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/*
* JBoss, Home of Professional Open Source.
* Copyright 2010, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.modules;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.Closeable;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.MalformedURLException;
import java.net.URL;
import java.security.CodeSigner;
import java.security.CodeSource;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.jar.Manifest;
/**
*
* @author David M. Lloyd
*/
final class FileResourceLoader extends NativeLibraryResourceLoader {
private final String rootName;
private final Manifest manifest;
private final CodeSource codeSource;
FileResourceLoader(final String rootName, final File root) {
super(root);
if (root == null) {
throw new IllegalArgumentException("root is null");
}
if (rootName == null) {
throw new IllegalArgumentException("rootName is null");
}
this.rootName = rootName;
final File manifestFile = new File(root, "META-INF" + File.separatorChar + "MANIFEST.MF");
manifest = readManifestFile(manifestFile);
final URL rootUrl;
try {
rootUrl = root.getAbsoluteFile().toURI().toURL();
} catch (MalformedURLException e) {
throw new IllegalArgumentException("Invalid root file specified", e);
}
codeSource = new CodeSource(rootUrl, (CodeSigner[])null);
}
private static Manifest readManifestFile(final File manifestFile) {
try {
return new Manifest(new FileInputStream(manifestFile));
} catch (IOException e) {
return null;
}
}
public String getRootName() {
return rootName;
}
public ClassSpec getClassSpec(final String fileName) throws IOException {
final File file = new File(getRoot(), fileName);
if (! file.exists()) {
return null;
}
final long size = file.length();
final ClassSpec spec = new ClassSpec();
spec.setCodeSource(codeSource);
final InputStream is = new FileInputStream(file);
try {
if (size <= (long) Integer.MAX_VALUE) {
final int castSize = (int) size;
byte[] bytes = new byte[castSize];
int a = 0, res;
while ((res = is.read(bytes, a, castSize - a)) > 0) {
a += res;
}
// done
is.close();
spec.setBytes(bytes);
return spec;
} else {
throw new IOException("Resource is too large to be a valid class file");
}
} finally {
safeClose(is);
}
}
private static void safeClose(final Closeable closeable) {
if (closeable != null) try {
closeable.close();
} catch (IOException e) {
// ignore
}
}
public PackageSpec getPackageSpec(final String name) throws IOException {
return getPackageSpec(name, manifest, getRoot().toURI().toURL());
}
public Resource getResource(final String name) {
try {
final File file = new File(getRoot(), name);
if (! file.exists()) {
return null;
}
return new FileEntryResource(name, file, file.toURI().toURL());
} catch (MalformedURLException e) {
// must be invalid...? (todo: check this out)
return null;
}
}
public Collection getPaths() {
final List index = new ArrayList();
// First check for an index file
final File indexFile = new File(getRoot().getPath() + ".index");
if (indexFile.exists()) {
try {
final BufferedReader r = new BufferedReader(new InputStreamReader(new FileInputStream(indexFile)));
try {
String s;
while ((s = r.readLine()) != null) {
index.add(s.trim());
}
return index;
} finally {
// if exception is thrown, undo index creation
r.close();
}
} catch (IOException e) {
index.clear();
}
}
// Manually build index, starting with the root path
index.add("");
buildIndex(index, getRoot(), "");
if (ResourceLoaders.WRITE_INDEXES) {
// Now try to write it
boolean ok = false;
try {
final FileOutputStream fos = new FileOutputStream(indexFile);
try {
final OutputStreamWriter osw = new OutputStreamWriter(fos);
try {
final BufferedWriter writer = new BufferedWriter(osw);
try {
for (String name : index) {
writer.write(name);
writer.write('\n');
}
writer.close();
osw.close();
fos.close();
ok = true;
} finally {
safeClose(writer);
}
} finally {
safeClose(osw);
}
} finally {
safeClose(fos);
}
} catch (IOException e) {
// failed, ignore
} finally {
if (! ok) {
// well, we tried...
indexFile.delete();
}
}
}
return index;
}
private void buildIndex(final List index, final File root, final String pathBase) {
File[] files = root.listFiles();
if (files != null) for (File file : files) {
if (file.isDirectory()) {
index.add(pathBase + file.getName());
buildIndex(index, file, pathBase + file.getName() + "/");
}
}
}
}
