| /******************************************************************************* |
| * Copyright (c) 2006, 2010 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.ui.internal.navigator.filters; |
| |
| import org.eclipse.core.expressions.EvaluationResult; |
| import org.eclipse.core.expressions.Expression; |
| import org.eclipse.core.expressions.IEvaluationContext; |
| import org.eclipse.jface.viewers.Viewer; |
| import org.eclipse.jface.viewers.ViewerFilter; |
| import org.eclipse.ui.internal.navigator.NavigatorPlugin; |
| |
| /** |
| * @since 3.2 |
| * |
| */ |
| public class CoreExpressionFilter extends ViewerFilter { |
| |
| private Expression filterExpression; |
| |
| /** |
| * Creates a filter which hides all elements that match the given |
| * expression. |
| * |
| * @param aFilterExpression |
| * An expression to hide elements in the viewer. |
| */ |
| public CoreExpressionFilter(Expression aFilterExpression) { |
| filterExpression = aFilterExpression; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.jface.viewers.ViewerFilter#select(org.eclipse.jface.viewers.Viewer, |
| * java.lang.Object, java.lang.Object) |
| */ |
| public boolean select(Viewer viewer, Object parentElement, Object element) { |
| |
| IEvaluationContext context = NavigatorPlugin.getEvalContext(element); |
| return NavigatorPlugin.safeEvaluate(filterExpression, context) != EvaluationResult.TRUE; |
| } |
| |
| } |