com.datatorrent.lib.math.SingleVariableAbstractCalculus Maven / Gradle / Ivy
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 com.datatorrent.lib.math;
import com.datatorrent.api.DefaultInputPort;
/**
* Transforms the input into the output after applying appropriate mathematical function to it and emits result on respective ports.
*
* Emits the result as Long on port "longResult", as Integer on port "integerResult",as Double on port "doubleResult", and as Float on port "floatResult".
* This is a pass through operator
*
* Ports:
* input: expects Number
* longResult: emits Long
* integerResult: emits Integer
* doubleResult: emits Double
* floatResult: emits Float
* @displayName Single Variable Abstract Calculus
* @category Math
* @tags numeric, single variable
* @param
* @since 0.3.2
*/
public abstract class SingleVariableAbstractCalculus extends AbstractOutput
{
/**
* Input number port.
*/
public final transient DefaultInputPort input = new DefaultInputPort()
{
@Override
public void process(Number tuple)
{
Double dResult = null;
if (doubleResult.isConnected()) {
doubleResult.emit(dResult = function(tuple.doubleValue()));
}
if (floatResult.isConnected()) {
floatResult.emit(dResult == null ? (float)function(tuple.doubleValue()) : dResult.floatValue());
}
Long lResult = null;
if (longResult.isConnected()) {
longResult.emit(lResult = function(tuple.longValue()));
}
if (integerResult.isConnected()) {
integerResult.emit(lResult == null ? (int)function(tuple.longValue()) : lResult.intValue());
}
}
};
/**
* Transform the input into the output after applying appropriate mathematical function to it.
*
* @param val
* @return result of the function (double)
*/
public abstract double function(double val);
/**
* Transform the input into the output after applying appropriate mathematical function to it.
* @param val
* @return result of the function (long)
*/
public abstract long function(long val);
}