org.das2.qds

Class OperationsProcessor

java.lang.Object

org.das2.qds.OperationsProcessor

public class OperationsProcessor
extends java.lang.Object

Implement process chain like "|cleanData()|accum()", performing each command of the sequence.

Constructor Summary

Constructors

Constructor and Description
OperationsProcessor()

Method Summary

Modifier and Type	Method and Description
static java.lang.Object	getArgumentIndex(java.lang.String arg, int deft) container for the logic for slicing at an index vs slicing at a datum.
static QDataSet	process(QDataSet ds, java.lang.String c, ProgressMonitor mon) process implements the poorly-named filters string / process string of Autoplot, allowing clients to "pipe" data through a chain of operations.
static QDataSet	sprocess(java.lang.String c, QDataSet fillDs, ProgressMonitor mon) Deprecated.

Methods inherited from class java.lang.Object

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

Constructor Detail

OperationsProcessor

public OperationsProcessor()

Method Detail

getArgumentIndex

public static java.lang.Object getArgumentIndex(java.lang.String arg,
                                                int deft)

container for the logic for slicing at an index vs slicing at a datum. If the string is an integer, then we return the index. If the index is a string, then we need to find the corresponding index to the rank 0 dataset elsewhere. If the string argument is not parseable, then deft is returned.

Parameters:

arg - String that encodes a datum position or index.

deft - default value.

Returns:

an integer index or a dataset indicating the index.

sprocess

public static QDataSet sprocess(java.lang.String c,
                                QDataSet fillDs,
                                ProgressMonitor mon)
                         throws java.lang.Exception

Deprecated.

Parameters:

c - process string like "slice0(9)|histogram()"

fillDs - The dataset loaded from the data source controller, with initial filters (like fill) applied.

mon - monitor for the processing.

Returns:

Throws:

java.lang.Exception

See Also:

process(org.das2.qds.QDataSet, java.lang.String, org.das2.util.monitor.ProgressMonitor)

process

public static QDataSet process(QDataSet ds,
                               java.lang.String c,
                               ProgressMonitor mon)
                        throws java.lang.Exception

process implements the poorly-named filters string / process string of Autoplot, allowing clients to "pipe" data through a chain of operations. For example, the filters string "|slice0(9)|histogram()" will slice on the ninth index and then take a histogram of that result. See http://www.papco.org/wiki/index.php/DataReductionSpecs (TODO: wiki page was lost, which could probably be recovered.) There's a big problem here: if the command is not recognized, then it is ignored. We should probably change this, but the change should be at a major version change in case it breaks things.

Parameters:

ds - The dataset loaded from the data source controller, with initial filters (like fill) applied.

c - process string like "slice0(9)|histogram()"

mon - monitor for the processing.

Returns:

the dataset after the process string is applied.

Throws:

java.text.ParseException - when the string cannot be parsed

java.lang.Exception - when a function cannot be processed (e.g. index out of bounds)

See Also:

http://autoplot.org/developer.dataset.filters, http://autoplot.org/developer.panel_rank_reduction, FilterEditorPanel, https://sourceforge.net/p/autoplot/bugs/2378/