| /* |
| * 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. |
| * |
| */ |
| package org.apache.tomcat.util.bcel.classfile; |
| |
| import java.io.DataInputStream; |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| |
| import org.apache.tomcat.util.bcel.Constants; |
| |
| /** |
| * This class represents colection of local variables in a |
| * method. This attribute is contained in the <em>Code</em> attribute. |
| * |
| * @version $Id: LocalVariableTable.java,v 1.1 2011/06/28 21:08:23 rherrmann Exp $ |
| * @author <A HREF="mailto:m.dahm@gmx.de">M. Dahm</A> |
| * @see Code |
| * @see LocalVariable |
| */ |
| public class LocalVariableTable extends Attribute { |
| |
| private static final long serialVersionUID = -3904314258294133920L; |
| private int local_variable_table_length; // Table of local |
| private LocalVariable[] local_variable_table; // variables |
| |
| |
| /** |
| * @param name_index Index in constant pool to `LocalVariableTable' |
| * @param length Content length in bytes |
| * @param local_variable_table Table of local variables |
| * @param constant_pool Array of constants |
| */ |
| public LocalVariableTable(int name_index, int length, LocalVariable[] local_variable_table, |
| ConstantPool constant_pool) { |
| super(Constants.ATTR_LOCAL_VARIABLE_TABLE, name_index, length, constant_pool); |
| setLocalVariableTable(local_variable_table); |
| } |
| |
| |
| /** |
| * Construct object from file stream. |
| * @param name_index Index in constant pool |
| * @param length Content length in bytes |
| * @param file Input stream |
| * @param constant_pool Array of constants |
| * @throws IOException |
| */ |
| LocalVariableTable(int name_index, int length, DataInputStream file, ConstantPool constant_pool) |
| throws IOException { |
| this(name_index, length, (LocalVariable[]) null, constant_pool); |
| local_variable_table_length = (file.readUnsignedShort()); |
| local_variable_table = new LocalVariable[local_variable_table_length]; |
| for (int i = 0; i < local_variable_table_length; i++) { |
| local_variable_table[i] = new LocalVariable(file, constant_pool); |
| } |
| } |
| |
| |
| /** |
| * Dump local variable table attribute to file stream in binary format. |
| * |
| * @param file Output file stream |
| * @throws IOException |
| */ |
| @Override |
| public final void dump( DataOutputStream file ) throws IOException { |
| super.dump(file); |
| file.writeShort(local_variable_table_length); |
| for (int i = 0; i < local_variable_table_length; i++) { |
| local_variable_table[i].dump(file); |
| } |
| } |
| |
| |
| /** |
| * |
| * @param index the variable slot |
| * |
| * @return the first LocalVariable that matches the slot or null if not found |
| * |
| * @deprecated since 5.2 because multiple variables can share the |
| * same slot, use getLocalVariable(int index, int pc) instead. |
| */ |
| public final LocalVariable getLocalVariable( int index ) { |
| for (int i = 0; i < local_variable_table_length; i++) { |
| if (local_variable_table[i].getIndex() == index) { |
| return local_variable_table[i]; |
| } |
| } |
| return null; |
| } |
| |
| public final void setLocalVariableTable( LocalVariable[] local_variable_table ) { |
| this.local_variable_table = local_variable_table; |
| local_variable_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_table_length; i++) { |
| buf.append(local_variable_table[i].toString()); |
| if (i < local_variable_table_length - 1) { |
| buf.append('\n'); |
| } |
| } |
| return buf.toString(); |
| } |
| |
| |
| /** |
| * @return deep copy of this attribute |
| */ |
| @Override |
| public Attribute copy( ConstantPool _constant_pool ) { |
| LocalVariableTable c = (LocalVariableTable) clone(); |
| c.local_variable_table = new LocalVariable[local_variable_table_length]; |
| for (int i = 0; i < local_variable_table_length; i++) { |
| c.local_variable_table[i] = local_variable_table[i].copy(); |
| } |
| c.constant_pool = _constant_pool; |
| return c; |
| } |
| |
| |
| } |