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| 1 | +/* | |
| 2 | + * Copyright (c) 1998, 2008, 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 | +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 | + | |
| 35 | +/** | |
| 36 | + * Manage the list of source files. | |
| 37 | + * Origin of SourceListener events. | |
| 38 | + */ | |
| 39 | +public class SourceManager { | |
| 40 | + | |
| 41 | + //### TODO: The source cache should be aged, and some cap | |
| 42 | + //### put on memory consumption by source files loaded into core. | |
| 43 | + | |
| 44 | + private List<SourceModel> sourceList; | |
| 45 | + private SearchPath sourcePath; | |
| 46 | + | |
| 47 | + private ArrayList<SourceListener> sourceListeners = new ArrayList<SourceListener>(); | |
| 48 | + | |
| 49 | + private Map<ReferenceType, SourceModel> classToSource = new HashMap<ReferenceType, SourceModel>(); | |
| 50 | + | |
| 51 | + private Environment env; | |
| 52 | + | |
| 53 | + /** | |
| 54 | + * Hold on to it so it can be removed. | |
| 55 | + */ | |
| 56 | + private SMClassListener classListener = new SMClassListener(); | |
| 57 | + | |
| 58 | + public SourceManager(Environment env) { | |
| 59 | + this(env, new SearchPath("")); | |
| 60 | + } | |
| 61 | + | |
| 62 | + public SourceManager(Environment env, SearchPath sourcePath) { | |
| 63 | + this.env = env; | |
| 64 | + this.sourceList = new LinkedList<SourceModel>(); | |
| 65 | + this.sourcePath = sourcePath; | |
| 66 | + env.getExecutionManager().addJDIListener(classListener); | |
| 67 | + } | |
| 68 | + | |
| 69 | + /** | |
| 70 | + * Set path for access to source code. | |
| 71 | + */ | |
| 72 | + public void setSourcePath(SearchPath sp) { | |
| 73 | + sourcePath = sp; | |
| 74 | + // Old cached sources are now invalid. | |
| 75 | + sourceList = new LinkedList<SourceModel>(); | |
| 76 | + notifySourcepathChanged(); | |
| 77 | + classToSource = new HashMap<ReferenceType, SourceModel>(); | |
| 78 | + } | |
| 79 | + | |
| 80 | + public void addSourceListener(SourceListener l) { | |
| 81 | + sourceListeners.add(l); | |
| 82 | + } | |
| 83 | + | |
| 84 | + public void removeSourceListener(SourceListener l) { | |
| 85 | + sourceListeners.remove(l); | |
| 86 | + } | |
| 87 | + | |
| 88 | + private void notifySourcepathChanged() { | |
| 89 | + ArrayList<SourceListener> l = new ArrayList<SourceListener>(sourceListeners); | |
| 90 | + SourcepathChangedEvent evt = new SourcepathChangedEvent(this); | |
| 91 | + for (int i = 0; i < l.size(); i++) { | |
| 92 | + l.get(i).sourcepathChanged(evt); | |
| 93 | + } | |
| 94 | + } | |
| 95 | + | |
| 96 | + /** | |
| 97 | + * Get path for access to source code. | |
| 98 | + */ | |
| 99 | + public SearchPath getSourcePath() { | |
| 100 | + return sourcePath; | |
| 101 | + } | |
| 102 | + | |
| 103 | + /** | |
| 104 | + * Get source object associated with a Location. | |
| 105 | + */ | |
| 106 | + public SourceModel sourceForLocation(Location loc) { | |
| 107 | + return sourceForClass(loc.declaringType()); | |
| 108 | + } | |
| 109 | + | |
| 110 | + /** | |
| 111 | + * Get source object associated with a class or interface. | |
| 112 | + * Returns null if not available. | |
| 113 | + */ | |
| 114 | + public SourceModel sourceForClass(ReferenceType refType) { | |
| 115 | + SourceModel sm = classToSource.get(refType); | |
| 116 | + if (sm != null) { | |
| 117 | + return sm; | |
| 118 | + } | |
| 119 | + try { | |
| 120 | + String filename = refType.sourceName(); | |
| 121 | + String refName = refType.name(); | |
| 122 | + int iDot = refName.lastIndexOf('.'); | |
| 123 | + String pkgName = (iDot >= 0)? refName.substring(0, iDot+1) : ""; | |
| 124 | + String full = pkgName.replace('.', File.separatorChar) + filename; | |
| 125 | + File path = sourcePath.resolve(full); | |
| 126 | + if (path != null) { | |
| 127 | + sm = sourceForFile(path); | |
| 128 | + classToSource.put(refType, sm); | |
| 129 | + return sm; | |
| 130 | + } | |
| 131 | + return null; | |
| 132 | + } catch (AbsentInformationException e) { | |
| 133 | + return null; | |
| 134 | + } | |
| 135 | + } | |
| 136 | + | |
| 137 | + /** | |
| 138 | + * Get source object associated with an absolute file path. | |
| 139 | + */ | |
| 140 | + //### Use hash table for this? | |
| 141 | + public SourceModel sourceForFile(File path) { | |
| 142 | + Iterator<SourceModel> iter = sourceList.iterator(); | |
| 143 | + SourceModel sm = null; | |
| 144 | + while (iter.hasNext()) { | |
| 145 | + SourceModel candidate = iter.next(); | |
| 146 | + if (candidate.fileName().equals(path)) { | |
| 147 | + sm = candidate; | |
| 148 | + iter.remove(); // Will move to start of list. | |
| 149 | + break; | |
| 150 | + } | |
| 151 | + } | |
| 152 | + if (sm == null && path.exists()) { | |
| 153 | + sm = new SourceModel(env, path); | |
| 154 | + } | |
| 155 | + if (sm != null) { | |
| 156 | + // At start of list for faster access | |
| 157 | + sourceList.add(0, sm); | |
| 158 | + } | |
| 159 | + return sm; | |
| 160 | + } | |
| 161 | + | |
| 162 | + private class SMClassListener extends JDIAdapter | |
| 163 | + implements JDIListener { | |
| 164 | + | |
| 165 | + @Override | |
| 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 | + @Override | |
| 175 | + public void classUnload(ClassUnloadEventSet e) { | |
| 176 | + //### iterate through looking for (e.getTypeName()). | |
| 177 | + //### then remove it. | |
| 178 | + } | |
| 179 | + } | |
| 180 | +} | |