/*
* Copyright (C) 2009 The Android Open Source Project
*
* 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 com.android.mkstubs;
import com.android.mkstubs.Main.Logger;
import org.objectweb.asm.ClassReader;
import java.io.IOException;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
/**
* Analyzes an input Jar to get all the relevant classes according to the given filter.
*
* This is mostly a helper extracted for convenience. Callers will want to use
* {@link #parseInputJar(String)} followed by {@link #filter(Map, Filter)}.
*/
class AsmAnalyzer {
/**
* Parses a JAR file and returns a list of all classes founds using a map
* class name => ASM ClassReader. Class names are in the form "android.view.View".
*/
Map parseInputJar(String inputJarPath) throws IOException {
TreeMap classes = new TreeMap();
ZipFile zip = new ZipFile(inputJarPath);
Enumeration extends ZipEntry> entries = zip.entries();
ZipEntry entry;
while (entries.hasMoreElements()) {
entry = entries.nextElement();
if (entry.getName().endsWith(".class")) {
ClassReader cr = new ClassReader(zip.getInputStream(entry));
String className = classReaderToAsmName(cr);
classes.put(className, cr);
}
}
return classes;
}
/**
* Utility that returns the fully qualified ASM class name for a ClassReader.
* E.g. it returns something like android/view/View.
*/
static String classReaderToAsmName(ClassReader classReader) {
if (classReader == null) {
return null;
} else {
return classReader.getClassName();
}
}
/**
* Filters the set of classes. Removes all classes that should not be included in the
* filter or that should be excluded. This modifies the map in-place.
*
* @param classes The in-out map of classes to examine and filter. The map is filtered
* in-place.
* @param filter A filter describing which classes to include and which ones to exclude.
* @param log
*/
void filter(Map classes, Filter filter, Logger log) {
Set keys = classes.keySet();
for(Iterator it = keys.iterator(); it.hasNext(); ) {
String key = it.next();
// TODO: We *could* filter out all private classes here: classes.get(key).getAccess().
// remove if we don't keep it
if (!filter.accept(key)) {
log.debug("- Remove class " + key);
it.remove();
}
}
}
}