/*
* 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.web.jersey.persistence.hibernate;
import java.io.IOException;
import java.io.Serializable;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import java.util.Properties;
import com.fasterxml.jackson.core.JsonProcessingException;
import org.hibernate.HibernateException;
import org.hibernate.engine.spi.SharedSessionContractImplementor;
import org.hibernate.type.TextType;
import org.hibernate.usertype.ParameterizedType;
import org.hibernate.usertype.UserType;
import org.smallmind.nutsnbolts.json.VersionedJson;
import org.smallmind.nutsnbolts.version.Version;
import org.smallmind.nutsnbolts.version.VersionFactory;
import org.smallmind.web.jersey.util.JsonCodec;
public class VersionedJsonUserType<V extends Version<V>> implements UserType, ParameterizedType {
private VersionFactory<V> versionFactory;
public void setParameterValues (Properties parameters) {
String versionFactoryClassName = parameters.getProperty("versionFactoryClassName");
try {
Class<? extends VersionFactory<V>> versionFactoryClass;
versionFactoryClass = (Class<? extends VersionFactory<V>>)Class.forName(versionFactoryClassName);
versionFactory = versionFactoryClass.newInstance();
} catch (Exception exception) {
throw new HibernateException(exception);
}
}
@Override
public boolean isMutable () {
return false;
}
@Override
public Class returnedClass () {
return VersionedJson.class;
}
@Override
public int[] sqlTypes () {
return new int[] {Types.VARCHAR, TextType.INSTANCE.sqlType()};
}
@Override
public Object assemble (Serializable cached, Object owner) {
return cached;
}
@Override
public Serializable disassemble (Object value) {
return (Serializable)value;
}
@Override
public Object deepCopy (Object value) {
return value;
}
@Override
public Object replace (Object original, Object target, Object owner) {
return original;
}
@Override
public boolean equals (Object x, Object y) {
return (x == y) || ((x != null) && x.equals(y));
}
@Override
public int hashCode (Object x) {
return (x == null) ? 0 : x.hashCode();
}
@Override
public Object nullSafeGet (ResultSet rs, String[] names, SharedSessionContractImplementor session, Object owner)
throws HibernateException, SQLException {
String versionAsString;
if ((versionAsString = rs.getString(names[0])) != null) {
V version = versionFactory.fromString(versionAsString);
String jsonAsString;
if ((jsonAsString = rs.getString(names[1])) != null) {
try {
return JsonCodec.read(jsonAsString, version.getVersionedClass());
} catch (IOException ioException) {
throw new HibernateException(ioException);
}
}
}
return null;
}
@Override
public void nullSafeSet (PreparedStatement st, Object value, int index, SharedSessionContractImplementor session)
throws HibernateException, SQLException {
if (value == null) {
st.setNull(index, Types.VARCHAR);
st.setNull(index + 1, TextType.INSTANCE.sqlType());
} else {
st.setString(index, ((VersionedJson<?>)value).getVersion().toString());
try {
st.setString(index + 1, JsonCodec.writeAsString(value));
} catch (JsonProcessingException jsonProcessingException) {
throw new HibernateException(jsonProcessingException);
}
}
}
}