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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.Blob;
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.HibernateException;
import org.hibernate.MappingException;
import org.hibernate.Hibernate;
import org.hibernate.engine.Mapping;
import org.hibernate.engine.SessionFactoryImplementor;
import org.hibernate.engine.SessionImplementor;
import org.hibernate.engine.jdbc.BlobImplementer;
import org.hibernate.engine.jdbc.WrappedBlob;
import org.hibernate.engine.jdbc.LobCreator;
import org.hibernate.engine.jdbc.NonContextualLobCreator;
import org.hibernate.util.ArrayHelper;
/**
* blob: A type that maps an SQL BLOB to a java.sql.Blob.
* @author Gavin King
*/
public class BlobType extends AbstractType {
/**
* {@inheritDoc}
*/
public void nullSafeSet(
PreparedStatement st,
Object value,
int index,
boolean[] settable,
SessionImplementor session) throws HibernateException, SQLException {
if ( settable[0] ) {
set( st, value, index, session );
}
}
/**
* {@inheritDoc}
*/
public void nullSafeSet(
PreparedStatement st,
Object value,
int index,
SessionImplementor session) throws HibernateException, SQLException {
set( st, value, index, session );
}
public void set(
PreparedStatement st,
Object value,
int index,
SessionImplementor session) throws HibernateException, SQLException {
if ( value == null ) {
st.setNull( index, Types.BLOB );
return;
}
Blob blob = ( Blob ) value;
if ( WrappedBlob.class.isInstance( blob ) ) {
blob = ( (WrappedBlob) value ).getWrappedBlob();
}
final boolean useInputStream = session.getFactory().getDialect().useInputStreamToInsertBlob()
&& BlobImplementer.class.isInstance( blob );
if ( useInputStream ) {
st.setBinaryStream( index, blob.getBinaryStream(), (int) blob.length() );
}
else {
st.setBlob( index, blob );
}
}
/**
* {@inheritDoc}
*/
public Object nullSafeGet(
ResultSet rs,
String name,
SessionImplementor session,
Object owner) throws HibernateException, SQLException {
return get( rs, name, Hibernate.getLobCreator( session ) );
}
/**
* {@inheritDoc}
*/
public Object nullSafeGet(
ResultSet rs,
String[] names,
SessionImplementor session,
Object owner) throws HibernateException, SQLException {
return get( rs, names[0], Hibernate.getLobCreator( session ) );
}
/**
* A method to extract the BLOB value from a result set.
*
* @param rs The result set
* @param name The name of the column containing the BLOB
*
* @return The BLOB
*
* @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 Object get(ResultSet rs, String name, LobCreator lobCreator) throws SQLException {
Blob value = rs.getBlob( name );
return rs.wasNull() ? null : lobCreator.wrap( value );
}
/**
* {@inheritDoc}
*/
public Class getReturnedClass() {
return Blob.class;
}
/**
* {@inheritDoc}
*/
public boolean isEqual(Object x, Object y, EntityMode entityMode) {
return x == y;
}
/**
* {@inheritDoc}
*/
public int getHashCode(Object x, EntityMode entityMode) {
return System.identityHashCode(x);
}
/**
* {@inheritDoc}
*/
public int compare(Object x, Object y, EntityMode entityMode) {
return 0; //lobs cannot be compared
}
/**
* {@inheritDoc}
*/
public String getName() {
return "blob";
}
/**
* {@inheritDoc}
*/
public Serializable disassemble(Object value, SessionImplementor session, Object owner)
throws UnsupportedOperationException {
throw new UnsupportedOperationException("Blobs are not cacheable");
}
/**
* {@inheritDoc}
*/
public Object deepCopy(Object value, EntityMode entityMode, SessionFactoryImplementor factory) {
return value;
}
/**
* {@inheritDoc}
*/
public Object fromXMLNode(Node xml, Mapping factory) {
throw new UnsupportedOperationException("todo");
}
/**
* {@inheritDoc}
*/
public int getColumnSpan(Mapping mapping) {
return 1;
}
/**
* {@inheritDoc}
*/
public boolean isMutable() {
return false;
}
/**
* {@inheritDoc}
*/
public Object replace(
Object original,
Object target,
SessionImplementor session,
Object owner,
Map copyCache) throws HibernateException {
//Blobs are ignored by merge()
return target;
}
/**
* {@inheritDoc}
*/
public int[] sqlTypes(Mapping mapping) throws MappingException {
return new int[] { Types.BLOB };
}
/**
* {@inheritDoc}
*/
public void setToXMLNode(Node node, Object value, SessionFactoryImplementor factory) {
throw new UnsupportedOperationException("todo");
}
/**
* {@inheritDoc}
*/
public String toLoggableString(Object value, SessionFactoryImplementor factory) throws HibernateException {
return value==null ? "null" : value.toString();
}
/**
* {@inheritDoc}
*/
public boolean[] toColumnNullness(Object value, Mapping mapping) {
return value==null ? ArrayHelper.FALSE : ArrayHelper.TRUE;
}
/**
* {@inheritDoc}
*/
public boolean isDirty(
Object old,
Object current,
boolean[] checkable,
SessionImplementor session) throws HibernateException {
return checkable[0] && isDirty(old, current, session);
}
}
