/**
* 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.tajo.util;
public class NumberUtil {
public static long unsigned32(int n) {
return n & 0xFFFFFFFFL;
}
public static int unsigned16(short n) {
return n & 0xFFFF;
}
public static byte[] toAsciiBytes(Number i){
return Bytes.toASCIIBytes(String.valueOf(i).toCharArray());
}
public static byte[] toAsciiBytes(short i){
return Bytes.toASCIIBytes(String.valueOf(i).toCharArray());
}
public static byte[] toAsciiBytes(int i){
return Bytes.toASCIIBytes(String.valueOf(i).toCharArray());
}
public static byte[] toAsciiBytes(long i){
return Bytes.toASCIIBytes(String.valueOf(i).toCharArray());
}
public static byte[] toAsciiBytes(float i){
return Bytes.toASCIIBytes(String.valueOf(i).toCharArray());
}
public static byte[] toAsciiBytes(double i){
return Bytes.toASCIIBytes(String.valueOf(i).toCharArray());
}
private static void benchmark(int num){
System.out.println("Start benchmark. # of :" + num);
long start = System.currentTimeMillis();
byte[] bytes;
long size = 0;
for (int i = 0; i < num; i ++){
bytes = String.valueOf(i).getBytes();
size += bytes.length;
}
long end = System.currentTimeMillis();
System.out.println("JDK getBytes() \t\t\t\t" + (end - start) + " ms, " + "Total: " + size / (1024 * 1024) + "MB");
size = 0;
for (int i = 0; i < num; i ++){
bytes = toAsciiBytes(i);
size += bytes.length;
}
System.out.println( "NumberUtil toByte() \t" + (System.currentTimeMillis() - end)
+ " ms, " + "Total: " + size / (1024 * 1024) + "MB");
}
public static void main(String[] args) throws Exception {
benchmark(1024 * 1024 * 10);
}
}