1 /*
   2  * reserved comment block
   3  * DO NOT REMOVE OR ALTER!
   4  */
   5 package com.sun.org.apache.bcel.internal.classfile;
   6 /**
   7  *  Licensed to the Apache Software Foundation (ASF) under one or more
   8  *  contributor license agreements.  See the NOTICE file distributed with
   9  *  this work for additional information regarding copyright ownership.
  10  *  The ASF licenses this file to You under the Apache License, Version 2.0
  11  *  (the "License"); you may not use this file except in compliance with
  12  *  the License.  You may obtain a copy of the License at
  13  *
  14  *     http://www.apache.org/licenses/LICENSE-2.0
  15  *
  16  *  Unless required by applicable law or agreed to in writing, software
  17  *  distributed under the License is distributed on an "AS IS" BASIS,
  18  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  19  *  See the License for the specific language governing permissions and
  20  *  limitations under the License.
  21  */
  22 
  23 import  com.sun.org.apache.bcel.internal.Constants;
  24 import  java.io.*;
  25 
  26 // The new table is used when generic types are about...
  27 
  28 //LocalVariableTable_attribute {
  29 //         u2 attribute_name_index;
  30 //         u4 attribute_length;
  31 //         u2 local_variable_table_length;
  32 //         {  u2 start_pc;
  33 //            u2 length;
  34 //            u2 name_index;
  35 //            u2 descriptor_index;
  36 //            u2 index;
  37 //         } local_variable_table[local_variable_table_length];
  38 //       }
  39 
  40 //LocalVariableTypeTable_attribute {
  41 //    u2 attribute_name_index;
  42 //    u4 attribute_length;
  43 //    u2 local_variable_type_table_length;
  44 //    { 
  45 //      u2 start_pc;
  46 //      u2 length;
  47 //      u2 name_index;
  48 //      u2 signature_index;
  49 //      u2 index;
  50 //    } local_variable_type_table[local_variable_type_table_length];
  51 //  }
  52 // J5TODO: Needs some testing !
  53 public class LocalVariableTypeTable extends Attribute {
  54   private static final long serialVersionUID = -1082157891095177114L;
  55 private int             local_variable_type_table_length; // Table of local
  56   private LocalVariable[] local_variable_type_table;        // variables
  57 
  58   public LocalVariableTypeTable(LocalVariableTypeTable c) {
  59     this(c.getNameIndex(), c.getLength(), c.getLocalVariableTypeTable(),
  60          c.getConstantPool());
  61   }
  62 
  63   public LocalVariableTypeTable(int name_index, int length,
  64                             LocalVariable[] local_variable_table,
  65                             ConstantPool    constant_pool)
  66   {
  67     super(Constants.ATTR_LOCAL_VARIABLE_TYPE_TABLE, name_index, length, constant_pool);
  68     setLocalVariableTable(local_variable_table);
  69   }    
  70 
  71   LocalVariableTypeTable(int nameIdx, int len, DataInputStream dis,ConstantPool cpool) throws IOException {
  72     this(nameIdx, len, (LocalVariable[])null, cpool);
  73 
  74     local_variable_type_table_length = (dis.readUnsignedShort());
  75     local_variable_type_table = new LocalVariable[local_variable_type_table_length];
  76 
  77     for(int i=0; i < local_variable_type_table_length; i++)
  78       local_variable_type_table[i] = new LocalVariable(dis, cpool);
  79   }
  80 
  81   @Override
  82 public void accept(Visitor v) {
  83     v.visitLocalVariableTypeTable(this);
  84   }
  85 
  86   @Override
  87 public final void dump(DataOutputStream file) throws IOException
  88   {
  89     super.dump(file);
  90     file.writeShort(local_variable_type_table_length);
  91     for(int i=0; i < local_variable_type_table_length; i++)
  92       local_variable_type_table[i].dump(file);
  93   }
  94 
  95   public final LocalVariable[] getLocalVariableTypeTable() {
  96     return local_variable_type_table;
  97   }    
  98 
  99   public final LocalVariable getLocalVariable(int index) {
 100     for(int i=0; i < local_variable_type_table_length; i++)
 101       if(local_variable_type_table[i].getIndex() == index)
 102         return local_variable_type_table[i];
 103 
 104     return null;
 105   }
 106 
 107   public final void setLocalVariableTable(LocalVariable[] local_variable_table)
 108   {
 109     this.local_variable_type_table = local_variable_table;
 110     local_variable_type_table_length = (local_variable_table == null)? 0 :
 111       local_variable_table.length;
 112   }
 113 
 114   /**
 115    * @return String representation.
 116    */ 
 117   @Override
 118 public final String toString() {
 119       StringBuilder buf = new StringBuilder();
 120 
 121     for(int i=0; i < local_variable_type_table_length; i++) {
 122       buf.append(local_variable_type_table[i].toString());
 123 
 124       if(i < local_variable_type_table_length - 1) buf.append('\n');
 125     }
 126 
 127     return buf.toString();
 128   }
 129 
 130   /**
 131    * @return deep copy of this attribute
 132    */
 133   @Override
 134 public Attribute copy(ConstantPool constant_pool) {
 135     LocalVariableTypeTable c = (LocalVariableTypeTable)clone();
 136 
 137     c.local_variable_type_table = new LocalVariable[local_variable_type_table_length];
 138     for(int i=0; i < local_variable_type_table_length; i++)
 139       c.local_variable_type_table[i] = local_variable_type_table[i].copy();
 140 
 141     c.constant_pool = constant_pool;
 142     return c;
 143   }
 144 
 145   public final int getTableLength() { return local_variable_type_table_length; }
 146 }