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/*******************************************************************************
* Copyright (c) 2001, 2005 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.jem.internal.beaninfo.ui;
/*
*/
import org.eclipse.jdt.ui.StandardJavaElementContentProvider;
import org.eclipse.jdt.core.IPackageFragment;
import java.util.*;
/**
* A content provider which will only go down to the package level,
* it won't explore further. The advantage of this is so that plus signs ('+')
* won't show up on packages. The Filter technique could be used to not
* show the children, but this still shows the plus sign.
*
* Also, if the element is a java.util.List, then that list will be returned
* as the children. This allows for a root to be composed instead of being
* one of the standard Java Elements.
*/
public class PackageOnlyContentProvider extends StandardJavaElementContentProvider {
/**
* If the element is a list, return the iterator on it.
* Else send it up the chain.
*/
public Object[] getChildren(Object element) {
if (element instanceof List)
return ((List) element).toArray();
return super.getChildren(element);
}
/**
* If the element is a list and it is not empty, it has children,
* if it is a IPackageFragment it does not,
* else send it up the chain.
*/
public boolean hasChildren(Object element) {
if (element instanceof List)
return !((List) element).isEmpty();
if (element instanceof IPackageFragment)
return false;
return super.hasChildren(element);
}
}
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