Package uk.ac.starlink.ttools.task

Interface Summary

Interface	Description
Aggregator	Defines an aggregation operation.
Aggregator.Accumulator	Can accumulate multiple data items of a consistent type and yield an aggregate value corresponding to the set.
Aggregator.Aggregation	Object that can manage aggregation for a given type of input data.
DynamicTask	Extends the Task interface by methods which allow task parameters to be queried based on a (at least partially) populated Environment.
ExtraParameter	Interface which defines additional information available from a Parameter.
PixSample.CoordReader	Interface to turn input coordinate values into coordinate values suitable for pixel sampling.
PixSampler.StatMode	Defines how statistics are to be acquired from a pixel or set of pixels.
SingleTableMapping	Interface that defines mapping one table to another.
TableConsumerParameter	Defines an object (probably a parameter) which can return a TableConsumer.
TableEnvironment	Environment subinterface which provides additional functionality required for table-aware tasks.
TableLocator	Interface which describes turning a string into a StarTable object.
TableMapper	Interface for an operation which takes zero or more tables as input and produces one table as output.
TableMapping	Defines an operation which maps zero or more tables on input to a table on output.
TableNamer	Defines how Setting string values are generated from input values which refer to tables.
TableProducer	Provides a table.
TablesInput	Interface for an object which can acquire multiple input tables.
TapResultProducer	Object which can get the output table from a TapQuery.
WordParser<W>	Defines a parser which can turn a string into some other value.

Class Summary

Class	Description
AbstractInputTableParameter<T>	Parameter used to select a table for input.
AddEnvironment	Environment implementation which wraps a base environment instance and adds some extra entries as specified by a given map.
Aggregators	Provides instances of the Aggregator interface.
ArrayJoin	Task to add the contents of an external table for each row of an input table as array-valued columns.
Calc	Task to do static calculations.
CatMapper	TableMapper which concatenates tables top to bottom.
CdsUploadSkyMatch	Upload matcher that uses CDS's Xmatch service.
ChoiceMode	Output mode which can be used to give the user, via the parameter system, the choice about what mode to use.
ColumnSelectionMapper	Mapper which operates on a user-supplied selection of the columns of the input table.
CombinedColumn	Describes an output column formed by aggregation of values from an input expression.
CombinerParameter	Parameter for specifying Combiner values.
CommandFormatter	Handles export of StiltsCommand objects to external serialization formats.
ConnectionParameter	Parameter for acquiring a connection to a database using JDBC.
ConsumerTask	Abstract task which takes an input table and disposes of it.
ContentCodingParameter	Parameter for configuring HTTP-level compression.
CredibleString	Aggregates a string value and a credibility assessment.
DatalinkLint	DataLink validator task.
DoubleArrayParameter	Parameter for acquiring a fixed-length array of floating point values.
FilterParameter	Parameter which contains a value representing one or more ProcessingSteps.
FixedTablesInput	TablesInput which has a fixed number of input tables.
GridDensityMap	Calculates optionally weighted density maps/histograms on an N-dimensional grid and outputs them in table form.
HomogeneousTablesInput	TablesInput which has a variable number of input tables, treating them all the same as each other.
InputFormatParameter	Parameter for selecting input table format.
InputTableParameter	Parameter for specifying a single input table.
InputTablesParameter	Parameter for specifying an indeterminate number of input tables.
InputTableSpec	Provides the specifications for a single input table.
JoinFixActionParameter	Parameter which can control how column names are renamed if they would otherwise be duplicated in an output table.
JoinFixActionParameter.Fixer	Helper class which defines how suffixes are turned into JoinFixActions.
JoinMapper	TableMapper which joins tables side-by-side.
LineEnder	Defines how line endings are handled when formatting stilts commands.
LineInvoker	Invokes the Stilts tasks using a LineTableEnvironment.
LineTableEnvironment	Execution environment suitable for use with the TTOOLS package.
MapEnvironment	Environment which allows use of ttools tasks from an in-memory context.
MapperTask	Task which maps one or more input tables to an output table.
MocShape	Task for generating MOCs from shape specifications in a table.
MultiCone	SkyConeMatch2 implementation which uses an external Cone Search service.
MultiCopy	Task to copy multiple homogeneously acquired tables to an output container file.
MultiCopyN	Task to add multiple tables, perhaps with different formats and preprocessing, to an output container file.
MultiOutputFormatParameter	Parameter to hold an output format capable of writing multiple tables.
MultiOutputTask	Task which writes multiple tables to a single output file.
OutputFormatParameter	Parameter to hold the format of a table for output.
OutputModeParameter	Parameter for table output mode.
OutputReporterParameter	Parameter for selecting an OutputReporter for use with taplint.
OutputTableParameter	Parameter to hold an output table.
ParquetTool	Utility for examining metadata of Parquet files.
ParquetTool.MetaItem	Describes a metadata item that can be shown to the user.
PixFootprint	Constructs and writes a Multi-Order Coverage map.
PixSample	Samples data from a HEALPix pixel file.
PixSampler	Interrogates a HEALPix all-sky map to sample pixel data.
RegQuery	Performs a registry query.
RowRunnerParameter	Parameter for acquiring a RowRunner.
SeqConcatStarTable	StarTable implementation which concatenates a list of compatible constituent tables in sequence.
Setting	Defines a key-value pair for use in a stilts command line.
SettingGroup	Represents a set of parameter-value pairs to be grouped together for display purposes.
ShowFunctions	Task for browsing available algebraic functions.
SingleMapperTask	MapperTask which has a single input table.
SkyCoordParameter	Utilities for sky coordinate parameters.
SkyDensityMap	Calculates sky density maps and outputs them as tables.
SkyMatch2	Task implementation for simplified sky matching task.
SqlClient	SQL command-line client.
SqlCone	Multiple cone match task which works by doing SQL queries using JDBC.
SqlUpdate	JDBC table column writer task.
StiltsCommand	Represents an abstract model of a STILTS command line.
StiltsServer	Runs STILTS in server mode.
StringMultiParameter	Convenience parameter subclass for getting a sequence of string values.
TableCat	Concatenates multiple homogeneous tables top-to-bottom.
TableCat2	Concatenates two tables top to bottom.
TableCatN	Concatenates N tables top to bottom.
TableCone	Executes a single cone-search-like query to an external DAL service.
TableCopy	Task which copies a single table from input to output.
TableCube	Task implementation for the histogram array creation task.
TableFactoryParameter	Parameter whose value is a StarTableFactory.
TableGroup	Task for performing aggregation operations on groups of rows of an input table.
TableGroup.AggSpec	Defines the aggregation that should be done to form an output column.
TableHistogram	Task for performing a 1D histogram.
TableJoinN	Joins N tables side-to-side.
TableLoop	Creates a single-column table with values dispensed from a for loop.
TableMatch1	Performs an internal (single-table) crossmatch.
TableMatch2	Task implementation for generic pair matching task.
TableMatchN	Permforms a multi-table crossmatch.
TableMultiCopy	General purpose task for copying multiple input tables to an output table container.
TablePipe	TableMapper which does the work for the tpipe command.
TablePlot2D	Task for performing a 2D scatter plot.
TablePlot3D	Task for performing a 3D scatter plot.
TapLint	TAP Validator task.
TapMapper	Mapper that does the work for TapQuerier.
TapQuerier	Performs a TAP query.
TapResultReader	Aggregates parameters used for recovering and delivering the result of a TAP query.
TapResume	Resumes an existing TAP query.
TapServiceParams	Manages a collection of parameters used to generate a TapService.
TapUploadSkyMatch	Upload matcher that uses an external TAP service.
UserFindMode	Mode for upload crossmatches corresponding to the user options.
VariableTablesInput	TablesInput which allows a variable number of input tables, fixed at runtime using an integer parameter.
VOParquetLint	Checks compliance of a Parquet file with the VOParquet convention.
VotCopy	Task which Copies a VOTable XML document intact but with control over the DATA encoding type.
VotLint	Task which performs VOTable checking.
WordsParameter<W>	Parameter which can split its value up into an array of words, each parsed as a parameterised type.
XmlEncodingParameter	Parameter which describes one of the available XML encodings (UTF-8 etc).
XsdValidate	Utility task for XML Schema validation.

Enum Summary

Enum	Description
Credibility	Defines the credibility of a value.
TapResultReader.DeleteMode	Enumeration of UWS job deletion modes.