org.apache.flink.runtime.executiongraph.AllVerticesIterator Maven / Gradle / Ivy
/*
* 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.flink.runtime.executiongraph;
import java.util.Iterator;
import java.util.NoSuchElementException;
class AllVerticesIterator implements Iterator {
private final Iterator jobVertices;
private ExecutionVertex[] currVertices;
private int currPos;
public AllVerticesIterator(Iterator jobVertices) {
this.jobVertices = jobVertices;
}
@Override
public boolean hasNext() {
while (true) {
if (currVertices != null) {
if (currPos < currVertices.length) {
return true;
} else {
currVertices = null;
}
}
else if (jobVertices.hasNext()) {
currVertices = jobVertices.next().getTaskVertices();
currPos = 0;
}
else {
return false;
}
}
}
@Override
public ExecutionVertex next() {
if (hasNext()) {
return currVertices[currPos++];
} else {
throw new NoSuchElementException();
}
}
@Override
public void remove() {
throw new UnsupportedOperationException();
}
}