SettableExpression


1   /*
2    * Copyright 2002-2006 the original author or authors.
3    * 
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    * 
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    * 
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  package org.springframework.binding.expression;
17  
18  /**
19   * An evaluator that is capable of setting a value on a target object at the
20   * path defined by this expression.
21   * @author Keith Donald
22   */
23  public interface SettableExpression extends Expression {
24  
25      /**
26       * Evaluate this expression against the target object to set its value to
27       * the value provided.
28       * @param target the target object
29       * @param value the new value to be set
30       * @param context the evaluation context
31       * @throws EvaluationException an exception occured during evaluation.
32       */
33      public void evaluateToSet(Object   target, Object   value, EvaluationContext context) throws EvaluationException;
34  }

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