools.getElementTextValue(current_filename_element);
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| 115 |
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| 116 | // Only exact matches can be extended with new metadata
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| 117 | if (current_filename_element_value.equals(file_path_regexp)) {
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| 118 | appropriate_fileset_element = current_fileset_element;
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| 119 | break;
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| 120 | }
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| 121 | }
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| 122 | }
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| 123 |
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| 124 | // If no appropriate FileSet element exists create a new one for this file
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| 125 | if (appropriate_fileset_element == null) {
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| 126 | DebugStream.println("Creating new FileSet element for file since none exists..."+file_path_regexp);
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| 127 | appropriate_fileset_element = loaded_file_document.createElement(FILESET_ELEMENT);
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| 128 |
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| 129 | Element new_filename_element = loaded_file_document.createElement(FILENAME_ELEMENT);
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| 130 | new_filename_element.appendChild(loaded_file_document.createTextNode(file_path_regexp));
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| 131 | appropriate_fileset_element.appendChild(new_filename_element);
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| 132 |
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| 133 | Element new_description_element = loaded_file_document.createElement(DESCRIPTION_ELEMENT);
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| 134 | appropriate_fileset_element.appendChild(new_description_element);
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| 135 |
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| 136 | // add the fileset element for .* at the top: especially important for
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| 137 | // non-accumulating (and override mode) meta. Other type fileset elements can be appended
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| 138 | if(file_path_regexp.equals(DIRECTORY_FILENAME)) {
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| 139 | loaded_file_document.getDocumentElement().insertBefore(appropriate_fileset_element,
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| 140 | loaded_file_document.getDocumentElement().getFirstChild());
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| 141 | } else {
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| 142 | loaded_file_document.getDocumentElement().appendChild(appropriate_fileset_element);
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| 143 | }
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| 144 | }
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| 145 |
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| 146 | // Add each of the metadata values to the FileSet's Description element
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| 147 | Element description_element = (Element) appropriate_fileset_element.getElementsByTagName(DESCRIPTION_ELEMENT).item(0);
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| 148 | for (int i = 0; i < metadata_values.size(); i++) {
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| 149 | MetadataValue metadata_value = (MetadataValue) metadata_values.get(i);
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| 150 | String metadata_element_name_full = metadata_value.getMetadataElement().getFullName();
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| 151 |
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| 152 | // Remove any characters that are invalid in XML
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| 153 | String metadata_value_string = XMLTools.removeInvalidCharacters(metadata_value.getFullValue());
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| 154 |
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| 155 | // Square brackets need to be escaped because they are a special character in Greenstone
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| 156 | metadata_value_string = metadata_value_string.replaceAll("\\[", "[");
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| 157 | metadata_value_string = metadata_value_string.replaceAll("\\]", "]");
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| 158 |
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| 159 | // the gs.filenameEncoding metadata is unique in that, when added, removed or
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| 160 | // changed, it must be applied on the file(name) whose metadata has been adjusted
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| 161 | if(metadata_element_name_full.equals(FILENAME_ENCODING_METADATA)) {
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| 162 | metadata_value_string = processFilenameEncoding(file_path_regexp,
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| 163 | file_node, metadata_value_string, false);
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| 164 | // true only if removing meta
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| 165 | }
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| 166 |
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| 167 | // Check if this piece of metadata has already been assigned to this FileSet element
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| 168 | boolean metadata_already_assigned = false;
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| 169 | NodeList metadata_elements_nodelist = description_element.getElementsByTagName(METADATA_ELEMENT);
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| 170 | for (int k = 0; k < metadata_elements_nodelist.getLength(); k++) {
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| 171 | Element current_metadata_element = (Element) metadata_elements_nodelist.item(k);
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| 172 |
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| 173 | // Check if the metadata element name matches
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| 174 | String current_metadata_element_name_full = current_metadata_element.getAttribute("name");
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| 175 | if (current_metadata_element_name_full.equals(metadata_element_name_full)) {
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| 176 | // if the metadata must not accumulate, then edit the current value
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| 177 | if (!metadata_value.isAccumulatingMetadata()) {
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| 178 | XMLTools.setNodeText(current_metadata_element, metadata_value_string);
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| 179 | metadata_already_assigned = true;
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| 180 | break;
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| 181 | }
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| 182 | // Check if the metadata element value matches
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| 183 | String current_metadata_value_string = XMLTools.getElementTextValue(current_metadata_element);
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| 184 | if (current_metadata_value_string.equals(metadata_value_string)) {
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| 185 | // Metadata already assigned
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| 186 | metadata_already_assigned = true;
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| 187 | break;
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| 188 | }
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| 189 | }
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| 190 | }
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| 191 |
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| 192 | // If the piece of metadata hasn't already been assigned, add it now
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| 193 | if (!metadata_already_assigned) {
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| 194 | // Create a new Metadata element to record this metadata
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| 195 | Element new_metadata_element = loaded_file_document.createElement(METADATA_ELEMENT);
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| 196 | new_metadata_element.setAttribute("name", metadata_value.getMetadataElement().getFullName());
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| 197 | new_metadata_element.setAttribute("mode", (metadata_value.isAccumulatingMetadata() ? "accumulate" : "override"));
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| 198 | new_metadata_element.appendChild(loaded_file_document.createTextNode(metadata_value_string));
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| 199 |
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| 200 | // Accumulating metadata: add at the end
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| 201 | if (metadata_value.isAccumulatingMetadata()) {
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| 202 | description_element.appendChild(new_metadata_element);
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| 203 | }
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| 204 | // Override metadata: add at the start (so it overrides inherited metadata without affecting other assigned metadata)
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| 205 | else {
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| 206 | description_element.insertBefore(new_metadata_element, description_element.getFirstChild());
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| 207 | }
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| 208 | }
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| 209 | }
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| 210 |
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| 211 | // Remember that we've changed the file so it gets saved when a new one is loaded
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| 212 | loaded_file_changed = true;
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| 213 | }
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| 214 |
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| 215 |
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| 216 | public ArrayList getMetadataAssignedToFile(File file, boolean fileEncodingOnly)
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| 217 | {
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| 218 | // If this metadata.xml file isn't the one currently loaded, load it now
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| 219 | if (loaded_file != this) {
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| 220 | // First we must save out the currently loaded file
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| 221 | saveLoadedFile();
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| 222 |
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| 223 | // Parse the metadata.xml file
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| 224 | Document document = XMLTools.parseXMLFile(this);
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| 225 | if (document == null) {
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| 226 | System.err.println("Error: Could not parse metadata.xml file " + getAbsolutePath());
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| 227 | return new ArrayList();
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| 228 | }
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| 229 |
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| 230 | loaded_file = this;
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| 231 | loaded_file_document = document;
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| 232 | }
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| 233 |
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| 234 | // Determine the file's path relative to the location of the metadata.xml file
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| 235 | String file_relative_path = FilenameEncoding.fileToURLEncoding(file);
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| 236 | File metadata_xml_file_directory = getParentFile();
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| 237 | String metadata_xml_file_directory_path = FilenameEncoding.fileToURLEncoding(metadata_xml_file_directory);
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| 238 | file_relative_path = file_relative_path.substring(metadata_xml_file_directory_path.length());
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| 239 |
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| 240 | if (file_relative_path.startsWith(FilenameEncoding.URL_FILE_SEPARATOR)) {
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| 241 | file_relative_path = file_relative_path.substring(FilenameEncoding.URL_FILE_SEPARATOR.length());
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| 242 | }
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| 243 |
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| 244 | // Build up a list of metadata assigned to this file
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| 245 | ArrayList metadata_values = new ArrayList();
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| 246 |
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| 247 | // Read all the FileSet elements in the file
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| 248 | NodeList fileset_elements_nodelist = loaded_file_document.getElementsByTagName(FILESET_ELEMENT);
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| 249 | for (int i = 0; i < fileset_elements_nodelist.getLength(); i++) {
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| 250 | Element current_fileset_element = (Element) fileset_elements_nodelist.item(i);
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| 251 | boolean current_fileset_matches = false;
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| 252 | boolean is_one_file_only_metadata = true;
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| 253 | File folder_metadata_inherited_from = null;
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| 254 |
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| 255 | // Check the FileName elements of the FileSet to see if we have a match
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| 256 | NodeList filename_elements_nodelist = current_fileset_element.getElementsByTagName(FILENAME_ELEMENT);
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| 257 | for (int j = 0; j < filename_elements_nodelist.getLength(); j++) {
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| 258 | Element current_filename_element = (Element) filename_elements_nodelist.item(j);
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| 259 | String current_filename_element_value = XMLTools.getElementTextValue(current_filename_element);
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| 260 |
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| 261 | // Does this fileset specify metadata for one file only?
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| 262 | is_one_file_only_metadata = true;
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| 263 | if (current_filename_element_value.indexOf("*") != -1 && !current_filename_element_value.equals(DIRECTORY_FILENAME)) {
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| 264 | // No, it specifies metadata for multiple files (but not all the files in the directory)
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| 265 | is_one_file_only_metadata = false;
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| 266 | }
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| 267 |
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| 268 | // This fileset specifies metadata for the file
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| 269 | if (file_relative_path.matches(current_filename_element_value)) {
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| 270 | current_fileset_matches = true;
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| 271 | if (!file_relative_path.equals("") && current_filename_element_value.equals(DIRECTORY_FILENAME)) {
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| 272 | folder_metadata_inherited_from = metadata_xml_file_directory;
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| 273 | }
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| 274 | break;
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| 275 | }
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| 276 |
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| 277 | // This fileset specifies metadata for the folder the file is in
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| 278 | if (file_relative_path.startsWith(current_filename_element_value + FilenameEncoding.URL_FILE_SEPARATOR)) {
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| 279 | current_fileset_matches = true;
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| 280 | folder_metadata_inherited_from = new File(metadata_xml_file_directory, current_filename_element_value);
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| 281 | break;
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| 282 | }
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| 283 | }
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| 284 |
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| 285 | // The FileSet doesn't apply, so move onto the next one
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| 286 | if (current_fileset_matches == false) {
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| 287 | continue;
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| 288 | }
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| 289 |
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| 290 | // Read all the Metadata elements in the fileset
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| 291 | NodeList metadata_elements_nodelist = current_fileset_element.getElementsByTagName(METADATA_ELEMENT);
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| 292 | for (int k = 0; k < metadata_elements_nodelist.getLength(); k++) {
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| 293 | Element current_metadata_element = (Element) metadata_elements_nodelist.item(k);
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| 294 | String metadata_element_name_full = current_metadata_element.getAttribute("name");
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| 295 | // if we're only looking for fileEncoding metadata and this isn't it, skip to the next
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| 296 | if(fileEncodingOnly && !metadata_element_name_full.equals(FILENAME_ENCODING_METADATA)) {
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| 297 | continue;
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| 298 | }
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| 299 | String metadata_set_namespace = MetadataTools.getMetadataSetNamespace(metadata_element_name_full);
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| 300 |
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| 301 | // Ignore legacy crap
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| 302 | if (metadata_set_namespace.equals("hidden")) {
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| 303 | continue;
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| 304 | }
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| 305 |
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| 306 | MetadataSet metadata_set = MetadataSetManager.getMetadataSet(metadata_set_namespace);
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| 307 | if (metadata_set == null) {
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| 308 | // The metadata set isn't loaded, so give the option of mapping the element into a loaded set
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| 309 | String target_metadata_element_name_full = MetadataSetManager.mapUnloadedMetadataElement(metadata_element_name_full);
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| 310 | if (target_metadata_element_name_full == null || target_metadata_element_name_full.equals("")) {
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| 311 | // Skip this element if we still don't have a loaded element for it
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| 312 | continue;
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| 313 | }
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| 314 |
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| 315 | metadata_element_name_full = target_metadata_element_name_full;
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| 316 | metadata_set_namespace = MetadataTools.getMetadataSetNamespace(metadata_element_name_full);
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| 317 | metadata_set = MetadataSetManager.getMetadataSet(metadata_set_namespace);
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| 318 | }
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| 319 |
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| 320 | MetadataElement metadata_element = MetadataTools.getMetadataElementWithName(metadata_element_name_full);
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| 321 |
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| 322 | String metadata_element_name = MetadataTools.getMetadataElementName(metadata_element_name_full);
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| 323 | // If the element doesn't exist in the metadata set, we're not interested
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| 324 | //Shaoqun modified. It needs to be added to metadata_set because the user might disable skim file
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| 325 | if (metadata_element == null) {
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| 326 | metadata_element = metadata_set.addMetadataElementForThisSession(metadata_element_name);
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| 327 | // continue;
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| 328 | }
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| 329 |
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| 330 | // Square brackets need to be escaped because they are a special character in Greenstone
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| 331 | String metadata_value_string = XMLTools.getElementTextValue(current_metadata_element);
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| 332 | metadata_value_string = metadata_value_string.replaceAll("[", "[");
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| 333 | metadata_value_string = metadata_value_string.replaceAll("]", "]");
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| 334 |
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| 335 | MetadataValueTreeNode metadata_value_tree_node = metadata_element.getMetadataValueTreeNode(metadata_value_string);
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| 336 |
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| 337 | // If there is no metadata value tree node for this value, create it
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| 338 | if (metadata_value_tree_node == null) {
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| 339 | DebugStream.println("Note: No value tree node for metadata value \"" + metadata_value_string + "\"");
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| 340 | metadata_element.addMetadataValue(metadata_value_string);
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| 341 | metadata_value_tree_node = metadata_element.getMetadataValueTreeNode(metadata_value_string);
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| 342 | }
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| 343 |
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| 344 | MetadataValue metadata_value = new MetadataValue(metadata_element, metadata_value_tree_node);
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| 345 | metadata_value.inheritsMetadataFromFolder(folder_metadata_inherited_from);
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| 346 | metadata_value.setIsOneFileOnlyMetadata(is_one_file_only_metadata);
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| 347 |
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| 348 | // Is this accumulating metadata?
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| 349 | if (current_metadata_element.getAttribute("mode").equals("accumulate")) {
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| 350 | metadata_value.setIsAccumulatingMetadata(true);
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| 351 | }
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| 352 |
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| 353 | // Add the new metadata value to the list
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| 354 | metadata_values.add(metadata_value);
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| 355 | }
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| 356 | }
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| 357 |
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| 358 | return metadata_values;
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| 359 | }
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| 360 |
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| 361 |
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| 362 | public void removeMetadata(CollectionTreeNode file_node, ArrayList metadata_values)
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| 363 | {
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| 364 | // If this metadata.xml file isn't the one currently loaded, load it now
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| 365 | if (loaded_file != this) {
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| 366 | // First we must save out the currently loaded file
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| 367 | saveLoadedFile();
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| 368 |
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| 369 | // Parse the metadata.xml file
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| 370 | Document document = XMLTools.parseXMLFile(this);
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| 371 | if (document == null) {
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| 372 | System.err.println("Error: Could not parse metadata.xml file " + getAbsolutePath());
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| 373 | return;
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| 374 | }
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| 375 |
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| 376 | loaded_file = this;
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| 377 | loaded_file_document = document;
|
---|
| 378 | }
|
---|
| 379 |
|
---|
| 380 | // Determine the file's path relative to the location of the metadata.xml file
|
---|
| 381 | String metadata_xml_file_directory_path = FilenameEncoding.fileToURLEncoding(getParentFile());
|
---|
| 382 | String file_relative_path = file_node.getURLEncodedFilePath().substring(metadata_xml_file_directory_path.length());
|
---|
| 383 | if (file_relative_path.startsWith(FilenameEncoding.URL_FILE_SEPARATOR)) {
|
---|
| 384 | file_relative_path = file_relative_path.substring(FilenameEncoding.URL_FILE_SEPARATOR.length());
|
---|
| 385 | }
|
---|
| 386 |
|
---|
| 387 | // Form a regular expression that specifies the scope of the metadata
|
---|
| 388 | String file_path_regexp;
|
---|
| 389 | if (file_relative_path.equals("")) {
|
---|
| 390 | // Special case for matching all files in the directory
|
---|
| 391 | file_path_regexp = DIRECTORY_FILENAME;
|
---|
| 392 | }
|
---|
| 393 | else {
|
---|
| 394 | // Convert the file path into a regular expression that will match it
|
---|
| 395 | file_path_regexp = MetadataTools.getRegularExpressionThatMatchesFilePath(file_relative_path);
|
---|
| 396 | }
|
---|
| 397 |
|
---|
| 398 | // Find the appropriate FileSet element for this file
|
---|
| 399 | Element appropriate_fileset_element = null;
|
---|
| 400 |
|
---|
| 401 | // Read all the FileSet elements in the file
|
---|
| 402 | NodeList fileset_elements_nodelist = loaded_file_document.getElementsByTagName(FILESET_ELEMENT);
|
---|
| 403 | for (int i = 0; i < fileset_elements_nodelist.getLength(); i++) {
|
---|
| 404 | Element current_fileset_element = (Element) fileset_elements_nodelist.item(i);
|
---|
| 405 |
|
---|
| 406 | // Check the FileName elements of the FileSet to see if we have a match
|
---|
| 407 | NodeList filename_elements_nodelist = current_fileset_element.getElementsByTagName(FILENAME_ELEMENT);
|
---|
| 408 | for (int j = 0; j < filename_elements_nodelist.getLength(); j++) {
|
---|
| 409 | Element current_filename_element = (Element) filename_elements_nodelist.item(j);
|
---|
| 410 | String current_filename_element_value = XMLTools.getElementTextValue(current_filename_element);
|
---|
| 411 |
|
---|
| 412 | // Only exact matches can be extended with new metadata
|
---|
| 413 | if (current_filename_element_value.equals(file_path_regexp)) {
|
---|
| 414 | appropriate_fileset_element = current_fileset_element;
|
---|
| 415 | break;
|
---|
| 416 | }
|
---|
| 417 | }
|
---|
| 418 | }
|
---|
| 419 |
|
---|
| 420 | // If no appropriate FileSet element exists the metadata isn't assigned in this metadata.xml file
|
---|
| 421 | if (appropriate_fileset_element == null) {
|
---|
| 422 | DebugStream.println("Note: No appropriate FileSet element found when removing metadata from " + this);
|
---|
| 423 | return;
|
---|
| 424 | }
|
---|
| 425 |
|
---|
| 426 | // Remove each of the metadata values from the FileSet's Description element
|
---|
| 427 | for (int i = 0; i < metadata_values.size(); i++) {
|
---|
| 428 | MetadataValue metadata_value = (MetadataValue) metadata_values.get(i);
|
---|
| 429 |
|
---|
| 430 | // Remove any characters that are invalid in XML
|
---|
| 431 | String metadata_value_string = XMLTools.removeInvalidCharacters(metadata_value.getFullValue());
|
---|
| 432 |
|
---|
| 433 | // Square brackets need to be escaped because they are a special character in Greenstone
|
---|
| 434 | metadata_value_string = metadata_value_string.replaceAll("\\[", "[");
|
---|
| 435 | metadata_value_string = metadata_value_string.replaceAll("\\]", "]");
|
---|
| 436 |
|
---|
| 437 | // Find the Metadata element to delete from the fileset
|
---|
| 438 | String metadata_element_name_full = metadata_value.getMetadataElement().getFullName();
|
---|
| 439 | NodeList metadata_elements_nodelist = appropriate_fileset_element.getElementsByTagName(METADATA_ELEMENT);
|
---|
| 440 | for (int k = 0; k < metadata_elements_nodelist.getLength(); k++) {
|
---|
| 441 | Element current_metadata_element = (Element) metadata_elements_nodelist.item(k);
|
---|
| 442 |
|
---|
| 443 | // Check the metadata element name matches
|
---|
| 444 | String current_metadata_element_name_full = current_metadata_element.getAttribute("name");
|
---|
| 445 | if (current_metadata_element_name_full.equals(metadata_element_name_full)) {
|
---|
| 446 | // Check the metadata element value matches
|
---|
| 447 | String current_metadata_value_string = XMLTools.getElementTextValue(current_metadata_element);
|
---|
| 448 | if (current_metadata_value_string.equals(metadata_value_string)) {
|
---|
| 449 |
|
---|
| 450 | // Remove this Metadata element
|
---|
| 451 | current_metadata_element.getParentNode().removeChild(current_metadata_element);
|
---|
| 452 |
|
---|
| 453 | // the gs.filenameEncoding metadata is unique in that, when added, removed or
|
---|
| 454 | // changed, it must be applied on the file(name) whose metadata has been adjusted
|
---|
| 455 | if(current_metadata_element_name_full.equals(FILENAME_ENCODING_METADATA)) {
|
---|
| 456 |
|
---|
| 457 | // metadata_value_string will hereafter be the inherited gs.FilenameEncoding
|
---|
| 458 | // metadata (if any), now that the value at this level has been removed
|
---|
| 459 | metadata_value_string = processFilenameEncoding(file_path_regexp,
|
---|
| 460 | file_node, "", true); // true only if *removing* this meta
|
---|
| 461 | }
|
---|
| 462 |
|
---|
| 463 | // If there are no Metadata elements left now, remove the (empty) FileSet element
|
---|
| 464 | if (metadata_elements_nodelist.getLength() == 0) {
|
---|
| 465 | appropriate_fileset_element.getParentNode().removeChild(appropriate_fileset_element);
|
---|
| 466 | }
|
---|
| 467 |
|
---|
| 468 | break;
|
---|
| 469 | }
|
---|
| 470 | }
|
---|
| 471 | }
|
---|
| 472 | }
|
---|
| 473 |
|
---|
| 474 | // Remember that we've changed the file so it gets saved when a new one is loaded
|
---|
| 475 | loaded_file_changed = true;
|
---|
| 476 | }
|
---|
| 477 |
|
---|
| 478 |
|
---|
| 479 | public void replaceMetadata(CollectionTreeNode file_node, MetadataValue old_metadata_value, MetadataValue new_metadata_value)
|
---|
| 480 | {
|
---|
| 481 | // If this metadata.xml file isn't the one currently loaded, load it now
|
---|
| 482 | if (loaded_file != this) {
|
---|
| 483 | // First we must save out the currently loaded file
|
---|
| 484 | saveLoadedFile();
|
---|
| 485 |
|
---|
| 486 | // Parse the metadata.xml file
|
---|
| 487 | Document document = XMLTools.parseXMLFile(this);
|
---|
| 488 | if (document == null) {
|
---|
| 489 | System.err.println("Error: Could not parse metadata.xml file " + getAbsolutePath());
|
---|
| 490 | return;
|
---|
| 491 | }
|
---|
| 492 |
|
---|
| 493 | loaded_file = this;
|
---|
| 494 | loaded_file_document = document;
|
---|
| 495 | }
|
---|
| 496 |
|
---|
| 497 | // Determine the file's path relative to the location of the metadata.xml file
|
---|
| 498 | String metadata_xml_file_directory_path = FilenameEncoding.fileToURLEncoding(getParentFile());
|
---|
| 499 | String file_relative_path = file_node.getURLEncodedFilePath().substring(metadata_xml_file_directory_path.length());
|
---|
| 500 | if (file_relative_path.startsWith(FilenameEncoding.URL_FILE_SEPARATOR)) {
|
---|
| 501 | file_relative_path = file_relative_path.substring(FilenameEncoding.URL_FILE_SEPARATOR.length());
|
---|
| 502 | }
|
---|
| 503 |
|
---|
| 504 | // Form a regular expression that specifies the scope of the metadata
|
---|
| 505 | String file_path_regexp;
|
---|
| 506 | if (file_relative_path.equals("")) {
|
---|
| 507 | // Special case for matching all files in the directory
|
---|
| 508 | file_path_regexp = DIRECTORY_FILENAME;
|
---|
| 509 | }
|
---|
| 510 | else {
|
---|
| 511 | // Convert the file path into a regular expression that will match it
|
---|
| 512 | file_path_regexp = MetadataTools.getRegularExpressionThatMatchesFilePath(file_relative_path);
|
---|
| 513 | }
|
---|
| 514 |
|
---|
| 515 | // Remove any characters that are invalid in XML
|
---|
| 516 | String old_metadata_value_string = XMLTools.removeInvalidCharacters(old_metadata_value.getFullValue());
|
---|
| 517 | String new_metadata_value_string = XMLTools.removeInvalidCharacters(new_metadata_value.getFullValue());
|
---|
| 518 |
|
---|
| 519 | // Square brackets need to be escaped because they are a special character in Greenstone
|
---|
| 520 | old_metadata_value_string = old_metadata_value_string.replaceAll("\\[", "[");
|
---|
| 521 | old_metadata_value_string = old_metadata_value_string.replaceAll("\\]", "]");
|
---|
| 522 | new_metadata_value_string = new_metadata_value_string.replaceAll("\\[", "[");
|
---|
| 523 | new_metadata_value_string = new_metadata_value_string.replaceAll("\\]", "]");
|
---|
| 524 |
|
---|
| 525 | // Read all the FileSet elements in the file
|
---|
| 526 | NodeList fileset_elements_nodelist = loaded_file_document.getElementsByTagName(FILESET_ELEMENT);
|
---|
| 527 | for (int i = 0; i < fileset_elements_nodelist.getLength(); i++) {
|
---|
| 528 | Element current_fileset_element = (Element) fileset_elements_nodelist.item(i);
|
---|
| 529 | boolean current_fileset_matches = false;
|
---|
| 530 |
|
---|
| 531 | // Check the FileName elements of the FileSet to see if we have a match
|
---|
| 532 | NodeList filename_elements_nodelist = current_fileset_element.getElementsByTagName(FILENAME_ELEMENT);
|
---|
| 533 | for (int j = 0; j < filename_elements_nodelist.getLength(); j++) {
|
---|
| 534 | Element current_filename_element = (Element) filename_elements_nodelist.item(j);
|
---|
| 535 | String current_filename_element_value = XMLTools.getElementTextValue(current_filename_element);
|
---|
| 536 |
|
---|
| 537 | // Only exact matches can be edited
|
---|
| 538 | if (current_filename_element_value.equals(file_path_regexp)) {
|
---|
| 539 | current_fileset_matches = true;
|
---|
| 540 | break;
|
---|
| 541 | }
|
---|
| 542 | }
|
---|
| 543 |
|
---|
| 544 | // The FileSet doesn't apply, so move onto the next one
|
---|
| 545 | if (current_fileset_matches == false) {
|
---|
| 546 | continue;
|
---|
| 547 | }
|
---|
| 548 |
|
---|
| 549 | // Each metadata value is only allowed to be assigned once
|
---|
| 550 | boolean new_metadata_value_already_exists = false;
|
---|
| 551 | Element metadata_element_to_edit = null;
|
---|
| 552 |
|
---|
| 553 | // Find the Metadata element to replace in the fileset
|
---|
| 554 | String metadata_element_name_full = old_metadata_value.getMetadataElement().getFullName();
|
---|
| 555 | NodeList metadata_elements_nodelist = current_fileset_element.getElementsByTagName(METADATA_ELEMENT);
|
---|
| 556 | for (int k = 0; k < metadata_elements_nodelist.getLength(); k++) {
|
---|
| 557 | Element current_metadata_element = (Element) metadata_elements_nodelist.item(k);
|
---|
| 558 |
|
---|
| 559 | // Check the metadata element name matches
|
---|
| 560 | String current_metadata_element_name_full = current_metadata_element.getAttribute("name");
|
---|
| 561 | if (!current_metadata_element_name_full.equals(metadata_element_name_full)) {
|
---|
| 562 | continue;
|
---|
| 563 | }
|
---|
| 564 |
|
---|
| 565 | // Check the new metadata value doesn't already exist
|
---|
| 566 | String current_metadata_value_string = XMLTools.getElementTextValue(current_metadata_element);
|
---|
| 567 | if (current_metadata_value_string.equals(new_metadata_value_string)) {
|
---|
| 568 | new_metadata_value_already_exists = true;
|
---|
| 569 | }
|
---|
| 570 |
|
---|
| 571 | // Check the metadata element value matches
|
---|
| 572 | if (current_metadata_value_string.equals(old_metadata_value_string)) {
|
---|
| 573 | metadata_element_to_edit = current_metadata_element;
|
---|
| 574 | }
|
---|
| 575 | }
|
---|
| 576 |
|
---|
| 577 | // If the new metadata value already existed, remove the original value
|
---|
| 578 | if (new_metadata_value_already_exists) {
|
---|
| 579 | if(metadata_element_to_edit != null) { //?????????
|
---|
| 580 | metadata_element_to_edit.getParentNode().removeChild(metadata_element_to_edit);
|
---|
| 581 | } else {
|
---|
| 582 | System.err.println("ERROR MetadataXMLFile: metadata_element_to_edit is null");
|
---|
| 583 | }
|
---|
| 584 | }
|
---|
| 585 | // Otherwise replace the old value with the new value
|
---|
| 586 | // Ensure metadata_element_to_edit isn't null (may occur when multiple files are selected)
|
---|
| 587 | else if (metadata_element_to_edit != null) {
|
---|
| 588 |
|
---|
| 589 | // the gs.filenameEncoding metadata is unique in that, when added, removed or
|
---|
| 590 | // changed, it must be applied on the file(name) whose metadata has been adjusted
|
---|
| 591 | if(metadata_element_name_full.equals(FILENAME_ENCODING_METADATA)) {
|
---|
| 592 | new_metadata_value_string = processFilenameEncoding(file_path_regexp, file_node, new_metadata_value_string, false);
|
---|
| 593 | // true only if removing meta
|
---|
| 594 | }
|
---|
| 595 | XMLTools.setElementTextValue(metadata_element_to_edit, new_metadata_value_string);
|
---|
| 596 | }
|
---|
| 597 | }
|
---|
| 598 |
|
---|
| 599 | // Remember that we've changed the file so it gets saved when a new one is loaded
|
---|
| 600 | loaded_file_changed = true;
|
---|
| 601 | }
|
---|
| 602 |
|
---|
| 603 |
|
---|
| 604 | static public void saveLoadedFile()
|
---|
| 605 | {
|
---|
| 606 | // If we have a file loaded into memory and it has been modified, save it now
|
---|
| 607 | if (loaded_file != null && loaded_file_changed == true) {
|
---|
| 608 | XMLTools.writeXMLFile(loaded_file, loaded_file_document, nonEscapingElements);
|
---|
| 609 |
|
---|
| 610 |
|
---|
| 611 | loaded_file_changed = false;
|
---|
| 612 | }
|
---|
| 613 | }
|
---|
| 614 |
|
---|
| 615 |
|
---|
| 616 | /**
|
---|
| 617 | * Every metadata.xml file must be skimmed when a collection is opened, for three very important reasons:
|
---|
| 618 | * - To handle any non-namespaced metadata in the metadata.xml files (this is mapped and the files rewritten)
|
---|
| 619 | * - To get a complete list of the metadata elements in the collection (used in Design and Format panes)
|
---|
| 620 | * - To build complete and accurate metadata value trees (used in the Enrich pane)
|
---|
| 621 | */
|
---|
| 622 | public void skimFile()
|
---|
| 623 | {
|
---|
| 624 | boolean file_changed = false;
|
---|
| 625 |
|
---|
| 626 | // Parse the metadata.xml file
|
---|
| 627 | DebugStream.println("Skimming metadata.xml file " + this + "...");
|
---|
| 628 |
|
---|
| 629 | Document document = XMLTools.parseXMLFile(this);
|
---|
| 630 | if (document == null) {
|
---|
| 631 | System.err.println("Error: Could not parse metadata.xml file " + getAbsolutePath());
|
---|
| 632 | return;
|
---|
| 633 | }
|
---|
| 634 |
|
---|
| 635 | // Read all the Metadata elements in the file
|
---|
| 636 | HashMap target_metadata_element_name_attrs_cache = new HashMap();
|
---|
| 637 | NodeList metadata_elements_nodelist = document.getElementsByTagName(METADATA_ELEMENT);
|
---|
| 638 | for (int i = 0; i < metadata_elements_nodelist.getLength(); i++) {
|
---|
| 639 | Element current_metadata_element = (Element) metadata_elements_nodelist.item(i);
|
---|
| 640 | String metadata_element_name_full = current_metadata_element.getAttribute("name");
|
---|
| 641 | String metadata_set_namespace = MetadataTools.getMetadataSetNamespace(metadata_element_name_full);
|
---|
| 642 |
|
---|
| 643 | // Ignore legacy crap
|
---|
| 644 | if (metadata_set_namespace.equals("hidden")) {
|
---|
| 645 | continue;
|
---|
| 646 | }
|
---|
| 647 |
|
---|
| 648 | MetadataSet metadata_set = MetadataSetManager.getMetadataSet(metadata_set_namespace);
|
---|
| 649 | if (metadata_set == null) {
|
---|
| 650 | // The metadata set isn't loaded, so give the option of mapping the element into a loaded set
|
---|
| 651 | String target_metadata_element_name_full = MetadataSetManager.mapUnloadedMetadataElement(metadata_element_name_full);
|
---|
| 652 | if (target_metadata_element_name_full == null || target_metadata_element_name_full.equals("")) {
|
---|
| 653 | // Skip this element if we still don't have a loaded element for it
|
---|
| 654 | continue;
|
---|
| 655 | }
|
---|
| 656 |
|
---|
| 657 | // Update the metadata.xml file to have the new (namespaced) element name
|
---|
| 658 | // Instead of using current_metadata_element.setAttribute("name", target_metadata_element_name_full)
|
---|
| 659 | // we create an Attr object for each target metadata element name, and cache them
|
---|
| 660 | // This makes a *huge* difference (namespacing a metadata.xml file with 45000 metadata entries now
|
---|
| 661 | // takes 45 seconds instead of 30 minutes!) -- why is setting the value of a Node so slow?
|
---|
| 662 | Attr target_metadata_element_name_attr = (Attr) target_metadata_element_name_attrs_cache.get(target_metadata_element_name_full);
|
---|
| 663 | if (target_metadata_element_name_attr == null) {
|
---|
| 664 | target_metadata_element_name_attr = document.createAttribute("name");
|
---|
| 665 | target_metadata_element_name_attr.setValue(target_metadata_element_name_full);
|
---|
| 666 | target_metadata_element_name_attrs_cache.put(target_metadata_element_name_full, target_metadata_element_name_attr);
|
---|
| 667 | }
|
---|
| 668 |
|
---|
| 669 | // Remove the old name attribute and add the new (namespaced) one
|
---|
| 670 | current_metadata_element.removeAttribute("name");
|
---|
| 671 | current_metadata_element.setAttributeNode((Attr) target_metadata_element_name_attr.cloneNode(false));
|
---|
| 672 | file_changed = true;
|
---|
| 673 |
|
---|
| 674 | metadata_element_name_full = target_metadata_element_name_full;
|
---|
| 675 | metadata_set_namespace = MetadataTools.getMetadataSetNamespace(metadata_element_name_full);
|
---|
| 676 | metadata_set = MetadataSetManager.getMetadataSet(metadata_set_namespace);
|
---|
| 677 | }
|
---|
| 678 |
|
---|
| 679 | String metadata_element_name = MetadataTools.getMetadataElementName(metadata_element_name_full);
|
---|
| 680 | MetadataElement metadata_element = metadata_set.getMetadataElementWithName(metadata_element_name);
|
---|
| 681 |
|
---|
| 682 | // If the element doesn't exist in the metadata set, add it
|
---|
| 683 | if (metadata_element == null) {
|
---|
| 684 | metadata_element = metadata_set.addMetadataElementForThisSession(metadata_element_name);
|
---|
| 685 | }
|
---|
| 686 |
|
---|
| 687 | // Square brackets need to be escaped because they are a special character in Greenstone
|
---|
| 688 | String metadata_value_string = XMLTools.getElementTextValue(current_metadata_element);
|
---|
| 689 | metadata_value_string = metadata_value_string.replaceAll("[", "[");
|
---|
| 690 | metadata_value_string = metadata_value_string.replaceAll("]", "]");
|
---|
| 691 |
|
---|
| 692 | metadata_element.addMetadataValue(metadata_value_string);
|
---|
| 693 | }
|
---|
| 694 |
|
---|
| 695 | // Rewrite the metadata.xml file if it has changed
|
---|
| 696 | if (file_changed) {
|
---|
| 697 | XMLTools.writeXMLFile(this, document);
|
---|
| 698 | }
|
---|
| 699 | }
|
---|
| 700 |
|
---|
| 701 | /**
|
---|
| 702 | * The gs.filenameEncoding metadata is unique in that, when added, removed or
|
---|
| 703 | * replaced, it must be applied on the file(name) whose metadata has been
|
---|
| 704 | * adjusted.
|
---|
| 705 | * This method handles all that, given the regular expression or filepath name
|
---|
| 706 | * to match on (.* matches subdirectories), the affected fileNode, the new
|
---|
| 707 | * encoding value and whether a new encoding value has been added/an existing
|
---|
| 708 | * one has been replaced or whether the encoding metadata has been removed.
|
---|
| 709 | * The new adjusted value for the encoding metadata is returned.
|
---|
| 710 | *
|
---|
| 711 | * MetadataXMLFileManager maintains a hashmap of (URL-encoded filepaths, encoding)
|
---|
| 712 | * to allow fast access to previously assigned gs.filenameEncoding metadata (if
|
---|
| 713 | * any) for each file. This hashmap also needs to be updated, but this update
|
---|
| 714 | * is complicated by the fact that it concerns regular expressions that could
|
---|
| 715 | * affect multiple filenames.
|
---|
| 716 | */
|
---|
| 717 | public String processFilenameEncoding(String file_path_regexp, CollectionTreeNode file_node,
|
---|
| 718 | String encoding_metadata_value, boolean removingMetadata)
|
---|
| 719 | {
|
---|
| 720 | if(!FilenameEncoding.MULTIPLE_FILENAME_ENCODINGS_SUPPORTED) {
|
---|
| 721 | return encoding_metadata_value;
|
---|
| 722 | }
|
---|
| 723 |
|
---|
| 724 | // Work out this filenode's new encoding and apply it:
|
---|
| 725 |
|
---|
| 726 | if(removingMetadata) { // encoding_metadata_value = ""
|
---|
| 727 | // gs.filenameEncoding metadata being removed, work out
|
---|
| 728 | // any inherited metadata to replace it with in the meta-table
|
---|
| 729 | encoding_metadata_value = FilenameEncoding.getInheritedFilenameEncoding(
|
---|
| 730 | file_node.getURLEncodedFilePath(), file_node.getFile());
|
---|
| 731 | // should be canonical encoding already
|
---|
| 732 | }
|
---|
| 733 | else if(!encoding_metadata_value.equals("")) {
|
---|
| 734 | // if adding or replacing filename encoding,
|
---|
| 735 | // get the canonical encoding name for this alias
|
---|
| 736 | encoding_metadata_value = FilenameEncoding.canonicalEncodingName(encoding_metadata_value);
|
---|
| 737 | }
|
---|
| 738 | // Reencode the display of this filenode only as any affected
|
---|
| 739 | // childnodes will be reencoded on FileNode.refreshDescendantEncodings()
|
---|
| 740 | file_node.reencodeDisplayName(encoding_metadata_value);
|
---|
| 741 |
|
---|
| 742 |
|
---|
| 743 | // Whether removing or adding/replacing the file's gs.filename encoding meta,
|
---|
| 744 | // store this in the file-to-encoding map for fast access, since the map stores
|
---|
| 745 | // empty string values when no meta has been assigned at this file level.
|
---|
| 746 | // In the case of removingMetadata, the value stored will be the fallback value
|
---|
| 747 |
|
---|
| 748 | String urlpath = file_node.getURLEncodedFilePath();
|
---|
| 749 | if(removingMetadata) {
|
---|
| 750 | // remove it from the map instead of inserting "", so that when folders in the collectiontree
|
---|
| 751 | // are being deleted or shifted, the removemetada (and addmetadata) calls that get fired
|
---|
| 752 | // for each affected filenodes does not cause the undesirable effect of multiple "" to be
|
---|
| 753 | // entered into the filename-to-encoding map for filepaths that no longer exist .
|
---|
| 754 | FilenameEncoding.map.remove(urlpath);
|
---|
| 755 | } else { // for adding and replacing, put the encoding into the map (also replaces any existing encoding for it)
|
---|
| 756 | FilenameEncoding.map.put(urlpath, encoding_metadata_value);
|
---|
| 757 | }
|
---|
| 758 |
|
---|
| 759 | // If new folder-level metadata (or metadata for a set of files fitting a pattern) has been
|
---|
| 760 | // assigned, the file_to_encodings map will be cleared for all descendant folders and files,
|
---|
| 761 | // so that these can be re-calculated upon refreshing the visible parts of the CollectionTree.
|
---|
| 762 | // Mark the state as requiring a refresh of the CollectionTree.
|
---|
| 763 | // This next step also serves to prevent the MetadataValueTableModel from trying to update
|
---|
| 764 | // itself while a refresh (involving re-encoding of filenames of visible nodes) is in progress.
|
---|
| 765 | FilenameEncoding.setRefreshRequired(true);
|
---|
| 766 |
|
---|
| 767 | return encoding_metadata_value;
|
---|
| 768 | }
|
---|
| 769 | }
|
---|