| 1 | /* |
| 2 | * Copyright 2006-2007 the original author or authors. |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package org.springframework.batch.classify; |
| 18 | |
| 19 | /** |
| 20 | * Base class for {@link Classifier} implementations. Provides default behaviour |
| 21 | * and some convenience members, like constants. |
| 22 | * |
| 23 | * @author Dave Syer |
| 24 | * |
| 25 | */ |
| 26 | public class ClassifierSupport<C, T> implements Classifier<C, T> { |
| 27 | |
| 28 | final private T defaultValue; |
| 29 | |
| 30 | /** |
| 31 | * @param defaultValue |
| 32 | */ |
| 33 | public ClassifierSupport(T defaultValue) { |
| 34 | super(); |
| 35 | this.defaultValue = defaultValue; |
| 36 | } |
| 37 | |
| 38 | /** |
| 39 | * Always returns the default value. This is the main extension point for |
| 40 | * subclasses, so it must be able to classify null. |
| 41 | * |
| 42 | * @see org.springframework.batch.classify.Classifier#classify(Object) |
| 43 | */ |
| 44 | public T classify(C throwable) { |
| 45 | return defaultValue; |
| 46 | } |
| 47 | |
| 48 | } |