Mercurial > hg > openjdk > jdk9 > jaxp
view src/java.xml/share/classes/com/sun/org/apache/bcel/internal/classfile/LocalVariableTable.java @ 1113:2fdbfbde3bc0
8162572: Update License Header for all JAXP sources
Reviewed-by: lancea
author | joehw |
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date | Mon, 17 Apr 2017 16:24:10 -0700 |
parents | 2bfaf29cc90b |
children |
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/* * reserved comment block * DO NOT REMOVE OR ALTER! */ /* * 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 com.sun.org.apache.bcel.internal.classfile; import com.sun.org.apache.bcel.internal.Constants; import java.io.*; /** * This class represents colection of local variables in a * method. This attribute is contained in the <em>Code</em> attribute. * * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> * @see Code * @see LocalVariable */ public class LocalVariableTable extends Attribute { private int local_variable_table_length; // Table of local private LocalVariable[] local_variable_table; // variables /** * Initialize from another object. Note that both objects use the same * references (shallow copy). Use copy() for a physical copy. */ public LocalVariableTable(LocalVariableTable c) { this(c.getNameIndex(), c.getLength(), c.getLocalVariableTable(), c.getConstantPool()); } /** * @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); } /** * Called by objects that are traversing the nodes of the tree implicitely * defined by the contents of a Java class. I.e., the hierarchy of methods, * fields, attributes, etc. spawns a tree of objects. * * @param v Visitor object */ public void accept(Visitor v) { v.visitLocalVariableTable(this); } /** * Dump local variable table attribute to file stream in binary format. * * @param file Output file stream * @throws IOException */ 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); } /** * @return Array of local variables of method. */ public final LocalVariable[] getLocalVariableTable() { return local_variable_table; } /** @return first matching variable using index */ 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. */ 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 */ 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; } public final int getTableLength() { return local_variable_table_length; } }