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.CPClass; 023import org.apache.commons.compress.harmony.unpack200.bytecode.ClassFileEntry; 024import org.apache.commons.compress.harmony.unpack200.bytecode.OperandManager; 025 026/** 027 * This class is an extension of the ClassRefForm. It has two purposes: 1. To keep track of the last type used in a 028 * new() instruction in the current class. 2. To allow the sender to create instances of either a specified class (which 029 * then becomes the new class) or the last used new class. 030 */ 031public class NewClassRefForm extends ClassRefForm { 032 033 public NewClassRefForm(final int opcode, final String name, final int[] rewrite) { 034 super(opcode, name, rewrite); 035 } 036 037 /* 038 * (non-Javadoc) 039 * 040 * @see 041 * org.apache.commons.compress.harmony.unpack200.bytecode.forms.ReferenceForm#setByteCodeOperands(org.apache.commons 042 * .compress.harmony.unpack200.bytecode.ByteCode, 043 * org.apache.commons.compress.harmony.unpack200.bytecode.OperandManager) 044 */ 045 @Override 046 public void setByteCodeOperands(final ByteCode byteCode, final OperandManager operandManager, 047 final int codeLength) { 048 final int offset = getOffset(operandManager); 049 if (offset == 0) { 050 // Use current class 051 final SegmentConstantPool globalPool = operandManager.globalConstantPool(); 052 ClassFileEntry[] nested = new ClassFileEntry[] {globalPool.getClassPoolEntry(operandManager.getCurrentClass())}; 053 byteCode.setNested(nested); 054 byteCode.setNestedPositions(new int[][] {{0, 2}}); 055 } else { 056 // Look up the class in the classpool 057 try { 058 // Parent takes care of subtracting one from offset 059 // to adjust for 1-based global pool 060 setNestedEntries(byteCode, operandManager, offset); 061 } catch (final Pack200Exception ex) { 062 throw new Error("Got a pack200 exception. What to do?"); 063 } 064 } 065 operandManager.setNewClass(((CPClass) byteCode.getNestedClassFileEntries()[0]).getName()); 066 } 067}