/*
* 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.datamodel.ValueData;
import org.exoplatform.services.jcr.impl.dataflow.EditableValueData;
import org.exoplatform.services.jcr.impl.dataflow.TransientValueData;
import org.exoplatform.services.jcr.impl.util.io.FileCleaner;
import org.exoplatform.services.log.ExoLogger;
import org.exoplatform.services.log.Log;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import javax.jcr.PropertyType;
import javax.jcr.RepositoryException;
import javax.jcr.ValueFormatException;
/**
* a binary value implementation.
*
* @author Gennady Azarenkov
*/
public class BinaryValue extends BaseValue implements EditableBinaryValue
{
public static final int TYPE = PropertyType.BINARY;
protected EditableValueData changedData = null;
protected boolean changed = false;
protected static Log log = ExoLogger.getLogger("jcr.BinaryValue");
/**
* @param text
* @throws IOException
*/
public BinaryValue(String text) throws IOException
{
super(TYPE, new TransientValueData(text));
}
/**
* BinaryValue constructor.
*
* @param stream
* InputStream
* @param fileCleaner
* FileCleaner
* @param tempDirectory
* File
* @param maxFufferSize
* int
* @throws IOException
* if error
*/
public BinaryValue(InputStream stream, FileCleaner fileCleaner, File tempDirectory, int maxFufferSize)
throws IOException
{
this(new TransientValueData(0, null, stream, null, fileCleaner, maxFufferSize, tempDirectory, true, false));
}
BinaryValue(TransientValueData data) throws IOException
{
super(TYPE, data);
}
/**
* For ValueFactory.loadValue().
*
* */
BinaryValue(ValueData data)
{
super(TYPE, data);
}
@Override
public ValueData getInternalData()
{
if (changedData != null)
{
return changedData;
}
return super.getInternalData();
}
@Override
protected LocalSessionValueData getLocalData(boolean asStream) throws IOException
{
if (this.changed)
{
// reset to be recreated with new stream/bytes
this.data = null;
this.changed = false;
}
return super.getLocalData(asStream);
}
public String getReference() throws ValueFormatException, IllegalStateException, RepositoryException
{
return getInternalString();
}
/**
* 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 (changedData == null)
{
changedData = createEditableCopy(this.getInternalData());
}
this.changedData.update(stream, length, position);
this.changed = true;
}
/**
* Truncates binary value to <code> size </code>
*
* @param size
* @throws IOException
*/
public void setLength(long size) throws IOException, RepositoryException
{
if (changedData == null)
{
changedData = createEditableCopy(this.getInternalData());
}
this.changedData.setLength(size);
this.changed = true;
}
/**
* Create editable ValueData copy.
*
* @return EditableValueData
* @throws RepositoryException
* if error occurs
* @throws IOException
* @throws IllegalStateException
*/
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(), null, -1, null);
}
catch (IOException e)
{
throw new RepositoryException(e);
}
}
else
{
// edited BLOB file, make a copy
try
{
EditableValueData copy =
new EditableValueData(oldValue.getAsStream(), oldValue.getOrderNumber(), null, -1, null);
return copy;
}
catch (FileNotFoundException e)
{
throw new RepositoryException("Create editable copy error. " + e, e);
}
catch (IOException e)
{
throw new RepositoryException("Create editable copy error. " + e, e);
}
}
}
}