@Override
public boolean add(Document o) {
if (o == null) return false;
Document doc = o;
// make it accept only docs from its own datastore
if (doc.getDataStore() != null && !this.dataStore.equals(doc.getDataStore())) {
Err.prln("Error: Persistent corpus can only accept documents " + "from its own datastore!");
return false;
} // if
// add the document with its index in the docDataList
// in this case, since it's going to be added to the end
// the index will be the size of the docDataList before
// the addition
DocumentData docData =
new DocumentData(doc.getName(), doc.getLRPersistenceId(), doc.getClass().getName());
boolean result = docDataList.add(docData);
documents.add(doc);
documentAdded(doc);
fireDocumentAdded(
new CorpusEvent(
SerialCorpusImpl.this,
doc,
docDataList.size() - 1,
doc.getLRPersistenceId(),
CorpusEvent.DOCUMENT_ADDED));
return result;
}
/**
* Unloads a document from memory.
*
* @param index the index of the document to be unloaded.
* @param sync should the document be sync'ed (i.e. saved) before unloading.
*/
public void unloadDocument(int index, boolean sync) {
// 1. check whether its been loaded and is a persistent one
// if a persistent doc is not loaded, there's nothing we need to do
if ((!isDocumentLoaded(index)) && isPersistentDocument(index)) return;
// 2. If requested, sync the document before releasing it from
// memory,
// because the creole register garbage collects all LRs which are
// not used
// any more
if (sync) {
Document doc = documents.get(index);
try {
// if the document is not already adopted, we need to do that
// first
if (doc.getLRPersistenceId() == null) {
doc = (Document) this.getDataStore().adopt(doc);
this.getDataStore().sync(doc);
this.setDocumentPersistentID(index, doc.getLRPersistenceId());
} else // if it is adopted, just sync it
this.getDataStore().sync(doc);
} catch (PersistenceException ex) {
throw new GateRuntimeException(
"Error unloading document from corpus"
+ "because document sync failed: "
+ ex.getMessage(),
ex);
}
}
// 3. remove the document from the memory
// do this, only if the saving has succeeded
documents.set(index, null);
}
@Override
public void add(int index, Document o) {
if (o == null) return;
Document doc = o;
DocumentData docData =
new DocumentData(doc.getName(), doc.getLRPersistenceId(), doc.getClass().getName());
docDataList.add(index, docData);
documents.add(index, doc);
documentAdded(doc);
fireDocumentAdded(
new CorpusEvent(
SerialCorpusImpl.this,
doc,
index,
doc.getLRPersistenceId(),
CorpusEvent.DOCUMENT_ADDED));
}
public int findDocument(Document doc) {
boolean found = false;
DocumentData docData = null;
// first try finding the document in memory
int index = documents.indexOf(doc);
if (index > -1 && index < docDataList.size()) return index;
// else try finding a document with the same name and persistent ID
Iterator<DocumentData> iter = docDataList.iterator();
for (index = 0; iter.hasNext(); index++) {
docData = iter.next();
if (docData.getDocumentName().equals(doc.getName())
&& docData.getPersistentID().equals(doc.getLRPersistenceId())
&& docData.getClassType().equals(doc.getClass().getName())) {
found = true;
break;
}
}
if (found && index < docDataList.size()) return index;
else return -1;
} // findDocument
