/*
* Copyright (C) 2009 eXo Platform SAS.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.exoplatform.services.jcr.impl.core.value;
import org.exoplatform.services.jcr.core.value.EditableBinaryValue;
import org.exoplatform.services.jcr.core.value.ReadableBinaryValue;
import org.exoplatform.services.jcr.datamodel.ValueData;
import org.exoplatform.services.jcr.impl.dataflow.EditableValueData;
import org.exoplatform.services.jcr.impl.dataflow.SpoolConfig;
import org.exoplatform.services.jcr.impl.dataflow.TransientValueData;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import javax.jcr.PropertyType;
import javax.jcr.RepositoryException;
/**
* a binary value implementation.
*
* @author Gennady Azarenkov
*/
public class BinaryValue extends BaseValue implements EditableBinaryValue, ReadableBinaryValue
{
public static final int TYPE = PropertyType.BINARY;
protected boolean changed;
protected final SpoolConfig spoolConfig;
/**
* BinaryValue constructor.
*
* @param stream
* InputStream
* @throws IOException
* if error
*/
public BinaryValue(InputStream stream, SpoolConfig spoolConfig)
throws IOException
{
this(new TransientValueData(0, stream, null, spoolConfig), spoolConfig);
}
/**
* For ValueFactory.loadValue().
*/
BinaryValue(ValueData data, SpoolConfig spoolConfig)
{
super(TYPE, data);
this.spoolConfig = spoolConfig;
}
/**
* Update with <code>length</code> bytes from the specified InputStream <code>stream</code> to
* this binary value at <code>position</code>
*
* @param stream
* the data.
* @param length
* the number of bytes from buffer to write.
* @param position
* position in file to write data
* */
public void update(InputStream stream, long length, long position) throws IOException, RepositoryException
{
if (!changed)
{
internalData = createEditableCopy(this.getInternalData());
}
((EditableValueData)internalData).update(stream, length, position);
invalidateStream();
}
/**
* Truncates binary value to <code> size </code>
*/
public void setLength(long size) throws IOException, RepositoryException
{
if (!changed)
{
internalData = createEditableCopy(this.getInternalData());
}
((EditableValueData)internalData).setLength(size);
invalidateStream();
}
/**
* Create editable ValueData copy.
*/
private EditableValueData createEditableCopy(ValueData oldValue) throws RepositoryException, IllegalStateException,
IOException
{
if (oldValue.isByteArray())
{
// bytes, make a copy of real data
byte[] oldBytes = oldValue.getAsByteArray();
byte[] newBytes = new byte[oldBytes.length];
System.arraycopy(oldBytes, 0, newBytes, 0, newBytes.length);
try
{
return new EditableValueData(newBytes, oldValue.getOrderNumber());
}
catch (IOException e)
{
throw new RepositoryException(e);
}
}
else
{
// edited BLOB file, make a copy
try
{
return new EditableValueData(oldValue.getAsStream(), oldValue.getOrderNumber(), spoolConfig);
}
catch (FileNotFoundException e)
{
throw new RepositoryException("Create editable copy error. " + e, e);
}
catch (IOException e)
{
throw new RepositoryException("Create editable copy error. " + e, e);
}
}
}
}