org.elasticsearch.common.Numbers Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of elasticsearch Show documentation
Show all versions of elasticsearch Show documentation
Elasticsearch subproject :server
/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.common;
import org.apache.lucene.util.BytesRef;
/**
* A set of utilities for numbers.
*/
public final class Numbers {
private Numbers() {
}
/**
* Converts a byte array to an short.
*
* @param arr The byte array to convert to an short
* @return The int converted
*/
public static short bytesToShort(byte[] arr) {
return (short) (((arr[0] & 0xff) << 8) | (arr[1] & 0xff));
}
public static short bytesToShort(BytesRef bytes) {
return (short) (((bytes.bytes[bytes.offset] & 0xff) << 8) | (bytes.bytes[bytes.offset + 1] & 0xff));
}
/**
* Converts a byte array to an int.
*
* @param arr The byte array to convert to an int
* @return The int converted
*/
public static int bytesToInt(byte[] arr) {
return (arr[0] << 24) | ((arr[1] & 0xff) << 16) | ((arr[2] & 0xff) << 8) | (arr[3] & 0xff);
}
public static int bytesToInt(BytesRef bytes) {
return (bytes.bytes[bytes.offset] << 24) | ((bytes.bytes[bytes.offset + 1] & 0xff) << 16) | ((bytes.bytes[bytes.offset + 2] & 0xff) << 8) | (bytes.bytes[bytes.offset + 3] & 0xff);
}
/**
* Converts a byte array to a long.
*
* @param arr The byte array to convert to a long
* @return The long converter
*/
public static long bytesToLong(byte[] arr) {
int high = (arr[0] << 24) | ((arr[1] & 0xff) << 16) | ((arr[2] & 0xff) << 8) | (arr[3] & 0xff);
int low = (arr[4] << 24) | ((arr[5] & 0xff) << 16) | ((arr[6] & 0xff) << 8) | (arr[7] & 0xff);
return (((long) high) << 32) | (low & 0x0ffffffffL);
}
public static long bytesToLong(BytesRef bytes) {
int high = (bytes.bytes[bytes.offset + 0] << 24) | ((bytes.bytes[bytes.offset + 1] & 0xff) << 16) | ((bytes.bytes[bytes.offset + 2] & 0xff) << 8) | (bytes.bytes[bytes.offset + 3] & 0xff);
int low = (bytes.bytes[bytes.offset + 4] << 24) | ((bytes.bytes[bytes.offset + 5] & 0xff) << 16) | ((bytes.bytes[bytes.offset + 6] & 0xff) << 8) | (bytes.bytes[bytes.offset + 7] & 0xff);
return (((long) high) << 32) | (low & 0x0ffffffffL);
}
/**
* Converts a byte array to float.
*
* @param arr The byte array to convert to a float
* @return The float converted
*/
public static float bytesToFloat(byte[] arr) {
return Float.intBitsToFloat(bytesToInt(arr));
}
public static float bytesToFloat(BytesRef bytes) {
return Float.intBitsToFloat(bytesToInt(bytes));
}
/**
* Converts a byte array to double.
*
* @param arr The byte array to convert to a double
* @return The double converted
*/
public static double bytesToDouble(byte[] arr) {
return Double.longBitsToDouble(bytesToLong(arr));
}
public static double bytesToDouble(BytesRef bytes) {
return Double.longBitsToDouble(bytesToLong(bytes));
}
/**
* Converts an int to a byte array.
*
* @param val The int to convert to a byte array
* @return The byte array converted
*/
public static byte[] intToBytes(int val) {
byte[] arr = new byte[4];
arr[0] = (byte) (val >>> 24);
arr[1] = (byte) (val >>> 16);
arr[2] = (byte) (val >>> 8);
arr[3] = (byte) (val);
return arr;
}
/**
* Converts an int to a byte array.
*
* @param val The int to convert to a byte array
* @return The byte array converted
*/
public static byte[] shortToBytes(int val) {
byte[] arr = new byte[2];
arr[0] = (byte) (val >>> 8);
arr[1] = (byte) (val);
return arr;
}
/**
* Converts a long to a byte array.
*
* @param val The long to convert to a byte array
* @return The byte array converted
*/
public static byte[] longToBytes(long val) {
byte[] arr = new byte[8];
arr[0] = (byte) (val >>> 56);
arr[1] = (byte) (val >>> 48);
arr[2] = (byte) (val >>> 40);
arr[3] = (byte) (val >>> 32);
arr[4] = (byte) (val >>> 24);
arr[5] = (byte) (val >>> 16);
arr[6] = (byte) (val >>> 8);
arr[7] = (byte) (val);
return arr;
}
/**
* Converts a float to a byte array.
*
* @param val The float to convert to a byte array
* @return The byte array converted
*/
public static byte[] floatToBytes(float val) {
return intToBytes(Float.floatToRawIntBits(val));
}
/**
* Converts a double to a byte array.
*
* @param val The double to convert to a byte array
* @return The byte array converted
*/
public static byte[] doubleToBytes(double val) {
return longToBytes(Double.doubleToRawLongBits(val));
}
}