org.apache.hadoop.hive.ql.exec.vector.mapjoin.fast.VectorMapJoinFastBytesHashUtil 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.hadoop.hive.ql.exec.vector.mapjoin.fast;
import org.apache.hadoop.hive.serde2.WriteBuffers;
public class VectorMapJoinFastBytesHashUtil {
public static long hashKey(byte[] bytes, int start, int length) {
return WriteBuffers.murmurHash(bytes, start, length);
}
public static String displayBytes(byte[] bytes, int start, int length) {
StringBuilder sb = new StringBuilder();
for (int i = start; i < start + length; i++) {
char ch = (char) bytes[i];
if (ch < ' ' || ch > '~') {
sb.append(String.format("\\%03d", (int) (bytes[i] & 0xff)));
} else {
sb.append(ch);
}
}
return sb.toString();
}
}