001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.commons.compress.harmony.unpack200.bytecode.forms; 018 019import org.apache.commons.compress.harmony.pack200.Pack200Exception; 020import org.apache.commons.compress.harmony.unpack200.SegmentConstantPool; 021import org.apache.commons.compress.harmony.unpack200.bytecode.ByteCode; 022import org.apache.commons.compress.harmony.unpack200.bytecode.ClassFileEntry; 023import org.apache.commons.compress.harmony.unpack200.bytecode.OperandManager; 024 025/** 026 * This class implements the byte code form for those bytecodes which have string references (and only string references). 027 */ 028public class StringRefForm extends SingleByteReferenceForm { 029 030 public StringRefForm(final int opcode, final String name, final int[] rewrite) { 031 super(opcode, name, rewrite); 032 } 033 034 public StringRefForm(final int opcode, final String name, final int[] rewrite, final boolean widened) { 035 this(opcode, name, rewrite); 036 this.widened = widened; 037 } 038 039 @Override 040 protected int getOffset(final OperandManager operandManager) { 041 return operandManager.nextStringRef(); 042 } 043 044 @Override 045 protected int getPoolID() { 046 return SegmentConstantPool.CP_STRING; 047 } 048 049 @Override 050 protected void setNestedEntries(final ByteCode byteCode, final OperandManager operandManager, final int offset) throws Pack200Exception { 051 final SegmentConstantPool globalPool = operandManager.globalConstantPool(); 052 final ClassFileEntry[] nested = { globalPool.getValue(getPoolID(), offset) }; 053 byteCode.setNested(nested); 054 if (widened) { 055 byteCode.setNestedPositions(new int[][] { { 0, 2 } }); 056 } else { 057 byteCode.setNestedPositions(new int[][] { { 0, 1 } }); 058 } 059 } 060}