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The Core Camel Java DSL based router
/**
* 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.Iterator;
import java.util.NoSuchElementException;
/**
* Compound iterator to iterate over multiple iterators sequentially.
*/
public class CompoundIterator implements Iterator {
final Iterator> it;
Iterator current;
public CompoundIterator(Iterable> it) {
this(it.iterator());
}
public CompoundIterator(Iterator> it) {
this.it = it;
this.current = it.hasNext() ? it.next() : null;
}
@Override
public boolean hasNext() {
while (current != null) {
if (current.hasNext()) {
return true;
} else {
current = it.hasNext() ? it.next() : null;
}
}
return false;
}
@Override
public T next() {
if (current != null) {
return current.next();
}
throw new NoSuchElementException();
}
@Override
public void remove() {
current.remove();
}
}