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/*******************************************************************************
* Copyright (c) 2003, 2015 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
* Sergey Prigogin (Google) - use parameterized types (bug 442021)
*******************************************************************************/
package org.eclipse.core.internal.runtime;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.*;
import org.eclipse.osgi.util.ManifestElement;
import org.osgi.framework.*;
/**
* This class can only be used if OSGi plugin is available.
*/
public class ResourceTranslator {
private static final String KEY_PREFIX = "%"; //$NON-NLS-1$
private static final String KEY_DOUBLE_PREFIX = "%%"; //$NON-NLS-1$
public static String getResourceString(Bundle bundle, String value) {
return getResourceString(bundle, value, null);
}
public static String getResourceString(Bundle bundle, String value, ResourceBundle resourceBundle) {
String s = value.trim();
if (!s.startsWith(KEY_PREFIX, 0))
return s;
if (s.startsWith(KEY_DOUBLE_PREFIX, 0))
return s.substring(1);
int ix = s.indexOf(' ');
String key = ix == -1 ? s : s.substring(0, ix);
String dflt = ix == -1 ? s : s.substring(ix + 1);
if (resourceBundle == null && bundle != null) {
try {
resourceBundle = getResourceBundle(bundle);
} catch (MissingResourceException e) {
// just return the default (dflt)
}
}
if (resourceBundle == null)
return dflt;
try {
return resourceBundle.getString(key.substring(1));
} catch (MissingResourceException e) {
//this will avoid requiring a bundle access on the next lookup
return dflt;
}
}
public static ResourceBundle getResourceBundle(Bundle bundle) throws MissingResourceException {
return getResourceBundle(bundle, null);
}
private static ResourceBundle getResourceBundle(Bundle bundle, String language) throws MissingResourceException {
if (hasRuntime21(bundle)) {
Locale locale = (language == null) ? Locale.getDefault() : new Locale(language);
return ResourceBundle.getBundle("plugin", locale, createTempClassloader(bundle)); //$NON-NLS-1$
}
return Activator.getDefault().getLocalization(bundle, language);
}
public static String[] getResourceString(Bundle bundle, String[] nonTranslated, String locale) {
if (bundle == null)
return nonTranslated;
ResourceBundle resourceBundle = null;
try {
resourceBundle = getResourceBundle(bundle, locale);
} catch (MissingResourceException e) {
// ignore - bug 371103
}
String[] translated = new String[nonTranslated.length];
for (int i = 0; i < nonTranslated.length; i++) {
translated[i] = getResourceString(bundle, nonTranslated[i], resourceBundle);
}
return translated;
}
private static boolean hasRuntime21(Bundle b) {
try {
ManifestElement[] prereqs = ManifestElement.parseHeader(Constants.REQUIRE_BUNDLE, b.getHeaders("").get(Constants.REQUIRE_BUNDLE)); //$NON-NLS-1$
if (prereqs == null)
return false;
for (int i = 0; i < prereqs.length; i++) {
if ("2.1".equals(prereqs[i].getAttribute(Constants.BUNDLE_VERSION_ATTRIBUTE)) && "org.eclipse.core.runtime".equals(prereqs[i].getValue())) { //$NON-NLS-1$//$NON-NLS-2$
return true;
}
}
} catch (BundleException e) {
return false;
}
return false;
}
private static ClassLoader createTempClassloader(Bundle b) {
ArrayList<URL> classpath = new ArrayList<>();
addClasspathEntries(b, classpath);
addBundleRoot(b, classpath);
addDevEntries(b, classpath);
addFragments(b, classpath);
URL[] urls = new URL[classpath.size()];
return new URLClassLoader(classpath.toArray(urls));
}
private static void addFragments(Bundle host, ArrayList<URL> classpath) {
Activator activator = Activator.getDefault();
if (activator == null)
return;
Bundle[] fragments = activator.getFragments(host);
if (fragments == null)
return;
for (int i = 0; i < fragments.length; i++) {
addClasspathEntries(fragments[i], classpath);
addDevEntries(fragments[i], classpath);
}
}
private static void addClasspathEntries(Bundle b, ArrayList<URL> classpath) {
ManifestElement[] classpathElements;
try {
classpathElements = ManifestElement.parseHeader(Constants.BUNDLE_CLASSPATH, b.getHeaders("").get(Constants.BUNDLE_CLASSPATH)); //$NON-NLS-1$
if (classpathElements == null)
return;
for (int i = 0; i < classpathElements.length; i++) {
URL classpathEntry = b.getEntry(classpathElements[i].getValue());
if (classpathEntry != null)
classpath.add(classpathEntry);
}
} catch (BundleException e) {
//ignore
}
}
private static void addBundleRoot(Bundle b, ArrayList<URL> classpath) {
classpath.add(b.getEntry("/")); //$NON-NLS-1$
}
private static void addDevEntries(Bundle b, ArrayList<URL> classpath) {
if (!DevClassPathHelper.inDevelopmentMode())
return;
String[] binaryPaths = DevClassPathHelper.getDevClassPath(b.getSymbolicName());
for (int i = 0; i < binaryPaths.length; i++) {
URL classpathEntry = b.getEntry(binaryPaths[i]);
if (classpathEntry != null)
classpath.add(classpathEntry);
}
}
}
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