code: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements. See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership. The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the  "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  /*
   * $Id$
   */
  
  package org.apache.xalan.xsltc.compiler;
  
  import org.apache.bcel.generic.CHECKCAST;
  import org.apache.bcel.generic.ConstantPoolGen;
  import org.apache.bcel.generic.GETFIELD;
  import org.apache.bcel.generic.INVOKEINTERFACE;
  import org.apache.bcel.generic.InstructionList;
  import org.apache.xalan.xsltc.compiler.util.ClassGenerator;
  import org.apache.xalan.xsltc.compiler.util.MethodGenerator;
  import org.apache.xalan.xsltc.compiler.util.NodeSetType;
  import org.apache.xalan.xsltc.runtime.BasisLibrary;
  
  /**
   * @author Jacek Ambroziak
   * @author Santiago Pericas-Geertsen
   * @author Morten Jorgensen
   * @author Erwin Bolwidt <ejb@klomp.org>
   */
  final class ParameterRef extends VariableRefBase {
  
      /**
       * Name of param being referenced.
       */
      QName _name = null;
      
      public ParameterRef(Param param) {
  	super(param);
          _name = param._name;
          
      }
  
      public String toString() {
  	return "parameter-ref("+_variable.getName()+'/'+_variable.getType()+')';
      }
  
      public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
  	final ConstantPoolGen cpg = classGen.getConstantPool();
  	final InstructionList il = methodGen.getInstructionList();
  
          /*
           * To fix bug 24518 related to setting parameters of the form
           * {namespaceuri}localName, which will get mapped to an instance 
           * variable in the class.
           */
          final String name = BasisLibrary.mapQNameToJavaName (_name.toString());
  	final String signature = _type.toSignature();
  
  	if (_variable.isLocal()) {
  	    if (classGen.isExternal()) {
  		Closure variableClosure = _closure;
  		while (variableClosure != null) {
  		    if (variableClosure.inInnerClass()) break;
  		    variableClosure = variableClosure.getParentClosure();
  		}
  	    
  		if (variableClosure != null) {
  		    il.append(ALOAD_0);
  		    il.append(new GETFIELD(
  			cpg.addFieldref(variableClosure.getInnerClassName(), 
  			    name, signature)));
  		}
  		else {
  		    il.append(_variable.loadInstruction());
  		}
  	    }
  	    else {
  		il.append(_variable.loadInstruction());
  	    }
  	}
  	else {
  	    final String className = classGen.getClassName();
  	    il.append(classGen.loadTranslet());
  	    if (classGen.isExternal()) {
  		il.append(new CHECKCAST(cpg.addClass(className)));
  	    }
  	    il.append(new GETFIELD(cpg.addFieldref(className,name,signature)));
  	}
  
  	if (_variable.getType() instanceof NodeSetType) {
  	    // The method cloneIterator() also does resetting
  	    final int clone = cpg.addInterfaceMethodref(NODE_ITERATOR,
  						       "cloneIterator",
  						       "()" + 
  							NODE_ITERATOR_SIG);
  	    il.append(new INVOKEINTERFACE(clone, 1));
  	}
      }
  }
  