SamplesViewContentProvider.java

/**
 * This file Copyright (c) 2005-2008 Aptana, Inc. This program is
 * dual-licensed under both the Aptana Public License and the GNU General
 * Public license. You may elect to use one or the other of these licenses.
 * 
 * This program is distributed in the hope that it will be useful, but
 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
 * NONINFRINGEMENT. Redistribution, except as permitted by whichever of
 * the GPL or APL you select, is prohibited.
 *
 * 1. For the GPL license (GPL), you can redistribute and/or modify this
 * program under the terms of the GNU General Public License,
 * Version 3, as published by the Free Software Foundation.  You should
 * have received a copy of the GNU General Public License, Version 3 along
 * with this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 * 
 * Aptana provides a special exception to allow redistribution of this file
 * with certain other free and open source software ("FOSS") code and certain additional terms
 * pursuant to Section 7 of the GPL. You may view the exception and these
 * terms on the web at http://www.aptana.com/legal/gpl/.
 * 
 * 2. For the Aptana Public License (APL), this program and the
 * accompanying materials are made available under the terms of the APL
 * v1.0 which accompanies this distribution, and is available at
 * http://www.aptana.com/legal/apl/.
 * 
 * You may view the GPL, Aptana's exception and additional terms, and the
 * APL in the file titled license.html at the root of the corresponding
 * plugin containing this source file.
 * 
 * Any modifications to this file must keep this entire header intact.
 */
package com.aptana.ide.samples.ui;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.Viewer;

import com.aptana.ide.samples.SamplesManager;
import com.aptana.ide.samples.model.SamplesEntry;
import com.aptana.ide.samples.model.SamplesInfo;

/**
 * @author Kevin Lindsey
 */
public class SamplesViewContentProvider implements ITreeContentProvider
{

	/**
	 * APTANA_PREFIX
	 */
	public static final String APTANA_PREFIX = "Aptana"; //$NON-NLS-1$

	/**
	 * LOADING
	 */
	public static final Object LOADING = new Object();

	/**
	 * SnippetsViewContentProvider
	 */
	public SamplesViewContentProvider()
	{
	
	}

	/**
	 * @see org.eclipse.jface.viewers.ITreeContentProvider#getChildren(java.lang.Object)
	 */
	public Object[] getChildren(Object parentElement)
	{
		Object[] result = new Object[0];

		if (parentElement instanceof SamplesInfo)
		{
			SamplesInfo info = (SamplesInfo) parentElement;
			result = info.getRootSamples().toArray();
		}
		else if (parentElement instanceof SamplesEntry)
		{
			result = ((SamplesEntry) parentElement).getSubEntries().toArray();
		}

		return result;
	}

	/**
	 * @see org.eclipse.jface.viewers.ITreeContentProvider#getParent(java.lang.Object)
	 */
	public Object getParent(Object element)
	{
		if (element == LOADING)
		{
			return null;
		}
		else if (element instanceof SamplesEntry)
		{
			return ((SamplesEntry) element).getParent();
		}
		else if (element instanceof SamplesManager)
		{
			return null;
		}
		return SamplesManager.getInstance();
	}

	/**
	 * @see org.eclipse.jface.viewers.ITreeContentProvider#hasChildren(java.lang.Object)
	 */
	public boolean hasChildren(Object element)
	{
		boolean result = false;

		if (element instanceof SamplesInfo)
		{
			result = !((SamplesInfo) element).getRootSamples().isEmpty();
		}
		else if (element instanceof SamplesEntry)
		{
			result = !((SamplesEntry) element).getSubEntries().isEmpty();
		}

		return result;
	}

	/**
	 * @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)
	 */
	public Object[] getElements(Object inputElement)
	{
		if (inputElement == LOADING)
		{
			return new Object[] { LOADING };
		}
		SamplesInfo[] result;

		if (inputElement instanceof SamplesManager)
		{
			SamplesManager list = (SamplesManager) inputElement;

			result = list.getSamplesInfos();
			List<SamplesInfo> infos = new ArrayList<SamplesInfo>();
			for (int i = 0; i < result.length; i++)
			{
				infos.add(result[i]);
			}
			Collections.sort(infos, new Comparator<SamplesInfo>()
			{

				public int compare(SamplesInfo o1, SamplesInfo o2)
				{
					String name1 = o1.getName();
					String name2 = o2.getName();
					if (name1.startsWith(APTANA_PREFIX) && !name2.startsWith(APTANA_PREFIX))
					{
						return -1;
					}
					else if (!name1.startsWith(APTANA_PREFIX) && name2.startsWith(APTANA_PREFIX))
					{
						return 1;
					}
					else
					{
						return name1.compareToIgnoreCase(name2);
					}
				}
			});
			result = infos.toArray(new SamplesInfo[0]);
		}
		else
		{
			result = new SamplesInfo[0];
		}

		return result;
	}

	/**
	 * @see org.eclipse.jface.viewers.IContentProvider#dispose()
	 */
	public void dispose()
	{

	}

	/**
	 * @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer, java.lang.Object,
	 *      java.lang.Object)
	 */
	public void inputChanged(Viewer viewer, Object oldInput, Object newInput)
	{

	}
}