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package com.sun.jersey.samples.atomserver.resources;
import com.sun.syndication.feed.WireFeed;
import com.sun.syndication.feed.atom.Entry;
import com.sun.syndication.feed.atom.Feed;
import com.sun.syndication.feed.atom.Link;
import com.sun.syndication.io.FeedException;
import com.sun.syndication.io.WireFeedInput;
import com.sun.jersey.api.NotFoundException;
import com.sun.jersey.spi.MessageBodyWorkers;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.URI;
import java.util.Date;
import java.util.List;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.ext.MessageBodyWriter;
/**
*
* @author Paul.Sandoz@Sun.Com
*/
class AtomStore {
private static final MediaType atomMediaType = new MediaType("application", "atom+xml");
static String getCollectionPath() {
return "collection";
}
static String getFeedPath() {
return "collection/feed.xml";
}
static String getPath(String id) {
return "collection/" + id;
}
static String getEntryPath(String id) {
return getPath(id) + "/entry.xml";
}
static String getMediaPath(String id) {
return getPath(id) + "/media";
}
static boolean hasMedia(String id) {
String p = getMediaPath(id);
return FileStore.FS.exists(p);
}
static void checkExistence(String path) {
if (!FileStore.FS.exists(path))
throw new NotFoundException("Entry does not exist");
}
static Feed getFeedDocument() throws FeedException {
InputStream in = null;
synchronized(FileStore.FS) {
in = FileStore.FS.getFileContents(AtomStore.getFeedPath());
}
WireFeedInput input = new WireFeedInput();
WireFeed wireFeed = input.build(new InputStreamReader(in));
return (Feed)wireFeed;
}
static Feed getFeedDocument(MessageBodyWorkers bodyContext, URI feedUri) throws IOException, FeedException {
InputStream in = null;
synchronized(FileStore.FS) {
in = FileStore.FS.getFileContents(AtomStore.getFeedPath());
if (in == null) {
in = createDefaultFeedDocument(bodyContext, feedUri.toString());
}
}
WireFeedInput input = new WireFeedInput();
WireFeed wireFeed = input.build(new InputStreamReader(in));
return (Feed)wireFeed;
}
static void updateFeedDocumentWithNewEntry(MessageBodyWorkers bodyContext,
Feed f, Entry e) throws IOException {
f.getEntries().add(e);
updateFeedDocument(bodyContext, f);
}
static void updateFeedDocumentRemovingEntry(MessageBodyWorkers bodyContext,
Feed f, String id) throws IOException {
Entry e = findEntry(id, f);
f.getEntries().remove(e);
updateFeedDocument(bodyContext, f);
}
static void updateFeedDocumentWithExistingEntry(MessageBodyWorkers bodyContext,
Feed f, Entry e) throws IOException {
Entry old = findEntry(e.getId(), f);
f.getEntries().remove(old);
f.getEntries().add(0, e);
updateFeedDocument(bodyContext, f);
}
static Entry findEntry(String id, Feed f) {
List l = f.getEntries();
for (Object o : l) {
Entry e = (Entry)o;
if (id.equals(e.getId()))
return e;
}
return null;
}
static void addLink(Entry e, String rel, URI uri) {
Link l = new Link();
l.setRel(rel);
l.setHref(uri.toString());
e.getOtherLinks().add(l);
}
static String getLink(Entry e, String rel) {
List links = e.getOtherLinks();
Link l = null;
for (Object o : links) {
l = (Link)o;
if (l.getRel().equals(rel)) {
return l.getHref();
}
}
return null;
}
static void updateLink(Entry e, String rel, URI uri) {
List links = e.getOtherLinks();
Link l = null;
for (Object o : links) {
l = (Link)o;
if (l.getRel().equals(rel)) {
links.remove(l);
break;
}
}
l = new Link();
l.setRel(rel);
l.setHref(uri.toString());
links.add(l);
}
static void updateFeedDocument(MessageBodyWorkers bodyContext, Feed f) throws IOException {
MessageBodyWriter<Feed> ep = bodyContext.getMessageBodyWriter(
Feed.class, null,
null, atomMediaType);
synchronized(FileStore.FS) {
ep.writeTo(f, f.getClass(), null, null, atomMediaType, null, FileStore.FS.getFileOutputStream(AtomStore.getFeedPath()));
}
}
static void createEntryDocument(MessageBodyWorkers bodyContext, String id, Entry e) throws IOException {
MessageBodyWriter<Entry> ep = bodyContext.getMessageBodyWriter(
Entry.class, null,
null, atomMediaType);
String path = AtomStore.getEntryPath(id);
ep.writeTo(e, e.getClass(), null, null, atomMediaType, null, FileStore.FS.getFileOutputStream(path));
}
static void createMediaDocument(String id, byte[] content) throws IOException {
String path = AtomStore.getMediaPath(id);
OutputStream o = FileStore.FS.getFileOutputStream(path);
o.write(content);
o.close();
}
static void deleteEntry(String entryId) {
FileStore.FS.deleteDirectory(getPath(entryId));
}
static InputStream createDefaultFeedDocument(MessageBodyWorkers bodyContext,
String uri) throws IOException {
Feed f = new Feed();
f.setTitle("Feed");
Link selfLink = new Link();
selfLink.setRel("self");
selfLink.setHref(uri);
f.getOtherLinks().add(selfLink);
MessageBodyWriter<Feed> ep = bodyContext.getMessageBodyWriter(
Feed.class, null,
null, atomMediaType);
ep.writeTo(f, f.getClass(), null, null, atomMediaType, null, FileStore.FS.getFileOutputStream(AtomStore.getFeedPath()));
return FileStore.FS.getFileContents(AtomStore.getFeedPath());
}
static Entry createDefaulMediaLinkEntryDocument() {
Entry e = new Entry();
e.setTitle("Media Entry");
Date d = new Date();
e.setCreated(d);
e.setUpdated(d);
return e;
}
}