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1   /*
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: ParameterRef.java,v 1.2.4.1 2005/09/02 11:05:08 pvedula Exp $
22   */
23  
24  package com.sun.org.apache.xalan.internal.xsltc.compiler;
25  
26  import com.sun.org.apache.bcel.internal.generic.CHECKCAST;
27  import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen;
28  import com.sun.org.apache.bcel.internal.generic.GETFIELD;
29  import com.sun.org.apache.bcel.internal.generic.INVOKEINTERFACE;
30  import com.sun.org.apache.bcel.internal.generic.InstructionList;
31  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
32  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
33  import com.sun.org.apache.xalan.internal.xsltc.compiler.util.NodeSetType;
34  import com.sun.org.apache.xalan.internal.xsltc.runtime.BasisLibrary;
35  
36  /**
37   * @author Jacek Ambroziak
38   * @author Santiago Pericas-Geertsen
39   * @author Morten Jorgensen
40   * @author Erwin Bolwidt <ejb@klomp.org>
41   */
42  final class ParameterRef extends VariableRefBase {
43  
44      /**
45       * Name of param being referenced.
46       */
47      QName _name = null;
48  
49      public ParameterRef(Param param) {
50          super(param);
51          _name = param._name;
52  
53      }
54  
55      public String toString() {
56          return "parameter-ref("+_variable.getName()+'/'+_variable.getType()+')';
57      }
58  
59      public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
60          final ConstantPoolGen cpg = classGen.getConstantPool();
61          final InstructionList il = methodGen.getInstructionList();
62  
63          /*
64           * To fix bug 24518 related to setting parameters of the form
65           * {namespaceuri}localName, which will get mapped to an instance
66           * variable in the class.
67           */
68          final String name = BasisLibrary.mapQNameToJavaName (_name.toString());
69          final String signature = _type.toSignature();
70  
71          if (_variable.isLocal()) {
72              if (classGen.isExternal()) {
73                  Closure variableClosure = _closure;
74                  while (variableClosure != null) {
75                      if (variableClosure.inInnerClass()) break;
76                      variableClosure = variableClosure.getParentClosure();
77                  }
78  
79                  if (variableClosure != null) {
80                      il.append(ALOAD_0);
81                      il.append(new GETFIELD(
82                          cpg.addFieldref(variableClosure.getInnerClassName(),
83                              name, signature)));
84                  }
85                  else {
86                      il.append(_variable.loadInstruction());
87                  }
88              }
89              else {
90                  il.append(_variable.loadInstruction());
91              }
92          }
93          else {
94              final String className = classGen.getClassName();
95              il.append(classGen.loadTranslet());
96              if (classGen.isExternal()) {
97                  il.append(new CHECKCAST(cpg.addClass(className)));
98              }
99              il.append(new GETFIELD(cpg.addFieldref(className,name,signature)));
100         }
101 
102         if (_variable.getType() instanceof NodeSetType) {
103             // The method cloneIterator() also does resetting
104             final int clone = cpg.addInterfaceMethodref(NODE_ITERATOR,
105                                                        "cloneIterator",
106                                                        "()" +
107                                                         NODE_ITERATOR_SIG);
108             il.append(new INVOKEINTERFACE(clone, 1));
109         }
110     }
111 }