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Java > Open Source Codes > org > eclipse > debug > ui > actions > IWatchExpressionFactoryAdapterExtension


1 /*******************************************************************************
2  * Copyright (c) 2006 IBM Corporation and others.
3  * All rights reserved. This program and the accompanying materials
4  * are made available under the terms of the Eclipse Public License v1.0
5  * which accompanies this distribution, and is available at
6  * http://www.eclipse.org/legal/epl-v10.html
7  *
8  * Contributors:
9  * IBM Corporation - initial API and implementation
10  *******************************************************************************/
11 package org.eclipse.debug.ui.actions;
12
13 import org.eclipse.debug.core.model.IVariable;
14
15 /**
16  * Optional extension to the watch expression factory adapter to dynamically enable the
17  * 'Create Watch Expression' action, based on the selected variable.
18  * <p>
19  * By default, the 'Create Watch Expression' action is enabled for instances of
20  * {@link org.eclipse.debug.core.model.IVariable} that have an associated
21  * {@link org.eclipse.debug.core.model.IWatchExpressionDelegate} registered
22  * for that debug model.
23  * When a watch expression factory adapter is available for a variable that implements
24  * this interface, the factory is consulted to enable the action.
25  * </p>
26  * <p>
27  * Clients may implementing {@link IWatchExpressionFactoryAdapter} may also implement
28  * this interface.
29  * </p>
30  * @since 3.3
31  */
32 public interface IWatchExpressionFactoryAdapterExtension extends IWatchExpressionFactoryAdapter {
33     
34     /**
35      * Returns whether a watch expression can be created for the specified variable.
36      *
37      * @param variable variable a watch expression is required for
38      * @return whether an expression can be created
39      * @exception org.eclipse.core.runtime.CoreException if unable to create a watch
40      * expression
41      */
42     public boolean canCreateWatchExpression(IVariable variable);
43
44 }
45
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