org.graphstream.stream.netstream.NetStreamDecoder Maven / Gradle / Ivy

/*
 * This file is part of GraphStream .
 * 
 * GraphStream is a library whose purpose is to handle static or dynamic
 * graph, create them from scratch, file or any source and display them.
 * 
 * This program is free software distributed under the terms of two licenses, the
 * CeCILL-C license that fits European law, and the GNU Lesser General Public
 * License. You can  use, modify and/ or redistribute the software under the terms
 * of the CeCILL-C license as circulated by CEA, CNRS and INRIA at the following
 * URL  or under the terms of the GNU LGPL as published by
 * the Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.
 * 
 * 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 program.  If not, see .
 * 
 * The fact that you are presently reading this means that you have had
 * knowledge of the CeCILL-C and LGPL licenses and that you accept their terms.
 */

/**
 * @since 2013-05-31
 * 
 * @author Yoann Pigné 
 * @author Guilhelm Savin 
 * @author Hicham Brahimi 
 */
package org.graphstream.stream.netstream;

import org.graphstream.stream.binary.ByteDecoder;
import org.graphstream.stream.SourceBase;

import static org.graphstream.stream.netstream.NetStreamUtils.*;

import java.nio.BufferUnderflowException;
import java.nio.ByteBuffer;
import java.util.logging.Logger;

/**
 * @since 22/01/16.
 */
public class NetStreamDecoder extends SourceBase implements ByteDecoder {
	private static final Logger LOGGER = Logger.getLogger(NetStreamDecoder.class.getName());

	@Override
	public boolean validate(ByteBuffer buffer) {
		if (buffer.position() >= 4) {
			int size = buffer.getInt(0);
			return buffer.position() >= size;
		}

		return false;
	}

	@Override
	public void decode(ByteBuffer bb) {
		try {
			int size = bb.getInt();
			String streamId = NetStreamUtils.decodeString(bb);
			int cmd = bb.get();

			if (cmd == NetStreamConstants.EVENT_ADD_NODE) {
				serve_EVENT_ADD_NODE(bb);
			} else if ((cmd & 0xFF) == (NetStreamConstants.EVENT_DEL_NODE & 0xFF)) {
				serve_DEL_NODE(bb);
			} else if (cmd == NetStreamConstants.EVENT_ADD_EDGE) {
				serve_EVENT_ADD_EDGE(bb);
			} else if (cmd == NetStreamConstants.EVENT_DEL_EDGE) {
				serve_EVENT_DEL_EDGE(bb);
			} else if (cmd == NetStreamConstants.EVENT_STEP) {
				serve_EVENT_STEP(bb);
			} else if (cmd == NetStreamConstants.EVENT_CLEARED) {
				serve_EVENT_CLEARED(bb);
			} else if (cmd == NetStreamConstants.EVENT_ADD_GRAPH_ATTR) {
				serve_EVENT_ADD_GRAPH_ATTR(bb);
			} else if (cmd == NetStreamConstants.EVENT_CHG_GRAPH_ATTR) {
				serve_EVENT_CHG_GRAPH_ATTR(bb);
			} else if (cmd == NetStreamConstants.EVENT_DEL_GRAPH_ATTR) {
				serve_EVENT_DEL_GRAPH_ATTR(bb);
			} else if (cmd == NetStreamConstants.EVENT_ADD_NODE_ATTR) {
				serve_EVENT_ADD_NODE_ATTR(bb);
			} else if (cmd == NetStreamConstants.EVENT_CHG_NODE_ATTR) {
				serve_EVENT_CHG_NODE_ATTR(bb);
			} else if (cmd == NetStreamConstants.EVENT_DEL_NODE_ATTR) {
				serve_EVENT_DEL_NODE_ATTR(bb);
			} else if (cmd == NetStreamConstants.EVENT_ADD_EDGE_ATTR) {
				serve_EVENT_ADD_EDGE_ATTR(bb);
			} else if (cmd == NetStreamConstants.EVENT_CHG_EDGE_ATTR) {
				serve_EVENT_CHG_EDGE_ATTR(bb);
			} else if (cmd == NetStreamConstants.EVENT_DEL_EDGE_ATTR) {
				serve_EVENT_DEL_EDGE_ATTR(bb);
			} else if (cmd == NetStreamConstants.EVENT_END) {
				LOGGER.info("NetStreamReceiver : Client properly ended the connection.");
			} else {
				LOGGER.warning("NetStreamReceiver: Don't know this command: " + cmd);
			}
		} catch (BufferUnderflowException e) {
			LOGGER.warning("bad buffer");
		}
	}

	/**
	 * @param bb
	 * @see NetStreamConstants#EVENT_DEL_EDGE
	 */
	protected void serve_EVENT_DEL_EDGE_ATTR(ByteBuffer bb) {
		LOGGER.finest("NetStreamServer: Received DEL_EDGE_ATTR command.");

		String sourceId = decodeString(bb);
		long timeId = decodeUnsignedVarint(bb);
		String edgeId = decodeString(bb);
		String attrId = decodeString(bb);

		sendEdgeAttributeRemoved(sourceId, timeId, edgeId, attrId);
	}

	/**
	 * @see NetStreamConstants#EVENT_CHG_EDGE_ATTR
	 */
	protected void serve_EVENT_CHG_EDGE_ATTR(ByteBuffer bb) {
		LOGGER.finest("NetStreamServer: Received CHG_EDGE_ATTR command.");

		String sourceId = decodeString(bb);
		long timeId = decodeUnsignedVarint(bb);
		String edgeId = decodeString(bb);
		String attrId = decodeString(bb);
		int oldValueType = decodeType(bb);
		Object oldValue = decodeValue(bb, oldValueType);
		int newValueType = decodeType(bb);
		Object newValue = decodeValue(bb, newValueType);

		sendEdgeAttributeChanged(sourceId, timeId, edgeId, attrId, oldValue, newValue);

	}

	/**
	 * @see NetStreamConstants#EVENT_ADD_EDGE_ATTR
	 */
	protected void serve_EVENT_ADD_EDGE_ATTR(ByteBuffer bb) {
		LOGGER.finest("NetStreamServer: Received ADD_EDGE_ATTR command.");

		String sourceId = decodeString(bb);
		long timeId = decodeUnsignedVarint(bb);
		String edgeId = decodeString(bb);
		String attrId = decodeString(bb);
		Object value = decodeValue(bb, decodeType(bb));

		sendEdgeAttributeAdded(sourceId, timeId, edgeId, attrId, value);

	}

	/**
	 * @see NetStreamConstants#EVENT_DEL_NODE_ATTR
	 */
	protected void serve_EVENT_DEL_NODE_ATTR(ByteBuffer bb) {
		LOGGER.finest("NetStreamServer: Received DEL_NODE_ATTR command.");

		String sourceId = decodeString(bb);
		long timeId = decodeUnsignedVarint(bb);
		String nodeId = decodeString(bb);
		String attrId = decodeString(bb);

		sendNodeAttributeRemoved(sourceId, timeId, nodeId, attrId);

	}

	/**
	 * @see NetStreamConstants#EVENT_CHG_NODE_ATTR
	 */
	protected void serve_EVENT_CHG_NODE_ATTR(ByteBuffer bb) {
		LOGGER.finest("NetStreamServer: Received EVENT_CHG_NODE_ATTR command.");

		String sourceId = decodeString(bb);
		long timeId = decodeUnsignedVarint(bb);
		String nodeId = decodeString(bb);
		String attrId = decodeString(bb);
		int oldValueType = decodeType(bb);
		Object oldValue = decodeValue(bb, oldValueType);
		int newValueType = decodeType(bb);
		Object newValue = decodeValue(bb, newValueType);

		sendNodeAttributeChanged(sourceId, timeId, nodeId, attrId, oldValue, newValue);
	}

	/**
	 * @see NetStreamConstants#EVENT_ADD_NODE_ATTR
	 */
	protected void serve_EVENT_ADD_NODE_ATTR(ByteBuffer bb) {
		LOGGER.finest("NetStreamServer: Received EVENT_ADD_NODE_ATTR command.");

		String sourceId = decodeString(bb);
		long timeId = decodeUnsignedVarint(bb);
		String nodeId = decodeString(bb);
		String attrId = decodeString(bb);
		Object value = decodeValue(bb, decodeType(bb));

		sendNodeAttributeAdded(sourceId, timeId, nodeId, attrId, value);
	}

	/**
	 * @see NetStreamConstants#EVENT_DEL_GRAPH_ATTR
	 */
	protected void serve_EVENT_DEL_GRAPH_ATTR(ByteBuffer bb) {
		LOGGER.finest("NetStreamServer: Received EVENT_DEL_GRAPH_ATTR command.");

		String sourceId = decodeString(bb);
		long timeId = decodeUnsignedVarint(bb);
		String attrId = decodeString(bb);

		sendGraphAttributeRemoved(sourceId, timeId, attrId);
	}

	/**
	 * @see NetStreamConstants#EVENT_CHG_GRAPH_ATTR
	 */
	protected void serve_EVENT_CHG_GRAPH_ATTR(ByteBuffer bb) {
		LOGGER.finest("NetStreamServer: Received EVENT_CHG_GRAPH_ATTR command.");

		String sourceId = decodeString(bb);
		long timeId = decodeUnsignedVarint(bb);
		String attrId = decodeString(bb);
		int oldValueType = decodeType(bb);
		Object oldValue = decodeValue(bb, oldValueType);
		int newValueType = decodeType(bb);
		Object newValue = decodeValue(bb, newValueType);

		sendGraphAttributeChanged(sourceId, timeId, attrId, oldValue, newValue);
	}

	/**
	 * @see NetStreamConstants#EVENT_ADD_GRAPH_ATTR
	 */
	protected void serve_EVENT_ADD_GRAPH_ATTR(ByteBuffer bb) {
		LOGGER.finest("NetStreamServer: Received EVENT_ADD_GRAPH_ATTR command.");

		String sourceId = decodeString(bb);
		long timeId = decodeUnsignedVarint(bb);
		String attrId = decodeString(bb);
		Object value = decodeValue(bb, decodeType(bb));

		LOGGER.finest(String.format("NetStreamServer | EVENT_ADD_GRAPH_ATTR | %s=%s", attrId, value.toString()));

		sendGraphAttributeAdded(sourceId, timeId, attrId, value);
	}

	/**
	 * @see NetStreamConstants#EVENT_CLEARED
	 */
	protected void serve_EVENT_CLEARED(ByteBuffer bb) {
		LOGGER.finest("NetStreamServer: Received EVENT_CLEARED command.");

		String sourceId = decodeString(bb);
		long timeId = decodeUnsignedVarint(bb);

		sendGraphCleared(sourceId, timeId);
	}

	/**
	 * @see NetStreamConstants#EVENT_STEP
	 */
	protected void serve_EVENT_STEP(ByteBuffer bb) {
		LOGGER.finest("NetStreamServer: Received EVENT_STEP command.");

		String sourceId = decodeString(bb);
		long timeId = decodeUnsignedVarint(bb);
		double time = decodeDouble(bb);

		sendStepBegins(sourceId, timeId, time);
	}

	/**
	 * @see NetStreamConstants#EVENT_DEL_EDGE
	 */
	protected void serve_EVENT_DEL_EDGE(ByteBuffer bb) {
		LOGGER.finest("NetStreamServer: Received EVENT_DEL_EDGE command.");

		String sourceId = decodeString(bb);
		long timeId = decodeUnsignedVarint(bb);
		String edgeId = decodeString(bb);

		sendEdgeRemoved(sourceId, timeId, edgeId);
	}

	/**
	 * @see NetStreamConstants#EVENT_ADD_EDGE
	 */
	protected void serve_EVENT_ADD_EDGE(ByteBuffer bb) {
		LOGGER.finest("NetStreamServer: Received ADD_EDGE command.");

		String sourceId = decodeString(bb);
		long timeId = decodeUnsignedVarint(bb);
		String edgeId = decodeString(bb);
		String from = decodeString(bb);
		String to = decodeString(bb);
		boolean directed = decodeBoolean(bb);

		sendEdgeAdded(sourceId, timeId, edgeId, from, to, directed);
	}

	/**
	 * @see NetStreamConstants#EVENT_DEL_NODE
	 */
	protected void serve_DEL_NODE(ByteBuffer bb) {
		LOGGER.finest("NetStreamServer: Received DEL_NODE command.");

		String sourceId = decodeString(bb);
		long timeId = decodeUnsignedVarint(bb);
		String nodeId = decodeString(bb);

		sendNodeRemoved(sourceId, timeId, nodeId);
	}

	/**
	 * @see NetStreamConstants#EVENT_ADD_NODE
	 */
	protected void serve_EVENT_ADD_NODE(ByteBuffer bb) {
		LOGGER.finest("NetStreamServer: Received EVENT_ADD_NODE command");

		String sourceId = decodeString(bb);
		long timeId = decodeUnsignedVarint(bb);
		String nodeId = decodeString(bb);

		sendNodeAdded(sourceId, timeId, nodeId);
	}
}