/*
 *  RapidMiner
 *
 *  Copyright (C) 2001-2011 by Rapid-I and the contributors
 *
 *  Complete list of developers available at our web site:
 *
 *       http://rapid-i.com
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License 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 Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see http://www.gnu.org/licenses/.
 */
package com.rapidminer.operator.ports.metadata;

import java.util.Collections;
import java.util.List;

import com.rapidminer.operator.ports.InputPort;
import com.rapidminer.operator.ports.OutputPort;
import com.rapidminer.operator.ports.Port;
import com.rapidminer.operator.ports.PortOwner;
import com.rapidminer.operator.ports.quickfix.DisconnectQuickFix;
import com.rapidminer.operator.ports.quickfix.QuickFix;


/** Indicates that the process data flow contains a loop.
 * 
 * @author Simon Fischer
 *
 */
public class OperatorLoopError implements MetaDataError {

	private OutputPort outputPort;
	private InputPort inputPort;
	private Port port;
	
	private final QuickFix fix;
	
	public OperatorLoopError(InputPort port) {
		this.port = port;
		this.inputPort = port;		
		this.outputPort = port.getSource();		
		fix = new DisconnectQuickFix(outputPort, inputPort);
	}
	
	public OperatorLoopError(OutputPort port) {
		this.port = port;
		this.outputPort = port;
		this.inputPort = port.getDestination();
		fix = new DisconnectQuickFix(outputPort, inputPort);
	}

	@Override
	public String getMessage() {
		return "This port is part of a loop.";
	}

	@Override
	public PortOwner getOwner() {		
		return port.getPorts().getOwner();
	}

	@Override
	public Port getPort() {
		return port;
	}

	@Override
	public List<QuickFix> getQuickFixes() {
		return Collections.singletonList(fix);		
	}

	@Override
	public Severity getSeverity() {
		return Severity.ERROR;
	}
}