org.eclipse.pde.internal.core.util.PackageFragmentRootPropertyTester.java Source code

Introduction

Here is the source code for org.eclipse.pde.internal.core.util.PackageFragmentRootPropertyTester.java

Source

/*******************************************************************************
 * Copyright (c) 2011 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.pde.internal.core.util;

import org.eclipse.core.expressions.PropertyTester;
import org.eclipse.jdt.core.*;
import org.eclipse.pde.internal.core.PDECore;

/**
 * Tests whether an object is a package fragment root with
 * a parent of the PDE classpath container (Plug-in Dependencies).  Intended for
 * use with the command/menu framework.  This tester is registered for the type
 * {@link IPackageFragmentRoot}.
 * 
 * <p>This class must always have a default constructor to function as a property tester</p>
 */
public class PackageFragmentRootPropertyTester extends PropertyTester {

    /**
     * A property indicating a whether a package fragment root belongs to the PDE 
     * classpath container.  (value <code>"inPluginContainer"</code>). No expected
     * value is required. 
     */
    public static final String PROP_IN_PLUGIN_CONTAINER = "inPluginContainer"; //$NON-NLS-1$

    /* (non-Javadoc)
     * @see org.eclipse.core.expressions.IPropertyTester#test(java.lang.Object, java.lang.String, java.lang.Object[], java.lang.Object)
     */
    public boolean test(Object receiver, String property, Object[] args, Object expectedValue) {
        if (property.equals(PROP_IN_PLUGIN_CONTAINER)) {

            if (receiver instanceof IPackageFragmentRoot) {
                IPackageFragmentRoot element = (IPackageFragmentRoot) receiver;
                try {
                    IClasspathEntry entry = element.getRawClasspathEntry();
                    if (entry.getPath().equals(PDECore.REQUIRED_PLUGINS_CONTAINER_PATH)) {
                        return true;
                    }
                } catch (JavaModelException e) {
                    return false;
                }
            }
        }
        return false;
    }

}