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1   /*
2    * $Id: Lookup.java 18940 2010-08-11 15:50:38Z rossmason $
3    * --------------------------------------------------------------------------------------
4    * Copyright (c) MuleSoft, Inc.  All rights reserved.  http://www.mulesoft.com
5    *
6    * The software in this package is published under the terms of the CPAL v1.0
7    * license, a copy of which has been included with this distribution in the
8    * LICENSE.txt file.
9    */
10  
11  package org.mule.api.annotations.expressions;
12  
13  import org.mule.api.annotations.meta.Evaluator;
14  
15  import java.lang.annotation.Documented;
16  import java.lang.annotation.ElementType;
17  import java.lang.annotation.Retention;
18  import java.lang.annotation.RetentionPolicy;
19  import java.lang.annotation.Target;
20  
21  /**
22   * Allows objects to be found in the registry, either by ty
23   *
24   * @see org.mule.expression.FunctionExpressionEvaluator
25   */
26  @Target({ElementType.PARAMETER, ElementType.FIELD})
27  @Retention(RetentionPolicy.RUNTIME)
28  @Documented
29  @Evaluator("registry")
30  public @interface Lookup
31  {
32      String value() default "";
33  
34      boolean optional() default false;
35  }