[8601] | 1 | /**
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| 2 | *#########################################################################
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| 3 | *
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| 4 | * A component of the Gatherer application, part of the Greenstone digital
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| 5 | * library suite from the New Zealand Digital Library Project at the
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| 6 | * University of Waikato, New Zealand.
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| 7 | *
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| 8 | * Author: John Thompson, Greenstone Digital Library, University of Waikato
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| 9 | *
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| 10 | * Copyright (C) 1999 New Zealand Digital Library Project
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or modify
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| 13 | * it under the terms of the GNU General Public License as published by
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| 14 | * the Free Software Foundation; either version 2 of the License, or
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| 15 | * (at your option) any later version.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful,
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| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 20 | * GNU General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, write to the Free Software
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| 24 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 25 | *########################################################################
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| 26 | */
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| 27 | package org.greenstone.gatherer.cdm;
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| 28 |
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| 29 | import java.io.*;
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| 30 | import java.util.*;
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[9302] | 31 | import org.greenstone.gatherer.DebugStream;
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[12642] | 32 | import org.greenstone.gatherer.greenstone.Plugins;
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[8601] | 33 | import org.greenstone.gatherer.util.StaticStrings;
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| 34 | import org.w3c.dom.*;
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| 35 |
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[12631] | 36 |
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[8601] | 37 | /** This class is responsible for storing information from a parsed pluginfo call in such a way that it allows easy access to parsed details for the purposes of user design and specification of plugins. */
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| 38 | public class Plugin
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[12631] | 39 | extends ArgumentContainer
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| 40 | {
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| 41 | private String default_block_expression = "";
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| 42 | private String default_process_expression = "";
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[12247] | 43 | private boolean does_explode_metadata_databases = false;
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[13177] | 44 | private boolean loading_options_failed = false;
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[12631] | 45 |
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[12247] | 46 |
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[8601] | 47 | /** Constructor used in DOMProxyListModel initializations, and Library Level. Used for Base plugins (those in the list of available plugins, not ones that are in the DOMProxyList)
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| 48 | */
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| 49 | public Plugin() {
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| 50 | }
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[12631] | 51 |
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[8601] | 52 |
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| 53 | public Plugin(Element element, Plugin base_plugin) {
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[12247] | 54 | super(element, base_plugin);
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[8601] | 55 | }
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| 56 |
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[12631] | 57 |
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[8601] | 58 | /** Method to compare two plugins for ordering.
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[12247] | 59 | * We override the base method cos we compare by plugin name rather than toString()
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[8601] | 60 | */
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| 61 | public int compareTo(Object object) {
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| 62 | if(object instanceof Plugin) {
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| 63 | return name.compareTo(((Plugin)object).getName());
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| 64 | }
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| 65 | return -1;
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| 66 | }
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[12631] | 67 |
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[12247] | 68 |
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[8601] | 69 | /** The assigned plugin constructor.
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| 70 | * @param element the DOM Element this plugin is based upon
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| 71 | */
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| 72 | public DOMProxyListEntry create(Element element) {
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| 73 | String plugin_name = element.getAttribute(StaticStrings.TYPE_ATTRIBUTE);
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| 74 | // Determine the base plugin from the plugin name
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[12642] | 75 | Plugin base_plugin = Plugins.getPlugin(plugin_name, true);
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[8601] | 76 | Plugin plugin = new Plugin(element, base_plugin);
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[12247] | 77 | if (base_plugin == null) {
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| 78 | plugin.setAssigned(false);
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| 79 | }
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[8601] | 80 | base_plugin = null;
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| 81 | plugin_name = null;
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| 82 | return plugin;
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| 83 | }
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| 84 |
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[8607] | 85 |
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[13177] | 86 | public boolean didLoadingOptionsFail()
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| 87 | {
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| 88 | return loading_options_failed;
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| 89 | }
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| 90 |
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| 91 |
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[8768] | 92 | /** Checks whether the plugin this instance is based on processes metadata databases that can be exploded. */
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| 93 | public boolean doesExplodeMetadataDatabases()
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| 94 | {
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[12642] | 95 | Plugin base_plugin = Plugins.getPlugin(getName(), false);
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[9126] | 96 | if (base_plugin == null) {
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| 97 | return false;
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| 98 | }
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| 99 | return base_plugin.does_explode_metadata_databases;
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[8768] | 100 | }
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| 101 |
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| 102 |
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[11378] | 103 | /** Checks whether this plugin instance will process the specified file (given its block_exp). */
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| 104 | public boolean doesBlockFile(File file)
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| 105 | {
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| 106 | // Check the filename against the plugin's block_exp value
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[12247] | 107 | ArrayList arguments = getArguments();
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[11378] | 108 | for (int i = 0; i < arguments.size(); i++) {
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| 109 | Argument argument = (Argument) arguments.get(i);
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| 110 | if (argument.getName().equals("block_exp")) {
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| 111 | // Try the assigned value first, for when the user has manually set the value
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| 112 | String regular_expression = argument.getValue();
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| 113 | if (regular_expression == null || regular_expression.equals("")) {
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| 114 | // Not set, so use the default value
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| 115 | regular_expression = argument.getDefaultValue();
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| 116 | if (regular_expression.equals("")) {
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| 117 | continue;
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| 118 | }
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| 119 | }
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| 120 |
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[12631] | 121 | if (doesFileMatchRegularExpression(file, regular_expression)) {
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[11378] | 122 | return true;
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| 123 | }
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| 124 | }
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| 125 | }
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| 126 |
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[12631] | 127 | // Try the plugin's default block expression
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| 128 | if (!default_block_expression.equals("") && doesFileMatchRegularExpression(file, default_block_expression)) {
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| 129 | return true;
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| 130 | }
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| 131 |
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[11378] | 132 | // This plugin will (probably) not deal with the specified file
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| 133 | return false;
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| 134 | }
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| 135 |
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| 136 |
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[9020] | 137 | /** Checks whether this plugin instance will process the specified file (given its process_exp). */
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[8607] | 138 | public boolean doesProcessFile(File file)
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| 139 | {
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[9020] | 140 | // Check the filename against the plugin's process_exp value
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[12247] | 141 | ArrayList arguments = getArguments();
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[8607] | 142 | for (int i = 0; i < arguments.size(); i++) {
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| 143 | Argument argument = (Argument) arguments.get(i);
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[9020] | 144 | if (argument.getName().equals("process_exp")) {
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[8607] | 145 | // Try the assigned value first, for when the user has manually set the value
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| 146 | String regular_expression = argument.getValue();
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| 147 | if (regular_expression == null || regular_expression.equals("")) {
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| 148 | // Not set, so use the default value
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| 149 | regular_expression = argument.getDefaultValue();
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| 150 | if (regular_expression.equals("")) {
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| 151 | continue;
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| 152 | }
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| 153 | }
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| 154 |
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[12631] | 155 | if (doesFileMatchRegularExpression(file, regular_expression)) {
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[8607] | 156 | return true;
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| 157 | }
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| 158 | }
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| 159 | }
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| 160 |
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[12631] | 161 | // Try the plugin's default process expression
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| 162 | if (!default_process_expression.equals("") && doesFileMatchRegularExpression(file, default_process_expression)) {
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| 163 | return true;
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| 164 | }
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| 165 |
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[8768] | 166 | // This plugin will (probably) not deal with the specified file
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[8607] | 167 | return false;
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| 168 | }
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| 169 |
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[12631] | 170 |
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| 171 | private boolean doesFileMatchRegularExpression(File file, String regular_expression)
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| 172 | {
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| 173 | // The $ at the end doesn't seem to work in Java, so need to add ".*" at the start
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| 174 | if (regular_expression.startsWith("(?i)")) {
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| 175 | // Don't mess up case-insensitive matching though
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| 176 | regular_expression = "(?i)" + ".*" + regular_expression.substring("(?i)".length());
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| 177 | }
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| 178 | else {
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| 179 | regular_expression = ".*" + regular_expression;
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| 180 | }
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| 181 |
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| 182 | // If the filename matches the regular expression, this plugin will deal with the file in some way
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| 183 | if (file.getName().matches(regular_expression)) {
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| 184 | return true;
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| 185 | }
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| 186 |
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| 187 | return false;
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| 188 | }
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| 189 |
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| 190 |
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[8601] | 191 | public boolean isSeparator() {
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| 192 | return (element != null && element.getAttribute(StaticStrings.SEPARATOR_ATTRIBUTE).equals(StaticStrings.TRUE_STR));
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| 193 | }
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| 194 |
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[12631] | 195 |
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| 196 | public void setDefaultBlockExpression(String default_block_expression)
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| 197 | {
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| 198 | this.default_block_expression = default_block_expression;
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| 199 | }
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| 200 |
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| 201 |
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| 202 | public void setDefaultProcessExpression(String default_process_expression)
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| 203 | {
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| 204 | this.default_process_expression = default_process_expression;
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| 205 | }
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| 206 |
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| 207 |
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| 208 | public void setDoesExplodeMetadataDatabases(boolean does_explode_metadata_databases)
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| 209 | {
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[8768] | 210 | this.does_explode_metadata_databases = does_explode_metadata_databases;
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| 211 | }
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[13177] | 212 |
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| 213 |
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| 214 | public void setLoadingOptionsFailed()
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| 215 | {
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| 216 | this.loading_options_failed = true;
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| 217 | }
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[8601] | 218 | }
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