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34
35 package com.sun.tools.example.debug.bdi;
36
37 import com.sun.jdi.*;
38 import com.sun.jdi.request.*;
39
40 import java.util.ArrayList  ;
41 import java.util.List ;
42 import java.util.Iterator ;
43
44 public class LineBreakpointSpec extends BreakpointSpec {
45 int lineNumber;
46
47 LineBreakpointSpec(EventRequestSpecList specs,
48 ReferenceTypeSpec refSpec, int lineNumber) {
49 super(specs, refSpec);
50 this.lineNumber = lineNumber;
51 }
52
53
56 void resolve(ReferenceType refType) throws InvalidTypeException,
57 LineNotFoundException {
58 if (!(refType instanceof ClassType)) {
59 throw new InvalidTypeException();
60 }
61 Location location = location((ClassType)refType);
62 setRequest(refType.virtualMachine().eventRequestManager()
63 .createBreakpointRequest(location));
64 }
65
66 private Location location(ClassType clazz) throws
67 LineNotFoundException {
68 Location location = null;
69 try {
70 List locs = clazz.locationsOfLine(lineNumber());
71 if (locs.size() == 0) {
72 throw new LineNotFoundException();
73 }
74 location = (Location)locs.get(0);
76 if (location.method() == null) {
77 throw new LineNotFoundException();
78 }
79 } catch (AbsentInformationException e) {
80
84 throw new LineNotFoundException();
85 }
86 return location;
87 }
88
89 public int lineNumber() {
90 return lineNumber;
91 }
92
93 public int hashCode() {
94 return refSpec.hashCode() + lineNumber;
95 }
96
97 public boolean equals(Object obj) {
98 if (obj instanceof LineBreakpointSpec) {
99 LineBreakpointSpec breakpoint = (LineBreakpointSpec)obj;
100
101 return refSpec.equals(breakpoint.refSpec) &&
102 (lineNumber == breakpoint.lineNumber);
103 } else {
104 return false;
105 }
106 }
107
108 public String errorMessageFor(Exception e) {
109 if (e instanceof LineNotFoundException) {
110 return ("No code at line " + lineNumber() + " in " + refSpec);
111 } else if (e instanceof InvalidTypeException) {
112 return ("Breakpoints can be located only in classes. " +
113 refSpec + " is an interface or array");
114 } else {
115 return super.errorMessageFor( e);
116 }
117 }
118
119 public String toString() {
120 StringBuffer buffer = new StringBuffer ("breakpoint ");
121 buffer.append(refSpec.toString());
122 buffer.append(':');
123 buffer.append(lineNumber);
124 buffer.append(" (");
125 buffer.append(getStatusString());
126 buffer.append(')');
127 return buffer.toString();
128 }
129 }
130 |
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Java API By Example, From Geeks To Geeks.