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Java > Open Source Codes > edu > umd > cs > findbugs > CallSite


1 /*
2  * FindBugs - Find bugs in Java programs
3  * Copyright (C) 2003,2004 University of Maryland
4  *
5  * This library is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU Lesser General Public
7  * License as published by the Free Software Foundation; either
8  * version 2.1 of the License, or (at your option) any later version.
9  *
10  * This library is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13  * Lesser General Public License for more details.
14  *
15  * You should have received a copy of the GNU Lesser General Public
16  * License along with this library; if not, write to the Free Software
17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18  */
19
20 package edu.umd.cs.findbugs;
21
22 import org.apache.bcel.classfile.Method;
23 import org.apache.bcel.generic.InstructionHandle;
24
25 import edu.umd.cs.findbugs.ba.BasicBlock;
26 import edu.umd.cs.findbugs.ba.Location;
27
28 /**
29  * The site of a method call.
30  */
31 public class CallSite {
32     private final Method method;
33     private final Location location;
34
35     /**
36      * Constructor.
37      *
38      * @param method the method containing the call site
39      * @param basicBlock the basic block where the call site is located
40      * @param handle the instruction which performs the call
41      */
42     public CallSite(Method method, BasicBlock basicBlock, InstructionHandle handle) {
43         this.method = method;
44         this.location = new Location(handle, basicBlock);
45     }
46
47     /**
48      * Get the method containing the call site.
49      */
50     public Method getMethod() {
51         return method;
52     }
53
54     /**
55      * Get the Location (basic block and instruction) where the call site is located.
56      */
57     public Location getLocation() {
58         return location;
59     }
60
61     /**
62      * Get the basic block where the call site is located.
63      */
64     public BasicBlock getBasicBlock() {
65         return location.getBasicBlock();
66     }
67
68     /**
69      * Get the instruction which performs the call.
70      */
71     public InstructionHandle getHandle() {
72         return location.getHandle();
73     }
74
75     @Override JavaDoc
76     public int hashCode() {
77         return System.identityHashCode(method)
78                 ^ getBasicBlock().getId()
79                 ^ System.identityHashCode(location.getHandle());
80     }
81
82     @Override JavaDoc
83     public boolean equals(Object JavaDoc o) {
84         if (!(o instanceof CallSite))
85             return false;
86         CallSite other = (CallSite) o;
87         return method == other.method
88                 && getBasicBlock() == other.getBasicBlock()
89                 && getHandle() == other.getHandle();
90     }
91 }
92
93 // vim:ts=4
94
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