001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * https://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 */ 019package org.apache.commons.compress.harmony.unpack200.bytecode.forms; 020 021import org.apache.commons.compress.harmony.pack200.Pack200Exception; 022import org.apache.commons.compress.harmony.unpack200.bytecode.ByteCode; 023import org.apache.commons.compress.harmony.unpack200.bytecode.OperandManager; 024 025/** 026 * This class is used for representations of cldc and cldc_w. In these cases, a narrow class ref has one byte and a wide class ref has two bytes. 027 */ 028public class NarrowClassRefForm extends ClassRefForm { 029 030 /** 031 * Constructs a new instance with the specified opcode, name, operandType and rewrite. 032 * 033 * @param opcode index corresponding to the opcode's value. 034 * @param name String printable name of the opcode. 035 * @param rewrite Operand positions (which will later be rewritten in ByteCodes) are indicated by -1. 036 */ 037 public NarrowClassRefForm(final int opcode, final String name, final int[] rewrite) { 038 super(opcode, name, rewrite); 039 } 040 041 /** 042 * Constructs a new instance with the specified opcode, name, operandType and rewrite. 043 * 044 * @param opcode index corresponding to the opcode's value. 045 * @param name String printable name of the opcode. 046 * @param rewrite Operand positions (which will later be rewritten in ByteCodes) are indicated by -1. 047 * @param widened TODO. 048 */ 049 public NarrowClassRefForm(final int opcode, final String name, final int[] rewrite, final boolean widened) { 050 super(opcode, name, rewrite, widened); 051 } 052 053 @Override 054 public boolean nestedMustStartClassPool() { 055 return !widened; 056 } 057 058 @Override 059 protected void setNestedEntries(final ByteCode byteCode, final OperandManager operandManager, final int offset) throws Pack200Exception { 060 super.setNestedEntries(byteCode, operandManager, offset); 061 if (!widened) { 062 byteCode.setNestedPositions(new int[][] { { 0, 1 } }); 063 } 064 } 065}