001 /*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements. See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership. The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the "License");
007 * you may not use this file except in compliance with the License.
008 * You may obtain a copy of the License at
009 *
010 * http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018 /*
019 * $Id: ParameterRef.java 528589 2007-04-13 18:50:56Z zongaro $
020 */
021
022 package org.apache.xalan.xsltc.compiler;
023
024 import org.apache.bcel.generic.CHECKCAST;
025 import org.apache.bcel.generic.ConstantPoolGen;
026 import org.apache.bcel.generic.GETFIELD;
027 import org.apache.bcel.generic.INVOKEINTERFACE;
028 import org.apache.bcel.generic.InstructionList;
029 import org.apache.xalan.xsltc.compiler.util.ClassGenerator;
030 import org.apache.xalan.xsltc.compiler.util.MethodGenerator;
031 import org.apache.xalan.xsltc.compiler.util.NodeSetType;
032 import org.apache.xalan.xsltc.runtime.BasisLibrary;
033
034 /**
035 * @author Jacek Ambroziak
036 * @author Santiago Pericas-Geertsen
037 * @author Morten Jorgensen
038 * @author Erwin Bolwidt <ejb@klomp.org>
039 */
040 final class ParameterRef extends VariableRefBase {
041
042 /**
043 * Name of param being referenced.
044 */
045 QName _name = null;
046
047 public ParameterRef(Param param) {
048 super(param);
049 _name = param._name;
050
051 }
052
053 public String toString() {
054 return "parameter-ref("+_variable.getName()+'/'+_variable.getType()+')';
055 }
056
057 public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
058 final ConstantPoolGen cpg = classGen.getConstantPool();
059 final InstructionList il = methodGen.getInstructionList();
060
061 /*
062 * To fix bug 24518 related to setting parameters of the form
063 * {namespaceuri}localName, which will get mapped to an instance
064 * variable in the class.
065 */
066 final String name = BasisLibrary.mapQNameToJavaName (_name.toString());
067 final String signature = _type.toSignature();
068
069 if (_variable.isLocal()) {
070 if (classGen.isExternal()) {
071 Closure variableClosure = _closure;
072 while (variableClosure != null) {
073 if (variableClosure.inInnerClass()) break;
074 variableClosure = variableClosure.getParentClosure();
075 }
076
077 if (variableClosure != null) {
078 il.append(ALOAD_0);
079 il.append(new GETFIELD(
080 cpg.addFieldref(variableClosure.getInnerClassName(),
081 name, signature)));
082 }
083 else {
084 il.append(_variable.loadInstruction());
085 }
086 }
087 else {
088 il.append(_variable.loadInstruction());
089 }
090 }
091 else {
092 final String className = classGen.getClassName();
093 il.append(classGen.loadTranslet());
094 if (classGen.isExternal()) {
095 il.append(new CHECKCAST(cpg.addClass(className)));
096 }
097 il.append(new GETFIELD(cpg.addFieldref(className,name,signature)));
098 }
099
100 if (_variable.getType() instanceof NodeSetType) {
101 // The method cloneIterator() also does resetting
102 final int clone = cpg.addInterfaceMethodref(NODE_ITERATOR,
103 "cloneIterator",
104 "()" +
105 NODE_ITERATOR_SIG);
106 il.append(new INVOKEINTERFACE(clone, 1));
107 }
108 }
109 }