/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.camel.component.reactive.streams.util;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.function.Function;
import org.apache.camel.Exchange;
public final class BodyConverter<T> implements Function<Exchange, T> {
private static final ConcurrentMap<Class<?>, BodyConverter<?>> CACHE = new ConcurrentHashMap<>();
private final Class<T> type;
BodyConverter(Class<T> type) {
this.type = type;
}
@Override
public T apply(Exchange exchange) {
T answer;
if (exchange.hasOut()) {
answer = exchange.getOut().getBody(type);
} else {
answer = exchange.getIn().getBody(type);
}
return answer;
}
public static <C> BodyConverter<C> forType(Class<C> type) {
return BodyConverter.class.cast(
CACHE.computeIfAbsent(type, BodyConverter::new)
);
}
}