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SUMMARY: NESTED | FIELD | CONSTR | METHOD DETAIL: FIELD | CONSTR | METHOD sun.javadb.vti.core
java.lang.Object
sun.javadb.vti.core.TemplateTableFunction
sun.javadb.vti.core.StringColumnTableFunction
sun.javadb.vti.core.FlatFileTableFunction
All Implemented Interfaces:
ResultSet , Wrapper
public abstract class
FlatFileTableFunction <dt>extends
StringColumnTableFunction </dl>
This Table Function makes a table out of the records in a flat file. This is an abstract class. To extend this class, you must supply the following method, along with a constructor and a public static method which returns an instance of this class. The following method is responsible for parsing the next record and advancing the file:
parseRow() - Parses the next record of the file into an array of Strings, one for each column.
Method Summary
void close ()
protected int getLineNumber ()
protected String getRawColumn (int columnNumber)
protected String getTextFileName ()
boolean next ()
protected abstract String [] parseRow () readLine() , and return the next row.
protected String readLine ()
Methods inherited from class sun.javadb.vti.core. StringColumnTableFunction
findColumn , getAsciiStream , getBigDecimal , getBinaryStream , getBlob , getBoolean , getByte , getBytes , getClob , getColumnCount , getColumnNames , getDate , getDouble , getFloat , getInt , getLong , getShort , getString , getTime , getTimestamp , wasNull , wrap , wrap
Methods inherited from class sun.javadb.vti.core. TemplateTableFunction
absolute , afterLast , beforeFirst , cancelRowUpdates , clearWarnings , deleteRow , first , getArray , getArray , getAsciiStream , getBigDecimal , getBigDecimal , getBigDecimal , getBinaryStream , getBlob , getBoolean , getByte , getBytes , getCharacterStream , getCharacterStream , getClob , getConcurrency , getCursorName , getDate , getDate , getDate , getDouble , getFetchDirection , getFetchSize , getFloat , getHoldability , getInt , getLong , getMetaData , getNCharacterStream , getNCharacterStream , getNClob , getNClob , getNString , getNString , getObject , getObject , getObject , getObject , getRef , getRef , getRow , getRowId , getRowId , getShort , getSQLXML , getSQLXML , getStatement , getString , getTime , getTime , getTime , getTimestamp , getTimestamp , getTimestamp , getType , getUnicodeStream , getUnicodeStream , getURL , getURL , getWarnings , insertRow , isAfterLast , isBeforeFirst , isClosed , isFirst , isLast , isWrapperFor , last , moveToCurrentRow , moveToInsertRow , previous , refreshRow , relative , rowDeleted , rowInserted , rowUpdated , setFetchDirection , setFetchSize , unwrap , updateArray , updateArray , updateAsciiStream , updateAsciiStream , updateAsciiStream , updateAsciiStream , updateAsciiStream , updateAsciiStream , updateBigDecimal , updateBigDecimal , updateBinaryStream , updateBinaryStream , updateBinaryStream , updateBinaryStream , updateBinaryStream , updateBinaryStream , updateBlob , updateBlob , updateBlob , updateBlob , updateBlob , updateBlob , updateBoolean , updateBoolean , updateByte , updateByte , updateBytes , updateBytes , updateCharacterStream , updateCharacterStream , updateCharacterStream , updateCharacterStream , updateCharacterStream , updateCharacterStream , updateClob , updateClob , updateClob , updateClob , updateClob , updateClob , updateDate , updateDate , updateDouble , updateDouble , updateFloat , updateFloat , updateInt , updateInt , updateLong , updateLong , updateNCharacterStream , updateNCharacterStream , updateNCharacterStream , updateNCharacterStream , updateNClob , updateNClob , updateNClob , updateNClob , updateNClob , updateNClob , updateNString , updateNString , updateNull , updateNull , updateObject , updateObject , updateObject , updateObject , updateRef , updateRef , updateRow , updateRowId , updateRowId , updateShort , updateShort , updateSQLXML , updateSQLXML , updateString , updateString , updateTime , updateTime , updateTimestamp , updateTimestamp
Methods inherited from class java.lang. Object
clone , equals , finalize , getClass , hashCode , notify , notifyAll , toString , wait , wait , wait
_textFileName
private
String
_textFileName
_file
private
File
_file
_fileReader
private
FileReader
_fileReader
_lineReader
private
LineNumberReader
_lineReader
_closed
private boolean
_closed
_row
private
String []
_row
_lineNumber
private int
_lineNumber
FlatFileTableFunction
public
FlatFileTableFunction (
String [] columnNames,
String textFileName)
Build a FlatFileTableFunction with the given column names. The function will read from the given file.
parseRow
protected abstract
String []
parseRow ()
throws
SQLException
Parse the next chunk of text, using readLine() , and return the next row. Returns null if the file is exhausted.
Throws:
SQLException
getRawColumn
protected
String
getRawColumn (int columnNumber)
throws
SQLException
Get the string value of the column in the current row identified by the 1-based columnNumber. This method is called by the getXXX () methods in the StringColumnTableFunction superclass.
Specified by:
getRawColumn in class StringColumnTableFunction
Throws:
SQLException
next
public boolean
next ()
throws
SQLException
This method advances to the next record in the file. This method calls parseRow() in order to turn the record into a row. Subsequent calls to the getXXX () methods will return individual columns in that row.
Throws:
SQLException
close
public void
close ()
throws
SQLException
Throws:
SQLException
getLineNumber
protected int
getLineNumber ()
Get the current line number.
getTextFileName
protected
String
getTextFileName ()
Get the name of the file being read.
readLine
protected
String
readLine ()
throws
SQLException
Read the next line from the file and return it. Return null if the file is exhausted.
Throws:
SQLException
Java
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