/*
* 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.connection.ui.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.studio.connection.core.Connection;
import org.apache.directory.studio.connection.core.ConnectionCorePlugin;
import org.apache.directory.studio.connection.core.ConnectionFolder;
import org.apache.directory.studio.connection.core.ConnectionFolderManager;
import org.apache.directory.studio.connection.core.ConnectionManager;
import org.apache.directory.studio.connection.ui.ConnectionUIConstants;
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 Connection} objects.
* Note that only the connection id is converted to a platform specific
* representation, not the complete object. To convert it back to an {@link Connection}
* object the {@link ConnectionManager#getConnectionById(String)} method is invoked.
*
* @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
*/
public class ConnectionTransfer extends ByteArrayTransfer
{
/** The Constant TYPENAME. */
private static final String TYPENAME = ConnectionUIConstants.TYPENAME;
/** The Constant TYPEID. */
private static final int TYPEID = registerType( TYPENAME );
/** The instance. */
private static ConnectionTransfer instance = new ConnectionTransfer();
/**
* Creates a new instance of ConnectionTransfer.
*/
private ConnectionTransfer()
{
}
/**
* Gets the instance.
*
* @return the instance
*/
public static ConnectionTransfer getInstance()
{
return instance;
}
/**
* {@inheritDoc}
*
* This implementation only accepts {@link Connection} and {@link ConnectionFolder} objects.
* It just converts the id of the connection or connection folder to the platform
* specific representation.
*/
public void javaToNative( Object object, TransferData transferData )
{
if ( object == null || !( object instanceof Object[] ) )
{
return;
}
if ( isSupportedType( transferData ) )
{
Object[] objects = ( Object[] ) object;
try
{
ByteArrayOutputStream out = new ByteArrayOutputStream();
DataOutputStream writeOut = new DataOutputStream( out );
for ( int i = 0; i < objects.length; i++ )
{
if ( objects[i] instanceof Connection )
{
byte[] id = ( ( Connection ) objects[i] ).getConnectionParameter().getId().getBytes();
writeOut.writeInt( id.length );
writeOut.write( id );
}
else if ( objects[i] instanceof ConnectionFolder )
{
byte[] id = ( ( ConnectionFolder ) objects[i] ).getId().getBytes();
writeOut.writeInt( id.length );
writeOut.write( id );
}
}
byte[] buffer = out.toByteArray();
writeOut.close();
super.javaToNative( buffer, transferData );
}
catch ( IOException e )
{
}
}
}
/**
* {@inheritDoc}
*
* This implementation just converts the platform specific representation
* to the connection id or connection folder id and invokes
* {@link ConnectionManager#getConnectionById(String)} to get the
* {@link Connection} object or {@link ConnectionFolderManager#getConnectionFolderById(String)}
* to get the {@link ConnectionFolder} object.
*/
public Object nativeToJava( TransferData transferData )
{
if ( isSupportedType( transferData ) )
{
byte[] buffer = ( byte[] ) super.nativeToJava( transferData );
if ( buffer == null )
{
return null;
}
List<Object> objectList = new ArrayList<Object>();
try
{
ByteArrayInputStream in = new ByteArrayInputStream( buffer );
DataInputStream readIn = new DataInputStream( in );
do
{
if ( readIn.available() > 1 )
{
int size = readIn.readInt();
byte[] id = new byte[size];
readIn.read( id );
Connection connection = ConnectionCorePlugin.getDefault().getConnectionManager()
.getConnectionById( new String( id ) );
if ( connection != null )
{
objectList.add( connection );
}
else
{
ConnectionFolder folder = ConnectionCorePlugin.getDefault().getConnectionFolderManager()
.getConnectionFolderById( new String( id ) );
if ( folder != null )
{
objectList.add( folder );
}
}
}
}
while ( readIn.available() > 1 );
readIn.close();
}
catch ( IOException ex )
{
return null;
}
return objectList.toArray();
}
return null;
}
/**
* {@inheritDoc}
*/
protected String[] getTypeNames()
{
return new String[]
{ TYPENAME };
}
/**
* {@inheritDoc}
*/
protected int[] getTypeIds()
{
return new int[]
{ TYPEID };
}
}