| /******************************************************************************* |
| * Copyright (c) 2000, 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.debug.core.model; |
| |
| /** |
| * A delegate which computes the value of a watch expression |
| * when provided a context. Watch delegates are provided on a |
| * per debug model basis. Watch expressions query the appropriate |
| * delegate based on the debug model of the context element. |
| * Plug-ins that wish to contribute watch expression delegates may do so using the |
| * <code>org.eclipse.debug.core.watchExpressionDelegates</code> |
| * extension point. |
| * <p> |
| * For example, the following is the definition of a watch expression |
| * delegate for the com.example.foo plug-in: |
| * <pre> |
| * <extension point="org.eclipse.debug.core.watchExpressionDelegates"> |
| * <watchExpressionDelegate |
| * debugModel="org.eclipse.jdt.debug" |
| * delegateClass="org.eclipse.jdt.internal.debug.ui.JavaWatchExpressionDelegate"/> |
| * </extension> |
| * </pre> |
| * <p> |
| * Clients are intended to implement this interface. |
| * </p> |
| * @see org.eclipse.debug.core.model.IWatchExpression |
| * @see org.eclipse.debug.core.model.IWatchExpressionListener |
| * |
| * @since 3.0 |
| */ |
| public interface IWatchExpressionDelegate { |
| |
| /** |
| * Evaluates the given expression in the given context asynchronously and |
| * notifies the given listener when the evaluation finishes. |
| * |
| * @param expression the expression to evaluate |
| * @param context the context for the evaluation |
| * @param listener the listener to notify when the evaluation completes |
| */ |
| public void evaluateExpression(String expression, IDebugElement context, IWatchExpressionListener listener); |
| |
| } |
