com.swirlds.common.test.stream.ObjectForTestStreamGenerator Maven / Gradle / Ivy
/*
* Copyright (C) 2016-2023 Hedera Hashgraph, LLC
*
* Licensed 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 com.swirlds.common.test.stream;
import java.time.Instant;
import java.util.Iterator;
import java.util.NoSuchElementException;
public class ObjectForTestStreamGenerator {
/**
* number of objects to be generated
*/
private int totalNum;
/**
* interval in ms between each two adjacent objects to be generated
*/
private int intervalMs;
/**
* timeStamp of the next object
*/
private Instant nextTimestamp;
/**
* idx of next object;
*/
private int idx;
/**
* @param totalNum
*/
public ObjectForTestStreamGenerator(int totalNum, int intervalMs, Instant firstTimestamp) {
this.totalNum = totalNum;
this.intervalMs = intervalMs;
nextTimestamp = firstTimestamp;
}
Iterator getIterator() {
return new Iterator<>() {
@Override
public boolean hasNext() {
return idx < totalNum;
}
@Override
public ObjectForTestStream next() {
if (!hasNext()) {
throw new NoSuchElementException();
}
ObjectForTestStream object = new ObjectForTestStream(idx, nextTimestamp);
idx++;
nextTimestamp = nextTimestamp.plusMillis(intervalMs);
return object;
}
};
}
}