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/*
* ============LICENSE_START=======================================================
* ONAP
* ================================================================================
* Copyright (C) 2018 AT&T Intellectual Property. 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.
* ============LICENSE_END=========================================================
*/
package org.onap.policy.drools.pooling.extractor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Used to extract an object by invoking a method on the container.
*/
public class MethodExtractor implements Extractor {
private static final Logger logger = LoggerFactory.getLogger(MethodExtractor.class);
/**
* Method to invoke to extract the contained object.
*/
private final Method method;
/**
* Constructor.
*
* @param method method to invoke to extract the contained object
*/
public MethodExtractor(Method method) {
this.method = method;
}
@Override
public Object extract(Object object) {
try {
return method.invoke(object);
} catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
logger.warn("cannot invoke {} on {}", method.getName(), object.getClass(), e);
return null;
}
}
}
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