/*******************************************************************************
* Copyright (c) 2006 Sybase, Inc. 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:
* Sybase, Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.jst.jsf.common.ui.internal.dialogfield;
import org.eclipse.core.runtime.Assert;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerFilter;
/**
* Viewer filter used in selection dialogs.
*
* @author mengbo
* @version 1.5
*/
/*package*/ class TypedViewerFilter extends ViewerFilter {
private Class[] _fAcceptedTypes;
private Object[] _fRejectedElements;
/**
* Creates a filter that only allows elements of gives types.
*
* @param acceptedTypes
* The types of accepted elements
*/
public TypedViewerFilter(Class[] acceptedTypes) {
this(acceptedTypes, null);
}
/**
* Creates a filter that only allows elements of gives types, but not from a
* list of rejected elements.
*
* @param acceptedTypes
* Accepted elements must be of this types
* @param rejectedElements
* Element equals to the rejected elements are filtered out
*/
public TypedViewerFilter(Class[] acceptedTypes, Object[] rejectedElements) {
Assert.isNotNull(acceptedTypes);
_fAcceptedTypes = acceptedTypes;
_fRejectedElements = rejectedElements;
}
/**
* @see ViewerFilter#select(org.eclipse.jface.viewers.Viewer,
* java.lang.Object, java.lang.Object)
*/
public boolean select(Viewer viewer, Object parentElement, Object element) {
if (_fRejectedElements != null) {
for (int i = 0; i < _fRejectedElements.length; i++) {
if (element.equals(_fRejectedElements[i])) {
return false;
}
}
}
for (int i = 0; i < _fAcceptedTypes.length; i++) {
if (_fAcceptedTypes[i].isInstance(element)) {
return true;
}
}
return false;
}
}