| /******************************************************************************* |
| * Copyright (c) 2008 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: |
| * Wind River Systems - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.debug.internal.ui.actions.expressions; |
| |
| import org.eclipse.core.expressions.PropertyTester; |
| import org.eclipse.debug.core.DebugPlugin; |
| import org.eclipse.debug.core.model.IVariable; |
| import org.eclipse.debug.ui.actions.IWatchExpressionFactoryAdapter; |
| import org.eclipse.debug.ui.actions.IWatchExpressionFactoryAdapter2; |
| import org.eclipse.debug.ui.actions.IWatchExpressionFactoryAdapterExtension; |
| |
| /** |
| * This class is used to check whether a given element can be used to create |
| * a watch expression. A single property can be tested |
| * "canCreateWatchExpression". Test for this property ignores the value and |
| * always returns a boolean. |
| * |
| * @since 3.4 |
| */ |
| public class WatchExpressionFactoryTester extends PropertyTester { |
| |
| public static final String CAN_CREATE_WATCH_EXPRESSION_PROPERTY = "canCreateWatchExpression"; //$NON-NLS-1$ |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.core.expressions.PropertyTester#test(java.lang.Object, java.lang.String, java.lang.Object[], java.lang.Object) |
| */ |
| public boolean test(Object element, String property, Object[] args, Object expectedValue) { |
| if (CAN_CREATE_WATCH_EXPRESSION_PROPERTY.equals(property)){ |
| if (element instanceof IVariable) { |
| IVariable variable = (IVariable)element; |
| if (DebugPlugin.getDefault().getExpressionManager().hasWatchExpressionDelegate(variable.getModelIdentifier())) { |
| IWatchExpressionFactoryAdapter factory = WatchHandler.getFactory(variable); |
| if (factory instanceof IWatchExpressionFactoryAdapterExtension) { |
| IWatchExpressionFactoryAdapterExtension ext = (IWatchExpressionFactoryAdapterExtension) factory; |
| return ext.canCreateWatchExpression(variable); |
| } |
| return true; |
| } |
| } else { |
| IWatchExpressionFactoryAdapter2 factory2 = WatchHandler.getFactory2(element); |
| if (factory2 != null) { |
| return factory2.canCreateWatchExpression(element); |
| } |
| } |
| } |
| return false; |
| } |
| } |