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Java > Open Source Codes > org > apache > bcel > generic > SIPUSH


1 /*
2  * Copyright 2000-2004 The Apache Software Foundation
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  *
16  */
17 package org.apache.bcel.generic;
18
19 import java.io.DataOutputStream JavaDoc;
20 import java.io.IOException JavaDoc;
21 import org.apache.bcel.util.ByteSequence;
22
23 /**
24  * SIPUSH - Push short
25  *
26  * <PRE>Stack: ... -&gt; ..., value</PRE>
27  *
28  * @version $Id: SIPUSH.java 386056 2006-03-15 11:31:56Z tcurdt $
29  * @author <A HREF="mailto:m.dahm@gmx.de">M. Dahm</A>
30  */
31 public class SIPUSH extends Instruction implements ConstantPushInstruction {
32
33     private short b;
34
35
36     /**
37      * Empty constructor needed for the Class.newInstance() statement in
38      * Instruction.readInstruction(). Not to be used otherwise.
39      */
40     SIPUSH() {
41     }
42
43
44     public SIPUSH(short b) {
45         super(org.apache.bcel.Constants.SIPUSH, (short) 3);
46         this.b = b;
47     }
48
49
50     /**
51      * Dump instruction as short code to stream out.
52      */
53     public void dump( DataOutputStream JavaDoc out ) throws IOException JavaDoc {
54         super.dump(out);
55         out.writeShort(b);
56     }
57
58
59     /**
60      * @return mnemonic for instruction
61      */
62     public String JavaDoc toString( boolean verbose ) {
63         return super.toString(verbose) + " " + b;
64     }
65
66
67     /**
68      * Read needed data (e.g. index) from file.
69      */
70     protected void initFromFile( ByteSequence bytes, boolean wide ) throws IOException JavaDoc {
71         length = 3;
72         b = bytes.readShort();
73     }
74
75
76     public Number JavaDoc getValue() {
77         return new Integer JavaDoc(b);
78     }
79
80
81     /** @return Type.SHORT
82      */
83     public Type getType( ConstantPoolGen cp ) {
84         return Type.SHORT;
85     }
86
87
88     /**
89      * Call corresponding visitor method(s). The order is:
90      * Call visitor methods of implemented interfaces first, then
91      * call methods according to the class hierarchy in descending order,
92      * i.e., the most specific visitXXX() call comes last.
93      *
94      * @param v Visitor object
95      */
96     public void accept( Visitor v ) {
97         v.visitPushInstruction(this);
98         v.visitStackProducer(this);
99         v.visitTypedInstruction(this);
100         v.visitConstantPushInstruction(this);
101         v.visitSIPUSH(this);
102     }
103 }
104
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