org.apache.kafka.streams.kstream.internals.KStreamFilter Maven / Gradle / Ivy
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* 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,
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package org.apache.kafka.streams.kstream.internals;
import org.apache.kafka.streams.kstream.Predicate;
import org.apache.kafka.streams.processor.api.ContextualFixedKeyProcessor;
import org.apache.kafka.streams.processor.api.FixedKeyProcessor;
import org.apache.kafka.streams.processor.api.FixedKeyProcessorSupplier;
import org.apache.kafka.streams.processor.api.FixedKeyRecord;
class KStreamFilter implements FixedKeyProcessorSupplier {
private final Predicate predicate;
private final boolean filterNot;
public KStreamFilter(final Predicate predicate, final boolean filterNot) {
this.predicate = predicate;
this.filterNot = filterNot;
}
@Override
public FixedKeyProcessor get() {
return new KStreamFilterProcessor();
}
private class KStreamFilterProcessor extends ContextualFixedKeyProcessor {
@Override
public void process(final FixedKeyRecord record) {
if (filterNot ^ predicate.test(record.key(), record.value())) {
context().forward(record);
}
}
}
}