/*
* Copyright 2014 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.data.hadoop.store.expression;
import java.util.List;
import org.springframework.core.convert.TypeDescriptor;
import org.springframework.expression.AccessException;
import org.springframework.expression.EvaluationContext;
import org.springframework.expression.MethodExecutor;
import org.springframework.expression.MethodResolver;
/**
* A {@link Message} specific {@link MethodResolver}.
*
* @author Janne Valkealahti
*
*/
public class MessagePartitionKeyMethodResolver extends PartitionKeyMethodResolver {
/**
* Create a {@link MethodExecutor} using {@link MessageDateFormatMethodExecutor}.
*
* @param context the current evaluation context
* @param targetObject the object upon which the method is being called
* @param argumentTypes the arguments that the constructor must be able to handle
* @return a MessageDateFormatMethodExecutor
* @throws AccessException the access exception
*/
protected MethodExecutor doDateFormat(EvaluationContext context, Object targetObject, String name,
List<TypeDescriptor> argumentTypes) throws AccessException {
if (argumentTypes.size() == 1) {
return new MessageDateFormatMethodExecutor("timestamp");
} else if (argumentTypes.size() == 2 || argumentTypes.size()==3) {
return new MessageDateFormatMethodExecutor();
} else {
throw new AccessException("Too many or missing arguments");
}
}
}