PluginWrapper.java from BIRT at Krugle

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/*******************************************************************************
 * Copyright (c) 2004 Actuate Corporation. All rights reserved. This program and
 * the accompanying materials are made available under the terms of the Eclipse
 * Public License v1.0 which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors: Actuate Corporation - initial API and implementation
 ******************************************************************************/

package org.eclipse.birt.build;

import java.io.File;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.apache.tools.ant.BuildException;
import org.w3c.dom.Document;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;


/**
 *  Internal representation of a plugin.xml.
 *
 *  @author Rock Yu
 */

public class PluginWrapper
{

	File pluginFile = null;
	String pluginID = null;
	String pluginVersion = null;

	public PluginWrapper( )
	{
	}

	/**
	 * @param pluginXML
	 */
	public PluginWrapper( File pluginXML )
	{
		this.pluginFile = pluginXML;
		parse( );
	}

	private void parse( )
	{
		try
		{
			DocumentBuilder builder = DocumentBuilderFactory.newInstance( )
					.newDocumentBuilder( );
			Document doc = builder.parse( pluginFile );

			NodeList nodes = doc.getElementsByTagName( "plugin" ); //$NON-NLS-1$
			for ( int i = 0; i < nodes.getLength( ); i++ )
			{
				Node node = nodes.item( i );
				NamedNodeMap map = node.getAttributes( );

				Node idNode = map.getNamedItem( "id" ); //$NON-NLS-1$
				Node versionNode = map.getNamedItem( "version" ); //$NON-NLS-1$

				if ( idNode != null )
					this.pluginID = StringUtil.trimString( idNode
							.getNodeValue( ) ); //$NON-NLS-1$

				if ( versionNode != null )
					this.pluginVersion = StringUtil.trimString( versionNode
							.getNodeValue( ) );
			}
		}
		catch ( Exception e )
		{
			throw new BuildException(
					"Exception occured when parsing :" + pluginFile + ". " + e ); //$NON-NLS-1$
		}
	}

	/**
	 * Load and parse an "plugin.xml file
	 * @param pluginXML
	 */
	
	public void load( File pluginXML )
	{
		this.pluginFile = pluginXML;
		this.parse( );
	}

	public String getPluginID( )
	{
		return pluginID;
	}

	public String getPluginVersion( )
	{
		return pluginVersion;
	}
}
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