J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1998-1999 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package com.sun.tools.example.debug.gui; |
| 27 | |
| 28 | import java.io.*; |
| 29 | import java.util.*; |
| 30 | |
| 31 | import com.sun.jdi.*; |
| 32 | |
| 33 | import com.sun.tools.example.debug.event.*; |
| 34 | import com.sun.tools.example.debug.bdi.*; |
| 35 | |
| 36 | /** |
| 37 | * Manage the list of source files. |
| 38 | * Origin of SourceListener events. |
| 39 | */ |
| 40 | public class SourceManager { |
| 41 | |
| 42 | //### TODO: The source cache should be aged, and some cap |
| 43 | //### put on memory consumption by source files loaded into core. |
| 44 | |
| 45 | private List<SourceModel> sourceList; |
| 46 | private SearchPath sourcePath; |
| 47 | |
| 48 | private Vector<SourceListener> sourceListeners = new Vector<SourceListener>(); |
| 49 | |
| 50 | private Map<ReferenceType, SourceModel> classToSource = new HashMap<ReferenceType, SourceModel>(); |
| 51 | |
| 52 | private Environment env; |
| 53 | |
| 54 | /** |
| 55 | * Hold on to it so it can be removed. |
| 56 | */ |
| 57 | private SMClassListener classListener = new SMClassListener(); |
| 58 | |
| 59 | public SourceManager(Environment env) { |
| 60 | this(env, new SearchPath("")); |
| 61 | } |
| 62 | |
| 63 | public SourceManager(Environment env, SearchPath sourcePath) { |
| 64 | this.env = env; |
| 65 | this.sourceList = new LinkedList<SourceModel>(); |
| 66 | this.sourcePath = sourcePath; |
| 67 | env.getExecutionManager().addJDIListener(classListener); |
| 68 | } |
| 69 | |
| 70 | /** |
| 71 | * Set path for access to source code. |
| 72 | */ |
| 73 | public void setSourcePath(SearchPath sp) { |
| 74 | sourcePath = sp; |
| 75 | // Old cached sources are now invalid. |
| 76 | sourceList = new LinkedList<SourceModel>(); |
| 77 | notifySourcepathChanged(); |
| 78 | classToSource = new HashMap<ReferenceType, SourceModel>(); |
| 79 | } |
| 80 | |
| 81 | public void addSourceListener(SourceListener l) { |
| 82 | sourceListeners.addElement(l); |
| 83 | } |
| 84 | |
| 85 | public void removeSourceListener(SourceListener l) { |
| 86 | sourceListeners.removeElement(l); |
| 87 | } |
| 88 | |
| 89 | private void notifySourcepathChanged() { |
| 90 | Vector l = (Vector)sourceListeners.clone(); |
| 91 | SourcepathChangedEvent evt = new SourcepathChangedEvent(this); |
| 92 | for (int i = 0; i < l.size(); i++) { |
| 93 | ((SourceListener)l.elementAt(i)).sourcepathChanged(evt); |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | /** |
| 98 | * Get path for access to source code. |
| 99 | */ |
| 100 | public SearchPath getSourcePath() { |
| 101 | return sourcePath; |
| 102 | } |
| 103 | |
| 104 | /** |
| 105 | * Get source object associated with a Location. |
| 106 | */ |
| 107 | public SourceModel sourceForLocation(Location loc) { |
| 108 | return sourceForClass(loc.declaringType()); |
| 109 | } |
| 110 | |
| 111 | /** |
| 112 | * Get source object associated with a class or interface. |
| 113 | * Returns null if not available. |
| 114 | */ |
| 115 | public SourceModel sourceForClass(ReferenceType refType) { |
| 116 | SourceModel sm = (SourceModel)classToSource.get(refType); |
| 117 | if (sm != null) { |
| 118 | return sm; |
| 119 | } |
| 120 | try { |
| 121 | String filename = refType.sourceName(); |
| 122 | String refName = refType.name(); |
| 123 | int iDot = refName.lastIndexOf('.'); |
| 124 | String pkgName = (iDot >= 0)? refName.substring(0, iDot+1) : ""; |
| 125 | String full = pkgName.replace('.', File.separatorChar) + filename; |
| 126 | File path = sourcePath.resolve(full); |
| 127 | if (path != null) { |
| 128 | sm = sourceForFile(path); |
| 129 | classToSource.put(refType, sm); |
| 130 | return sm; |
| 131 | } |
| 132 | return null; |
| 133 | } catch (AbsentInformationException e) { |
| 134 | return null; |
| 135 | } |
| 136 | } |
| 137 | |
| 138 | /** |
| 139 | * Get source object associated with an absolute file path. |
| 140 | */ |
| 141 | //### Use hash table for this? |
| 142 | public SourceModel sourceForFile(File path) { |
| 143 | Iterator iter = sourceList.iterator(); |
| 144 | SourceModel sm = null; |
| 145 | while (iter.hasNext()) { |
| 146 | SourceModel candidate = (SourceModel)iter.next(); |
| 147 | if (candidate.fileName().equals(path)) { |
| 148 | sm = candidate; |
| 149 | iter.remove(); // Will move to start of list. |
| 150 | break; |
| 151 | } |
| 152 | } |
| 153 | if (sm == null && path.exists()) { |
| 154 | sm = new SourceModel(env, path); |
| 155 | } |
| 156 | if (sm != null) { |
| 157 | // At start of list for faster access |
| 158 | sourceList.add(0, sm); |
| 159 | } |
| 160 | return sm; |
| 161 | } |
| 162 | |
| 163 | private class SMClassListener extends JDIAdapter |
| 164 | implements JDIListener { |
| 165 | |
| 166 | public void classPrepare(ClassPrepareEventSet e) { |
| 167 | ReferenceType refType = e.getReferenceType(); |
| 168 | SourceModel sm = sourceForClass(refType); |
| 169 | if (sm != null) { |
| 170 | sm.addClass(refType); |
| 171 | } |
| 172 | } |
| 173 | |
| 174 | public void classUnload(ClassUnloadEventSet e) { |
| 175 | //### iterate through looking for (e.getTypeName()). |
| 176 | //### then remove it. |
| 177 | } |
| 178 | } |
| 179 | } |