com.jstatcom.io
Class TSASCIIHandler

java.lang.Object
  com.jstatcom.io.TSASCIIHandler

All Implemented Interfaces:

DataHandler

public final class TSASCIIHandler
extends java.lang.Object
implements DataHandler

Import handler for ASCII data files that either contain only the data points or are in the DAT format. It is designed as a singleton.

An example DAT file looks like:
<1960 Q1>
invest income cons
180 451 415
179 465 421
185 485 434

In line 1 the first number is number of variables, then the date of the first observation and the periodicity.
Line 2 contains the variable names. The remaining lines are the ordered observations. Any Description is added as a comment and must be included in / * ... * /.

Author:

Markus Kraetzig

Method Summary

void	exportData(java.io.File file, JSCData data, java.lang.String description) Exports data to a file in ASCII format.
void	exportTS(java.io.File file, TS[] ts, java.lang.String description) Exports time series to a file in the format that the respective implementation of this interface handles.
JSCData	getData(ImportTypes type) Gets the imported data according to an instance of TSImportTypes.
static TSASCIIHandler	getInstance() Gets the singleton instance of this handler.
boolean	importData(java.io.File dataFile) Initiates parsing of data file.
void	setTestMode(boolean noDialog) Sets this handler in test mode.

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static TSASCIIHandler getInstance()

Gets the singleton instance of this handler.

Returns:

instance

importData

public boolean importData(java.io.File dataFile)

Initiates parsing of data file.

Specified by:

importData in interface DataHandler

Parameters:

dataFile - the file to read in

Returns:

true of import was ok, false if canceled or erroneous

Throws:

java.lang.IllegalArgumentException - if (dataFile == null || !dataFile.isFile())

getData

public JSCData getData(ImportTypes type)

Gets the imported data according to an instance of TSImportTypes.

Specified by:

getData in interface DataHandler

Parameters:

type - the elementtype of a time series dataset

Returns:

the data stored as JSCData

Throws:

java.lang.IllegalArgumentException - if (type == null)

java.lang.IllegalStateException - if nothing was imported before

exportTS

public void exportTS(java.io.File file,
                     TS[] ts,
                     java.lang.String description)

Description copied from interface: DataHandler

Exports time series to a file in the format that the respective implementation of this interface handles.

Implementation Note:
Not every handler implementation uses all information contained in a time series. For example, some handlers might not store the variable names, the date, and the description, because this may not be supported by the respective format.

Implementations of this method should throw unchecked exceptions in case of errors, which should be dealt with by the calling objects.

Specified by:

exportTS in interface DataHandler

Parameters:

file - the file to store the time series to

ts - array of time series to export

description - an optional dataset description that handler implementations might use

exportData

public void exportData(java.io.File file,
                       JSCData data,
                       java.lang.String description)

Exports data to a file in ASCII format. This method uses the display method on the data parameter.

Usage Note:
To store NARRAY data with its full precision, make sure to call data.setFormatString("%-s ") before. Otherwise the default formatter is used, which only stores 4 digits. Nothing happens if data is empty.

Specified by:

exportData in interface DataHandler

Parameters:

file - the file to store the data to

data - the data object to store, all JSCData types are supported

description - an optional description that handler implementations might use, can be null

Throws:

java.lang.IllegalArgumentException - if file or data is null

java.lang.RuntimeException - if file writing fails

setTestMode

public void setTestMode(boolean noDialog)

Sets this handler in test mode. No user dialog is shown, default values are used instead. This is helpful for running automated unit tests.

Parameters:

noDialog -