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.SegmentConstantPool; 023import org.apache.commons.compress.harmony.unpack200.bytecode.ByteCode; 024import org.apache.commons.compress.harmony.unpack200.bytecode.ClassFileEntry; 025import org.apache.commons.compress.harmony.unpack200.bytecode.OperandManager; 026 027/** 028 * Abstract superclass of all classes that have class-specific references to constant pool information. These classes have a context (a string representing a 029 * pack200 class) i.e., they send getClassSpecificPoolEntry instead of getConstantPoolEntry. 030 */ 031public abstract class ClassSpecificReferenceForm extends ReferenceForm { 032 033 /** 034 * Constructs a new instance with the specified opcode, name, operandType and rewrite. 035 * 036 * @param opcode index corresponding to the opcode's value. 037 * @param name String printable name of the opcode. 038 * @param rewrite Operand positions (which will later be rewritten in ByteCodes) are indicated by -1. 039 */ 040 public ClassSpecificReferenceForm(final int opcode, final String name, final int[] rewrite) { 041 super(opcode, name, rewrite); 042 } 043 044 protected abstract String context(OperandManager operandManager); 045 046 @Override 047 protected abstract int getOffset(OperandManager operandManager); 048 049 @Override 050 protected abstract int getPoolID(); 051 052 @Override 053 protected void setNestedEntries(final ByteCode byteCode, final OperandManager operandManager, final int offset) throws Pack200Exception { 054 final SegmentConstantPool globalPool = operandManager.globalConstantPool(); 055 final ClassFileEntry[] nested = { globalPool.getClassSpecificPoolEntry(getPoolID(), offset, context(operandManager)) }; 056 byteCode.setNested(nested); 057 byteCode.setNestedPositions(new int[][] { { 0, 2 } }); 058 } 059 060}