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AspectJ tools most notably contains the AspectJ compiler (AJC). AJC applies aspects to Java classes during compilation, fully replacing Javac for plain Java classes and also compiling native AspectJ or annotation-based @AspectJ syntax. Furthermore, AJC can weave aspects into existing class files in a post-compile binary weaving step. This library is a superset of AspectJ weaver and hence also of AspectJ runtime.

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/* *******************************************************************
 * 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 v 2.0
 * which accompanies this distribution and is available at
 * https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.txt
 *
 * 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() {
		StringBuilder buf = new StringBuilder("");

		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;
	}
}