/***********************************************************************************************************************
*
* Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
*
* Licensed 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 eu.stratosphere.api.common.operators;
import eu.stratosphere.api.common.functions.AbstractFunction;
import eu.stratosphere.api.common.operators.util.UserCodeClassWrapper;
/**
* This operator represents a Union between two inputs.
*/
public class Union<T> extends DualInputOperator<T, T, T, AbstractFunction> {
private final static String NAME = "Union";
/**
* Creates a new Union operator.
*/
public Union(BinaryOperatorInformation<T, T, T> operatorInfo) {
// we pass it an AbstractFunction, because currently all operators expect some form of UDF
super(new UserCodeClassWrapper<AbstractFunction>(AbstractFunction.class), operatorInfo, NAME);
}
public Union(Operator<T> input1, Operator<T> input2) {
this(new BinaryOperatorInformation<T, T, T>(input1.getOperatorInfo().getOutputType(),
input1.getOperatorInfo().getOutputType(), input1.getOperatorInfo().getOutputType()));
setFirstInput(input1);
setSecondInput(input2);
}
}