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## com.vividsolutions.jts.io.gml2
Class GMLHandler

    java.lang.Object
      org.xml.sax.helpers.DefaultHandler
          com.vividsolutions.jts.io.gml2.GMLHandler

All Implemented Interfaces:
  org.xml.sax.ContentHandler, org.xml.sax.DTDHandler, org.xml.sax.EntityResolver, org.xml.sax.ErrorHandler

    public class GMLHandler

extends org.xml.sax.helpers.DefaultHandler

A SAX `DefaultHandler` which builds `Geometry`s from GML2-formatted geometries. An XML parser can delegate SAX events to this handler to parse and building Geometrys.

This handler currently ignores both namespaces and prefixes. Hints:

- If your parent handler is a DefaultHandler register the parent handler to receive the errors and locator calls.
- Use `GeometryStrategies.findStrategy(String, String)` to help check for applicability

Author:
  David Zwiers, Vivid Solutions.
See Also:
  `DefaultHandler`

Constructor Summary
`GMLHandler(GeometryFactory gf, org.xml.sax.ErrorHandler delegate)` Creates a new handler.

Method Summary
`void` | `characters(char[] ch, int start, int length)`
`void` | `endElement(java.lang.String uri, java.lang.String localName, java.lang.String qName)`
`void` | `error(org.xml.sax.SAXParseException e)`
`void` | `fatalError(org.xml.sax.SAXParseException e)`
`protected org.xml.sax.Locator` | `getDocumentLocator()`
`Geometry` | `getGeometry()` Gets the geometry parsed by this handler.
`void` | `ignorableWhitespace(char[] ch, int start, int length)`
`boolean` | `isGeometryComplete()` Tests whether this handler has completed parsing a geometry.
`void` | `setDocumentLocator(org.xml.sax.Locator locator)`
`void` | `startElement(java.lang.String uri, java.lang.String localName, java.lang.String qName, org.xml.sax.Attributes attributes)`
`void` | `warning(org.xml.sax.SAXParseException e)`

Methods inherited from class org.xml.sax.helpers.DefaultHandler
`endDocument, endPrefixMapping, notationDecl, processingInstruction, resolveEntity, skippedEntity, startDocument, startPrefixMapping, unparsedEntityDecl`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### GMLHandler

    public GMLHandler(GeometryFactory gf,
                      org.xml.sax.ErrorHandler delegate)

  Creates a new handler. Allows the user to specify a delegate object for error / warning messages. If the delegate also implements ContentHandler then the document Locator will be passed on.

  Parameters:
    `gf` - Geometry Factory
    `delegate` - Nullable
  See Also:
    `ErrorHandler`, `ContentHandler`, `ContentHandler.setDocumentLocator(org.xml.sax.Locator)`, `Locator`

Method Detail

### isGeometryComplete

    public boolean isGeometryComplete()

  Tests whether this handler has completed parsing a geometry. If this is the case, `getGeometry()` can be called to get the value of the parsed geometry.

  Returns:
    if the parsing of the geometry is complete

### getGeometry

    public Geometry getGeometry()

  Gets the geometry parsed by this handler. This method should only be called AFTER the parser has completed execution

  Returns:
    the parsed Geometry, or a GeometryCollection if more than one geometry was parsed
  Throws:
    `java.lang.IllegalStateException` - if called before the parse is complete

### characters

    public void characters(char[] ch,
                           int start,
                           int length)
                    throws org.xml.sax.SAXException

  Specified by:
    `characters` in interface `org.xml.sax.ContentHandler`
  Overrides:
    `characters` in class `org.xml.sax.helpers.DefaultHandler`
  Throws:
    `org.xml.sax.SAXException`
  See Also:
    `DefaultHandler.characters(char[], int, int)`

### ignorableWhitespace

    public void ignorableWhitespace(char[] ch,
                                    int start,
                                    int length)
                             throws org.xml.sax.SAXException

  Specified by:
    `ignorableWhitespace` in interface `org.xml.sax.ContentHandler`
  Overrides:
    `ignorableWhitespace` in class `org.xml.sax.helpers.DefaultHandler`
  Throws:
    `org.xml.sax.SAXException`
  See Also:
    `DefaultHandler.ignorableWhitespace(char[], int, int)`

### endElement

    public void endElement(java.lang.String uri,
                           java.lang.String localName,
                           java.lang.String qName)
                    throws org.xml.sax.SAXException

  Specified by:
    `endElement` in interface `org.xml.sax.ContentHandler`
  Overrides:
    `endElement` in class `org.xml.sax.helpers.DefaultHandler`
  Throws:
    `org.xml.sax.SAXException`
  See Also:
    `DefaultHandler.endElement(java.lang.String, java.lang.String, java.lang.String)`

### startElement

    public void startElement(java.lang.String uri,
                             java.lang.String localName,
                             java.lang.String qName,
                             org.xml.sax.Attributes attributes)
                      throws org.xml.sax.SAXException

  Specified by:
    `startElement` in interface `org.xml.sax.ContentHandler`
  Overrides:
    `startElement` in class `org.xml.sax.helpers.DefaultHandler`
  Throws:
    `org.xml.sax.SAXException`
  See Also:
    `DefaultHandler.startElement(java.lang.String, java.lang.String, java.lang.String, org.xml.sax.Attributes)`

### setDocumentLocator

    public void setDocumentLocator(org.xml.sax.Locator locator)

  Specified by:
    `setDocumentLocator` in interface `org.xml.sax.ContentHandler`
  Overrides:
    `setDocumentLocator` in class `org.xml.sax.helpers.DefaultHandler`
  See Also:
    `DefaultHandler.setDocumentLocator(org.xml.sax.Locator)`

### getDocumentLocator

    protected org.xml.sax.Locator getDocumentLocator()

### fatalError

    public void fatalError(org.xml.sax.SAXParseException e)
                    throws org.xml.sax.SAXException

  Specified by:
    `fatalError` in interface `org.xml.sax.ErrorHandler`
  Overrides:
    `fatalError` in class `org.xml.sax.helpers.DefaultHandler`
  Throws:
    `org.xml.sax.SAXException`
  See Also:
    `DefaultHandler.fatalError(org.xml.sax.SAXParseException)`

### error

    public void error(org.xml.sax.SAXParseException e)
               throws org.xml.sax.SAXException

  Specified by:
    `error` in interface `org.xml.sax.ErrorHandler`
  Overrides:
    `error` in class `org.xml.sax.helpers.DefaultHandler`
  Throws:
    `org.xml.sax.SAXException`
  See Also:
    `DefaultHandler.error(org.xml.sax.SAXParseException)`

### warning

    public void warning(org.xml.sax.SAXParseException e)
                 throws org.xml.sax.SAXException

  Specified by:
    `warning` in interface `org.xml.sax.ErrorHandler`
  Overrides:
    `warning` in class `org.xml.sax.helpers.DefaultHandler`
  Throws:
    `org.xml.sax.SAXException`
  See Also:
    `DefaultHandler.warning(org.xml.sax.SAXParseException)`

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