/*
* RapidMiner
*
* Copyright (C) 2001-2008 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;
import com.rapidminer.operator.condition.InnerOperatorCondition;
import com.rapidminer.operator.condition.SimpleChainInnerOperatorCondition;
/**
* A simple operator chain which can have an arbitrary number of inner
* operators. The operators are subsequently applied and their output is used as
* input for the succeeding operator. The input of the operator chain is used as
* input for the first inner operator and the output of the last operator is
* used as the output of the operator chain.
*
* @author Ingo Mierswa, Simon Fischer
* @version $Id: SimpleOperatorChain.java,v 2.19 2006/04/14 11:42:27 ingomierswa
* Exp $
*/
final public class SimpleOperatorChain extends OperatorChain {
/** Creates an empty operator chain. */
public SimpleOperatorChain(OperatorDescription description) {
super(description);
}
/**
* Returns true since this operator chain should just return the output of
* the last inner operator.
*/
public boolean shouldReturnInnerOutput() {
return true;
}
/** Returns a simple chain condition. */
public InnerOperatorCondition getInnerOperatorCondition() {
return new SimpleChainInnerOperatorCondition();
}
/**
* Returns the highest possible value for the maximum number of innner
* operators.
*/
public int getMaxNumberOfInnerOperators() {
return Integer.MAX_VALUE;
}
/** Returns 0 for the minimum number of innner operators. */
public int getMinNumberOfInnerOperators() {
return 0;
}
/**
* Since the apply methods of the inner operators already add additional
* output, the handle additional output method should simply return a new
* container which is build from the additional output objects. Therefore
* this method returns true.
*/
public boolean getAddOnlyAdditionalOutput() {
return true;
}
public Class<?>[] getInputClasses() {
return new Class[0];
}
public Class<?>[] getOutputClasses() {
return new Class[0];
}
}