TaggedComponentsContentProvider.java

/* ====================================================================
 * 
 * The ObjectStyle Group Software License, Version 1.0 
 *
 * Copyright (c) 2007 The ObjectStyle Group 
 * and individual authors of the software.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:  
 *       "This product includes software developed by the 
 *        ObjectStyle Group (http://objectstyle.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
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 * 4. The names "ObjectStyle Group" and "Cayenne" 
 *    must not be used to endorse or promote products derived
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 *    permission, please contact andrus@objectstyle.org.
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 * 5. Products derived from this software may not be called "ObjectStyle"
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 *
 * This software consists of voluntary contributions made by many
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 * information on the ObjectStyle Group, please see
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package org.objectstyle.wolips.jdt.ui.tags;

import java.io.InputStream;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;


public class TaggedComponentsContentProvider implements ITaggedComponentsContentProvider {

	public TagLib tagLib;
	private FirstLevelTagContentProvider[] firstLevelTagContentProviders;
	private IProject project;
	
	public TaggedComponentsContentProvider(IProject project) {
		super();
		this.project = project;
	}

	public Object[] getChildren() {
		if(tagLib == null) {
			this.tagLib = new TagLib(project);
		}
		if(firstLevelTagContentProviders == null) {
			firstLevelTagContentProviders = new FirstLevelTagContentProvider[tagLib.getTags().length];
			for (int i = 0; i < tagLib.getTags().length; i++) {
				Tag tag = tagLib.getTags()[i];
				FirstLevelTagContentProvider firstLevelTagContentProvider = new FirstLevelTagContentProvider(tag);
				firstLevelTagContentProviders[i] = firstLevelTagContentProvider;
			}
		}
		return firstLevelTagContentProviders;
	}

	public boolean hasChildren() {
		if(tagLib == null) {
			this.tagLib = new TagLib(project);
		}
		return tagLib.getTags().length > 0;
	}

	public InputStream getContents() throws CoreException {
		return null;
	}

	public IPath getFullPath() {
		return null;
	}

	public String getName() {
		return "Tagged Components";
	}

	public boolean isReadOnly() {
		return false;
	}

	public Object getAdapter(Class adapter) {
		return null;
	}
	
	public void forgetTagLib() {
		this.tagLib = null;
		this.firstLevelTagContentProviders = null;
	}

}