Filter is set before PolygonSymbolizer

[ustroetz]

I am running this script:

from sld import *
sld_doc = StyledLayerDescriptor() 

# Create Layer
nl = sld_doc.create_namedlayer('Drivetime Polygon Style ')
us = nl.create_userstyle()
us.Title = 'Drivetime'


# Create Rule
fts = us.create_featuretypestyle()
r1 = fts.create_rule('Interval 1', PolygonSymbolizer)

# Create Filter
f1 = Filter(r1)
f1.PropertyIsEqualTo = PropertyCriterion(f1, 'PropertyIsEqualTo')
f1.PropertyIsEqualTo.PropertyName = 'drivetime' 
f1.PropertyIsEqualTo.Literal = 'v1'

r1.Filter = f1

content = sld_doc.as_sld(pretty_print=True)
print content

And it creates this sld file:

<sld:StyledLayerDescriptor xmlns:sld="http://www.opengis.net/sld" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ogc="http://www.opengis.net/ogc" version="1.0.0">
  <sld:NamedLayer>
    <sld:Name>Drivetime Polygon Style </sld:Name>
    <sld:UserStyle>
      <sld:Title>Drivetime</sld:Title>
      <sld:FeatureTypeStyle>
        <sld:Rule>
          <sld:Title>Interval 1</sld:Title>
          <sld:PolygonSymbolizer>
            <sld:Fill>
              <sld:CssParameter name="fill">#AAAAAA</sld:CssParameter>
            </sld:Fill>
            <sld:Stroke>
              <sld:CssParameter name="stroke">#000000</sld:CssParameter>
              <sld:CssParameter name="stroke-width">1</sld:CssParameter>
            </sld:Stroke>
          </sld:PolygonSymbolizer>
          <ogc:Filter>
            <ogc:PropertyIsEqualTo>
              <ogc:PropertyName>drivetime</ogc:PropertyName>
              <ogc:Literal>v1</ogc:Literal>
            </ogc:PropertyIsEqualTo>
          </ogc:Filter>
        </sld:Rule>
      </sld:FeatureTypeStyle>
    </sld:UserStyle>
  </sld:NamedLayer>
</sld:StyledLayerDescriptor>

The file is not valid, because the PolygonSymbolizer is before the filter. Is this a bug or am I doing something wrong?

[dzwarg]

Hello @ustroetz,

You must 'normalize' the doc before serializing it. You can call the 'normalize' method on the SLD object to perform this re-arrangement.

# Rearranges filters in the order defined by the schema
# note: the sld object is modified in place
sld_doc.normalize()

In addition, you can check the validity of the sld against the schema with validate, too:

# Validate that an SLD conforms to the schema
sld_doc.validate()

[ustroetz]

Oh cool! Thanks for letting me know dzwarg!