/*
 * Copyright 2001-2004 The Apache Software Foundation.
 *
 * Licensed 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: AttributeSetMethodGenerator.java,v 1.5 2005/09/28 13:48:24 pvedula Exp $
 */

package com.sun.org.apache.xalan.internal.xsltc.compiler.util;

import com.sun.org.apache.bcel.internal.generic.ALOAD;
import com.sun.org.apache.bcel.internal.generic.ASTORE;
import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen;
import com.sun.org.apache.bcel.internal.generic.Instruction;
import com.sun.org.apache.bcel.internal.generic.InstructionList;
import com.sun.org.apache.bcel.internal.generic.Type;

/**
 * @author Santiago Pericas-Geertsen
 */
public final class AttributeSetMethodGenerator extends MethodGenerator {
    
    protected static final int CURRENT_INDEX  = 4;
    private static final int PARAM_START_INDEX = 5;

    private static final String[] argNames = new String[4];
    private static final com.sun.org.apache.bcel.internal.generic.Type[] argTypes = 
        new com.sun.org.apache.bcel.internal.generic.Type[4];
    
    static {
	argTypes[0] = Util.getJCRefType(DOM_INTF_SIG);
	argTypes[1] = Util.getJCRefType(NODE_ITERATOR_SIG);
	argTypes[2] = Util.getJCRefType(TRANSLET_OUTPUT_SIG);
	argTypes[3] = com.sun.org.apache.bcel.internal.generic.Type.INT;
	argNames[0] = DOCUMENT_PNAME;
	argNames[1] = ITERATOR_PNAME;
	argNames[2] = TRANSLET_OUTPUT_PNAME;
	argNames[3] = NODE_PNAME;
    }
	
   public AttributeSetMethodGenerator(String methodName, ClassGenerator classGen) {
	super(com.sun.org.apache.bcel.internal.Constants.ACC_PRIVATE,
	      com.sun.org.apache.bcel.internal.generic.Type.VOID,
	      argTypes, argNames, methodName, 
	      classGen.getClassName(),
	      new InstructionList(),
	      classGen.getConstantPool());
   }
   
    public int getLocalIndex(String name) {
	if (name.equals("current")) {
	    return CURRENT_INDEX;
	}
	return super.getLocalIndex(name);
    }

    public Instruction loadParameter(int index) {
        return new ALOAD(index + PARAM_START_INDEX);
    }
    
    public Instruction storeParameter(int index) {
        return new ASTORE(index + PARAM_START_INDEX);
    }
}