Package org.geotools.gml
Class GMLFilterGeometry
- Object
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- XMLFilterImpl
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- GMLFilterGeometry
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- All Implemented Interfaces:
GMLHandlerGeometry
,ContentHandler
,DTDHandler
,EntityResolver
,ErrorHandler
,XMLFilter
,XMLReader
public class GMLFilterGeometry extends XMLFilterImpl implements GMLHandlerGeometry
LEVEL2 saxGML4j GML filter: translates coordinates and GML events into OGC simple types.This filter simply reads in the events and coordinates passed to it by its GMLFilterDocument child and converts them into JTS objects. Note that it passes through anything not specifically sent to it by GMLFilterDocument (i.e. more or less everything not in geometry.xsd). The parent of this filter must implement GMLHandlerJTS in order to receive the JTS objects passed by this filter.
- Author:
- Rob Hranac, Vision for New York
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Constructor Summary
Constructors Constructor Description GMLFilterGeometry(GMLHandlerJTS parent)
Constructor with parent, which must implement GMLHandlerJTS.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
characters(char[] ch, int start, int length)
Reads the only internal characters read by pure GML parsers, which are coordinates.void
endElement(String namespaceURI, String localName, String qName)
Checks for GML element end and - if not a coordinates element - sends it directly on down the chain to the appropriate parent handler.void
geometryEnd(String localName)
Manages the end of a new main or sub geometry.void
geometryStart(String localName, Attributes atts)
Manages the start of a new main or sub geometry.void
geometrySub(String localName)
Manages a sub geometry, which simply means always pass it to the current content handler as a sub.void
gmlCoordinates(double x, double y)
Gets a coordinate from the child and passes it to the current handler as an add request.void
gmlCoordinates(double x, double y, double z)
Gets a coordinate from the child and passes it to the current handler as an add request.void
startElement(String namespaceURI, String localName, String qName, Attributes atts)
Checks for GML element start and - if not a coordinates element - sends it directly on down the chain to the appropriate parent handler.-
Methods inherited from class XMLFilterImpl
endDocument, endPrefixMapping, error, fatalError, getContentHandler, getDTDHandler, getEntityResolver, getErrorHandler, getFeature, getParent, getProperty, ignorableWhitespace, notationDecl, parse, parse, processingInstruction, resolveEntity, setContentHandler, setDocumentLocator, setDTDHandler, setEntityResolver, setErrorHandler, setFeature, setParent, setProperty, skippedEntity, startDocument, startPrefixMapping, unparsedEntityDecl, warning
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Methods inherited from class Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface ContentHandler
endDocument, endPrefixMapping, ignorableWhitespace, processingInstruction, setDocumentLocator, skippedEntity, startDocument, startPrefixMapping
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Constructor Detail
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GMLFilterGeometry
public GMLFilterGeometry(GMLHandlerJTS parent)
Constructor with parent, which must implement GMLHandlerJTS.- Parameters:
parent
- The parent of this filter.
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Method Detail
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geometryStart
public void geometryStart(String localName, Attributes atts) throws SAXException
Manages the start of a new main or sub geometry. This method looks at the status of the current handler and either returns a new sub-handler (if the last one was successfully returned already) or passes the element start notification along to the current handler as a sub geometry notice.- Specified by:
geometryStart
in interfaceGMLHandlerGeometry
- Parameters:
localName
- The local name of the geometry, which corresponds to an OGC simple feature type.atts
- The attributes of the geometry, including SRID, etc.- Throws:
SAXException
- parser error.
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geometryEnd
public void geometryEnd(String localName) throws SAXException
Manages the end of a new main or sub geometry. This method looks at the status of the current handler and either returns the finished JTS object to its parent or passes the element end notification along to the current handler as a sub geometry notice.- Specified by:
geometryEnd
in interfaceGMLHandlerGeometry
- Parameters:
localName
- The local name of the geometry, which corresponds to an OGC simple feature type.- Throws:
SAXException
- parser error.
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geometrySub
public void geometrySub(String localName) throws SAXException
Manages a sub geometry, which simply means always pass it to the current content handler as a sub.- Specified by:
geometrySub
in interfaceGMLHandlerGeometry
- Parameters:
localName
- The local name of the geometry, which corresponds to an OGC simple feature type.- Throws:
SAXException
- parser error.
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gmlCoordinates
public void gmlCoordinates(double x, double y) throws SAXException
Gets a coordinate from the child and passes it to the current handler as an add request.- Specified by:
gmlCoordinates
in interfaceGMLHandlerGeometry
- Parameters:
x
- The X coordinate of the received coordinate.y
- The Y coordinate of the received coordinate.- Throws:
SAXException
- parser error.
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gmlCoordinates
public void gmlCoordinates(double x, double y, double z) throws SAXException
Gets a coordinate from the child and passes it to the current handler as an add request.- Specified by:
gmlCoordinates
in interfaceGMLHandlerGeometry
- Parameters:
x
- The X coordinate of the received coordinate.y
- The Y coordinate of the received coordinate.z
- The Z coordinate of the received coordinate.- Throws:
SAXException
- parser error.
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startElement
public void startElement(String namespaceURI, String localName, String qName, Attributes atts) throws SAXException
Checks for GML element start and - if not a coordinates element - sends it directly on down the chain to the appropriate parent handler. If it is a coordinates (or coord) element, it uses internal methods to set the current state of the coordinates reader appropriately.- Specified by:
startElement
in interfaceContentHandler
- Overrides:
startElement
in classXMLFilterImpl
- Parameters:
namespaceURI
- The namespace of the element.localName
- The local name of the element.qName
- The full name of the element, including namespace prefix.atts
- The element attributes.- Throws:
SAXException
- Some parsing error occurred while reading coordinates.
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characters
public void characters(char[] ch, int start, int length) throws SAXException
Reads the only internal characters read by pure GML parsers, which are coordinates. These coordinates are sent to the coordinates reader class which interprets them appropriately, depending on its current state.- Specified by:
characters
in interfaceContentHandler
- Overrides:
characters
in classXMLFilterImpl
- Parameters:
ch
- Raw coordinate string from the GML document.start
- Beginning character position of raw coordinate string.length
- Length of the character string.- Throws:
SAXException
- Some parsing error occurred while reading coordinates.
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endElement
public void endElement(String namespaceURI, String localName, String qName) throws SAXException
Checks for GML element end and - if not a coordinates element - sends it directly on down the chain to the appropriate parent handler. If it is a coordinates (or coord) element, it uses internal methods to set the current state of the coordinates reader appropriately.- Specified by:
endElement
in interfaceContentHandler
- Overrides:
endElement
in classXMLFilterImpl
- Parameters:
namespaceURI
- The namespace of the element.localName
- The local name of the element.qName
- The full name of the element, including namespace prefix.- Throws:
SAXException
- Some parsing error occurred while reading coordinates.
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