Package org.apache.derby.impl.io
Class DirRandomAccessFile
java.lang.Object
java.io.RandomAccessFile
org.apache.derby.impl.io.DirRandomAccessFile
- All Implemented Interfaces:
Closeable
,DataInput
,DataOutput
,AutoCloseable
,StorageRandomAccessFile
This class provides a disk based implementation of the StIRandomAccess File interface. It is used by the
database engine to access persistent data and transaction logs under the directory (default) subsubprotocol.
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Field Summary
Fields -
Constructor Summary
ConstructorsConstructorDescriptionDirRandomAccessFile
(File name, String mode) Construct a StorageRandomAccessFileImpl. -
Method Summary
Methods inherited from class java.io.RandomAccessFile
close, getChannel, getFD, getFilePointer, length, read, read, read, readBoolean, readByte, readChar, readDouble, readFloat, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedShort, readUTF, seek, setLength, skipBytes, write, write, write, writeBoolean, writeByte, writeBytes, writeChar, writeChars, writeDouble, writeFloat, writeInt, writeLong, writeShort, writeUTF
Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods inherited from interface java.io.DataInput
readBoolean, readByte, readChar, readDouble, readFloat, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedShort, readUTF, skipBytes
Methods inherited from interface java.io.DataOutput
write, write, write, writeBoolean, writeByte, writeBytes, writeChar, writeChars, writeDouble, writeFloat, writeInt, writeLong, writeShort, writeUTF
Methods inherited from interface org.apache.derby.io.StorageRandomAccessFile
close, getFilePointer, length, read, seek, setLength
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Field Details
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_name
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_mode
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Constructor Details
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DirRandomAccessFile
DirRandomAccessFile(File name, String mode) throws FileNotFoundException Construct a StorageRandomAccessFileImpl.- Parameters:
name
- The file name.mode
- The file open mode: "r", "rw", "rws", or "rwd". The "rws" and "rwd" modes specify that the file is to be synchronized, consistent with the java.io.RandomAccessFile class. However the StorageRandomAccessFile.sync() method will be called even if the file was opened in "rws" or "rwd" mode. If the "rws" or "rwd" modes are supported then the implementation of StorageRandomAccessFile.sync need not do anything.- Throws:
IllegalArgumentException
- if the mode argument is not equal to one of "r", "rw".FileNotFoundException
- if the file exists but is a directory rather than a regular file, or cannot be opened or created for any other reason .
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Method Details
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clone
Clone this file abstaction- Specified by:
clone
in interfaceStorageRandomAccessFile
- Overrides:
clone
in classObject
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sync
Force any changes out to the persistent store.- Specified by:
sync
in interfaceStorageRandomAccessFile
- Throws:
IOException
- If an IO error occurs.
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