cvs commit: jakarta-commons-sandbox/jexl/src/java/org/apache/commons/jexl JexlExprResolver.java

[ge...@apache.org]

geirm       2002/06/13 09:09:33

  Added:       jexl/src/java/org/apache/commons/jexl JexlExprResolver.java
  Log:
  interface for custom expression resolvers
  
  Revision  Changes    Path
  1.1                  jakarta-commons-sandbox/jexl/src/java/org/apache/commons/jexl/JexlExprResolver.java
  
  Index: JexlExprResolver.java
  ===================================================================
  package org.apache.commons.jexl;
  
  /**
   *  A Resolver allows custom resolution of the expression, and can be
   *  added in front of the jexl engine, or after in the evaluation
   *
   *  @author <a href="mailto:geirm@adeptra.com">Geir Magnusson Jr.</a>
   *  @version $Id: JexlExprResolver.java,v 1.1 2002/06/13 16:09:32 geirm Exp $
   */
  public interface JexlExprResolver
  {
      public static final Object NO_VALUE = new Object();
  
      /**
       *  evaluates an expression against the context
       *
       *  @param context current data context
       *  @param expression expression to evauluate
       *  @return value (may be null) po the NO_VALUE object to
       *       indicate no resolution.
       */
      Object evaluate(JexlContext context, String expression);
  }
  
  
  

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