Class GMLFilterDocument
- All Implemented Interfaces:
ContentHandler
,DTDHandler
,EntityResolver
,ErrorHandler
,XMLFilter
,XMLReader
This filter separates and passes GML events to a GMLHandlerGeometry. The main simplification that it performs is to pass along coordinates as an abstracted method call, regardless of their notation in the GML (Coord vs. Coordinates). This call turns the coordinates into doubles and makes sure that it distinguishes between 2 and 3 value coordinates.
The filter also handles some more subtle processing, including handling different delimiters (decimal, coordinate, tuple) that may be used by more outlandish GML generators.
- Author:
- Rob Hranac, Vision for New York
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoid
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
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
Methods inherited from class Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods inherited from interface ContentHandler
declaration
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Constructor Details
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GMLFilterDocument
Constructor with parent.- Parameters:
parent
- Parent of the filter: must implement GMLHandlerGeometry.
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Method Details
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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.Modified by Sean Geoghegan to create new StringBuffers when entering a coord or coordinate element.
- 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
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.Modified by Sean Geoghegan to append character data to buffer when inside a coordinate or coord element. SAX doesn't guarentee that all the character data of an element will be passed to the character method in one call, it may be split up into chunks.
- 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
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.Modified by Sean Geoghegan. When we reach the end of a coord or coordinate element, then the buffer is passed to the handler for processing.
- 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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