ExpressionFactory


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   * @since 2.1
23   */
24  public abstract class ExpressionFactory {
25  
26      public abstract Object   coerceToType(Object   obj, Class  <?> expectedType)
27              throws ELException;
28  
29      public abstract ValueExpression createValueExpression(ELContext context,
30              String   expression, Class  <?> expectedType)
31              throws NullPointerException  , ELException;
32  
33      public abstract ValueExpression createValueExpression(Object   instance,
34              Class  <?> expectedType);
35  
36      public abstract MethodExpression createMethodExpression(ELContext context,
37              String   expression, Class  <?> expectedReturnType,
38              Class  <?>[] expectedParamTypes) throws ELException,
39              NullPointerException  ;
40  }
41
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