source: trunk/gli/src/org/greenstone/gatherer/metadata/MetadataXMLFileManager.java@ 7822

package org.greenstone.gatherer.metadata;


import java.io.*;
import java.util.*;
import org.greenstone.gatherer.file.FileNode;


/** This class is a static class that manages the metadata.xml files */
public class MetadataXMLFileManager
{
   static private ArrayList metadata_xml_files = new ArrayList();


   static public void addMetadata(FileNode[] file_nodes, MetadataValue metadata_value)
   {
      for (int i = 0; i < file_nodes.length; i++) {
     File current_file = file_nodes[i].getFile();
     System.err.println("Adding metadata to " + current_file.getAbsolutePath());

     // Find which metadata.xml file needs editing
     File current_file_directory = (current_file.isDirectory() ? current_file : current_file.getParentFile());
     for (int j = 0; j < metadata_xml_files.size(); j++) {
        MetadataXMLFile metadata_xml_file = (MetadataXMLFile) metadata_xml_files.get(j);

        // This metadata.xml file is only potentially applicable if it is above or at the same level as the file
        if (current_file_directory.getAbsolutePath().startsWith(metadata_xml_file.getParentFile().getAbsolutePath())) {
           metadata_xml_file.addMetadata(current_file, metadata_value);
        }
     }
      }
   }


   static public void clearMetadataXMLFiles()
   {
      metadata_xml_files.clear();
   }


   static public ArrayList getMetadataAssignedToFile(File file)
   {
      // Build up a list of metadata values assigned to this file
      ArrayList metadata_values = new ArrayList();

      // Look at each loaded metadata.xml file to see if any assign metadata to this file
      File file_directory = (file.isDirectory() ? file : file.getParentFile());
      for (int i = 0; i < metadata_xml_files.size(); i++) {
     MetadataXMLFile metadata_xml_file = (MetadataXMLFile) metadata_xml_files.get(i);

     // This metadata.xml file is only potentially applicable if it is above or at the same level as the file
     if (file_directory.getAbsolutePath().startsWith(metadata_xml_file.getParentFile().getAbsolutePath())) {
        metadata_values.addAll(metadata_xml_file.getMetadataAssignedToFile(file));
     }
      }

      return metadata_values;
   }


   static public void loadMetadataXMLFiles(File directory)
   {
      // Look recursively at each subfile of the directory for metadata.xml files
      File[] directory_files = directory.listFiles();
      for (int i = 0; i < directory_files.length; i++) {
     File child_file = directory_files[i];
     if (child_file.isDirectory()) {
        loadMetadataXMLFiles(child_file);
     }
     else if (child_file.getName().equals("metadata.xml")) {
        loadMetadataXMLFile(child_file);
     }
      }
   }


   static private void loadMetadataXMLFile(File metadata_xml_file_file)
   {
      MetadataXMLFile metadata_xml_file = new MetadataXMLFile(metadata_xml_file_file.getAbsolutePath());
      metadata_xml_files.add(metadata_xml_file);
   }


   static public void removeMetadata(FileNode[] file_nodes, MetadataValue metadata_value)
   {
      for (int i = 0; i < file_nodes.length; i++) {
     File current_file = file_nodes[i].getFile();
     System.err.println("Removing metadata from " + current_file.getAbsolutePath());

     // Find which metadata.xml file needs editing
     File current_file_directory = (current_file.isDirectory() ? current_file : current_file.getParentFile());
     for (int j = 0; j < metadata_xml_files.size(); j++) {
        MetadataXMLFile metadata_xml_file = (MetadataXMLFile) metadata_xml_files.get(j);

        // This metadata.xml file is only potentially applicable if it is above or at the same level as the file
        if (current_file_directory.getAbsolutePath().startsWith(metadata_xml_file.getParentFile().getAbsolutePath())) {
           System.err.println("Applicable metadata.xml file: " + metadata_xml_file.getAbsolutePath());
           metadata_xml_file.removeMetadata(current_file, metadata_value);
        }
     }
      }
   }
}