org.springframework.batch.classify.BinaryExceptionClassifier Maven / Gradle / Ivy
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The Spring Batch Infrastructure is a set of low-level components, interfaces and tools for batch processing applications and optimisations.
/*
* Copyright 2006-2007 the original author or authors.
*
* 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 org.springframework.batch.classify;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
/**
* A {@link Classifier} for exceptions that has only two classes (true and
* false). Classifies objects according to their inheritance relation with the
* supplied types. If the object to be classified is one of the provided types,
* or is a subclass of one of the types, then the non-default value is returned
* (usually true).
*
* @see SubclassClassifier
*
* @author Dave Syer
*
*/
public class BinaryExceptionClassifier extends SubclassClassifier {
/**
* Create a binary exception classifier with the provided default value. All
* exceptions will classify as this value unless
* {@link #setTypes(Collection)} is used to narrow the field.
*
* @param defaultValue defaults to false
*/
public BinaryExceptionClassifier(boolean defaultValue) {
super(defaultValue);
}
/**
* Create a binary exception classifier with the default value (false). All
* exceptions will classify as false.
*/
public BinaryExceptionClassifier() {
this(false);
}
/**
* Create a binary exception classifier with the provided classes and their
* subclasses. The mapped value for these exceptions will be the one
* provided (which will be the opposite of the default).
* @param value
*/
public BinaryExceptionClassifier(Collection> exceptionClasses, boolean value) {
this(!value);
if (exceptionClasses!=null) setTypes(exceptionClasses);
}
/**
* Create a binary exception classifier with the default value false and
* value mapping true for the provided classes and their subclasses.
*/
public BinaryExceptionClassifier(Collection> exceptionClasses) {
this(exceptionClasses, true);
}
/**
* Set of Throwable class types to keys for the classifier. Any subclass of
* the type provided will be classified as of non-default type.
*
* @param types the types to classify as non-default
*/
public final void setTypes(Collection> types) {
Map, Boolean> map = new HashMap, Boolean>();
for (Class type : types) {
map.put(type, !getDefault());
}
setTypeMap(map);
}
}