/*
* Copyright 2012
* Ubiquitous Knowledge Processing (UKP) Lab and FG Language Technology
* Technische Universität Darmstadt
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package de.tudarmstadt.ukp.clarin.webanno.support;
import java.io.Serializable;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import org.hibernate.HibernateException;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.usertype.UserType;
/**
* user-defined enum "types"
*
*/
public abstract class PersistentEnumUserType<T extends PersistentEnum> implements UserType {
@Override
public Object assemble(Serializable cached, Object owner)
throws HibernateException {
return cached;
}
@Override
public Object deepCopy(Object value) throws HibernateException {
return value;
}
@Override
public Serializable disassemble(Object value) throws HibernateException {
return (Serializable)value;
}
@Override
public boolean equals(Object x, Object y) throws HibernateException {
return x == y;
}
@Override
public int hashCode(Object x) throws HibernateException {
return x == null ? 0 : x.hashCode();
}
@Override
public boolean isMutable() {
return false;
}
@Override
public Object nullSafeGet(ResultSet rs, String[] names,SessionImplementor session, Object owner)
throws HibernateException, SQLException {
String name = rs.getString(names[0]);
if(rs.wasNull()) {
return null;
}
for(PersistentEnum value : returnedClass().getEnumConstants()) {
if(name.equals(value.getId())) {
return value;
}
}
throw new IllegalStateException("Unknown " + returnedClass().getSimpleName() + " value ["
+ name + "]");
}
@Override
public void nullSafeSet(PreparedStatement st, Object value, int index, SessionImplementor session)
throws HibernateException, SQLException {
if (value == null) {
st.setNull(index, Types.INTEGER);
} else {
st.setString(index, ((PersistentEnum)value).getId());
}
}
@Override
public Object replace(Object original, Object target, Object owner)
throws HibernateException {
return original;
}
@Override
public abstract Class<T> returnedClass();
@Override
public int[] sqlTypes() {
return new int[]{Types.VARCHAR};
}
}