/**********************************************************************************
* $URL: https://source.sakaiproject.org/svn/metaobj/trunk/metaobj-impl/api-impl/src/java/org/sakaiproject/metaobj/shared/model/impl/HibernateStructuredArtifact.java $
* $Id: HibernateStructuredArtifact.java 120216 2013-02-18 19:44:04Z ottenhoff@longsight.com $
***********************************************************************************
*
* Copyright (c) 2004, 2005, 2006, 2008 The Sakai Foundation
*
* Licensed under the Educational Community 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.opensource.org/licenses/ECL-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 org.sakaiproject.metaobj.shared.model.impl;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
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 org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.HibernateException;
import org.hibernate.usertype.UserType;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.input.SAXBuilder;
import org.jdom.output.XMLOutputter;
import org.sakaiproject.component.cover.ComponentManager;
import org.sakaiproject.metaobj.shared.mgt.HomeFactory;
import org.sakaiproject.metaobj.shared.mgt.WritableObjectHome;
import org.sakaiproject.metaobj.shared.model.StructuredArtifact;
public class HibernateStructuredArtifact extends StructuredArtifact implements UserType {
protected final Log logger = LogFactory.getLog(getClass());
private final static int[] SQL_TYPES = new int[]{Types.BLOB};
public HibernateStructuredArtifact() {
}
public int[] sqlTypes() {
return SQL_TYPES;
}
/* (non-Javadoc)
* @see org.hibernate.UserType#deepCopy(java.lang.Object)
*/
public Object deepCopy(Object arg0) throws HibernateException {
return arg0;
}
/* (non-Javadoc)
* @see org.hibernate.UserType#equals(java.lang.Object, java.lang.Object)
*/
public boolean equals(Object x, Object y) throws HibernateException {
return (x == y) || (x != null && y != null && x.equals(y));
}
/* (non-Javadoc)
* @see org.hibernate.UserType#isMutable()
*/
public boolean isMutable() {
return false;
}
/* (non-Javadoc)
* @see org.hibernate.UserType#nullSafeGet(java.sql.ResultSet, java.lang.String[], java.lang.Object)
*/
public Object nullSafeGet(ResultSet rs, String[] names, Object owner)
throws HibernateException, SQLException {
byte[] bytes = rs.getBytes(names[0]);
if (rs.wasNull()) {
return null;
}
//TODO figure out how to inject this
HomeFactory homeFactory = (HomeFactory) ComponentManager.getInstance().get("xmlHomeFactory");
WritableObjectHome home = (WritableObjectHome) homeFactory.getHome("agent");
StructuredArtifact artifact = (StructuredArtifact) home.createInstance();
ByteArrayInputStream in = new ByteArrayInputStream(bytes);
SAXBuilder saxBuilder = new SAXBuilder();
saxBuilder.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true); // SAK-23245
try {
Document doc = saxBuilder.build(in);
artifact.setBaseElement(doc.getRootElement());
}
catch (JDOMException e) {
throw new HibernateException(e);
}
catch (IOException e) {
throw new HibernateException(e);
}
return artifact;
}
/* (non-Javadoc)
* @see org.hibernate.UserType#nullSafeSet(java.sql.PreparedStatement, java.lang.Object, int)
*/
public void nullSafeSet(PreparedStatement st, Object value, int index)
throws HibernateException, SQLException {
if (value == null) {
st.setNull(index, Types.VARBINARY);
}
else {
StructuredArtifact artifact = (StructuredArtifact) value;
Document doc = new Document();
Element rootElement = artifact.getBaseElement();
rootElement.detach();
doc.setRootElement(rootElement);
ByteArrayOutputStream out = new ByteArrayOutputStream();
XMLOutputter xmlOutputter = new XMLOutputter();
try {
xmlOutputter.output(doc, out);
}
catch (IOException e) {
throw new HibernateException(e);
}
st.setBytes(index, out.toByteArray());
}
}
/* (non-Javadoc)
* @see org.hibernate.UserType#returnedClass()
*/
public Class returnedClass() {
return StructuredArtifact.class;
}
public Object assemble(Serializable arg0, Object arg1)
throws HibernateException {
return null;
}
public Serializable disassemble(Object arg0) throws HibernateException {
return null;
}
public int hashCode(Object arg0) throws HibernateException {
return arg0.hashCode();
}
public Object replace(Object arg0, Object arg1, Object arg2)
throws HibernateException {
return arg0;
}
}