AOO410/main/scripting/java/org/openoffice/netbeans/modules/office/actions/ParcelDescriptorParserSupport.java

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 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
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 * software distributed under the License is distributed on an
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package org.openoffice.netbeans.modules.office.actions;

import java.io.*;
import java.util.*;
import javax.swing.event.ChangeListener;
import javax.swing.event.ChangeEvent;

import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;

import org.openide.filesystems.*;
import org.openide.xml.XMLUtil;

public class ParcelDescriptorParserSupport
    implements ParcelDescriptorParserCookie, FileChangeListener
{
    private FileObject fo;
    private Document document;
    private Set listeners;
    
    public ParcelDescriptorParserSupport(FileObject fo)
    {
        this.fo = fo;
        fo.addFileChangeListener(this);
    }

    private synchronized void parseFile()
    {
        File file = FileUtil.toFile(fo);
        InputSource is;
        
        try {
            is = new InputSource(new FileInputStream(file));
        }
        catch (FileNotFoundException fnfe) {
            System.out.println("Couldn't find file: " + file.getName());
            return;
        }
        
        document = null;
        try {
            document = XMLUtil.parse(is, false, false, null, null);
        }
        catch (IOException ioe) {
            System.out.println("IO Error parsing file: " + file.getName());
        }
        catch (SAXException se) {
            System.out.println("Sax Error parsing file: " + file.getName());
        }
    }

    public synchronized NodeList getScriptElements()
    {
        if (document == null)
            parseFile();
        
        if (document != null)
            return document.getElementsByTagName("script");
        return null;
    }
    
    public void addChangeListener(ChangeListener cl) {
        if (listeners == null)
            listeners = new HashSet();
        
        listeners.add(cl);
    }
    
    public void removeChangeListener(ChangeListener cl) {
        if (listeners == null)
            return;
        
        listeners.remove(cl);
    }
    
    public void fileChanged(FileEvent fe) {
        parseFile();
        
        if (listeners != null) {
            Iterator iter = listeners.iterator();
         
            while (iter.hasNext())
                ((ChangeListener)iter.next()).stateChanged(new ChangeEvent(this));
        }
    }
    
    public void fileAttributeChanged(FileAttributeEvent fe) {}
    public void fileDataCreated(FileEvent fe) {}
    public void fileDeleted(FileEvent fe) {}
    public void fileFolderCreated(FileEvent fe) {}
    public void fileRenamed(FileRenameEvent fe) {}
}