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 * 017 */ 018package org.apache.bcel.generic; 019 020import java.io.DataOutputStream; 021import java.io.IOException; 022 023import org.apache.bcel.util.ByteSequence; 024 025/** 026 * SIPUSH - Push short 027 * 028 * <PRE> 029 * Stack: ... -> ..., value 030 * </PRE> 031 * 032 */ 033public class SIPUSH extends Instruction implements ConstantPushInstruction { 034 035 private short b; 036 037 /** 038 * Empty constructor needed for Instruction.readInstruction. Not to be used otherwise. 039 */ 040 SIPUSH() { 041 } 042 043 public SIPUSH(final short b) { 044 super(org.apache.bcel.Const.SIPUSH, (short) 3); 045 this.b = b; 046 } 047 048 /** 049 * Call corresponding visitor method(s). The order is: Call visitor methods of implemented interfaces first, then call 050 * methods according to the class hierarchy in descending order, i.e., the most specific visitXXX() call comes last. 051 * 052 * @param v Visitor object 053 */ 054 @Override 055 public void accept(final Visitor v) { 056 v.visitPushInstruction(this); 057 v.visitStackProducer(this); 058 v.visitTypedInstruction(this); 059 v.visitConstantPushInstruction(this); 060 v.visitSIPUSH(this); 061 } 062 063 /** 064 * Dump instruction as short code to stream out. 065 */ 066 @Override 067 public void dump(final DataOutputStream out) throws IOException { 068 super.dump(out); 069 out.writeShort(b); 070 } 071 072 /** 073 * @return Type.SHORT 074 */ 075 @Override 076 public Type getType(final ConstantPoolGen cp) { 077 return Type.SHORT; 078 } 079 080 @Override 081 public Number getValue() { 082 return Integer.valueOf(b); 083 } 084 085 /** 086 * Read needed data (e.g. index) from file. 087 */ 088 @Override 089 protected void initFromFile(final ByteSequence bytes, final boolean wide) throws IOException { 090 super.setLength(3); 091 b = bytes.readShort(); 092 } 093 094 /** 095 * @return mnemonic for instruction 096 */ 097 @Override 098 public String toString(final boolean verbose) { 099 return super.toString(verbose) + " " + b; 100 } 101}