/*
* 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.kafka.connect.runtime;
import org.apache.kafka.connect.connector.ConnectRecord;
import org.apache.kafka.connect.transforms.Transformation;
import java.util.Collections;
import java.util.List;
import java.util.Objects;
public class TransformationChain<R extends ConnectRecord<R>> {
private final List<Transformation<R>> transformations;
public TransformationChain(List<Transformation<R>> transformations) {
this.transformations = transformations;
}
public R apply(R record) {
if (transformations.isEmpty()) return record;
for (Transformation<R> transformation : transformations) {
record = transformation.apply(record);
if (record == null) break;
}
return record;
}
public void close() {
for (Transformation<R> transformation : transformations) {
transformation.close();
}
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
TransformationChain that = (TransformationChain) o;
return Objects.equals(transformations, that.transformations);
}
@Override
public int hashCode() {
return Objects.hash(transformations);
}
public static <R extends ConnectRecord<R>> TransformationChain<R> noOp() {
return new TransformationChain<R>(Collections.<Transformation<R>>emptyList());
}
}