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/**
* Copyright 2017-2019 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
*
* 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 com.ardikars.common.util;
import com.ardikars.common.annotation.Helper;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
/**
* Bytes utility.
*
* @author Ardika Rommy Sanjaya
* @since 1.0.0
*/
@Helper
public final class Bytes {
public Bytes() { }
/**
* Byte to byte array.
* @param value value.
* @return byte array.
* @since 1.0.0
*/
public static byte[] toByteArray(final byte value) {
return new byte[] { value };
}
/**
* Short to byte array.
* @param value value.
* @return byte array.
* @since 1.0.0
*/
public static byte[] toByteArray(final short value) {
return toByteArray(value, ByteOrder.BIG_ENDIAN);
}
/**
* Short to byte array.
* @param value value.
* @param bo byte order.
* @return byte array.
* @since 1.0.0
*/
public static byte[] toByteArray(final short value, final ByteOrder bo) {
if (bo.equals(ByteOrder.BIG_ENDIAN)) {
return new byte[] { (byte) ((value >> 0) & 0xff), (byte) ((value >> 8) & 0xff) };
} else {
return new byte[] { (byte) ((value >> 8) & 0xff), (byte) ((value >> 0) & 0xff) };
}
}
/**
* Short array to byte array.
* @param value value.
* @return byte array.
* @since 1.0.0
*/
public static byte[] toByteArray(final short[] value) {
return toByteArray(value, ByteOrder.BIG_ENDIAN);
}
/**
* Short array to byte array.
* @param value value.
* @param bo byte order.
* @return byte array.
* @since 1.0.0
*/
public static byte[] toByteArray(final short[] value, final ByteOrder bo) {
return toByteArray(value, 0, value.length, bo);
}
/**
* Short array to byte array.
* @param value value.
* @param offset offset.
* @param length length.
* @param bo byte order.
* @return byte array.
* @since 1.0.0
*/
public static byte[] toByteArray(final short[] value, final int offset, final int length, final ByteOrder bo) {
Validate.notInBounds(value, offset, length);
byte[] array = new byte[length << 1];
if (bo.equals(ByteOrder.BIG_ENDIAN)) {
for (int i = offset; i < length; i++) {
short x = value[i];
int j = i << 1;
array[j++] = (byte) ((x >> 0) & 0xff);
array[j++] = (byte) ((x >> 8) & 0xff);
}
return array;
} else {
for (int i = offset; i < length; i++) {
short x = value[i];
int j = i << 1;
array[j++] = (byte) ((x >> 8) & 0xff);
array[j++] = (byte) ((x >> 0) & 0xff);
}
return array;
}
}
/**
* Int to byte array.
* @param value value.
* @return byte array.
* @since 1.0.0
*/
public static byte[] toByteArray(final int value) {
return toByteArray(value, ByteOrder.BIG_ENDIAN);
}
/**
* Int to byte array.
* @param value value.
* @param bo byte order.
* @return byte array.
* @since 1.0.0
*/
public static byte[] toByteArray(final int value, final ByteOrder bo) {
if (bo.equals(ByteOrder.BIG_ENDIAN)) {
return new byte[] {
(byte) ((value >> 0) & 0xff),
(byte) ((value >> 8) & 0xff),
(byte) ((value >> 16 & 0xff)),
(byte) ((value >> 24 & 0xff))
};
} else {
return new byte[] {
(byte) ((value >> 24) & 0xff),
(byte) ((value >> 16) & 0xff),
(byte) ((value >> 8) & 0xff),
(byte) ((value >> 0) & 0xff)
};
}
}
/**
* Int array to byte array.
* @param value value.
* @return byte array.
* @since 1.0.0
*/
public static byte[] toByteArray(final int[] value) {
return toByteArray(value, ByteOrder.BIG_ENDIAN);
}
/**
* Int array to byte array.
* @param value value.
* @param bo byte order.
* @return byte array.
* @since 1.0.0
*/
public static byte[] toByteArray(final int[] value, final ByteOrder bo) {
return toByteArray(value, 0, value.length, bo);
}
/**
* Int array to byte array.
* @param value value.
* @param offset offset.
* @param length length.
* @param bo byte order.
* @return byte array.
* @since 1.0.0
*/
public static byte[] toByteArray(final int[] value, final int offset, final int length, final ByteOrder bo) {
Validate.notInBounds(value, offset, length);
byte[] array = new byte[length << 2];
if (bo.equals(ByteOrder.BIG_ENDIAN)) {
for (int i = offset; i < length; i++) {
int x = value[i];
int j = i << 2;
array[j++] = (byte) ((x >> 0) & 0xff);
array[j++] = (byte) ((x >> 8) & 0xff);
array[j++] = (byte) ((x >> 16) & 0xff);
array[j++] = (byte) ((x >> 24) & 0xff);
}
return array;
} else {
for (int i = offset; i < length; i++) {
int x = value[i];
int j = i << 2;
array[j++] = (byte) ((x >> 24) & 0xff);
array[j++] = (byte) ((x >> 16) & 0xff);
array[j++] = (byte) ((x >> 8) & 0xff);
array[j++] = (byte) ((x >> 0) & 0xff);
}
return array;
}
}
/**
* Long to byte array.
* @param value value.
* @return byte array.
* @since 1.0.0
*/
public static byte[] toByteArray(final long value) {
return toByteArray(value, ByteOrder.BIG_ENDIAN);
}
/**
* Long to byte array.
* @param value value.
* @param bo byte order.
* @return byte array.
* @since 1.0.0
*/
public static byte[] toByteArray(final long value, final ByteOrder bo) {
if (bo.equals(ByteOrder.BIG_ENDIAN)) {
return new byte[] {
(byte) ((value >> 0) & 0xff),
(byte) ((value >> 8) & 0xff),
(byte) ((value >> 16) & 0xff),
(byte) ((value >> 24) & 0xff),
(byte) ((value >> 32) & 0xff),
(byte) ((value >> 40) & 0xff),
(byte) ((value >> 48) & 0xff),
(byte) ((value >> 56) & 0xff)
};
} else {
return new byte[] {
(byte) ((value >> 56) & 0xff),
(byte) ((value >> 48) & 0xff),
(byte) ((value >> 40) & 0xff),
(byte) ((value >> 32) & 0xff),
(byte) ((value >> 24) & 0xff),
(byte) ((value >> 16) & 0xff),
(byte) ((value >> 8) & 0xff),
(byte) ((value >> 0) & 0xff)
};
}
}
/**
* Long array to byte array.
* @param value value.
* @return byte array.
* @since 1.0.0
*/
public static byte[] toByteArray(final long[] value) {
return toByteArray(value, ByteOrder.BIG_ENDIAN);
}
/**
* Long array to byte array.
* @param value value.
* @param bo byte order.
* @return byte array.
*/
public static byte[] toByteArray(final long[] value, final ByteOrder bo) {
return toByteArray(value, 0, value.length, bo);
}
/**
* Long array to byte array.
* @param value value.
* @param offset offset.
* @param length length.
* @param bo byte order.
* @return byte array.
* @since 1.0.0
*/
public static byte[] toByteArray(final long[] value, final int offset, final int length, final ByteOrder bo) {
Validate.notInBounds(value, offset, length);
byte[] array = new byte[length << 3];
if (bo.equals(ByteOrder.BIG_ENDIAN)) {
for (int i = offset; i < length; i++) {
long x = value[i];
int j = i << 3;
array[j++] = (byte) ((x >> 0) & 0xff);
array[j++] = (byte) ((x >> 8) & 0xff);
array[j++] = (byte) ((x >> 16) & 0xff);
array[j++] = (byte) ((x >> 24) & 0xff);
array[j++] = (byte) ((x >> 32) & 0xff);
array[j++] = (byte) ((x >> 40) & 0xff);
array[j++] = (byte) ((x >> 48) & 0xff);
array[j++] = (byte) ((x >> 56) & 0xff);
}
return array;
} else {
for (int i = offset; i < length; i++) {
long x = value[i];
int j = i << 3;
array[j++] = (byte) ((x >> 56) & 0xff);
array[j++] = (byte) ((x >> 48) & 0xff);
array[j++] = (byte) ((x >> 40) & 0xff);
array[j++] = (byte) ((x >> 32) & 0xff);
array[j++] = (byte) ((x >> 24) & 0xff);
array[j++] = (byte) ((x >> 16) & 0xff);
array[j++] = (byte) ((x >> 8) & 0xff);
array[j++] = (byte) ((x >> 0) & 0xff);
}
return array;
}
}
/**
* ByteBuffer to byte array.
* @param byteBuffer ByteBuffer.
* @return byte array.
* @since 1.0.0
*/
public static byte[] toByteArray(final ByteBuffer byteBuffer) {
Validate.nullPointer(byteBuffer);
if (!byteBuffer.hasRemaining()) {
byteBuffer.flip();
}
byte[] buffer = new byte[byteBuffer.remaining()];
byteBuffer.get(buffer);
return buffer;
}
}
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