org.apache.iotdb.db.utils

类 IOUtils

java.lang.Object

org.apache.iotdb.db.utils.IOUtils

public class IOUtils
extends Object

方法概要

限定符和类型	方法和说明
static ByteBuffer	clone(ByteBuffer original)
static PathPrivilege	readPathPrivilege(DataInputStream inputStream, String encoding, ThreadLocal<byte[]> strBufferLocal) Read a PathPrivilege from the given stream.
static String	readString(DataInputStream inputStream, String encoding, ThreadLocal<byte[]> strBufferLocal) Read a string from the given stream.
static void	replaceFile(File newFile, File oldFile) Replace newFile with oldFile.
static void	writeInt(OutputStream outputStream, int i, ThreadLocal<ByteBuffer> encodingBufferLocal) Write an integer into the given stream.
static void	writePathPrivilege(OutputStream outputStream, PathPrivilege pathPrivilege, String encoding, ThreadLocal<ByteBuffer> encodingBufferLocal) Write a PathPrivilege to the given stream.
static void	writeString(OutputStream outputStream, String str, String encoding, ThreadLocal<ByteBuffer> encodingBufferLocal) Write a string into the given stream.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

方法详细资料

writeString

public static void writeString(OutputStream outputStream,
                               String str,
                               String encoding,
                               ThreadLocal<ByteBuffer> encodingBufferLocal)
                        throws IOException

Write a string into the given stream.

参数:

outputStream - the destination to insert.

str - the string to be written.

encoding - string encoding like 'utf-8'.

encodingBufferLocal - a ThreadLocal buffer may be passed to avoid frequently memory allocations. A null may also be passed to use a local buffer.

抛出:

IOException - when an exception raised during operating the stream.

writeInt

public static void writeInt(OutputStream outputStream,
                            int i,
                            ThreadLocal<ByteBuffer> encodingBufferLocal)
                     throws IOException

Write an integer into the given stream.

参数:

outputStream - the destination to insert.

i - the integer to be written.

encodingBufferLocal - a ThreadLocal buffer may be passed to avoid frequently memory allocations. A null may also be passed to use a local buffer.

抛出:

IOException - when an exception raised during operating the stream.

readString

public static String readString(DataInputStream inputStream,
                                String encoding,
                                ThreadLocal<byte[]> strBufferLocal)
                         throws IOException

Read a string from the given stream.

参数:

inputStream - the source to read.

encoding - string encoding like 'utf-8'.

strBufferLocal - a ThreadLocal buffer may be passed to avoid frequently memory allocations. A null may also be passed to use a local buffer.

返回:

a string read from the stream.

抛出:

IOException - when an exception raised during operating the stream.

readPathPrivilege

public static PathPrivilege readPathPrivilege(DataInputStream inputStream,
                                              String encoding,
                                              ThreadLocal<byte[]> strBufferLocal)
                                       throws IOException

Read a PathPrivilege from the given stream.

参数:

inputStream - the source to read.

encoding - string encoding like 'utf-8'.

strBufferLocal - a ThreadLocal buffer may be passed to avoid frequently memory allocations. A null may also be passed to use a local buffer.

返回:

a PathPrivilege read from the stream.

抛出:

IOException - when an exception raised during operating the stream.

writePathPrivilege

public static void writePathPrivilege(OutputStream outputStream,
                                      PathPrivilege pathPrivilege,
                                      String encoding,
                                      ThreadLocal<ByteBuffer> encodingBufferLocal)
                               throws IOException

Write a PathPrivilege to the given stream.

参数:

outputStream - the destination to insert.

pathPrivilege - the PathPrivilege to be written.

encoding - string encoding like 'utf-8'.

encodingBufferLocal - a ThreadLocal buffer may be passed to avoid frequently memory allocations. A null may also be passed to use a local buffer.

抛出:

IOException - when an exception raised during operating the stream.

replaceFile

public static void replaceFile(File newFile,
                               File oldFile)
                        throws IOException

Replace newFile with oldFile. If the file system does not support atomic file replacement then delete the old file first.

参数:

newFile - the new file.

oldFile - the file to be replaced.

抛出:

IOException

clone

public static ByteBuffer clone(ByteBuffer original)