/* *******************************************************************
 * Copyright (c) 2004 IBM Corporation
 * 
 * All rights reserved. 
 * This program and the accompanying materials are made available 
 * under the terms of the Eclipse Public License v1.0 
 * which accompanies this distribution and is available at 
 * http://www.eclipse.org/legal/epl-v10.html 
 *  
 * Contributors: 
 *    Andy Clement     initial implementation 
 *    Heavily based on LocalVariableTable
 * ******************************************************************/
package org.aspectj.apache.bcel.classfile;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;

import org.aspectj.apache.bcel.Constants;

// The new table is used when generic types are about...

//LocalVariableTable_attribute {
//	   u2 attribute_name_index;
//	   u4 attribute_length;
//	   u2 local_variable_table_length;
//	   {  u2 start_pc;
//	      u2 length;
//	      u2 name_index;
//	      u2 descriptor_index;
//	      u2 index;
//	   } local_variable_table[local_variable_table_length];
//	 }

//LocalVariableTypeTable_attribute {
//    u2 attribute_name_index;
//    u4 attribute_length;
//    u2 local_variable_type_table_length;
//    { 
//      u2 start_pc;
//      u2 length;
//      u2 name_index;
//      u2 signature_index;
//      u2 index;
//    } local_variable_type_table[local_variable_type_table_length];
//  }
// J5TODO: Needs some testing !
public class LocalVariableTypeTable extends Attribute {
	private int local_variable_type_table_length; // Table of local
	private LocalVariable[] local_variable_type_table; // variables

	public LocalVariableTypeTable(LocalVariableTypeTable c) {
		this(c.getNameIndex(), c.getLength(), c.getLocalVariableTypeTable(), c.getConstantPool());
	}

	public LocalVariableTypeTable(int name_index, int length, LocalVariable[] local_variable_table, ConstantPool constant_pool) {
		super(Constants.ATTR_LOCAL_VARIABLE_TYPE_TABLE, name_index, length, constant_pool);
		setLocalVariableTable(local_variable_table);
	}

	LocalVariableTypeTable(int nameIdx, int len, DataInputStream dis, ConstantPool cpool) throws IOException {
		this(nameIdx, len, (LocalVariable[]) null, cpool);

		local_variable_type_table_length = (dis.readUnsignedShort());
		local_variable_type_table = new LocalVariable[local_variable_type_table_length];

		for (int i = 0; i < local_variable_type_table_length; i++)
			local_variable_type_table[i] = new LocalVariable(dis, cpool);
	}

	@Override
	public void accept(ClassVisitor v) {
		v.visitLocalVariableTypeTable(this);
	}

	@Override
	public final void dump(DataOutputStream file) throws IOException {
		super.dump(file);
		file.writeShort(local_variable_type_table_length);
		for (int i = 0; i < local_variable_type_table_length; i++)
			local_variable_type_table[i].dump(file);
	}

	public final LocalVariable[] getLocalVariableTypeTable() {
		return local_variable_type_table;
	}

	public final LocalVariable getLocalVariable(int index) {
		for (int i = 0; i < local_variable_type_table_length; i++)
			if (local_variable_type_table[i].getIndex() == index)
				return local_variable_type_table[i];

		return null;
	}

	public final void setLocalVariableTable(LocalVariable[] local_variable_table) {
		this.local_variable_type_table = local_variable_table;
		local_variable_type_table_length = (local_variable_table == null) ? 0 : local_variable_table.length;
	}

	/**
	 * @return String representation.
	 */
	@Override
	public final String toString() {
		StringBuffer buf = new StringBuffer("");

		for (int i = 0; i < local_variable_type_table_length; i++) {
			buf.append(local_variable_type_table[i].toString());

			if (i < local_variable_type_table_length - 1)
				buf.append('\n');
		}

		return buf.toString();
	}

	// /**
	// * @return deep copy of this attribute
	// */
	// public Attribute copy(ConstantPool constant_pool) {
	// LocalVariableTypeTable c = (LocalVariableTypeTable)clone();
	//
	// c.local_variable_type_table = new LocalVariable[local_variable_type_table_length];
	// for(int i=0; i < local_variable_type_table_length; i++)
	// c.local_variable_type_table[i] = local_variable_type_table[i].copy();
	//
	// c.cpool = constant_pool;
	// return c;
	// }

	public final int getTableLength() {
		return local_variable_type_table_length;
	}
}
