Examples of org.opengis.filter.Filter.accept()

org.opengis.filter.Filter.accept()
Accepts a visitor.
Implementations of all subinterfaces must have with a method whose content is the following:
```
return visitor. {@linkplain FilterVisitor#visit visit}(this, extraData);
```

    filterCapabilitiesMask.addType(FilterFunction_geometryType.class);
    filterCapabilitiesMask.addAll(FilterCapabilities.SIMPLE_COMPARISONS_OPENGIS);
        filterCapabilitiesMask.addAll(FilterCapabilities.LOGICAL_OPENGIS);
    visitor=newVisitor(filterCapabilitiesMask);


        filter.accept(visitor, null);
    
    assertEquals(filter1, visitor.getFilterPre());
    assertEquals(filter2, visitor.getFilterPost());
    
  }

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        visitor = newVisitor(simpleLogicalCaps);


        f2 = ff.bbox(geomAtt, 10.0, 20.0, 10.0, 20.0, "");
        orFilter = ff.or(f1, f2);
        orFilter.accept(visitor, null);


        // f1 could be pre-processed but since f2 can't all the processing has to be done on the
        // client side :-(
        assertEquals(Filter.INCLUDE, visitor.getFilterPre());
        assertEquals(orFilter, visitor.getFilterPost());

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    public void testVisitFidFilter() throws Exception {
        HashSet ids = new HashSet();
        ids.add(ff.featureId("david"));
        Filter filter = ff.id(ids);
        visitor = newVisitor(newCapabilities(Id.class));
        filter.accept(visitor, null);


        assertEquals(Filter.INCLUDE, visitor.getFilterPost());
        assertEquals(filter, visitor.getFilterPre());
    }

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        ids.add(ff.featureId("david"));
        Filter idFilter = ff.id(ids);


        // no Id Capabilities
        visitor = newVisitor(Capabilities.SIMPLE_COMPARISONS_OPENGIS);
        idFilter.accept(visitor, null);
        
        assertEquals(Filter.INCLUDE, visitor.getFilterPre());
        assertEquals(idFilter, visitor.getFilterPost());        
    }

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        simpleLogicalCaps.addType(BBOX.class);
        visitor = newVisitor(simpleLogicalCaps);


        Filter filter = createFunctionFilter();


        filter.accept(visitor, null);


        assertEquals(filter, visitor.getFilterPost());
        assertEquals(Filter.INCLUDE, visitor.getFilterPre());


        simpleLogicalCaps.addName(testFunction.getName(), testFunction.getParameters().size());

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        assertEquals(Filter.INCLUDE, visitor.getFilterPre());


        simpleLogicalCaps.addName(testFunction.getName(), testFunction.getParameters().size());
        visitor = newVisitor(simpleLogicalCaps);


        filter.accept(visitor, null);


        assertEquals(Filter.INCLUDE, visitor.getFilterPost());
        assertEquals(filter, visitor.getFilterPre());
    }

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        Filter funtionFilter = createFunctionFilter();
        Filter geomFilter = ff.bbox(geomAtt, 10, 20, 10, 20, "");


        Filter andFilter = ff.and(funtionFilter, geomFilter);


        andFilter.accept(visitor, null);


        assertEquals(funtionFilter.toString(), visitor.getFilterPost().toString());
        assertEquals(geomFilter.toString(), visitor.getFilterPre().toString());


        simpleLogicalCaps.addName(testFunction.getName(), testFunction.getParameters().size());

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        assertEquals(geomFilter.toString(), visitor.getFilterPre().toString());


        simpleLogicalCaps.addName(testFunction.getName(), testFunction.getParameters().size());
        visitor = newVisitor(simpleLogicalCaps);


        andFilter.accept(visitor, null);


        assertEquals(Filter.INCLUDE, visitor.getFilterPost());
        assertEquals(andFilter, visitor.getFilterPre());
    }

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        Filter funtionFilter = createFunctionFilter();
        Filter geomFilter = ff.bbox(geomAtt, 10, 20, 10, 20, "");


        Filter orFilter = ff.or(funtionFilter, geomFilter);


        orFilter.accept(visitor, null);


        assertEquals(Filter.INCLUDE, visitor.getFilterPre());
        assertEquals(orFilter, visitor.getFilterPost());


        simpleLogicalCaps.addName(testFunction.getName(), testFunction.getParameters().size());

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        assertEquals(orFilter, visitor.getFilterPost());


        simpleLogicalCaps.addName(testFunction.getName(), testFunction.getParameters().size());
        visitor = newVisitor(simpleLogicalCaps);


        orFilter.accept(visitor, null);


        assertEquals(Filter.INCLUDE, visitor.getFilterPost());
        assertEquals(orFilter, visitor.getFilterPre());


    }

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