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java.lang.Objectorg.apache.derby.impl.load.ImportLobFile
class ImportLobFile
Helper class to read large object data at random locations from a file that contains large object data.
Field Summary | |
---|---|
private java.lang.String |
dataCodeset
|
private ImportFileInputStream |
lobInputStream
|
private LimitInputStream |
lobLimitIn
|
private java.io.Reader |
lobReader
|
Constructor Summary | |
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ImportLobFile(java.io.File lobFile,
java.lang.String dataCodeset)
Create a ImportLobFile object. |
Method Summary | |
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void |
close()
Close all the resources realated to the lob file. |
java.io.InputStream |
getBinaryStream(long offset,
long length)
Returns a stream that points to the lob data from file at the given offset . |
java.io.Reader |
getCharacterStream(long offset,
long length)
Returns a stream that points to the clob data from file at the given offset . |
long |
getClobDataLength(long offset,
long length)
Returns the clob data length in characters at the give location. |
java.lang.String |
getString(int offset,
int length)
Returns the clob data at the given location as String . |
private void |
openLobFile(java.io.File lobFile)
Open the lob file and setup the stream required to read the data. |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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private ImportFileInputStream lobInputStream
private LimitInputStream lobLimitIn
private java.io.Reader lobReader
private java.lang.String dataCodeset
Constructor Detail |
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ImportLobFile(java.io.File lobFile, java.lang.String dataCodeset) throws java.lang.Exception
lobFile
- the file which has the LOB Data.dataCodeset
- the code set to use char data in the file.
java.lang.Exception
Method Detail |
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private void openLobFile(java.io.File lobFile) throws java.lang.Exception
lobFile
- the file that contains lob data.
java.lang.Exception
- if an error occurs.public java.io.InputStream getBinaryStream(long offset, long length) throws java.io.IOException
offset
.
offset
- byte offset of the column data in the file.length
- length of the the data.
java.io.IOException
- if any I/O error occurs.public java.lang.String getString(int offset, int length) throws java.io.IOException
String
.
offset
- byte offset of the column data in the file.length
- length of the the data.
java.io.IOException
- on any I/O error.public java.io.Reader getCharacterStream(long offset, long length) throws java.io.IOException
offset
.
offset
- byte offset of the column data in the file.length
- length of the the data in bytes.
java.io.IOException
- on any I/O error.public long getClobDataLength(long offset, long length) throws java.io.IOException
offset
- byte offset of the column data in the file.length
- length of the the data in bytes.
java.io.IOException
- on any I/O error.public void close() throws java.io.IOException
java.io.IOException
|
Built on Thu 2010-12-23 20:49:13+0000, from revision ??? | ||||||||
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