/*
* Copyright 2010 Henry Coles
*
* 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.pitest.classpath;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Enumeration;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import org.pitest.functional.Option;
import org.pitest.util.StreamUtil;
import org.pitest.util.Unchecked;
/**
* ClassPathRoot wrapping a jar or zip file
*/
public class ArchiveClassPathRoot implements ClassPathRoot {
private final File file;
public ArchiveClassPathRoot(final File file) {
this.file = file;
}
@Override
public InputStream getData(final String name) throws IOException {
final ZipFile zip = getRoot();
try {
final ZipEntry entry = zip.getEntry(name.replace('.', '/') + ".class");
if (entry == null) {
return null;
}
return StreamUtil.copyStream(zip.getInputStream(entry));
} finally {
zip.close(); // closes input stream
}
}
@Override
public URL getResource(final String name) throws MalformedURLException {
final ZipFile zip = getRoot();
try {
final ZipEntry entry = zip.getEntry(name);
if (entry != null) {
return new URL("jar:file:" + zip.getName() + "!/" + entry.getName());
} else {
return null;
}
} finally {
closeQuietly(zip);
}
}
private static void closeQuietly(final ZipFile zip) {
try {
zip.close();
} catch (final IOException e) {
throw Unchecked.translateCheckedException(e);
}
}
@Override
public String toString() {
return "ArchiveClassPathRoot [file=" + this.file.getName() + "]";
}
@Override
public Collection<String> classNames() {
final List<String> names = new ArrayList<String>();
final ZipFile root = getRoot();
try {
final Enumeration<? extends ZipEntry> entries = root.entries();
while (entries.hasMoreElements()) {
final ZipEntry entry = entries.nextElement();
if (!entry.isDirectory() && entry.getName().endsWith(".class")) {
names.add(stringToClassName(entry.getName()));
}
}
return names;
} finally {
closeQuietly(root);
}
}
private String stringToClassName(final String name) {
return name.substring(0, (name.length() - ".class".length())).replace('/',
'.');
}
@Override
public Option<String> cacheLocation() {
return Option.some(this.file.getAbsolutePath());
}
private ZipFile getRoot() {
try {
return new ZipFile(this.file);
} catch (final IOException ex) {
throw Unchecked.translateCheckedException(ex.getMessage() + " ("
+ this.file + ")", ex);
}
}
}