1 /* 2 * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 /* 27 * This source code is provided to illustrate the usage of a given feature 28 * or technique and has been deliberately simplified. Additional steps 29 * required for a production-quality application, such as security checks, 30 * input validation and proper error handling, might not be present in 31 * this sample code. 32 */ 33 34 35 package com.sun.tools.example.debug.bdi; 36 37 import com.sun.jdi.*; 38 import java.util.List; 39 40 public class LineBreakpointSpec extends BreakpointSpec { 41 int lineNumber; 42 43 LineBreakpointSpec(EventRequestSpecList specs, 44 ReferenceTypeSpec refSpec, int lineNumber) { 45 super(specs, refSpec); 46 this.lineNumber = lineNumber; 47 } 48 49 /** 50 * The 'refType' is known to match. 51 */ 52 @Override 53 void resolve(ReferenceType refType) throws InvalidTypeException, 54 LineNotFoundException { 55 if (!(refType instanceof ClassType)) { 56 throw new InvalidTypeException(); 57 } 58 Location location = location((ClassType)refType); 59 setRequest(refType.virtualMachine().eventRequestManager() 60 .createBreakpointRequest(location)); 61 } 62 63 private Location location(ClassType clazz) throws 64 LineNotFoundException { 65 Location location = null; 66 try { 67 List<Location> locs = clazz.locationsOfLine(lineNumber()); 68 if (locs.size() == 0) { 69 throw new LineNotFoundException(); 70 } 71 // TODO handle multiple locations 72 location = locs.get(0); 73 if (location.method() == null) { 74 throw new LineNotFoundException(); 75 } 76 } catch (AbsentInformationException e) { 77 /* 78 * TO DO: throw something more specific, or allow 79 * AbsentInfo exception to pass through. 80 */ 81 throw new LineNotFoundException(); 82 } 83 return location; 84 } 85 86 public int lineNumber() { 87 return lineNumber; 88 } 89 90 @Override 91 public int hashCode() { 92 return refSpec.hashCode() + lineNumber; 93 } 94 95 @Override 96 public boolean equals(Object obj) { 97 if (obj instanceof LineBreakpointSpec) { 98 LineBreakpointSpec breakpoint = (LineBreakpointSpec)obj; 99 100 return refSpec.equals(breakpoint.refSpec) && 101 (lineNumber == breakpoint.lineNumber); 102 } else { 103 return false; 104 } 105 } 106 107 @Override 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 @Override 120 public String toString() { 121 StringBuilder sb = new StringBuilder("breakpoint "); 122 sb.append(refSpec.toString()); 123 sb.append(':'); 124 sb.append(lineNumber); 125 sb.append(" ("); 126 sb.append(getStatusString()); 127 sb.append(')'); 128 return sb.toString(); 129 } 130 }