/**
* Execute the CREATE LINK.
*/
public Object execute(final Map<Object, Object> iArgs) {
if (destField == null)
throw new OCommandExecutionException("Can't execute the command because it hasn't been parsed yet");
if (!(database.getDatabaseOwner() instanceof ODatabaseDocumentTx))
throw new OCommandSQLParsingException("This command supports only the database type ODatabaseDocumentTx and type '"
+ database.getClass() + "' was found");
final ODatabaseDocumentTx db = (ODatabaseDocumentTx) database.getDatabaseOwner();
OClass sourceClass = database.getMetadata().getSchema().getClass(sourceClassName);
if (sourceClass == null)
throw new OCommandExecutionException("Source class '" + sourceClassName + "' not found");
OClass destClass = database.getMetadata().getSchema().getClass(destClassName);
if (destClass == null)
throw new OCommandExecutionException("Destination class '" + destClassName + "' not found");
Object value;
String cmd = "select from " + destClassName + " where " + destField + " = ";
List<ODocument> result;
ODocument target;
Object oldValue;
long total = 0;
if (linkName == null)
// NO LINK NAME EXPRESSED: OVERWRITE THE SOURCE FIELD
linkName = sourceField;
boolean inverse = linkType != null && linkType.equalsIgnoreCase("inverse");
boolean multipleRelationship = false;
long totRecords = db.countClass(sourceClass.getName());
long currRecord = 0;
if (progressListener != null)
progressListener.onBegin(this, totRecords);
try {
// BROWSE ALL THE RECORDS OF THE SOURCE CLASS
for (ODocument doc : db.browseClass(sourceClass.getName())) {
value = doc.field(sourceField);
if (value != null) {
if (value instanceof ODocument || value instanceof ORID) {
// ALREADY CONVERTED
} else if (value instanceof Collection<?>) {
// TODO
} else {
// SEARCH THE DESTINATION RECORD
target = null;
if (value instanceof String)
if (((String) value).length() == 0)
value = null;
else
value = "'" + value + "'";
result = database.<OCommandRequest> command(new OSQLSynchQuery<ODocument>(cmd + value)).execute();
if (result == null || result.size() == 0)
// throw new
// OCommandExecutionException("Can't create link because the destination record was not found in class '"
// + destClass.getName() + "' and with the field '" + destField + "' equals to " + value);
value = null;
else if (result.size() > 1)
throw new OCommandExecutionException("Can't create link because multiple records was found in class '"
+ destClass.getName() + "' with value " + value + " in field '" + destField + "'");
else {
target = result.get(0);
value = target;
}
if (target != null && inverse) {
// INVERSE RELATIONSHIP
oldValue = target.field(linkName);
if (oldValue != null) {
if (!multipleRelationship)
multipleRelationship = true;
Collection<ODocument> coll;
if (oldValue instanceof Collection) {
// ADD IT IN THE EXISTENT COLLECTION
coll = (Collection<ODocument>) oldValue;
target.setDirty();
} else {
// CREATE A NEW COLLECTION FOR BOTH
coll = new ArrayList<ODocument>(2);
target.field(linkName, coll);
coll.add((ODocument) oldValue);
}
coll.add(doc);
} else {
target.field(linkName, doc);
}
target.save();
} else {
// SET THE REFERENCE
doc.field(linkName, value);
doc.save();
}
total++;
}
}
if (progressListener != null)
progressListener.onProgress(this, currRecord, currRecord * 100f / totRecords);
}
if (total > 0) {
if (inverse) {
// REMOVE THE OLD PROPERTY IF ANY
OProperty prop = destClass.getProperty(linkName);
if (prop != null)
destClass.dropProperty(linkName);
// CREATE THE PROPERTY
destClass.createProperty(linkName, multipleRelationship ? OType.LINKLIST : OType.LINK, sourceClass);
} else {
// REMOVE THE OLD PROPERTY IF ANY
OProperty prop = sourceClass.getProperty(linkName);
if (prop != null)
sourceClass.dropProperty(linkName);
// CREATE THE PROPERTY
sourceClass.createProperty(linkName, OType.LINK, destClass);
}
}
if (progressListener != null)
progressListener.onCompletition(this, true);
} catch (Exception e) {
if (progressListener != null)
progressListener.onCompletition(this, false);
throw new OCommandExecutionException("Error on creation of links", e);
}
return total;
}