/**
* 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.util;
import java.util.List;
import org.apache.camel.model.ChoiceType;
import org.apache.camel.model.ProcessorType;
import org.apache.camel.model.WhenType;
/**
* Helper class for ProcessorType and the other model classes.
*/
public final class ProcessorTypeHelper {
private ProcessorTypeHelper() {
}
/**
* Looks for the given type in the list of outputs and recurring all the children as well.
* Will stop at first found and return it.
*
* @param outputs list of outputs, can be null or empty.
* @param type the type to look for
* @return the first found type, or <tt>null</tt> if not found
*/
@SuppressWarnings("unchecked")
public static <T> T findFirstTypeInOutputs(List<ProcessorType<?>> outputs, Class<T> type) {
if (outputs == null || outputs.isEmpty()) {
return null;
}
for (ProcessorType out : outputs) {
if (type.isInstance(out)) {
return type.cast(out);
}
// special for choice
if (out instanceof ChoiceType) {
ChoiceType choice = (ChoiceType) out;
for (WhenType when : choice.getWhenClauses()) {
List<ProcessorType<?>> children = when.getOutputs();
T child = findFirstTypeInOutputs(children, type);
if (child != null) {
return child;
}
}
List<ProcessorType<?>> children = choice.getOtherwise().getOutputs();
if (children != null) {
T child = findFirstTypeInOutputs(children, type);
if (child != null) {
return child;
}
}
}
// try children as well
List<ProcessorType<?>> children = out.getOutputs();
T child = findFirstTypeInOutputs(children, type);
if (child != null) {
return child;
}
}
return null;
}
}