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/*******************************************************************************
* Copyright (c) 2007 Oracle. 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:
* Oracle - initial API and implementation
******************************************************************************/
package org.eclipse.jpt.utility.internal.node;
/**
* Define an interface describing the problems associated with a node.
*/
public interface Problem {
/**
* Return the node most closely associated with the problem.
*/
Node source();
/**
* Return a key that can be used to uniquely identify the problem's message.
*/
String messageKey();
/**
* Return the arguments associate with the problem's message.
*/
Object[] messageArguments();
/**
* Return whether the problem is equal to the specified object.
* It is equal if the specified object is a implementation of the
* Problem interface and its source, message key, and message
* arguments are all equal to this problem's.
*/
boolean equals(Object o);
/**
* Return the problem's hash code, which should calculated as an
* XOR of the source's hash code and the message key's hash code.
*/
int hashCode();
}
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