/* *******************************************************************
* Copyright (c) 2002 Palo Alto Research Center, Incorporated (PARC).
* All rights reserved.
* This program and the accompanying materials are made available
* under the terms of the Eclipse Public License v1.0
* which accompanies this distribution and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* PARC initial implementation
* ******************************************************************/
package org.aspectj.ajdt.internal.core.builder;
//import java.util.HashMap;
import java.io.File;
import java.io.IOException;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import org.aspectj.org.eclipse.jdt.core.compiler.CharOperation;
import org.aspectj.org.eclipse.jdt.internal.compiler.classfmt.ClassFileReader;
import org.aspectj.org.eclipse.jdt.internal.compiler.classfmt.ClassFormatException;
import org.aspectj.org.eclipse.jdt.internal.compiler.env.IBinaryType;
import org.aspectj.org.eclipse.jdt.internal.compiler.env.INameEnvironment;
import org.aspectj.org.eclipse.jdt.internal.compiler.env.NameEnvironmentAnswer;
import org.aspectj.util.FileUtil;
public class StatefulNameEnvironment implements INameEnvironment {
private Map classesFromName;
private Map inflatedClassFilesCache;
private Set packageNames;
private AjState state;
private INameEnvironment baseEnvironment;
public StatefulNameEnvironment(INameEnvironment baseEnvironment, Map classesFromName, AjState state) {
this.classesFromName = classesFromName;
this.inflatedClassFilesCache = new HashMap();
this.baseEnvironment = baseEnvironment;
this.state = state;
packageNames = new HashSet();
for (Iterator i = classesFromName.keySet().iterator(); i.hasNext();) {
String className = (String) i.next();
addAllPackageNames(className);
}
// System.err.println(packageNames);
}
private void addAllPackageNames(String className) {
int dot = className.indexOf('.');
while (dot != -1) {
packageNames.add(className.substring(0, dot));
dot = className.indexOf('.', dot + 1);
}
}
public void cleanup() {
baseEnvironment.cleanup();
this.classesFromName = Collections.EMPTY_MAP;
this.packageNames.clear();// = Collections.EMPTY_SET;
}
private NameEnvironmentAnswer findType(String name) {
// pr133532 - ask the state for the type first
IBinaryType seenOnPreviousBuild = state.checkPreviousBuild(name);
if (seenOnPreviousBuild != null) {
return new NameEnvironmentAnswer(seenOnPreviousBuild, null);
}
if (this.inflatedClassFilesCache.containsKey(name)) {
return (NameEnvironmentAnswer) this.inflatedClassFilesCache.get(name);
} else {
File fileOnDisk = (File) classesFromName.get(name);
// System.err.println("find: " + name + " found: " + cf);
if (fileOnDisk == null)
return null;
try {
// System.out.println("from cache: " + name);
byte[] bytes = FileUtil.readAsByteArray(fileOnDisk);
NameEnvironmentAnswer ret = new NameEnvironmentAnswer(new ClassFileReader(bytes, fileOnDisk.getAbsolutePath()
.toCharArray()), null /* no access restriction */);
this.inflatedClassFilesCache.put(name, ret);
return ret;
} catch (ClassFormatException e) {
return null; // !!! seems to match FileSystem behavior
} catch (IOException ex) {
return null; // see above...
}
}
}
public NameEnvironmentAnswer findType(char[] typeName, char[][] packageName) {
NameEnvironmentAnswer ret = findType(new String(CharOperation.concatWith(packageName, typeName, '.')));
if (ret != null)
return ret;
return baseEnvironment.findType(typeName, packageName);
}
public NameEnvironmentAnswer findType(char[][] compoundName) {
NameEnvironmentAnswer ret = findType(new String(CharOperation.concatWith(compoundName, '.')));
if (ret != null)
return ret;
return baseEnvironment.findType(compoundName);
}
public boolean isPackage(char[][] parentPackageName, char[] packageName) {
if (baseEnvironment.isPackage(parentPackageName, packageName))
return true;
String fullPackageName = new String(CharOperation.concatWith(parentPackageName, packageName, '.'));
return packageNames.contains(fullPackageName);
}
/**
* Needs to be told about changes. The 'added' set is a subset of classNameToFileMap consisting of just those names added during
* this build - to reduce any impact on incremental compilation times.
*/
public void update(Map classNameToFileMap, Set added) {
for (Iterator i = added.iterator(); i.hasNext();) {
String className = (String) i.next();
addAllPackageNames(className);
}
this.classesFromName = classNameToFileMap;
}
}