org.eclipse.net4j.util.ui.ManagedLabelProvider.java Source code

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Here is the source code for org.eclipse.net4j.util.ui.ManagedLabelProvider.java

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/*
 * Copyright (c) 2012 Eike Stepper (Berlin, Germany) 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:
 *    Eike Stepper - initial API and implementation
 */
package org.eclipse.net4j.util.ui;

import org.eclipse.jface.resource.DeviceResourceDescriptor;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.resource.LocalResourceManager;
import org.eclipse.jface.resource.ResourceManager;
import org.eclipse.jface.viewers.LabelProvider;

/**
 * @author Eike Stepper
 * @since 3.3
 */
public class ManagedLabelProvider extends LabelProvider {
    private ResourceManager resourceManager;

    public ManagedLabelProvider() {
    }

    @Override
    public void dispose() {
        if (resourceManager != null) {
            resourceManager.dispose();
            resourceManager = null;
        }

        super.dispose();
    }

    public Object getResource(DeviceResourceDescriptor descriptor) {
        ResourceManager resourceManager = getResourceManager();
        return resourceManager.get(descriptor);
    }

    public final ResourceManager getResourceManager() {
        if (resourceManager == null) {
            resourceManager = createResourceManager();
        }

        return resourceManager;
    }

    protected LocalResourceManager createResourceManager() {
        return new LocalResourceManager(JFaceResources.getResources());
    }
}