/**
* Copyright (C) 2010-2014 Morgner UG (haftungsbeschränkt)
*
* This file is part of Structr <http://structr.org>.
*
* Structr is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* Structr is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Structr. If not, see <http://www.gnu.org/licenses/>.
*/
package org.structr.core.validator;
import org.structr.common.SecurityContext;
import org.structr.common.error.EmptyPropertyToken;
import org.structr.common.error.ErrorBuffer;
import org.structr.common.error.UniqueToken;
import org.structr.core.GraphObject;
import org.structr.core.PropertyValidator;
import org.structr.core.entity.AbstractNode;
import java.util.logging.Logger;
import org.structr.common.error.FrameworkException;
import org.structr.core.property.PropertyKey;
import org.structr.core.app.StructrApp;
//~--- classes ----------------------------------------------------------------
/**
* A validator that ensures global uniqueness of a given property value,
* regardless of the entity's type.
*
* @author Christian Morgner
*/
public class GlobalPropertyUniquenessValidator<T> implements PropertyValidator<T> {
private static final Logger logger = Logger.getLogger(GlobalPropertyUniquenessValidator.class.getName());
//~--- get methods ----------------------------------------------------
@Override
public boolean isValid(SecurityContext securityContext, GraphObject object, PropertyKey<T> key, T value, ErrorBuffer errorBuffer) {
// FIXME: changed isEmpty to != null
if (value == null) {
errorBuffer.add(object.getType(), new EmptyPropertyToken(key));
return false;
}
if (key != null && value != null) {
String id = null;
GraphObject existingNode = null;
try {
// UUID is globally unique
if (key.equals(GraphObject.id)) {
//return true; // trust uniqueness
existingNode = StructrApp.getInstance().get(value.toString());
//existingNode = StructrApp.getInstance().nodeQuery(AbstractNode.class).and(key, value).getFirst();
} else {
existingNode = StructrApp.getInstance().nodeQuery(AbstractNode.class).and(key, value).getFirst();
}
} catch (FrameworkException fex) {
// handle error
}
if (existingNode != null) {
GraphObject foundNode = existingNode;
if (foundNode.getId() != object.getId()) {
id = foundNode.getUuid();
errorBuffer.add(object.getType(), new UniqueToken(id, key, value));
return false;
}
}
}
return true;
}
@Override
public boolean requiresSynchronization() {
return true;
}
}