Package org.geotools.filter

Class ExpressionSAXParser

Object
ExpressionSAXParser
public class ExpressionSAXParser extends Object
Author:
Rob Hranac, TOPP
, Chris Holmes, TOPP

  • Constructor Details

    • ExpressionSAXParser

      public ExpressionSAXParser()

    • ExpressionSAXParser

      public ExpressionSAXParser(FilterFactory factory)

    • ExpressionSAXParser

      public ExpressionSAXParser(SimpleFeatureType schema)
      Constructor with a schema to read the attribute againset.
      Parameters:
      schema - The schema for attributes (null is fine, as the code for this is not in place.

    • ExpressionSAXParser

      public ExpressionSAXParser(SimpleFeatureType schema, FilterFactory factory)
      Constructor injection

  • Method Details

    • setFilterFactory

      public void setFilterFactory(FilterFactory factory)
      Setter injection

    • start

      public void start(String declaredType, Attributes atts) throws IllegalFilterException
      Initializes the factory to create a new expression. Called when the filter handler reaches a new expression.
      Parameters:
      declaredType - The string representation of the expression type.
      Throws:
      IllegalFilterException - If there are problems creating expressions.

    • end

      public void end(String message) throws IllegalFilterException
      Called when the filter handler has reached the end of an expression
      Parameters:
      message - the expression to end.
      Throws:
      IllegalFilterException - If there are problems creating exceptions.

    • isReady

      public boolean isReady()
      Checks to see if this expression is ready to be returned.
      Returns:
      true if the expression is ready to be returned, false otherwise.

    • message

      public void message(String message, boolean convertToNumber) throws IllegalFilterException
      Handles incoming characters.
      Parameters:
      message - the incoming chars from the SAX handler.
      Throws:
      IllegalFilterException - If there are problems with filter constrcution.
      TODO:
      TODO: this function is a mess, but it's mostly due to filters being loosely coupled with schemas, so we have to make a lot of guesses., TODO: Revisit stripping leading characters. Needed now to get things working, and may be the best choice in the end, but it should be thought through more.

    • geometry

      public void geometry(Geometry geometry) throws IllegalFilterException
      Gets geometry.
      Parameters:
      geometry - The geometry from the filter.
      Throws:
      IllegalFilterException - If there are problems creating expression.

    • create

      public Expression create()
      Creates and returns the expression.
      Returns:
      The expression currently held by this parser.
      TODO:
      REVISIT: shouldn't this check the readyFlag?

    • convertType

      protected static short convertType(String expType)
      Converts the string representation of the expression to the DefaultExpression short type.
      Parameters:
      expType - Type of filter for check.
      Returns:
      the short representation of the expression.

    • getFunctionName

      public String getFunctionName(Attributes map)
      stolen from the DOM parser -- for a list of attributes, find the "name" ie. for return "geomLength" NOTE: if someone uses or <Function ogc:name="geomLength"> this will work, if they use a different prefix, it will not.