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/*******************************************************************************
* Copyright (c) 2000, 2004 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;
import org.eclipse.debug.core.DebugException;
/**
* The result of an evaluation performed by an
* <code>org.eclipse.debug.core.model.IWatchExpressionDelegate</code>.
* A watch expression reports the value of the evaluation
* and any errors or exceptions that occurred.
*
* @see org.eclipse.debug.core.model.IWatchExpressionDelegate
* @since 3.0
*/
public interface IWatchExpressionResult {
/**
* Returns the value representing the result of the
* evaluation, or <code>null</code> if the
* associated evaluation failed. If
* the associated evaluation failed, there will
* be problems, or an exception in this result.
*
* @return the resulting value, possibly
* <code>null</code>
*/
public IValue getValue();
/**
* Returns whether the evaluation had any problems
* or if an exception occurred while performing the
* evaluation.
*
* @return whether there were any problems.
* @see #getErrorMessages()
* @see #getException()
*/
public boolean hasErrors();
/**
* Returns an array of problem messages. Each message describes a problem that
* occurred while compiling the snippet.
*
* @return evaluation error messages, or an empty array if no errors occurred
*/
public String[] getErrorMessages();
/**
* Returns the expression that was evaluated.
*
* @return The string expression.
*/
public String getExpressionText();
/**
* Returns any exception that occurred while performing the evaluation
* or <code>null</code> if an exception did not occur.
* The exception will be a debug exception or a debug exception
* that wrappers a debug model specific exception that indicates a problem communicating
* with the target or with actually performing some action in the target.
*
* @return The exception that occurred during the evaluation
* @see org.eclipse.debug.core.DebugException
*/
public DebugException getException();
}
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