org.eclipse.wb.android.internal.support.resources.ui.ResourceContentProvider.java Source code

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Here is the source code for org.eclipse.wb.android.internal.support.resources.ui.ResourceContentProvider.java

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/*******************************************************************************
 * Copyright (c) 2011 Alexander Mitin (Alexander.Mitin@gmail.com)
 * 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:
 *    Alexander Mitin (Alexander.Mitin@gmail.com) - initial API and implementation
 *******************************************************************************/
package org.eclipse.wb.android.internal.support.resources.ui;

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

import com.android.ide.common.resources.ResourceItem;
import com.android.ide.common.resources.ResourceRepository;
import com.android.resources.ResourceType;

import org.apache.commons.lang.ArrayUtils;

import java.util.Arrays;
import java.util.Collection;
import java.util.List;

/**
 * Content provider for the {@link ResourceDialog}.
 * 
 * @author mitin_aa
 * @coverage android.support.resources
 */
public class ResourceContentProvider implements ITreeContentProvider {
    private ResourceRepository m_resources;

    ////////////////////////////////////////////////////////////////////////////
    //
    // Constructor
    //
    ////////////////////////////////////////////////////////////////////////////
    public ResourceContentProvider() {
    }

    ////////////////////////////////////////////////////////////////////////////
    //
    // ITreeContentProvider
    //
    ////////////////////////////////////////////////////////////////////////////
    public Object[] getChildren(Object parentElement) {
        if (parentElement instanceof ResourceType) {
            Collection<ResourceItem> resourceCollection = m_resources
                    .getResourceItemsOfType((ResourceType) parentElement);
            ResourceItem[] array = resourceCollection.toArray(new ResourceItem[resourceCollection.size()]);
            Arrays.sort(array);
            return array;
        }
        return null;
    }

    public boolean hasChildren(Object element) {
        if (element instanceof ResourceType) {
            return m_resources.hasResourcesOfType((ResourceType) element);
        }
        return false;
    }

    public Object[] getElements(Object inputElement) {
        if (inputElement instanceof ResourceRepository) {
            if ((ResourceRepository) inputElement == m_resources) {
                // get available resources
                List<ResourceType> types = m_resources.getAvailableResourceTypes();
                ResourceType[] typesArray = types.toArray(new ResourceType[types.size()]);
                Arrays.sort(typesArray);
                return typesArray;
            }
        }
        return ArrayUtils.EMPTY_OBJECT_ARRAY;
    }

    public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
        if (newInput instanceof ResourceRepository) {
            m_resources = (ResourceRepository) newInput;
        }
    }

    public void dispose() {
    }

    public Object getParent(Object element) {
        return null;
    }
}