oracle.toplink.essentials.ejb.cmp3.persistence.DirectoryInsideJarURLArchive Maven / Gradle / Ivy
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package oracle.toplink.essentials.ejb.cmp3.persistence;
import java.net.URL;
import java.net.JarURLConnection;
import java.util.List;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.logging.Logger;
import java.util.logging.Level;
import java.util.jar.JarFile;
import java.util.jar.JarEntry;
import java.io.IOException;
import java.io.InputStream;
/**
* This is an implementation of {@link Archive} which is used when container
* returns a jar: URL. e.g. jar:file:/tmp/a_ear/b.war!/WEB-INF/classes/
*
* @author [email protected]
*/
public class DirectoryInsideJarURLArchive implements Archive {
/*
* Implementation Note: This class does not have any dependency on TopLink
* or GlassFish implementation classes. Please retain this searation.
*/
private JarFile jarFile;
// URL representation of this archive
private URL rootURL;
// distance from top of the JarFile to the entry
private String relativeRootPath;
private List entries = new ArrayList();
private Logger logger;
public DirectoryInsideJarURLArchive(URL url) throws IOException {
this(url, Logger.global);
}
public DirectoryInsideJarURLArchive(URL url, Logger logger)
throws IOException {
logger.entering("DirectoryInsideJarURLArchive", "DirectoryInsideJarURLArchive", // NOI18N
new Object[]{url});
this.logger = logger;
assert(url.getProtocol().equals("jar")); // NOI18N
rootURL = url;
JarURLConnection conn =
JarURLConnection.class.cast(url.openConnection());
jarFile = conn.getJarFile();
logger.logp(Level.FINER, "DirectoryInsideJarURLArchive",
"DirectoryInsideJarURLArchive", "jarFile = {0}", jarFile);
relativeRootPath = conn.getEntryName();
init();
}
private void init() {
for(Enumeration jarEntries = jarFile.entries();
jarEntries.hasMoreElements();) {
JarEntry jarEntry = jarEntries.nextElement();
if(jarEntry.isDirectory()) {
continue;
}
String jarEntryName = jarEntry.getName();
if (relativeRootPath==null) {
entries.add(jarEntryName);
} else if (jarEntryName.startsWith(relativeRootPath)) {
entries.add(jarEntryName.substring(relativeRootPath.length()));
}
}
}
public Iterator getEntries() {
return entries.iterator();
}
public InputStream getEntry(String entryPath) throws IOException {
InputStream is = entries.contains(entryPath) ?
jarFile.getInputStream(jarFile.getEntry(relativeRootPath + entryPath)) : null;
return is;
}
public URL getEntryAsURL(String entryPath) throws IOException {
URL result = entries.contains(entryPath) ?
new URL("jar:"+rootURL+"!/"+ relativeRootPath + entryPath) : null; // NOI18N
return result;
}
public URL getRootURL() {
return rootURL;
}
}