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/*******************************************************************************
* Copyright (c) 2005, 2017 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.osgi.internal.loader.classpath;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.security.ProtectionDomain;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.jar.Attributes;
import java.util.jar.Manifest;
import org.eclipse.osgi.container.Module;
import org.eclipse.osgi.framework.util.KeyedElement;
import org.eclipse.osgi.storage.BundleInfo;
import org.eclipse.osgi.storage.BundleInfo.Generation;
import org.eclipse.osgi.storage.Storage;
import org.eclipse.osgi.storage.bundlefile.BundleEntry;
import org.eclipse.osgi.storage.bundlefile.BundleFile;
/**
* A ClasspathEntry contains a single BundleFile which is used as
* a source to load classes and resources from, and a single
* ProtectionDomain which is used as the domain to define classes
* loaded from this ClasspathEntry.
* @since 3.2
*/
public class ClasspathEntry {
static final class PDEData {
final String fileName;
final String symbolicName;
PDEData(File baseFile, String symbolicName) {
this.fileName = baseFile == null ? null : baseFile.getAbsolutePath();
this.symbolicName = symbolicName;
}
}
private final BundleFile bundlefile;
private final ProtectionDomain domain;
private final ManifestPackageAttributes mainManifestPackageAttributes;
private final Map perPackageManifestAttributes;
private final List mrBundleFiles;
private HashMap userObjects = null;
// TODO Note that PDE has internal dependency on this field type/name (bug 267238)
@SuppressWarnings("unused")
private final PDEData data;
/**
* Constructs a ClasspathElement with the specified bundlefile and domain
* @param bundlefile A BundleFile object which acts as a source
* @param domain the protection domain
*/
public ClasspathEntry(BundleFile bundlefile, ProtectionDomain domain, Generation generation) {
this.bundlefile = bundlefile;
this.domain = domain;
this.data = new PDEData(generation.getBundleFile().getBaseFile(), generation.getRevision().getSymbolicName());
final Manifest manifest = loadManifest(bundlefile, generation);
if (manifest != null && generation.getBundleInfo().getStorage().getConfiguration().DEFINE_PACKAGE_ATTRIBUTES) {
mainManifestPackageAttributes = manifestPackageAttributesFor(manifest.getMainAttributes(), null);
perPackageManifestAttributes = manifestPackageAttributesMapFor(manifest.getEntries().entrySet(), mainManifestPackageAttributes);
} else {
mainManifestPackageAttributes = ManifestPackageAttributes.NONE;
perPackageManifestAttributes = null;
}
boolean isMRJar;
if (bundlefile == generation.getBundleFile()) {
// this is the root bundle file
isMRJar = generation.isMRJar();
} else {
isMRJar = manifest != null ? Boolean.parseBoolean(manifest.getMainAttributes().getValue(BundleInfo.MULTI_RELEASE_HEADER)) : false;
}
if (isMRJar) {
mrBundleFiles = getMRBundleFiles(bundlefile, generation);
} else {
mrBundleFiles = Collections.emptyList();
}
}
private static List getMRBundleFiles(BundleFile bundlefile, Generation generation) {
Storage storage = generation.getBundleInfo().getStorage();
if (storage.getRuntimeVersion().getMajor() < 9) {
return Collections.emptyList();
}
List mrBundleFiles = new ArrayList<>();
for (int i = storage.getRuntimeVersion().getMajor(); i > 8; i--) {
String versionPath = BundleInfo.MULTI_RELEASE_VERSIONS + i + '/';
BundleEntry versionEntry = bundlefile.getEntry(versionPath);
if (versionEntry != null) {
mrBundleFiles.add(storage.createNestedBundleFile(versionPath, bundlefile, generation, BundleInfo.MULTI_RELEASE_FILTER_PREFIXES));
}
}
return Collections.unmodifiableList(mrBundleFiles);
}
private static ManifestPackageAttributes manifestPackageAttributesFor(Attributes attributes, ManifestPackageAttributes defaultAttributes) {
return ManifestPackageAttributes.of(attributes.getValue(Attributes.Name.SPECIFICATION_TITLE), //
attributes.getValue(Attributes.Name.SPECIFICATION_VERSION), //
attributes.getValue(Attributes.Name.SPECIFICATION_VENDOR), //
attributes.getValue(Attributes.Name.IMPLEMENTATION_TITLE), //
attributes.getValue(Attributes.Name.IMPLEMENTATION_VERSION), //
attributes.getValue(Attributes.Name.IMPLEMENTATION_VENDOR), //
defaultAttributes);
}
private static Map manifestPackageAttributesMapFor(Set> entries, ManifestPackageAttributes defaultAttributes) {
Map result = null;
for (Entry entry : entries) {
String name = entry.getKey();
Attributes attributes = entry.getValue();
if (name != null && name.endsWith("/")) { //$NON-NLS-1$
String packageName = name.substring(0, name.length() - 1).replace('/', '.');
if (result == null) {
result = new HashMap<>(4);
}
result.put(packageName, manifestPackageAttributesFor(attributes, defaultAttributes));
}
}
return result;
}
/**
* Returns the source BundleFile for this classpath entry
* @return the source BundleFile for this classpath entry
*/
public BundleFile getBundleFile() {
return bundlefile;
}
/**
* Returns the ProtectionDomain for this classpath entry
* @return the ProtectionDomain for this classpath entry
*/
public ProtectionDomain getDomain() {
return domain;
}
/**
* Returns a user object which is keyed by the specified key
* @param key the key of the user object to get
* @return a user object which is keyed by the specified key
*/
public synchronized Object getUserObject(Object key) {
if (userObjects == null)
return null;
return userObjects.get(key);
}
/**
* Adds a user object
* @param userObject the user object to add
*/
public synchronized void addUserObject(KeyedElement userObject) {
if (userObjects == null)
userObjects = new HashMap<>(5);
if (!userObjects.containsKey(userObject.getKey())) {
userObjects.put(userObject.getKey(), userObject);
}
}
/**
* Finds the entry with the specified path.
* This handles Multi-Release searching also.
* @param path the path to find
* @return the entry with the specified path.
*/
public BundleEntry findEntry(String path) {
for (BundleFile mrFile : mrBundleFiles) {
BundleEntry mrEntry = mrFile.getEntry(path);
if (mrEntry != null) {
return mrEntry;
}
}
return bundlefile.getEntry(path);
}
/**
* Finds the resource wiht the specified name.
* This handles Multi-Release searching also.
* @param name the resource name
* @param m the module this classpath entry is for
* @param index the index this classpath entry.
* @return the resource URL or {@code null} if the resource does not exist.
*/
public URL findResource(String name, Module m, int index) {
for (BundleFile mrFile : mrBundleFiles) {
URL mrURL = mrFile.getResourceURL(name, m, index);
if (mrURL != null) {
return mrURL;
}
}
return bundlefile.getResourceURL(name, m, index);
}
/**
* Adds the BundleFile objects for this classpath in the proper order
* for searching for resources. This handles Multi-Release ordering also.
* @param bundlefiles
*/
public void addBundleFiles(List bundlefiles) {
bundlefiles.addAll(mrBundleFiles);
bundlefiles.add(bundlefile);
}
private static Manifest loadManifest(BundleFile cpBundleFile, Generation generation) {
if (!generation.hasPackageInfo() && generation.getBundleFile() == cpBundleFile) {
return null;
}
BundleEntry mfEntry = cpBundleFile.getEntry(BundleInfo.OSGI_BUNDLE_MANIFEST);
if (mfEntry != null) {
InputStream manIn = null;
try {
try {
manIn = mfEntry.getInputStream();
return new Manifest(manIn);
} finally {
if (manIn != null)
manIn.close();
}
} catch (IOException e) {
// do nothing
}
}
return null;
}
ManifestPackageAttributes manifestPackageAttributesFor(String packageName) {
ManifestPackageAttributes perPackage = perPackageManifestAttributes == null ? null : perPackageManifestAttributes.get(packageName);
if (perPackage != null) {
return perPackage;
}
return mainManifestPackageAttributes;
}
public void close() throws IOException {
bundlefile.close();
for (BundleFile bf : mrBundleFiles) {
bf.close();
}
}
}
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