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/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008, Red Hat Middleware LLC or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Middleware LLC.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program 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 Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*
*/
package org.hibernate.type;
import java.io.Serializable;
import java.sql.Clob;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import java.util.Map;
import org.dom4j.Node;
import org.hibernate.EntityMode;
import org.hibernate.Hibernate;
import org.hibernate.HibernateException;
import org.hibernate.MappingException;
import org.hibernate.engine.Mapping;
import org.hibernate.engine.SessionFactoryImplementor;
import org.hibernate.engine.SessionImplementor;
import org.hibernate.engine.jdbc.LobCreator;
import org.hibernate.engine.jdbc.NonContextualLobCreator;
import org.hibernate.engine.jdbc.WrappedClob;
import org.hibernate.engine.jdbc.ClobImplementer;
import org.hibernate.util.ArrayHelper;
/**
* clob: A type that maps an SQL CLOB to a java.sql.Clob.
* @author Gavin King
*/
public class ClobType extends AbstractType {
public void nullSafeSet(
PreparedStatement st,
Object value,
int index,
boolean[] settable,
SessionImplementor session) throws SQLException {
if ( settable[0] ) {
set( st, value, index, session );
}
}
public void nullSafeSet(
PreparedStatement st,
Object value,
int index,
SessionImplementor session) throws SQLException {
set( st, value, index, session );
}
public void set(
PreparedStatement st,
Object value,
int index,
SessionImplementor session) throws SQLException {
if ( value == null ) {
st.setNull( index, Types.CLOB );
return;
}
Clob clob = ( Clob ) value;
if ( WrappedClob.class.isInstance( clob ) ) {
clob = ( (WrappedClob) value ).getWrappedClob();
}
final boolean useInputStream = session.getFactory().getDialect().useInputStreamToInsertBlob()
&& ClobImplementer.class.isInstance( clob );
if ( useInputStream ) {
st.setCharacterStream( index, clob.getCharacterStream(), (int) clob.length() );
}
else {
st.setClob( index, clob );
}
}
public Object nullSafeGet(
ResultSet rs,
String name,
SessionImplementor session,
Object owner) throws SQLException {
return get( rs, name, Hibernate.getLobCreator( session ) );
}
public Object nullSafeGet(
ResultSet rs,
String[] names,
SessionImplementor session,
Object owner) throws SQLException {
return get( rs, names[0], Hibernate.getLobCreator( session ) );
}
/**
* A method to extract the CLOB value from a result set.
*
* @param rs The result set
* @param name The name of the column containing the CLOB
*
* @return The CLOB
*
* @throws SQLException Indicates a problem accessing the result set
*
* @deprecated Use {@link #get(ResultSet,String,LobCreator)} instead
*/
public Object get(ResultSet rs, String name) throws SQLException {
return get( rs, name, NonContextualLobCreator.INSTANCE );
}
public Clob get(ResultSet rs, String name, LobCreator lobCreator) throws SQLException {
Clob value = rs.getClob( name );
return rs.wasNull() ? null : lobCreator.wrap( value );
}
public Class getReturnedClass() {
return Clob.class;
}
public boolean isEqual(Object x, Object y, EntityMode entityMode) {
return x == y;
}
public int getHashCode(Object x, EntityMode entityMode) {
return System.identityHashCode(x);
}
public int compare(Object x, Object y, EntityMode entityMode) {
return 0; //lobs cannot be compared
}
public String getName() {
return "clob";
}
public Serializable disassemble(Object value, SessionImplementor session, Object owner)
throws HibernateException {
throw new UnsupportedOperationException("Clobs are not cacheable");
}
public Object deepCopy(Object value, EntityMode entityMode, SessionFactoryImplementor factory) {
return value;
}
public Object fromXMLNode(Node xml, Mapping factory) {
return Hibernate.createClob( xml.getText() );
}
public int getColumnSpan(Mapping mapping) {
return 1;
}
public boolean isMutable() {
return false;
}
public Object replace(Object original, Object target,
SessionImplementor session, Object owner, Map copyCache)
throws HibernateException {
//Clobs are ignored by merge() operation
return target;
}
public int[] sqlTypes(Mapping mapping) throws MappingException {
return new int[] { Types.CLOB };
}
public void setToXMLNode(Node node, Object value, SessionFactoryImplementor factory) {
if (value!=null) {
Clob clob = (Clob) value;
try {
int len = (int) clob.length();
node.setText( clob.getSubString(0, len) );
}
catch (SQLException sqle) {
throw new HibernateException("could not read XML from Clob", sqle);
}
}
}
public String toLoggableString(Object value, SessionFactoryImplementor factory)
throws HibernateException {
return value==null ? "null" : value.toString();
}
public boolean[] toColumnNullness(Object value, Mapping mapping) {
return value==null ? ArrayHelper.FALSE : ArrayHelper.TRUE;
}
public boolean isDirty(Object old, Object current, boolean[] checkable, SessionImplementor session) throws HibernateException {
return checkable[0] && isDirty(old, current, session);
}
}
