IVariableResolver


1   /*******************************************************************************
2    * Copyright (c) 2000, 2005 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.core.expressions;
12  
13  import org.eclipse.core.runtime.CoreException;
14  
15  /**
16   * A variable resolver can be used to add additional variable resolving
17   * strategies to an {@link EvaluationContext}.
18   * 
19   * @see org.eclipse.core.expressions.EvaluationContext#resolveVariable(String, Object[])
20   * 
21   * @since 3.0
22   */
23  public interface IVariableResolver {
24  
25      /**
26       * Resolves a variable for the given name and arguments. The
27       * handler is allowed to return <code>null</code> to indicate
28       * that it is not able to resolve the requested variable.
29       * 
30       * @param name the variable to resolve
31       * @param args an object array of arguments used to resolve the
32       *  variable
33       * @return the variable's value or <code>null</code> if no variable
34       *  could be resolved
35       * @exception CoreException if an errors occurs while resolving
36       *  the variable
37       */
38      public Object   resolve(String   name, Object  [] args) throws CoreException;
39  }
40

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