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/*
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* Copyright 1998-2008 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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package com.sun.tools.example.debug.gui;
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import java.io.*;
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import java.util.*;
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import com.sun.jdi.*;
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import com.sun.tools.example.debug.event.*;
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import com.sun.tools.example.debug.bdi.*;
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/**
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* Manage the list of source files.
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* Origin of SourceListener events.
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*/
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public class SourceManager {
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//### TODO: The source cache should be aged, and some cap
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//### put on memory consumption by source files loaded into core.
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private List<SourceModel> sourceList;
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private SearchPath sourcePath;
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private Vector<SourceListener> sourceListeners = new Vector<SourceListener>();
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private Map<ReferenceType, SourceModel> classToSource = new HashMap<ReferenceType, SourceModel>();
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private Environment env;
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/**
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* Hold on to it so it can be removed.
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*/
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private SMClassListener classListener = new SMClassListener();
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public SourceManager(Environment env) {
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this(env, new SearchPath(""));
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}
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public SourceManager(Environment env, SearchPath sourcePath) {
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this.env = env;
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this.sourceList = new LinkedList<SourceModel>();
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this.sourcePath = sourcePath;
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env.getExecutionManager().addJDIListener(classListener);
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}
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/**
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* Set path for access to source code.
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*/
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public void setSourcePath(SearchPath sp) {
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sourcePath = sp;
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// Old cached sources are now invalid.
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sourceList = new LinkedList<SourceModel>();
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notifySourcepathChanged();
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classToSource = new HashMap<ReferenceType, SourceModel>();
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}
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public void addSourceListener(SourceListener l) {
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sourceListeners.addElement(l);
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}
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public void removeSourceListener(SourceListener l) {
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sourceListeners.removeElement(l);
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}
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private void notifySourcepathChanged() {
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Vector l = (Vector)sourceListeners.clone();
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SourcepathChangedEvent evt = new SourcepathChangedEvent(this);
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for (int i = 0; i < l.size(); i++) {
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((SourceListener)l.elementAt(i)).sourcepathChanged(evt);
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}
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}
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/**
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* Get path for access to source code.
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*/
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public SearchPath getSourcePath() {
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return sourcePath;
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}
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/**
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* Get source object associated with a Location.
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*/
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public SourceModel sourceForLocation(Location loc) {
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return sourceForClass(loc.declaringType());
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}
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/**
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* Get source object associated with a class or interface.
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* Returns null if not available.
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*/
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public SourceModel sourceForClass(ReferenceType refType) {
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SourceModel sm = classToSource.get(refType);
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if (sm != null) {
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return sm;
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}
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try {
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String filename = refType.sourceName();
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String refName = refType.name();
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int iDot = refName.lastIndexOf('.');
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String pkgName = (iDot >= 0)? refName.substring(0, iDot+1) : "";
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String full = pkgName.replace('.', File.separatorChar) + filename;
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File path = sourcePath.resolve(full);
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if (path != null) {
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sm = sourceForFile(path);
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classToSource.put(refType, sm);
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return sm;
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}
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return null;
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} catch (AbsentInformationException e) {
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return null;
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}
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}
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/**
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* Get source object associated with an absolute file path.
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*/
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//### Use hash table for this?
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public SourceModel sourceForFile(File path) {
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Iterator<SourceModel> iter = sourceList.iterator();
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SourceModel sm = null;
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while (iter.hasNext()) {
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SourceModel candidate = iter.next();
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if (candidate.fileName().equals(path)) {
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sm = candidate;
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iter.remove(); // Will move to start of list.
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break;
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}
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}
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if (sm == null && path.exists()) {
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sm = new SourceModel(env, path);
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}
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if (sm != null) {
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// At start of list for faster access
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sourceList.add(0, sm);
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}
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return sm;
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}
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private class SMClassListener extends JDIAdapter
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implements JDIListener {
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public void classPrepare(ClassPrepareEventSet e) {
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ReferenceType refType = e.getReferenceType();
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SourceModel sm = sourceForClass(refType);
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if (sm != null) {
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sm.addClass(refType);
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}
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}
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public void classUnload(ClassUnloadEventSet e) {
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//### iterate through looking for (e.getTypeName()).
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//### then remove it.
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}
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}
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}
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