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/*
* Copyright 2002-2004 Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package org.apache.tools.ant.taskdefs.optional.depend;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Vector;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import org.apache.tools.ant.util.depend.AbstractAnalyzer;
/**
* An analyzer which uses the depend task's bytecode classes to analyze
* dependencies
*
* @author Conor MacNeill
*/
public class AntAnalyzer extends AbstractAnalyzer {
/**
* Default constructor
*/
public AntAnalyzer() {
}
/**
* Determine the dependencies of the configured root classes.
*
* @param files a vector to be populated with the files which contain
* the dependency classes
* @param classes a vector to be populated with the names of the
* dependency classes.
*/
protected void determineDependencies(Vector files, Vector classes) {
// we get the root classes and build up a set of
// classes upon which they depend
Hashtable dependencies = new Hashtable();
Hashtable containers = new Hashtable();
Hashtable toAnalyze = new Hashtable();
for (Enumeration e = getRootClasses(); e.hasMoreElements();) {
String classname = (String) e.nextElement();
toAnalyze.put(classname, classname);
}
int count = 0;
int maxCount = isClosureRequired() ? MAX_LOOPS : 1;
Hashtable analyzedDeps = null;
while (toAnalyze.size() != 0 && count++ < maxCount) {
analyzedDeps = new Hashtable();
for (Enumeration e = toAnalyze.keys(); e.hasMoreElements();) {
String classname = (String) e.nextElement();
dependencies.put(classname, classname);
try {
File container = getClassContainer(classname);
if (container == null) {
continue;
}
containers.put(container, container);
ZipFile zipFile = null;
InputStream inStream = null;
try {
if (container.getName().endsWith(".class")) {
inStream = new FileInputStream(container.getPath());
} else {
zipFile = new ZipFile(container.getPath());
String entryName
= classname.replace('.', '/') + ".class";
ZipEntry entry = new ZipEntry(entryName);
inStream
= zipFile.getInputStream(entry);
}
ClassFile classFile = new ClassFile();
classFile.read(inStream);
Vector dependencyList = classFile.getClassRefs();
Enumeration depEnum = dependencyList.elements();
while (depEnum.hasMoreElements()) {
String dependency = (String) depEnum.nextElement();
analyzedDeps.put(dependency, dependency);
}
} finally {
if (inStream != null) {
inStream.close();
}
if (zipFile != null) {
zipFile.close();
}
}
} catch (IOException ioe) {
// ignore
}
}
toAnalyze.clear();
// now recover all the dependencies collected and add to the list.
Enumeration depsEnum = analyzedDeps.elements();
while (depsEnum.hasMoreElements()) {
String className = (String) depsEnum.nextElement();
if (!dependencies.containsKey(className)) {
toAnalyze.put(className, className);
}
}
}
// pick up the last round of dependencies that were determined
Enumeration depsEnum = analyzedDeps.elements();
while (depsEnum.hasMoreElements()) {
String className = (String) depsEnum.nextElement();
dependencies.put(className, className);
}
files.removeAllElements();
for (Enumeration e = containers.keys(); e.hasMoreElements();) {
files.addElement((File) e.nextElement());
}
classes.removeAllElements();
for (Enumeration e = dependencies.keys(); e.hasMoreElements();) {
classes.addElement((String) e.nextElement());
}
}
/**
* Indicate if this analyzer can determine dependent files.
*
* @return true if the analyzer provides dependency file information.
*/
protected boolean supportsFileDependencies() {
return true;
}
}
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