org.geotools.referencing.wkt
Class Parser

java.lang.Object
  java.text.Format
      org.geotools.referencing.wkt.AbstractParser
          org.geotools.referencing.wkt.MathTransformParser
              org.geotools.referencing.wkt.Parser

All Implemented Interfaces:

java.lang.Cloneable, java.io.Serializable

public class Parser

extends MathTransformParser

Parser for Well Known Text (WKT). This parser can parse math transform objects as well, which is part of the WKT's element.

Since:

2.0

Version:

$Id: Parser.java 17672 2006-01-19 00:25:55Z desruisseaux $

Author:

Remi Eve, Martin Desruisseaux

See Also:

Well Know Text specification, OGC WKT Coordinate System Issues, Serialized Form

Nested Class Summary

Nested classes inherited from class java.text.Format

java.text.Format.Field

Field Summary

protected org.opengis.referencing.crs.CRSFactory	crsFactory The factory to use for creating coordinate reference systems.
protected org.opengis.referencing.cs.CSFactory	csFactory The factory to use for creating coordinate systems.
protected org.opengis.referencing.datum.DatumFactory	datumFactory The factory to use for creating datum.

Fields inherited from class org.geotools.referencing.wkt.MathTransformParser

mtFactory

Constructor Summary

Parser()
Constructs a parser using the default set of symbols and factories.

Parser(Symbols symbols)
Constructs a parser for the specified set of symbols using default factories.

Parser(Symbols symbols, org.opengis.referencing.datum.DatumFactory datumFactory, org.opengis.referencing.cs.CSFactory csFactory, org.opengis.referencing.crs.CRSFactory crsFactory, org.opengis.referencing.operation.MathTransformFactory mtFactory)
Constructs a parser for the specified set of symbols using the specified factories.

Parser(Symbols symbols, FactoryGroup factories)
Constructs a parser for the specified set of symbols using the specified set of factories.

Method Summary

static java.lang.Class	getClassOf(java.lang.String element) Returns the class of the specified WKT element.
static void	main(java.lang.String[] args) Read WKT strings from the standard input stream and reformat them to the standard output stream.
protected java.lang.Object	parse(Element element) Parses the next element in the specified Well Know Text (WKT) tree.
org.opengis.referencing.crs.CoordinateReferenceSystem	parseCoordinateReferenceSystem(java.lang.String text) Parses a coordinate reference system element.

Methods inherited from class org.geotools.referencing.wkt.MathTransformParser

parseMathTransform

Methods inherited from class org.geotools.referencing.wkt.AbstractParser

format, getAuthority, getTree, parseObject, parseObject, reformat, setAuthority

Methods inherited from class java.text.Format

clone, format, formatToCharacterIterator

Methods inherited from class java.lang.Object

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

Field Detail

datumFactory

protected final org.opengis.referencing.datum.DatumFactory datumFactory

The factory to use for creating datum.

csFactory

protected final org.opengis.referencing.cs.CSFactory csFactory

The factory to use for creating coordinate systems.

crsFactory

protected final org.opengis.referencing.crs.CRSFactory crsFactory

The factory to use for creating coordinate reference systems.

Constructor Detail

Parser

public Parser()

Constructs a parser using the default set of symbols and factories.

Parser

public Parser(Symbols symbols)

Constructs a parser for the specified set of symbols using default factories.

Parameters:

symbols - The symbols for parsing and formatting numbers.

To Do:

Pass hints in argument.

Parser

public Parser(Symbols symbols,
              FactoryGroup factories)

Constructs a parser for the specified set of symbols using the specified set of factories.

Parameters:

symbols - The symbols for parsing and formatting numbers.

factories - The factories to use.

Parser

public Parser(Symbols symbols,
              org.opengis.referencing.datum.DatumFactory datumFactory,
              org.opengis.referencing.cs.CSFactory csFactory,
              org.opengis.referencing.crs.CRSFactory crsFactory,
              org.opengis.referencing.operation.MathTransformFactory mtFactory)

Constructs a parser for the specified set of symbols using the specified factories.

Parameters:

symbols - The symbols for parsing and formatting numbers.

datumFactory - The factory to use for creating datum.

csFactory - The factory to use for creating coordinate systems.

crsFactory - The factory to use for creating coordinate reference systems.

mtFactory - The factory to use for creating math transform objects.

Method Detail

parseCoordinateReferenceSystem

public org.opengis.referencing.crs.CoordinateReferenceSystem parseCoordinateReferenceSystem(java.lang.String text)
                                                                                     throws java.text.ParseException

Parses a coordinate reference system element.

Parameters:

text - The text to be parsed.

Returns:

The coordinate reference system.

Throws:

java.text.ParseException - if the string can't be parsed.

parse

protected java.lang.Object parse(Element element)
                          throws java.text.ParseException

Parses the next element in the specified Well Know Text (WKT) tree.

Overrides:

parse in class MathTransformParser

Parameters:

element - The element to be parsed.

Returns:

The object.

Throws:

java.text.ParseException - if the element can't be parsed.

To Do:

All sequences of if ("FOO".equals(keyword)) in this method and other methods of this class and subclasses, could be optimized with a statement.

getClassOf

public static java.lang.Class getClassOf(java.lang.String element)

Returns the class of the specified WKT element. For example for this method returns ProjectedCRS.class for element "".

Parameters:

element - The WKT element name.

Returns:

The GeoAPI class of the specified element, or if unknow.

main

public static void main(java.lang.String[] args)

Read WKT strings from the standard input stream and reformat them to the standard output stream. The input is read until it reach the end-of-file ( if reading from the keyboard), or until an unparsable WKT has been hit. Optional arguments are:

-authority <name>	The authority to prefer when choosing WKT entities names.
-indentation <value>	Set the indentation (0 for output on a single line)
-encoding <code>	Set the character encoding
-locale <language>	Set the language for the output (e.g. "fr" for French)