/*
 *  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;

import java.util.List;

import com.rapidminer.operator.IOObject;
import com.rapidminer.operator.ResultObject;
import com.rapidminer.operator.ports.metadata.MDTransformationRule;
import com.rapidminer.operator.ports.metadata.MetaData;
import com.rapidminer.operator.ports.metadata.OneToManyPassThroughRule;

/** Does the same as its superclass but provides also a method to generate
 *  a meta data transformation rule that copies from an input to all
 *  generated output ports.
 * 
 *  @author Simon Fischer 
 * 
 */
public class OutputPortExtender extends SinglePortExtender<OutputPort> {

	public OutputPortExtender(String name, Ports<OutputPort> ports) {
		super(name, ports);
	}
	
	/** The generated rule copies all meta data from the input port to all generated output ports. */
	public MDTransformationRule makePassThroughRule(InputPort inputPort) {
		return new OneToManyPassThroughRule(inputPort, getManagedPorts());
	}

	public void deliverToAll(IOObject data, boolean clone) {
		for (OutputPort port : getManagedPorts()) {
			if (clone) {
				port.deliver(data.copy());
			} else {
				port.deliver(data);
			}
		}
	}

	public void deliver(List<? extends IOObject> inputs) {
		int i = 0;
		for (OutputPort port : getManagedPorts()) {
			if (port.isConnected()) {
				if (i >= inputs.size()) {
					getPorts().getOwner().getOperator().getLogger().fine("Insufficient input for "+port.getSpec());
				} else {
					IOObject input = inputs.get(i);
					port.deliver(input);
					String name;
					if (input instanceof ResultObject) {
						name = ((ResultObject)input).getName();
					} else {
						name = input.getClass().getName();
					}
					name += " ("+input.getSource()+")";
					getPorts().getOwner().getOperator().getLogger().fine("Delivering " + name + " to " + port.getSpec());
				}
				i++;
			}
		}		
	}
	
	public void deliverMetaData(List<MetaData> inputMD) {
		int i = 0;
		for (OutputPort port : getManagedPorts()) {
			if (port.isConnected()) {
				if (i < inputMD.size()) {
					port.deliverMD(inputMD.get(i));
				}
				i++;
			}
		}		
	}
	
}