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package com.sun.enterprise.module.single;
import java.io.DataInputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.net.URLClassLoader;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.List;
import java.util.jar.Manifest;
import java.util.logging.Level;
import java.util.logging.Logger;
import com.sun.enterprise.module.ModuleDefinition;
import com.sun.enterprise.module.ModuleDependency;
import com.sun.enterprise.module.ModuleMetadata;
/**
* Creates a ModuleDefinition backed up by a a single classloader.
*
* <p/>
* The implementation does not cache any data - everything is recalculated
* for each call. Callers are therefore encouraged to either supply their
* own caching, or minimize the calls to methods of this class.
*
* @author Jerome Dochez
*/
public class ProxyModuleDefinition implements ModuleDefinition {
private final ClassLoader classLoader;
private final List<ManifestProxy.SeparatorMappings> mappings;
public ProxyModuleDefinition(ClassLoader classLoader) throws IOException {
this(classLoader, null);
}
public ProxyModuleDefinition(ClassLoader classLoader,
List<ManifestProxy.SeparatorMappings> mappings) throws IOException {
this.classLoader = classLoader;
this.mappings = mappings;
}
private static byte[] readFully(URL url) throws IOException {
DataInputStream dis = null;
try {
URLConnection con = url.openConnection();
int len = con.getContentLength();
InputStream in = con.getInputStream();
dis = new DataInputStream(in);
byte[] bytes = new byte[len];
dis.readFully(bytes);
return bytes;
} catch (IOException e) {
IOException x = new IOException("Failed to read " + url);
x.initCause(e);
throw x;
} finally {
if (dis != null) {
dis.close();
}
}
}
public String getName() {
return "Static Module";
}
public String[] getPublicInterfaces() {
return new String[0];
}
public ModuleDependency[] getDependencies() {
return new ModuleDependency[0];
}
public URI[] getLocations() {
List<URI> uris = new ArrayList<URI>();
if (classLoader instanceof URLClassLoader) {
URLClassLoader urlCL = (URLClassLoader) classLoader;
for (URL url : urlCL.getURLs()) {
try {
uris.add(url.toURI());
} catch (URISyntaxException e) {
Logger.getAnonymousLogger().log(Level.SEVERE, e.getMessage(), e);
}
}
} else {
String cp = System.getProperty("java.class.path");
if (ok(cp)) {
String[] paths = cp.split(System.getProperty("path.separator"));
if (ok(paths)) {
for (int i = 0; i < paths.length; i++) {
uris.add(new File(paths[i]).toURI());
}
}
}
}
return uris.toArray(new URI[uris.size()]);
}
public String getVersion() {
return "1.0.0";
}
public String getImportPolicyClassName() {
return null;
}
public String getLifecyclePolicyClassName() {
return null;
}
public Manifest getManifest() {
return generate(new ModuleMetadata());
}
public ModuleMetadata getMetadata() {
ModuleMetadata metadata = new ModuleMetadata();
generate(metadata);
return metadata;
}
protected Manifest generate(ModuleMetadata metadata) {
try {
Manifest manifest = new ManifestProxy(classLoader, mappings);
return manifest;
} catch (IOException e) {
throw new RuntimeException(e);
}
}
private static boolean ok(String s) {
return s != null && s.length() > 0;
}
private static boolean ok(String[] ss) {
return ss != null && ss.length > 0;
}
}