/*
* Copyright (c) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 David Berkman
*
* This file is part of the SmallMind Code Project.
*
* The SmallMind Code Project is free software, you can redistribute
* it and/or modify it under either, at your discretion...
*
* 1) The terms of GNU Affero General Public License as published by the
* Free Software Foundation, either version 3 of the License, or (at
* your option) any later version.
*
* ...or...
*
* 2) The terms of the Apache License, Version 2.0.
*
* The SmallMind Code Project 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 or Apache License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* and the Apache License along with the SmallMind Code Project. If not, see
* <http://www.gnu.org/licenses/> or <http://www.apache.org/licenses/LICENSE-2.0>.
*
* Additional permission under the GNU Affero GPL version 3 section 7
* ------------------------------------------------------------------
* If you modify this Program, or any covered work, by linking or
* combining it with other code, such other code is not for that reason
* alone subject to any of the requirements of the GNU Affero GPL
* version 3.
*/
package org.smallmind.persistence.nosql.hector;
import me.prettyprint.cassandra.serializers.StringSerializer;
import me.prettyprint.cassandra.service.template.ColumnFamilyResult;
import me.prettyprint.hector.api.Serializer;
import me.prettyprint.hector.api.beans.Composite;
import org.smallmind.persistence.PersistenceException;
public class EnumTranslator implements HectorTranslator<Enum<?>, String> {
@Override
public String getHectorType () {
return "UTF8Type";
}
@Override
public Serializer<String> getSerializer () {
return StringSerializer.get();
}
@Override
public String toHectorValue (Enum<?> value) {
return value.name();
}
@Override
public Enum<?> toEntityValue (Class<?> fieldType, int index, Composite columnName) {
return fromName(fieldType, columnName.get(index, StringSerializer.get()));
}
@Override
public Enum<?> toEntityValue (Class<?> fieldType, Composite columnName, ColumnFamilyResult<Composite, Composite> hectorResult) {
return fromName(fieldType, hectorResult.getString(columnName));
}
private Enum<?> fromName (Class<?> fieldType, String enumName) {
for (Object enumConstant : fieldType.getEnumConstants()) {
if (((Enum)enumConstant).name().equals(enumName)) {
return (Enum)enumConstant;
}
}
throw new PersistenceException("Unable to locate matching enum constant(%s) for field of type(%s)", enumName, fieldType.getName());
}
}