org.springframework.kafka.requestreply.CorrelationKey Maven / Gradle / Ivy
/*
* Copyright 2018-2019 the original author or authors.
*
* 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
*
* 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 org.springframework.kafka.requestreply;
import java.math.BigInteger;
import java.util.Arrays;
import org.springframework.util.Assert;
/**
* Wrapper for byte[] that can be used as a hash key. We could have used BigInteger
* instead but this wrapper is much less expensive. We do use a BigInteger in
* {@link #toString()} though.
*
* @author Gary Russell
* @since 2.1.3
*/
public final class CorrelationKey {
private final byte[] correlationId;
private volatile Integer hashCode;
public CorrelationKey(byte[] correlationId) { // NOSONAR array reference
Assert.notNull(correlationId, "'correlationId' cannot be null");
this.correlationId = correlationId; // NOSONAR array reference
}
public byte[] getCorrelationId() {
return this.correlationId; // NOSONAR
}
@Override
public int hashCode() {
if (this.hashCode != null) {
return this.hashCode;
}
final int prime = 31;
int result = 1;
result = prime * result + Arrays.hashCode(this.correlationId);
this.hashCode = result;
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
CorrelationKey other = (CorrelationKey) obj;
if (!Arrays.equals(this.correlationId, other.correlationId)) {
return false;
}
return true;
}
@Override
public String toString() {
return "[" + new BigInteger(this.correlationId) + "]";
}
}