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package com.sun.jersey.qe.tests.end2end;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.util.jar.Manifest;
import com.sun.jersey.spi.service.ServiceFinder;
/**
* @author Michal Gajdos (michal.gajdos at oracle.com)
*/
public class Helper {
private static final String MANIFEST = "META-INF/MANIFEST.MF";
private static final String MODULE_VERSION = "META-INF/jersey-module-version";
private Helper() {
}
public static Manifest getManifest(Class c) throws IOException {
String resource = c.getName().replace(".", "/") + ".class";
URL url = getResource(c.getClassLoader(), resource);
if (url == null)
throw new IOException("Resource not found: " + url);
return getManifest(resource, url);
}
public static String getJerseyModuleVersion(final Class<?> service) {
try {
final String serviceClassName = service.getName().replace(".", "/") + ".class";
URL moduleVersionURL = new URL(getResource(serviceClassName).toString().replace(serviceClassName, MODULE_VERSION));
return new BufferedReader(new InputStreamReader(moduleVersionURL.openStream())).readLine();
} catch (IOException ioe) {
return null;
}
}
private static URL getResource(ClassLoader loader, String name) throws IOException {
if (loader == null)
return getResource(name);
else {
final URL resource = loader.getResource(name);
if (resource != null) {
return resource;
} else {
return getResource(name);
}
}
}
private static Manifest getManifest(String name, URL serviceURL) throws IOException {
return getManifest(getManifestURL(name, serviceURL));
}
private static URL getManifestURL(String name, URL serviceURL) throws IOException {
return new URL(serviceURL.toString().replace(name, MANIFEST));
}
private static Manifest getManifest(URL url) throws IOException {
final InputStream in = url.openStream();
try {
return new Manifest(in);
} finally {
in.close();
}
}
private static URL getResource(String name) throws IOException {
if (ServiceFinder.class.getClassLoader() != null)
return ServiceFinder.class.getClassLoader().getResource(name);
else
return ClassLoader.getSystemResource(name);
}
}