/*******************************************************************************
 * Copyright (c) 2001, 2004 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
 *******************************************************************************/
package org.eclipse.wst.xsd.ui.internal.provider;

import java.util.ArrayList;
import java.util.Collection;

import org.eclipse.emf.common.notify.AdapterFactory;
import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.edit.provider.IChangeNotifier;
import org.eclipse.emf.edit.provider.INotifyChangedListener;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.ILabelProviderListener;
import org.eclipse.jface.viewers.ITableLabelProvider;
import org.eclipse.swt.graphics.Image;

public class XSDAdapterFactoryLabelProvider implements ILabelProvider, INotifyChangedListener, ITableLabelProvider {
	protected XSDModelAdapterFactoryImpl adapterFactory;
	protected Collection labelProviderListeners;

	/**
	 * 
	 */
	public XSDAdapterFactoryLabelProvider(XSDModelAdapterFactoryImpl adapterFactory) {
		this.adapterFactory = adapterFactory;
		labelProviderListeners = new ArrayList();
	}

	/**
	 * Return the wrapped AdapterFactory.
	 */
	public AdapterFactory getAdapterFactory() {
		return adapterFactory;
	}

	/**
	 * Set the wrapped AdapterFactory.
	 */
	public void setAdapterFactory(XSDModelAdapterFactoryImpl adapterFactory) {
		if (this.adapterFactory instanceof IChangeNotifier) {
			((IChangeNotifier) this.adapterFactory).removeListener(this);
		}

		if (adapterFactory instanceof IChangeNotifier) {
			((IChangeNotifier) adapterFactory).addListener(this);
		}

		this.adapterFactory = adapterFactory;
	}

	/**
	 * Since we won't ever generate these notifications, we can just ignore
	 * this.
	 */
	public void addListener(ILabelProviderListener listener) {
		labelProviderListeners.add(listener);
	}

	/**
	 * Since we won't ever add listeners, we can just ignore this.
	 */
	public void removeListener(ILabelProviderListener listener) {
		labelProviderListeners.remove(listener);
	}

	/**
	 * This discards the content provider and removes this as a listener to
	 * the {@link #adapterFactory}.
	 */
	public void dispose() {
		if (this.adapterFactory instanceof IChangeNotifier) {
			((IChangeNotifier) adapterFactory).removeListener(this);
		}
	}

	/**
	 * This always returns true right now.
	 */
	public boolean isLabelProperty(Object object, String id) {
		return true;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.viewers.ILabelProvider#getImage(java.lang.Object)
	 */
	public Image getImage(Object object) {
		ILabelProvider labelProvider = (ILabelProvider) adapterFactory.adapt(object, ILabelProvider.class);

		return labelProvider != null ? labelProvider.getImage(object) : null;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.viewers.ILabelProvider#getText(java.lang.Object)
	 */
	public String getText(Object object) {
		// Get the adapter from the factory.
		//
		ILabelProvider labelProvider = (ILabelProvider) adapterFactory.adapt(object, ILabelProvider.class);

		return labelProvider != null ? labelProvider.getText(object) : object == null ? "" : object.toString();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.emf.edit.provider.INotifyChangedListener#notifyChanged(org.eclipse.emf.common.notify.Notification)
	 */
	public void notifyChanged(Notification notification) {
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.viewers.ITableLabelProvider#getColumnImage(java.lang.Object,
	 *      int)
	 */
	public Image getColumnImage(Object element, int columnIndex) {
		return getImage(element);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.viewers.ITableLabelProvider#getColumnText(java.lang.Object,
	 *      int)
	 */
	public String getColumnText(Object element, int columnIndex) {
		return getText(element);
	}

}