//$Id: BlobType.java 7644 2005-07-25 06:53:09Z oneovthafew $
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.engine.Mapping;
import org.hibernate.engine.SessionFactoryImplementor;
import org.hibernate.engine.SessionImplementor;
import org.hibernate.lob.BlobImpl;
import org.hibernate.lob.SerializableBlob;
import org.hibernate.util.ArrayHelper;
/**
* <tt>blob</tt>: A type that maps an SQL BLOB to a java.sql.Blob.
* @author Gavin King
*/
public class BlobType extends AbstractType {
public void set(PreparedStatement st, Object value, int index, SessionImplementor session)
throws HibernateException, SQLException {
if (value==null) {
st.setNull(index, Types.BLOB);
}
else {
if (value instanceof SerializableBlob) {
value = ( (SerializableBlob) value ).getWrappedBlob();
}
final boolean useInputStream = session.getFactory().getDialect().useInputStreamToInsertBlob() &&
(value instanceof BlobImpl);
if ( useInputStream ) {
BlobImpl blob = (BlobImpl) value;
st.setBinaryStream( index, blob.getBinaryStream(), (int) blob.length() );
}
else {
st.setBlob(index, (Blob) value);
}
}
}
public Object get(ResultSet rs, String name) throws HibernateException, SQLException {
Blob value = rs.getBlob(name);
return rs.wasNull() ? null : new SerializableBlob(value);
}
public Class getReturnedClass() {
return Blob.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 "blob";
}
public Serializable disassemble(Object value, SessionImplementor session, Object owner)
throws HibernateException {
throw new UnsupportedOperationException("Blobs are not cacheable");
}
public Object deepCopy(Object value, EntityMode entityMode, SessionFactoryImplementor factory) {
return value;
}
public Object fromXMLNode(Node xml, Mapping factory) {
throw new UnsupportedOperationException("todo");
}
public int getColumnSpan(Mapping mapping) {
return 1;
}
public boolean isMutable() {
return false;
}
public Object nullSafeGet(ResultSet rs, String name,
SessionImplementor session, Object owner)
throws HibernateException, SQLException {
return get(rs, name);
}
public Object nullSafeGet(ResultSet rs, String[] names,
SessionImplementor session, Object owner)
throws HibernateException, SQLException {
return get( rs, names[0] );
}
public void nullSafeSet(PreparedStatement st, Object value, int index,
boolean[] settable, SessionImplementor session)
throws HibernateException, SQLException {
if ( settable[0] ) set(st, value, index, session);
}
public void nullSafeSet(PreparedStatement st, Object value, int index,
SessionImplementor session) throws HibernateException, SQLException {
set(st, value, index, session);
}
public Object replace(Object original, Object target,
SessionImplementor session, Object owner, Map copyCache)
throws HibernateException {
//Blobs are ignored by merge()
return target;
}
public int[] sqlTypes(Mapping mapping) throws MappingException {
return new int[] { Types.BLOB };
}
public void setToXMLNode(Node node, Object value, SessionFactoryImplementor factory) {
throw new UnsupportedOperationException("todo");
}
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);
}
}