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/*******************************************************************************
 * Copyright (c) 2001, 2008 IBM Corporation and others.
 * 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:
 * IBM Corporation - initial API and implementation
 *******************************************************************************/
/*
 * Created on May 3, 2004
 *
 * To change the template for this generated file go to
 * Window - Preferences - Java - Code Generation - Code and Comments
 */
package org.eclipse.wst.validation.internal;

import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.wst.validation.internal.operations.ReferencialFileValidator;
import org.eclipse.wst.validation.internal.plugin.ValidationPlugin;

/**
 * @author vijayb
 */
public class ReferencialFileValidatorExtension {
	private String id = null;
	private ReferencialFileValidator instance;
	private boolean errorCondition = false;
	private IConfigurationElement element;
	
	/** referencialFileValidator */
	public static final String REF_FILE_VALIDATOR_EXTENSION = "referencialFileValidator"; //$NON-NLS-1$
	
	/** run */
	public static final String RUN = "run"; //$NON-NLS-1$
	
	/** id */
	public static final String ATT_ID = "id"; //$NON-NLS-1$
	
	/** class */
	public static final String ATT_CLASS = "class"; //$NON-NLS-1$

	public ReferencialFileValidatorExtension() {
		super();
	}

	public ReferencialFileValidator getInstance() {
		try {
			if (instance == null && !errorCondition)
				instance = (ReferencialFileValidator) element.createExecutableExtension(RUN);
		} catch (Exception e) {
			ValidationPlugin.getPlugin().handleException(e);
			errorCondition = true;
		}
		return instance;
	}

	public ReferencialFileValidatorExtension(IConfigurationElement element) {
		if(!REF_FILE_VALIDATOR_EXTENSION.equals(element.getName()))
			throw new IllegalArgumentException("Extensions must be of the type \"" + REF_FILE_VALIDATOR_EXTENSION + "\"."); //$NON-NLS-1$ //$NON-NLS-2$
		this.element = element;
		init();
	}

	private void init() {
		this.id = this.element.getAttribute(ATT_ID);
	}

	/**
	 * @return Returns the id.
	 */
	public String getId() {
		return id;
	}
	
	public IConfigurationElement getElement() {
		return element;
	}

	/**
	 * @param id
	 *            The id to set.
	 */
	public void setId(String id) {
		this.id = id;
	}
}