Package org.codice.ddf.transformer.xml.streaming.impl

Class GmlHandler

java.lang.Object

org.codice.ddf.transformer.xml.streaming.AbstractSaxEventHandler

org.codice.ddf.transformer.xml.streaming.impl.GmlHandler

All Implemented Interfaces:

org.codice.ddf.transformer.xml.streaming.SaxEventHandler, ContentHandler

public class GmlHandler
extends org.codice.ddf.transformer.xml.streaming.AbstractSaxEventHandler

A sax event handler to handle GML sax events and stores the data as a WKT. Delegates GML events to GMLHandler. Uses WKTWriter to write the Geometries to WKT. Note: ONLY CAN PARSE GML2 points. Will throw hard-to-debug Null Pointer Exceptions if used with GML3 or other GML2 geometries.

Constructor Summary

Constructors

Constructor	Description
GmlHandler(org.locationtech.jts.io.gml2.GMLHandler gmlHandler, org.codice.ddf.transformer.xml.streaming.Gml3ToWkt gml3Converter)

Method Summary

Modifier and Type	Method	Description
void	characters(char[] ch, int start, int length)	Takes in a sax event from SaxEventHandlerDelegate, and if it is a gml:Point or a sub-element of a gml:Point, it will * hand the event off to the GML handler for further parsing.
void	endElement(String namespaceURI, String localName, String qName)	Takes in a sax event from SaxEventHandlerDelegate, and if it is a gml:Point or a sub-element of a gml:Point, it will * hand the event off to the GML handler for further parsing.
List<ddf.catalog.data.Attribute>	getAttributes()
Set<ddf.catalog.data.AttributeDescriptor>	getSupportedAttributeDescriptors()
void	startElement(String uri, String localName, String qName, Attributes attributes)	Takes in a sax event from SaxEventHandlerDelegate, and if it is a gml:Point or a sub-element of a gml:Point, it will hand the event off to the GML handler for further parsing.
void	startPrefixMapping(String prefix, String uri)

Methods inherited from class org.codice.ddf.transformer.xml.streaming.AbstractSaxEventHandler

endDocument, endPrefixMapping, ignorableWhitespace, processingInstruction, setDocumentLocator, skippedEntity, startDocument

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.xml.sax.ContentHandler

declaration

Constructor Details

GmlHandler

public GmlHandler(org.locationtech.jts.io.gml2.GMLHandler gmlHandler,
 org.codice.ddf.transformer.xml.streaming.Gml3ToWkt gml3Converter)

Method Details

getAttributes

public List<ddf.catalog.data.Attribute> getAttributes()

Returns:

list of Attribute (should be all <Metacard.GEOGRAPHY, WKT strings>)

getSupportedAttributeDescriptors

public Set<ddf.catalog.data.AttributeDescriptor> getSupportedAttributeDescriptors()

startPrefixMapping

public void startPrefixMapping(String prefix,
 String uri)
                        throws SAXException

Specified by:

startPrefixMapping in interface ContentHandler

Overrides:

startPrefixMapping in class org.codice.ddf.transformer.xml.streaming.AbstractSaxEventHandler

Throws:

SAXException

startElement

public void startElement(String uri,
 String localName,
 String qName,
 Attributes attributes)

Takes in a sax event from SaxEventHandlerDelegate, and if it is a gml:Point or a sub-element of a gml:Point, it will hand the event off to the GML handler for further parsing.

Parameters:

uri - the URI that is passed in by SaxEventHandlerDelegate

localName - the localName that is passed in by SaxEventHandlerDelegate

qName - the qName that is passed in by SaxEventHandlerDelegate

attributes - the attributes that are passed in by SaxEventHandlerDelegate

endElement

public void endElement(String namespaceURI,
 String localName,
 String qName)

Takes in a sax event from SaxEventHandlerDelegate, and if it is a gml:Point or a sub-element of a gml:Point, it will * hand the event off to the GML handler for further parsing. If it is a gml:Point, the point is stored as a WKT in the attributes list

Parameters:

namespaceURI - the namespaceURI that is passed in by SaxEventHandlerDelegate

localName - the localName that is passed in by SaxEventHandlerDelegate

qName - the qName that is passed in by SaxEventHandlerDelegate

characters

public void characters(char[] ch,
 int start,
 int length)

Takes in a sax event from SaxEventHandlerDelegate, and if it is a gml:Point or a sub-element of a gml:Point, it will * hand the event off to the GML handler for further parsing.

Parameters:

ch - the ch that is passed in by SaxEventHandlerDelegate

start - the start that is passed in by SaxEventHandlerDelegate

length - the length that is passed in by SaxEventHandlerDelegate