oracle.toplink.essentials.ejb.cmp3.persistence.URLArchive Maven / Gradle / Ivy
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package oracle.toplink.essentials.ejb.cmp3.persistence;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.Collections;
import java.util.Iterator;
/**
* This is an implementation of {@link Archive} when container returns a url
* that is not one of the familiar URL types like file or jar URLs. So, we can
* not recurssively walk thru' it's hierarchy. As a result {@link #getEntries()}
* returns an empty collection.
*
* @author [email protected]
*/
public class URLArchive implements Archive {
/*
* Implementation Note: This class does not have any dependency on TopLink
* or GlassFish implementation classes. Please retain this searation.
*/
/**
* The URL representation of this archive.
*/
private URL url;
public URLArchive(URL url) {
this.url = url;
}
public Iterator getEntries() {
return Collections.EMPTY_LIST.iterator();
}
public InputStream getEntry(String entryPath) throws IOException {
URL subEntry = new URL(url, entryPath);
InputStream is = null;
try {
is = subEntry.openStream();
} catch (IOException ioe) {
// we return null when entry does not exist
}
return is;
}
public URL getEntryAsURL(String entryPath) throws IOException {
URL subEntry = new URL(url, entryPath);
try {
InputStream is = subEntry.openStream();
is.close();
} catch (IOException ioe) {
return null; // return null when entry does not exist
}
return subEntry;
}
public URL getRootURL() {
return url;
}
}