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/*******************************************************************************
* Copyright (c) 2000, 2003 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.core.variables;
import org.eclipse.core.runtime.CoreException;
/**
* A dynamic variable is a variable whose value is computed dynamically
* by a resolver at the time a string substitution is performed. A dynamic
* variable is contributed by an extension.
*
* The following is a definition of a dynamic variable that resolves to the name of the selected resource:
* <pre>
* <extension point="org.eclipse.core.variables.dynamicVariables">
* <variable
* name="resource_name"
* expanderClass="com.example.ResourceNameExpander"
* description="The name of the selected resource">
* </variable>
* </extension>
* </pre>
*
* @since 3.0
*/
public interface IDynamicVariable extends IStringVariable {
/**
* Returns the value of this variable when referenced with the given
* argument, possibly <code>null</code>.
*
* @param argument argument present in variable expression or <code>null</code>
* if none
* @return value of this variable when referenced with the given argument, possibly
* <code>null</code>
* @throws CoreException if unable to resolve a value for this variable
*/
public String getValue(String argument) throws CoreException;
}