ValueExpression


1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    * 
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   * 
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  
18  package javax.el;
19  
20  /**
21   *
22   */
23  public abstract class ValueExpression extends Expression {
24  
25      public abstract Class  <?> getExpectedType();
26      
27      public abstract Class  <?> getType(ELContext context) throws NullPointerException  , PropertyNotFoundException, ELException;
28      
29      public abstract boolean isReadOnly(ELContext context) throws NullPointerException  , PropertyNotFoundException, ELException;
30      
31      public abstract void setValue(ELContext context, Object   value) throws NullPointerException  , PropertyNotFoundException, PropertyNotWritableException, ELException;
32      
33      public abstract Object   getValue(ELContext context) throws NullPointerException  , PropertyNotFoundException, ELException;
34  
35  }
36

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