org.hibernate.type.descriptor.java.PrimitiveByteArrayTypeDescriptor 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 java.util.Arrays;
import org.hibernate.HibernateException;
import org.hibernate.engine.jdbc.BinaryStream;
import org.hibernate.engine.jdbc.internal.BinaryStreamImpl;
import org.hibernate.type.descriptor.WrapperOptions;
/**
* Descriptor for {@code byte[]} handling.
*
* @author Steve Ebersole
*/
public class PrimitiveByteArrayTypeDescriptor extends AbstractTypeDescriptor {
public static final PrimitiveByteArrayTypeDescriptor INSTANCE = new PrimitiveByteArrayTypeDescriptor();
@SuppressWarnings({ "unchecked" })
public PrimitiveByteArrayTypeDescriptor() {
super( byte[].class, ArrayMutabilityPlan.INSTANCE );
}
@Override
public boolean areEqual(byte[] one, byte[] another) {
return one == another
|| ( one != null && another != null && Arrays.equals( one, another ) );
}
@Override
public int extractHashCode(byte[] bytes) {
int hashCode = 1;
for ( byte aByte : bytes ) {
hashCode = 31 * hashCode + aByte;
}
return hashCode;
}
public String toString(byte[] bytes) {
final StringBuilder buf = new StringBuilder( bytes.length * 2 );
for ( byte aByte : bytes ) {
final String hexStr = Integer.toHexString( aByte - Byte.MIN_VALUE );
if ( hexStr.length() == 1 ) {
buf.append( '0' );
}
buf.append( hexStr );
}
return buf.toString();
}
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) (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 ( InputStream.class.isAssignableFrom( type ) ) {
return (X) new ByteArrayInputStream( value );
}
if ( BinaryStream.class.isAssignableFrom( type ) ) {
return (X) new BinaryStreamImpl( value );
}
if ( Blob.class.isAssignableFrom( type ) ) {
return (X) options.getLobCreator().createBlob( 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 ( InputStream.class.isInstance( value ) ) {
return DataHelper.extractBytes( (InputStream) value );
}
if ( Blob.class.isInstance( value ) || DataHelper.isNClob( value.getClass() ) ) {
try {
return DataHelper.extractBytes( ( (Blob) value ).getBinaryStream() );
}
catch ( SQLException e ) {
throw new HibernateException( "Unable to access lob stream", e );
}
}
throw unknownWrap( value.getClass() );
}
}