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2    * reserved comment block
3    * DO NOT REMOVE OR ALTER!
4    */
5   /*
6    * Copyright 2001-2004 The Apache Software Foundation.
7    *
8    * Licensed under the Apache License, Version 2.0 (the "License");
9    * you may not use this file except in compliance with the License.
10   * You may obtain a copy of the License at
11   *
12   *     http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing, software
15   * distributed under the License is distributed on an "AS IS" BASIS,
16   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17   * See the License for the specific language governing permissions and
18   * limitations under the License.
19   */
20  /*
21   * $Id: SimpleAttributeValue.java,v 1.2.4.1 2005/09/05 08:58:46 pvedula Exp $
22   */
23  
24  package com.sun.org.apache.xalan.internal.xsltc.compiler;
25  
26  import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen;
27  import com.sun.org.apache.bcel.internal.generic.InstructionList;
28  import com.sun.org.apache.bcel.internal.generic.PUSH;
29  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
30  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
31  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type;
32  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError;
33  
34  /**
35   * @author Jacek Ambroziak
36   * @author Santiago Pericas-Geertsen
37   */
38  final class SimpleAttributeValue extends AttributeValue {
39  
40      private String _value; // The attributes value (literate string).
41  
42      /**
43       * Creates a new simple attribute value.
44       * @param value the attribute value.
45       */
46      public SimpleAttributeValue(String value) {
47          _value = value;
48      }
49  
50      /**
51       * Returns this attribute value's type (String).
52       * @param stable The compiler/parser's symbol table
53       */
54      public Type typeCheck(SymbolTable stable) throws TypeCheckError {
55          return _type = Type.String;
56      }
57  
58      public String toString() {
59          return _value;
60      }
61  
62      protected boolean contextDependent() {
63          return false;
64      }
65  
66      /**
67       * Translate this attribute value into JVM bytecodes that pushes the
68       * attribute value onto the JVM's stack.
69       * @param classGen BCEL Java class generator
70       * @param methodGen BCEL Java method generator
71       */
72      public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
73          final ConstantPoolGen cpg = classGen.getConstantPool();
74          final InstructionList il = methodGen.getInstructionList();
75          il.append(new PUSH(cpg, _value));
76      }
77  }