org.hibernate.type.descriptor.java.ByteArrayTypeDescriptor Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2010, Red Hat Inc. 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 Inc.
*
* 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.descriptor.java;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.sql.Blob;
import java.sql.SQLException;
import org.hibernate.HibernateException;
import org.hibernate.engine.jdbc.BinaryStream;
import org.hibernate.engine.jdbc.internal.BinaryStreamImpl;
import org.hibernate.type.descriptor.WrapperOptions;
/**
* TODO : javadoc
*
* @author Steve Ebersole
*/
public class ByteArrayTypeDescriptor extends AbstractTypeDescriptor {
public static final ByteArrayTypeDescriptor INSTANCE = new ByteArrayTypeDescriptor();
@SuppressWarnings({ "unchecked" })
public ByteArrayTypeDescriptor() {
super( Byte[].class, ArrayMutabilityPlan.INSTANCE );
}
@SuppressWarnings({ "UnnecessaryUnboxing" })
public String toString(Byte[] bytes) {
final StringBuilder buf = new StringBuilder();
for ( Byte aByte : bytes ) {
final String hexStr = Integer.toHexString( aByte.byteValue() - Byte.MIN_VALUE );
if ( hexStr.length() == 1 ) {
buf.append( '0' );
}
buf.append( hexStr );
}
return buf.toString();
}
@SuppressWarnings({ "UnnecessaryBoxing" })
public Byte[] fromString(String string) {
if ( string == null ) {
return null;
}
if ( string.length() % 2 != 0 ) {
throw new IllegalArgumentException( "The string is not a valid string representation of a binary content." );
}
Byte[] bytes = new Byte[string.length() / 2];
for ( int i = 0; i < bytes.length; i++ ) {
final String hexStr = string.substring( i * 2, (i + 1) * 2 );
bytes[i] = Byte.valueOf( (byte) (Integer.parseInt(hexStr, 16) + Byte.MIN_VALUE) );
}
return bytes;
}
@SuppressWarnings({ "unchecked" })
public X unwrap(Byte[] value, Class type, WrapperOptions options) {
if ( value == null ) {
return null;
}
if ( Byte[].class.isAssignableFrom( type ) ) {
return (X) value;
}
if ( byte[].class.isAssignableFrom( type ) ) {
return (X) unwrapBytes( value );
}
if ( InputStream.class.isAssignableFrom( type ) ) {
return (X) new ByteArrayInputStream( unwrapBytes( value ) );
}
if ( BinaryStream.class.isAssignableFrom( type ) ) {
return (X) new BinaryStreamImpl( unwrapBytes( value ) );
}
if ( Blob.class.isAssignableFrom( type ) ) {
return (X) options.getLobCreator().createBlob( unwrapBytes( value ) );
}
throw unknownUnwrap( type );
}
public Byte[] wrap(X value, WrapperOptions options) {
if ( value == null ) {
return null;
}
if ( Byte[].class.isInstance( value ) ) {
return (Byte[]) value;
}
if ( byte[].class.isInstance( value ) ) {
return wrapBytes( (byte[]) value );
}
if ( InputStream.class.isInstance( value ) ) {
return wrapBytes( DataHelper.extractBytes( (InputStream) value ) );
}
if ( Blob.class.isInstance( value ) || DataHelper.isNClob( value.getClass() ) ) {
try {
return wrapBytes( DataHelper.extractBytes( ( (Blob) value ).getBinaryStream() ) );
}
catch ( SQLException e ) {
throw new HibernateException( "Unable to access lob stream", e );
}
}
throw unknownWrap( value.getClass() );
}
@SuppressWarnings({ "UnnecessaryBoxing" })
private Byte[] wrapBytes(byte[] bytes) {
if ( bytes == null ) {
return null;
}
final Byte[] result = new Byte[bytes.length];
for ( int i = 0; i < bytes.length; i++ ) {
result[i] = Byte.valueOf( bytes[i] );
}
return result;
}
@SuppressWarnings({ "UnnecessaryUnboxing" })
private byte[] unwrapBytes(Byte[] bytes) {
if ( bytes == null ) {
return null;
}
final byte[] result = new byte[bytes.length];
for ( int i = 0; i < bytes.length; i++ ) {
result[i] = bytes[i].byteValue();
}
return result;
}
}