io.netty.channel.group.CombinedIterator Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* Copyright 2012 The Netty Project
*
* The Netty Project 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:
*
* https://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 io.netty.channel.group;
import io.netty.util.internal.ObjectUtil;
import java.util.Iterator;
import java.util.NoSuchElementException;
/**
*/
final class CombinedIterator implements Iterator {
private final Iterator i1;
private final Iterator i2;
private Iterator currentIterator;
CombinedIterator(Iterator i1, Iterator i2) {
this.i1 = ObjectUtil.checkNotNull(i1, "i1");
this.i2 = ObjectUtil.checkNotNull(i2, "i2");
this.currentIterator = i1;
}
@Override
public boolean hasNext() {
for (;;) {
if (currentIterator.hasNext()) {
return true;
}
if (currentIterator == i1) {
currentIterator = i2;
} else {
return false;
}
}
}
@Override
public E next() {
for (;;) {
try {
return currentIterator.next();
} catch (NoSuchElementException e) {
if (currentIterator == i1) {
currentIterator = i2;
} else {
throw e;
}
}
}
}
@Override
public void remove() {
currentIterator.remove();
}
}