| /* |
| * Copyright (c) 2013 DataTorrent, Inc. ALL Rights Reserved. |
| * |
| * 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 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. |
| * <p> |
| * 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<br> |
| * <br> |
| * <b>Ports</b>:<br> |
| * <b>input</b>: expects Number<br> |
| * <b>longResult</b>: emits Long<br> |
| * <b>integerResult</b>: emits Integer<br> |
| * <b>doubleResult</b>: emits Double<br> |
| * <b>floatResult</b>: emits Float<br> |
| * @displayName Single Variable Abstract Calculus |
| * @category Math |
| * @tags numeric, single variable |
| * @param <T> |
| * @since 0.3.2 |
| */ |
| public abstract class SingleVariableAbstractCalculus extends AbstractOutput |
| { |
| /** |
| * Input number port. |
| */ |
| public final transient DefaultInputPort<Number> input = new DefaultInputPort<Number>() |
| { |
| @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); |
| |
| } |