uk.ac.starlink.table.formats

Class RowEvaluator

java.lang.Object

uk.ac.starlink.table.formats.RowEvaluator

public class RowEvaluator
extends Object

Examines unknown rows (arrays of strings) to work out what they contain. By repeatedly calling submitRow(java.util.List<java.lang.String>) the evaluator can refine its idea of what kind of data is represented by each column.

Since:

21 Sep 2004

Author:

Mark Taylor (Starlink)

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	RowEvaluator.Decoder Interface for an object that can turn a string into a cell content object.
static class	RowEvaluator.Metadata Helper class used to group quantities which describe what the data types found in the columns of a table are.

Field Summary

Fields

Modifier and Type	Field and Description
static Pattern	ISO8601_REGEX Regular expression for ISO 8601 dates.

Constructor Summary

Constructors

Constructor and Description
RowEvaluator() Constructs a new RowEvaluator which will work out the number of columns from the data.
RowEvaluator(int ncol) Constructs a new RowEvaluator which will examine rows with a fixed number of columns.

Method Summary

Modifier and Type	Method and Description
RowEvaluator.Metadata	getMetadata() Returns information gleaned from previous submitRow calls about the kind of data that appears to be in the columns.
void	submitRow(List<String> row) Looks at a given row (list of strings) and records information about what sort of things it looks like it contains.

Methods inherited from class java.lang.Object

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

Field Detail

ISO8601_REGEX

public static final Pattern ISO8601_REGEX

Regular expression for ISO 8601 dates.

Constructor Detail

RowEvaluator

public RowEvaluator()

Constructs a new RowEvaluator which will work out the number of columns from the data.

RowEvaluator

public RowEvaluator(int ncol)

Constructs a new RowEvaluator which will examine rows with a fixed number of columns.

Parameters:

ncol - column count

Method Detail

submitRow

public void submitRow(List<String> row)
               throws TableFormatException

Looks at a given row (list of strings) and records information about what sort of things it looks like it contains.

Parameters:

row - ncol-element list of strings

Throws:

TableFormatException - if the number of elements in row is not the same as on the first call

getMetadata

public RowEvaluator.Metadata getMetadata()

Returns information gleaned from previous submitRow calls about the kind of data that appears to be in the columns.

Returns:

metadata