org.apache.kafka.common.protocol.MessageUtil 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.kafka.common.protocol;
import java.nio.ByteBuffer;
import java.util.Iterator;
import java.util.UUID;
public final class MessageUtil {
public static final UUID ZERO_UUID = new UUID(0L, 0L);
/**
* Copy a byte buffer into an array. This will not affect the buffer's
* position or mark.
*/
public static byte[] byteBufferToArray(ByteBuffer buf) {
byte[] arr = new byte[buf.remaining()];
int prevPosition = buf.position();
try {
buf.get(arr);
} finally {
buf.position(prevPosition);
}
return arr;
}
public static String deepToString(Iterator iter) {
StringBuilder bld = new StringBuilder("[");
String prefix = "";
while (iter.hasNext()) {
Object object = iter.next();
bld.append(prefix);
bld.append(object.toString());
prefix = ", ";
}
bld.append("]");
return bld.toString();
}
}