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Java > Open Source Codes > soot > jimple > internal > JGotoStmt


1 /* Soot - a J*va Optimization Framework
2  * Copyright (C) 1999 Patrick Lam
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * This library is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with this library; if not, write to the
16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17  * Boston, MA 02111-1307, USA.
18  */
19
20 /*
21  * Modified by the Sable Research Group and others 1997-1999.
22  * See the 'credits' file distributed with Soot for the complete list of
23  * contributors. (Soot is distributed at http://www.sable.mcgill.ca/soot)
24  */
25
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30
31 package soot.jimple.internal;
32
33 import soot.tagkit.*;
34 import soot.*;
35 import soot.jimple.*;
36 import soot.baf.*;
37 import soot.jimple.*;
38 import soot.util.*;
39 import java.util.*;
40
41 public class JGotoStmt extends AbstractStmt implements GotoStmt
42 {
43     UnitBox targetBox;
44
45     List targetBoxes;
46
47     public JGotoStmt(Unit target)
48     {
49         this(Jimple.v().newStmtBox(target));
50     }
51
52     public JGotoStmt(UnitBox box)
53     {
54         this.targetBox = box;
55
56         targetBoxes = new ArrayList();
57         targetBoxes.add(this.targetBox);
58         targetBoxes = Collections.unmodifiableList(targetBoxes);
59     }
60
61     public Object JavaDoc clone()
62     {
63         return new JGotoStmt(getTarget());
64     }
65
66     public String JavaDoc toString()
67     {
68         Unit t = getTarget();
69         String JavaDoc target = "(branch)";
70         if(!t.branches())
71             target = t.toString();
72         return Jimple.v().GOTO + " [?= " + target + "]";
73     }
74     
75     public void toString(UnitPrinter up) {
76         up.literal(Jimple.v().GOTO);
77         up.literal(" ");
78         targetBox.toString(up);
79     }
80     
81     public Unit getTarget()
82     {
83         return targetBox.getUnit();
84     }
85
86     public void setTarget(Unit target)
87     {
88         targetBox.setUnit(target);
89     }
90
91     public UnitBox getTargetBox()
92     {
93         return targetBox;
94     }
95
96     public List getUnitBoxes()
97     {
98         return targetBoxes;
99     }
100
101     public void apply(Switch sw)
102     {
103         ((StmtSwitch) sw).caseGotoStmt(this);
104     }
105     
106     public void convertToBaf(JimpleToBafContext context, List out)
107     {
108     Unit u;
109         out.add(u = Baf.v().newGotoInst(Baf.v().newPlaceholderInst(getTarget())));
110
111     Iterator it = getTags().iterator();
112     while(it.hasNext()) {
113         u.addTag((Tag) it.next());
114     }
115     }
116     
117     public boolean fallsThrough(){return false;}
118     public boolean branches() { return true;}
119     
120 }
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