/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
package org.apache.directory.studio.ldapbrowser.common.dnd;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.apache.directory.api.ldap.model.name.Dn;
import org.apache.directory.studio.ldapbrowser.common.BrowserCommonConstants;
import org.apache.directory.studio.ldapbrowser.core.BrowserCorePlugin;
import org.apache.directory.studio.ldapbrowser.core.model.IAttribute;
import org.apache.directory.studio.ldapbrowser.core.model.IBrowserConnection;
import org.apache.directory.studio.ldapbrowser.core.model.IEntry;
import org.apache.directory.studio.ldapbrowser.core.model.IValue;
import org.eclipse.swt.dnd.ByteArrayTransfer;
import org.eclipse.swt.dnd.Transfer;
import org.eclipse.swt.dnd.TransferData;
/**
* A {@link Transfer} that could be used to transfer {@link IValue} objects.
*
* @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
*/
public class ValuesTransfer extends ByteArrayTransfer
{
/** The Constant TYPENAME. */
private static final String TYPENAME = BrowserCommonConstants.DND_VALUES_TRANSFER;
/** The Constant TYPEID. */
private static final int TYPEID = registerType( TYPENAME );
/** The instance. */
private static ValuesTransfer instance = new ValuesTransfer();
/**
* Gets the instance.
*
* @return the instance
*/
public static ValuesTransfer getInstance()
{
return instance;
}
/**
* Creates a new instance of ValuesTransfer.
*/
private ValuesTransfer()
{
}
/**
* {@inheritDoc}
*
* This implementation only accepts {@link IValue} objects.
* It converts the id of the connection, the entry's Dn, the
* attribute description and the value to the platform specific
* representation.
*/
public void javaToNative( Object object, TransferData transferData )
{
if ( !( object instanceof IValue[] ) )
{
return;
}
if ( isSupportedType( transferData ) )
{
IValue[] values = ( IValue[] ) object;
try
{
ByteArrayOutputStream out = new ByteArrayOutputStream();
DataOutputStream writeOut = new DataOutputStream( out );
for ( int i = 0; i < values.length; i++ )
{
byte[] connectionId = values[i].getAttribute().getEntry().getBrowserConnection().getConnection()
.getId().getBytes( "UTF-8" ); //$NON-NLS-1$
writeOut.writeInt( connectionId.length );
writeOut.write( connectionId );
byte[] dn = values[i].getAttribute().getEntry().getDn().getName().getBytes( "UTF-8" ); //$NON-NLS-1$
writeOut.writeInt( dn.length );
writeOut.write( dn );
byte[] attributeName = values[i].getAttribute().getDescription().getBytes( "UTF-8" ); //$NON-NLS-1$
writeOut.writeInt( attributeName.length );
writeOut.write( attributeName );
if ( values[i].isString() )
{
byte[] value = values[i].getStringValue().getBytes( "UTF-8" ); //$NON-NLS-1$
writeOut.writeBoolean( true );
writeOut.writeInt( value.length );
writeOut.write( value );
}
else if ( values[i].isBinary() )
{
byte[] value = values[i].getBinaryValue();
writeOut.writeBoolean( false );
writeOut.writeInt( value.length );
writeOut.write( value );
}
}
byte[] buffer = out.toByteArray();
writeOut.close();
super.javaToNative( buffer, transferData );
}
catch ( IOException e )
{
}
}
}
/**
* {@inheritDoc}
*
* This implementation converts the platform specific representation
* to the connection name, entry Dn, attribute description and value and
* restores the {@link IValue} object.
*/
public Object nativeToJava( TransferData transferData )
{
try
{
if ( isSupportedType( transferData ) )
{
byte[] buffer = ( byte[] ) super.nativeToJava( transferData );
if ( buffer == null )
{
return null;
}
List<IValue> valueList = new ArrayList<IValue>();
try
{
ByteArrayInputStream in = new ByteArrayInputStream( buffer );
DataInputStream readIn = new DataInputStream( in );
do
{
IBrowserConnection connection = null;
if ( readIn.available() > 1 )
{
int size = readIn.readInt();
byte[] connectionId = new byte[size];
readIn.read( connectionId );
connection = BrowserCorePlugin.getDefault().getConnectionManager()
.getBrowserConnectionById( new String( connectionId, "UTF-8" ) ); //$NON-NLS-1$
}
IEntry entry = null;
if ( readIn.available() > 1 && connection != null )
{
int size = readIn.readInt();
byte[] dn = new byte[size];
readIn.read( dn );
entry = connection.getEntryFromCache( new Dn( new String( dn, "UTF-8" ) ) ); //$NON-NLS-1$
}
else
{
return null;
}
IAttribute attribute = null;
if ( readIn.available() > 1 && entry != null )
{
int size = readIn.readInt();
byte[] attributeName = new byte[size];
readIn.read( attributeName );
attribute = entry.getAttribute( new String( attributeName, "UTF-8" ) ); //$NON-NLS-1$
}
else
{
return null;
}
IValue value = null;
if ( readIn.available() > 1 && attribute != null )
{
boolean isString = readIn.readBoolean();
int size = readIn.readInt();
byte[] val = new byte[size];
readIn.read( val );
String test = new String( val, "UTF-8" ); //$NON-NLS-1$
IValue[] values = attribute.getValues();
for ( int i = 0; i < values.length; i++ )
{
if ( isString && values[i].isString() && test.equals( values[i].getStringValue() ) )
{
value = values[i];
break;
}
else if ( !isString && values[i].isBinary()
&& test.equals( new String( values[i].getBinaryValue() ) ) )
{
value = values[i];
break;
}
}
}
else
{
return null;
}
if ( value != null )
{
valueList.add( value );
}
}
while ( readIn.available() > 1 );
readIn.close();
}
catch ( IOException ex )
{
return null;
}
return valueList.isEmpty() ? null : valueList.toArray( new IValue[valueList.size()] );
}
}
catch ( Exception e )
{
e.printStackTrace();
}
return null;
}
/**
* {@inheritDoc}
*/
protected String[] getTypeNames()
{
return new String[]
{ TYPENAME };
}
/**
* {@inheritDoc}
*/
protected int[] getTypeIds()
{
return new int[]
{ TYPEID };
}
}