org.jboss.modules.JDKPaths Maven / Gradle / Ivy
/*
* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* 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.jboss.modules;
import java.io.File;
import java.io.IOException;
import java.util.Collections;
import java.util.Enumeration;
import java.util.Set;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
/**
* A utility class which maintains the set of JDK paths. Makes certain assumptions about the disposition of the
* class loader used to load JBoss Modules; thus this class should only be used when booted up via the "-jar" or "-cp"
* switches.
*
* @author David M. Lloyd
* @author Richard Opalka
*/
final class JDKPaths {
static final Set JDK;
static {
final Set pathSet = JDKSpecific.getJDKPaths();
if (pathSet.size() == 0) throw new IllegalStateException("Something went wrong with system paths set up");
JDK = Collections.unmodifiableSet(pathSet);
}
private JDKPaths() {
}
static void processJar(final Set pathSet, final File file) throws IOException {
try (final ZipFile zipFile = new ZipFile(file)) {
final Enumeration entries = zipFile.entries();
while (entries.hasMoreElements()) {
final ZipEntry entry = entries.nextElement();
final String name = entry.getName();
final int lastSlash = name.lastIndexOf('/');
if (lastSlash != -1) {
pathSet.add(name.substring(0, lastSlash));
}
}
}
}
static void processClassPathItem(final String classPath, final Set jarSet, final Set pathSet) {
if (classPath == null) return;
int s = 0, e;
do {
e = classPath.indexOf(File.pathSeparatorChar, s);
String item = e == -1 ? classPath.substring(s) : classPath.substring(s, e);
if (! jarSet.contains(item)) {
final File file = new File(item);
if (file.isDirectory()) {
processDirectory(pathSet, file);
} else {
try {
processJar(pathSet, file);
} catch (IOException ex) {
// ignore
}
}
}
s = e + 1;
} while (e != -1);
}
static void processDirectory(final Set pathSet, final File file) {
for (File entry : file.listFiles()) {
if (entry.isDirectory()) {
processDirectory1(pathSet, entry, file.getPath());
} else {
final String parent = entry.getParent();
if (parent != null) pathSet.add(parent);
}
}
}
private static void processDirectory1(final Set pathSet, final File file, final String pathBase) {
for (File entry : file.listFiles()) {
if (entry.isDirectory()) {
processDirectory1(pathSet, entry, pathBase);
} else {
String packagePath = entry.getParent();
if (packagePath != null) {
packagePath = packagePath.substring(pathBase.length()).replace('\\', '/');
if(packagePath.startsWith("/")) {
packagePath = packagePath.substring(1);
}
pathSet.add(packagePath);
}
}
}
}
}