scriptella.driver.csv
Class CsvQuery

java.lang.Object
  scriptella.driver.csv.CsvQuery

All Implemented Interfaces:

scriptella.spi.ParametersCallback

public class CsvQuery
extends java.lang.Object
implements scriptella.spi.ParametersCallback

Query for CSV file.

Version:

1.0

Author:

Fyodor Kupolov

Field Summary

protected boolean	headers
protected static java.util.logging.Logger	LOG
protected java.lang.String	nullString
protected boolean	trim

Constructor Summary

CsvQuery(CSVReader queryReader, scriptella.expression.PropertiesSubstitutor substitutor, java.lang.String nullString, boolean headers, boolean trim)
Creates a query for CSVReader.

Method Summary

void	execute(CSVReader reader, scriptella.spi.QueryCallback queryCallback, scriptella.spi.AbstractConnection.StatementCounter counter) Executes a query over a specified text content.
protected scriptella.util.ColumnsMap	getColumnsMap()
protected java.lang.Object	getCurrentRowValueAt(int columnIndex, java.lang.String columnName) Returns the value of a specified column.
java.lang.Object	getParameter(java.lang.String name)
protected scriptella.util.ColumnsMap	parseHeader(CSVReader reader)
protected void	processRow(scriptella.spi.QueryCallback queryCallback, java.lang.String[] r) Processes the current row.
protected boolean	rowMatches(java.lang.String[] r) Checks if current CSV row matches any of the specified patterns.

Methods inherited from class java.lang.Object

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

Field Detail

LOG

protected static final java.util.logging.Logger LOG

headers

protected final boolean headers

trim

protected final boolean trim

nullString

protected final java.lang.String nullString

Constructor Detail

CsvQuery

public CsvQuery(CSVReader queryReader,
                scriptella.expression.PropertiesSubstitutor substitutor,
                java.lang.String nullString,
                boolean headers,
                boolean trim)

Creates a query for CSVReader.

Parameters:

queryReader - query CSVReader.

substitutor - properties substitutor to use. The parameters for the substitutor must be set by a caller.

headers - true if first line of input CSV file contains headers.

trim - true if if extra whitespaces should be trimmed.

nullString - string to treat as NULL.

Method Detail

execute

public void execute(CSVReader reader,
                    scriptella.spi.QueryCallback queryCallback,
                    scriptella.spi.AbstractConnection.StatementCounter counter)
             throws java.io.IOException

Executes a query over a specified text content.

Parameters:

reader - CSV content reader.

queryCallback - callback to use for result set iteration.

counter - statements counter.

Throws:

java.io.IOException - if IO error occurs.

parseHeader

protected scriptella.util.ColumnsMap parseHeader(CSVReader reader)
                                          throws java.io.IOException

Throws:

java.io.IOException

rowMatches

protected boolean rowMatches(java.lang.String[] r)

Checks if current CSV row matches any of the specified patterns.

Parameters:

r - row to check

Returns:

true if row matches one of queries.

processRow

protected void processRow(scriptella.spi.QueryCallback queryCallback,
                          java.lang.String[] r)

Processes the current row.

This template method may be used for customizations by sublasses.

Parameters:

queryCallback - query callback to use.

r - row to pass as current parameters callback.

getParameter

public java.lang.Object getParameter(java.lang.String name)

Specified by:

getParameter in interface scriptella.spi.ParametersCallback

getCurrentRowValueAt

protected java.lang.Object getCurrentRowValueAt(int columnIndex,
                                                java.lang.String columnName)

Returns the value of a specified column.

This method may be overriden to perform conversion etc
2 parameters are passed for performance reasons, so that subclasses may decide wich one to use.

Parameters:

columnIndex - column index

columnName - column name.

Returns:

value of the specified column of the current row.

getColumnsMap

protected scriptella.util.ColumnsMap getColumnsMap()