/*
* Copyright 2006-2009 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.core.step.item;
import java.lang.reflect.Constructor;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* @author Dan Garrette
* @since 2.0.1
*/
public abstract class AbstractExceptionThrowingItemHandlerStub<T> {
protected Log logger = LogFactory.getLog(getClass());
private Collection<T> failures = Collections.emptyList();
private Constructor<? extends Throwable> exception;
public AbstractExceptionThrowingItemHandlerStub() throws Exception {
exception = SkippableRuntimeException.class.getConstructor(String.class);
}
public void setFailures(T... failures) {
this.failures = new ArrayList<T>(Arrays.asList(failures));
}
public void setExceptionType(Class<? extends Throwable> exceptionType) throws Exception {
try {
exception = exceptionType.getConstructor(String.class);
}
catch (NoSuchMethodException e) {
try {
exception = exceptionType.getConstructor(String.class, Throwable.class);
}
catch (NoSuchMethodException ex) {
exception = exceptionType.getConstructor(Object.class);
}
}
}
public void clearFailures() {
failures.clear();
}
protected void checkFailure(T item) throws Exception {
if (isFailure(item)) {
Throwable t = getException("Intended Failure: " + item);
if (t instanceof Exception) {
throw (Exception) t;
}
if (t instanceof Error) {
throw (Error) t;
}
throw new IllegalStateException("Unexpected non-Error Throwable");
}
}
private Throwable getException(String string) throws Exception {
if (exception.getParameterTypes().length==1) {
return exception.newInstance(string);
}
return exception.newInstance(string, new RuntimeException("Planned"));
}
protected boolean isFailure(T item) {
return this.failures.contains(item);
}
}