khadgarmage
5 years ago
committed by
qiaozhanwei
2 changed files with 3 additions and 702 deletions
@ -1,699 +0,0 @@
|
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/* |
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* Licensed to the Apache Software Foundation (ASF) under one or more |
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* contributor license agreements. See the NOTICE file distributed with |
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* this work for additional information regarding copyright ownership. |
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* The ASF licenses this file to You under the Apache License, Version 2.0 |
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* (the "License"); you may not use this file except in compliance with |
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* the License. You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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package org.apache.dolphinscheduler.common.utils; |
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import org.slf4j.Logger; |
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import org.slf4j.LoggerFactory; |
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import java.math.BigDecimal; |
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import java.math.BigInteger; |
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import java.nio.ByteBuffer; |
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import java.nio.charset.StandardCharsets; |
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/** |
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* Utility class that handles Bytes |
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*/ |
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public class Bytes { |
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private static final Logger logger = LoggerFactory.getLogger(Bytes.class); |
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public static final String UTF8_ENCODING = "UTF-8"; |
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//An empty instance.
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public static final byte [] EMPTY_BYTE_ARRAY = new byte [0]; |
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/** |
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* Size of int in bytes |
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*/ |
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public static final int SIZEOF_INT = Integer.SIZE / Byte.SIZE; |
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/** |
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* Size of long in bytes |
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*/ |
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public static final int SIZEOF_LONG = Long.SIZE / Byte.SIZE; |
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/** |
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* Size of short in bytes |
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*/ |
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public static final int SIZEOF_SHORT = Short.SIZE / Byte.SIZE; |
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/** |
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* Put bytes at the specified byte array position. |
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* @param tgtBytes the byte array |
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* @param tgtOffset position in the array |
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* @param srcBytes array to write out |
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* @param srcOffset source offset |
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* @param srcLength source length |
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* @return incremented offset |
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*/ |
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public static int putBytes(byte[] tgtBytes, int tgtOffset, byte[] srcBytes, |
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int srcOffset, int srcLength) { |
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System.arraycopy(srcBytes, srcOffset, tgtBytes, tgtOffset, srcLength); |
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return tgtOffset + srcLength; |
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} |
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/** |
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* Write a single byte out to the specified byte array position. |
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* @param bytes the byte array |
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* @param offset position in the array |
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* @param b byte to write out |
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* @return incremented offset |
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*/ |
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public static int putByte(byte[] bytes, int offset, byte b) { |
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bytes[offset] = b; |
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return offset + 1; |
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} |
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/** |
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* Returns a new byte array, copied from the passed ByteBuffer. |
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* @param bb A ByteBuffer |
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* @return the byte array |
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*/ |
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public static byte[] toBytes(ByteBuffer bb) { |
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int length = bb.limit(); |
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byte [] result = new byte[length]; |
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System.arraycopy(bb.array(), bb.arrayOffset(), result, 0, length); |
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return result; |
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} |
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/** |
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* @param b Presumed UTF-8 encoded byte array. |
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* @return String made from <code>b</code> |
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*/ |
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public static String toString(final byte [] b) { |
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if (b == null) { |
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return null; |
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} |
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return toString(b, 0, b.length); |
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} |
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/** |
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* Joins two byte arrays together using a separator. |
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* @param b1 The first byte array. |
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* @param sep The separator to use. |
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* @param b2 The second byte array. |
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* @return two byte arrays together using a separator. |
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*/ |
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public static String toString(final byte [] b1, |
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String sep, |
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final byte [] b2) { |
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return toString(b1, 0, b1.length) + sep + toString(b2, 0, b2.length); |
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} |
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/** |
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* This method will convert utf8 encoded bytes into a string. If |
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* an UnsupportedEncodingException occurs, this method will eat it |
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* and return null instead. |
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* |
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* @param b Presumed UTF-8 encoded byte array. |
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* @param off offset into array |
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* @param len length of utf-8 sequence |
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* @return String made from <code>b</code> or null |
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*/ |
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public static String toString(final byte [] b, int off, int len) { |
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if (b == null) { |
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return null; |
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} |
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if (len == 0) { |
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return ""; |
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} |
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return new String(b, off, len, StandardCharsets.UTF_8); |
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} |
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/** |
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* Converts a string to a UTF-8 byte array. |
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* @param s string |
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* @return the byte array |
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*/ |
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public static byte[] toBytes(String s) { |
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return s.getBytes(StandardCharsets.UTF_8); |
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} |
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/** |
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* Convert a boolean to a byte array. True becomes -1 |
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* and false becomes 0. |
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* |
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* @param b value |
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* @return <code>b</code> encoded in a byte array. |
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*/ |
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public static byte [] toBytes(final boolean b) { |
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return new byte[] { b ? (byte) -1 : (byte) 0 }; |
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} |
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/** |
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* Reverses {@link #toBytes(boolean)} |
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* @param b array |
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* @return True or false. |
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*/ |
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public static boolean toBoolean(final byte [] b) { |
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if (b.length != 1) { |
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throw new IllegalArgumentException("Array has wrong size: " + b.length); |
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} |
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return b[0] != (byte) 0; |
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} |
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/** |
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* Convert a long value to a byte array using big-endian. |
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* |
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* @param val value to convert |
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* @return the byte array |
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*/ |
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public static byte[] toBytes(long val) { |
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byte [] b = new byte[8]; |
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for (int i = 7; i > 0; i--) { |
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b[i] = (byte) val; |
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val >>>= 8; |
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} |
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b[0] = (byte) val; |
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return b; |
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} |
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/** |
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* Converts a byte array to a long value. Reverses |
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* {@link #toBytes(long)} |
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* @param bytes array |
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* @return the long value |
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*/ |
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public static long toLong(byte[] bytes) { |
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return toLong(bytes, 0, SIZEOF_LONG); |
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} |
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/** |
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* Converts a byte array to a long value. Assumes there will be |
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* {@link #SIZEOF_LONG} bytes available. |
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* |
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* @param bytes bytes |
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* @param offset offset |
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* @return the long value |
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*/ |
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public static long toLong(byte[] bytes, int offset) { |
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return toLong(bytes, offset, SIZEOF_LONG); |
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} |
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/** |
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* Converts a byte array to a long value. |
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* |
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* @param bytes array of bytes |
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* @param offset offset into array |
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* @param length length of data (must be {@link #SIZEOF_LONG}) |
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* @return the long value |
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* @throws IllegalArgumentException if length is not {@link #SIZEOF_LONG} or |
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* if there's not enough room in the array at the offset indicated. |
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*/ |
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public static long toLong(byte[] bytes, int offset, final int length) { |
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if (length != SIZEOF_LONG || offset + length > bytes.length) { |
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throw explainWrongLengthOrOffset(bytes, offset, length, SIZEOF_LONG); |
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} |
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long l = 0; |
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for(int i = offset; i < offset + length; i++) { |
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l <<= 8; |
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l ^= bytes[i] & 0xFF; |
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} |
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return l; |
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} |
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private static IllegalArgumentException |
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explainWrongLengthOrOffset(final byte[] bytes, |
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final int offset, |
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final int length, |
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final int expectedLength) { |
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String reason; |
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if (length != expectedLength) { |
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reason = "Wrong length: " + length + ", expected " + expectedLength; |
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} else { |
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reason = "offset (" + offset + ") + length (" + length + ") exceed the" |
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+ " capacity of the array: " + bytes.length; |
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} |
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return new IllegalArgumentException(reason); |
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} |
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/** |
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* Put a long value out to the specified byte array position. |
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* @param bytes the byte array |
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* @param offset position in the array |
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* @param val long to write out |
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* @return incremented offset |
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* @throws IllegalArgumentException if the byte array given doesn't have |
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* enough room at the offset specified. |
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*/ |
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public static int putLong(byte[] bytes, int offset, long val) { |
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if (bytes.length - offset < SIZEOF_LONG) { |
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throw new IllegalArgumentException("Not enough room to put a long at" |
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+ " offset " + offset + " in a " + bytes.length + " byte array"); |
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} |
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for(int i = offset + 7; i > offset; i--) { |
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bytes[i] = (byte) val; |
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val >>>= 8; |
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} |
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bytes[offset] = (byte) val; |
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return offset + SIZEOF_LONG; |
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} |
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/** |
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* Presumes float encoded as IEEE 754 floating-point "single format" |
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* @param bytes byte array |
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* @return Float made from passed byte array. |
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*/ |
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public static float toFloat(byte [] bytes) { |
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return toFloat(bytes, 0); |
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} |
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/** |
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* Presumes float encoded as IEEE 754 floating-point "single format" |
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* @param bytes array to convert |
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* @param offset offset into array |
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* @return Float made from passed byte array. |
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*/ |
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public static float toFloat(byte [] bytes, int offset) { |
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return Float.intBitsToFloat(toInt(bytes, offset, SIZEOF_INT)); |
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} |
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/** |
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* @param bytes byte array |
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* @param offset offset to write to |
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* @param f float value |
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* @return New offset in <code>bytes</code> |
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*/ |
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public static int putFloat(byte [] bytes, int offset, float f) { |
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return putInt(bytes, offset, Float.floatToRawIntBits(f)); |
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} |
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/** |
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* @param f float value |
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* @return the float represented as byte [] |
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*/ |
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public static byte [] toBytes(final float f) { |
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// Encode it as int
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return Bytes.toBytes(Float.floatToRawIntBits(f)); |
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} |
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/** |
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* @param bytes byte array |
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* @return Return double made from passed bytes. |
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*/ |
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public static double toDouble(final byte [] bytes) { |
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return toDouble(bytes, 0); |
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} |
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/** |
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* @param bytes byte array |
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* @param offset offset where double is |
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* @return Return double made from passed bytes. |
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*/ |
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public static double toDouble(final byte [] bytes, final int offset) { |
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return Double.longBitsToDouble(toLong(bytes, offset, SIZEOF_LONG)); |
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} |
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/** |
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* @param bytes byte array |
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* @param offset offset to write to |
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* @param d value |
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* @return New offset into array <code>bytes</code> |
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*/ |
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public static int putDouble(byte [] bytes, int offset, double d) { |
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return putLong(bytes, offset, Double.doubleToLongBits(d)); |
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} |
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/** |
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* Serialize a double as the IEEE 754 double format output. The resultant |
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* array will be 8 bytes long. |
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* |
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* @param d value |
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* @return the double represented as byte [] |
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*/ |
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public static byte [] toBytes(final double d) { |
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// Encode it as a long
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return Bytes.toBytes(Double.doubleToRawLongBits(d)); |
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} |
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/** |
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* Convert an int value to a byte array |
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* @param val value |
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* @return the byte array |
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*/ |
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public static byte[] toBytes(int val) { |
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byte [] b = new byte[4]; |
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for(int i = 3; i > 0; i--) { |
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b[i] = (byte) val; |
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val >>>= 8; |
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} |
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b[0] = (byte) val; |
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return b; |
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} |
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/** |
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* Converts a byte array to an int value |
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* @param bytes byte array |
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* @return the int value |
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*/ |
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public static int toInt(byte[] bytes) { |
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return toInt(bytes, 0, SIZEOF_INT); |
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} |
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/** |
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* Converts a byte array to an int value |
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* @param bytes byte array |
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* @param offset offset into array |
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* @return the int value |
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*/ |
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public static int toInt(byte[] bytes, int offset) { |
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return toInt(bytes, offset, SIZEOF_INT); |
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} |
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|
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/** |
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* Converts a byte array to an int value |
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* @param bytes byte array |
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* @param offset offset into array |
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* @param length length of int (has to be {@link #SIZEOF_INT}) |
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* @return the int value |
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* @throws IllegalArgumentException if length is not {@link #SIZEOF_INT} or |
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* if there's not enough room in the array at the offset indicated. |
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*/ |
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public static int toInt(byte[] bytes, int offset, final int length) { |
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if (length != SIZEOF_INT || offset + length > bytes.length) { |
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throw explainWrongLengthOrOffset(bytes, offset, length, SIZEOF_INT); |
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} |
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int n = 0; |
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for(int i = offset; i < (offset + length); i++) { |
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n <<= 8; |
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n ^= bytes[i] & 0xFF; |
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} |
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return n; |
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} |
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|
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/** |
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* Put an int value out to the specified byte array position. |
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* @param bytes the byte array |
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* @param offset position in the array |
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* @param val int to write out |
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* @return incremented offset |
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* @throws IllegalArgumentException if the byte array given doesn't have |
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* enough room at the offset specified. |
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*/ |
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public static int putInt(byte[] bytes, int offset, int val) { |
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if (bytes.length - offset < SIZEOF_INT) { |
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throw new IllegalArgumentException("Not enough room to put an int at" |
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+ " offset " + offset + " in a " + bytes.length + " byte array"); |
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} |
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for(int i= offset + 3; i > offset; i--) { |
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bytes[i] = (byte) val; |
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val >>>= 8; |
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} |
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bytes[offset] = (byte) val; |
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return offset + SIZEOF_INT; |
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} |
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/** |
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* Convert a short value to a byte array of {@link #SIZEOF_SHORT} bytes long. |
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* @param val value |
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* @return the byte array |
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*/ |
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public static byte[] toBytes(short val) { |
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byte[] b = new byte[SIZEOF_SHORT]; |
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b[1] = (byte) val; |
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val >>= 8; |
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b[0] = (byte) val; |
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return b; |
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} |
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/** |
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* Converts a byte array to a short value |
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* @param bytes byte array |
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* @return the short value |
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*/ |
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public static short toShort(byte[] bytes) { |
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return toShort(bytes, 0, SIZEOF_SHORT); |
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} |
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|
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/** |
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* Converts a byte array to a short value |
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* @param bytes byte array |
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* @param offset offset into array |
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* @return the short value |
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*/ |
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public static short toShort(byte[] bytes, int offset) { |
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return toShort(bytes, offset, SIZEOF_SHORT); |
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} |
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|
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/** |
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* Converts a byte array to a short value |
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* @param bytes byte array |
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* @param offset offset into array |
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* @param length length, has to be {@link #SIZEOF_SHORT} |
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* @return the short value |
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* @throws IllegalArgumentException if length is not {@link #SIZEOF_SHORT} |
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* or if there's not enough room in the array at the offset indicated. |
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*/ |
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public static short toShort(byte[] bytes, int offset, final int length) { |
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if (length != SIZEOF_SHORT || offset + length > bytes.length) { |
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throw explainWrongLengthOrOffset(bytes, offset, length, SIZEOF_SHORT); |
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} |
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short n = 0; |
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n ^= bytes[offset] & 0xFF; |
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n <<= 8; |
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n ^= bytes[offset+1] & 0xFF; |
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return n; |
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} |
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|
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/** |
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* This method will get a sequence of bytes from pos to limit, |
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* but will restore pos after. |
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* @param buf buffer |
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* @return byte array |
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*/ |
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public static byte[] getBytes(ByteBuffer buf) { |
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int savedPos = buf.position(); |
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byte [] newBytes = new byte[buf.remaining()]; |
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buf.get(newBytes); |
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buf.position(savedPos); |
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return newBytes; |
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} |
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|
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/** |
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* Put a short value out to the specified byte array position. |
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* @param bytes the byte array |
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* @param offset position in the array |
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* @param val short to write out |
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* @return incremented offset |
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* @throws IllegalArgumentException if the byte array given doesn't have |
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* enough room at the offset specified. |
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*/ |
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public static int putShort(byte[] bytes, int offset, short val) { |
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if (bytes.length - offset < SIZEOF_SHORT) { |
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throw new IllegalArgumentException("Not enough room to put a short at" |
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+ " offset " + offset + " in a " + bytes.length + " byte array"); |
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} |
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bytes[offset+1] = (byte) val; |
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val >>= 8; |
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bytes[offset] = (byte) val; |
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return offset + SIZEOF_SHORT; |
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} |
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|
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/** |
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* Convert a BigDecimal value to a byte array |
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* |
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* @param val value |
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* @return the byte array |
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*/ |
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public static byte[] toBytes(BigDecimal val) { |
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byte[] valueBytes = val.unscaledValue().toByteArray(); |
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byte[] result = new byte[valueBytes.length + SIZEOF_INT]; |
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int offset = putInt(result, 0, val.scale()); |
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putBytes(result, offset, valueBytes, 0, valueBytes.length); |
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return result; |
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} |
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|
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|
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/** |
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* Converts a byte array to a BigDecimal |
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* |
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* @param bytes bytes array |
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* @return the char value |
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*/ |
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public static BigDecimal toBigDecimal(byte[] bytes) { |
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return toBigDecimal(bytes, 0, bytes.length); |
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} |
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|
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/** |
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* Converts a byte array to a BigDecimal value |
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* |
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* @param bytes bytes array |
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* @param offset offset |
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* @param length length |
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* @return the char value |
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*/ |
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public static BigDecimal toBigDecimal(byte[] bytes, int offset, final int length) { |
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if (bytes == null || length < SIZEOF_INT + 1 || |
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(offset + length > bytes.length)) { |
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return null; |
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} |
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|
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int scale = toInt(bytes, offset); |
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byte[] tcBytes = new byte[length - SIZEOF_INT]; |
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System.arraycopy(bytes, offset + SIZEOF_INT, tcBytes, 0, length - SIZEOF_INT); |
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return new BigDecimal(new BigInteger(tcBytes), scale); |
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} |
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|
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/** |
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* Put a BigDecimal value out to the specified byte array position. |
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* |
||||
* @param bytes the byte array |
||||
* @param offset position in the array |
||||
* @param val BigDecimal to write out |
||||
* @return incremented offset |
||||
*/ |
||||
public static int putBigDecimal(byte[] bytes, int offset, BigDecimal val) { |
||||
if (bytes == null) { |
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return offset; |
||||
} |
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|
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byte[] valueBytes = val.unscaledValue().toByteArray(); |
||||
byte[] result = new byte[valueBytes.length + SIZEOF_INT]; |
||||
offset = putInt(result, offset, val.scale()); |
||||
return putBytes(result, offset, valueBytes, 0, valueBytes.length); |
||||
} |
||||
|
||||
/** |
||||
* @param a lower half |
||||
* @param b upper half |
||||
* @return New array that has a in lower half and b in upper half. |
||||
*/ |
||||
public static byte [] add(final byte [] a, final byte [] b) { |
||||
return add(a, b, EMPTY_BYTE_ARRAY); |
||||
} |
||||
|
||||
/** |
||||
* @param a first third |
||||
* @param b second third |
||||
* @param c third third |
||||
* @return New array made from a, b and c |
||||
*/ |
||||
public static byte [] add(final byte [] a, final byte [] b, final byte [] c) { |
||||
byte [] result = new byte[a.length + b.length + c.length]; |
||||
System.arraycopy(a, 0, result, 0, a.length); |
||||
System.arraycopy(b, 0, result, a.length, b.length); |
||||
System.arraycopy(c, 0, result, a.length + b.length, c.length); |
||||
return result; |
||||
} |
||||
|
||||
/** |
||||
* @param a array |
||||
* @param length amount of bytes to grab |
||||
* @return First <code>length</code> bytes from <code>a</code> |
||||
*/ |
||||
public static byte [] head(final byte [] a, final int length) { |
||||
if (a.length < length) { |
||||
return null; |
||||
} |
||||
byte [] result = new byte[length]; |
||||
System.arraycopy(a, 0, result, 0, length); |
||||
return result; |
||||
} |
||||
|
||||
/** |
||||
* @param a array |
||||
* @param length amount of bytes to snarf |
||||
* @return Last <code>length</code> bytes from <code>a</code> |
||||
*/ |
||||
public static byte [] tail(final byte [] a, final int length) { |
||||
if (a.length < length) { |
||||
return null; |
||||
} |
||||
byte [] result = new byte[length]; |
||||
System.arraycopy(a, a.length - length, result, 0, length); |
||||
return result; |
||||
} |
||||
|
||||
/** |
||||
* @param a array |
||||
* @param length new array size |
||||
* @return Value in <code>a</code> plus <code>length</code> prepended 0 bytes |
||||
*/ |
||||
public static byte [] padHead(final byte [] a, final int length) { |
||||
byte[] padding = getPadding(length); |
||||
return add(padding,a); |
||||
} |
||||
|
||||
private static byte[] getPadding(int length) { |
||||
byte[] padding = new byte[length]; |
||||
for (int i = 0; i < length; i++) { |
||||
padding[i] = 0; |
||||
} |
||||
return padding; |
||||
} |
||||
|
||||
/** |
||||
* @param a array |
||||
* @param length new array size |
||||
* @return Value in <code>a</code> plus <code>length</code> appended 0 bytes |
||||
*/ |
||||
public static byte [] padTail(final byte [] a, final int length) { |
||||
byte[] padding = getPadding(length); |
||||
return add(a,padding); |
||||
} |
||||
|
||||
|
||||
|
||||
/** |
||||
* @param bytes array to hash |
||||
* @param offset offset to start from |
||||
* @param length length to hash |
||||
* @return hash code |
||||
* */ |
||||
public static int hashCode(byte[] bytes, int offset, int length) { |
||||
int hash = 1; |
||||
for (int i = offset; i < offset + length; i++) { |
||||
hash = (31 * hash) + (int) bytes[i]; |
||||
} |
||||
return hash; |
||||
} |
||||
|
||||
/** |
||||
* @param t operands |
||||
* @return Array of byte arrays made from passed array of Text |
||||
*/ |
||||
public static byte [][] toByteArrays(final String [] t) { |
||||
byte [][] result = new byte[t.length][]; |
||||
for (int i = 0; i < t.length; i++) { |
||||
result[i] = Bytes.toBytes(t[i]); |
||||
} |
||||
return result; |
||||
} |
||||
|
||||
/** |
||||
* @param column operand |
||||
* @return A byte array of a byte array where first and only entry is |
||||
* <code>column</code> |
||||
*/ |
||||
public static byte [][] toByteArrays(final String column) { |
||||
return toByteArrays(toBytes(column)); |
||||
} |
||||
|
||||
/** |
||||
* @param column operand |
||||
* @return A byte array of a byte array where first and only entry is |
||||
* <code>column</code> |
||||
*/ |
||||
public static byte [][] toByteArrays(final byte [] column) { |
||||
byte [][] result = new byte[1][]; |
||||
result[0] = column; |
||||
return result; |
||||
} |
||||
|
||||
|
||||
} |
||||
Loading…
Reference in new issue