Examples of org.geotools.xml.filter.FilterEncodingPreProcessor

org.geotools.xml.filter.FilterEncodingPreProcessor
Prepares a filter for XML encoded for interoperability with another system. It will behave differently depending on the compliance level chosen. A new request will have to be made and the features will have to be tested again on the client side if there are any FidFilters in the filter. Consider the following to understand why:
```
 and { nullFilter or{ fidFilter nullFilter } } 
```
for strict it would throw an exception, for low it would be left alone, but for Medium it would end up as:
```
 and{ nullFilter nullFilter } 
```
and getFids() would return the fids in the fidFilter. So the final filter would (this is not standard but a common implementation) return the results of the and filter as well as all the features that match the fids. Which is more than the original filter would accept. The XML Document writer can operate at different levels of compliance. The geotools level is extremely flexible and forgiving.
All NOT(FidFilter) are changed to Filter.INCLUDE. So make sure that the filter is processed again on the client with the original filter
For a description of the difference Compliance levels that can be used see
- {@link XMLHandlerHints#VALUE_FILTER_COMPLIANCE_LOW}
- {@link XMLHandlerHints#VALUE_FILTER_COMPLIANCE_MEDIUM}
- {@link XMLHandlerHints#VALUE_FILTER_COMPLIANCE_HIGH}
@author Jesse Eichar @source $URL$

        super(store);
        compliance = filterCompliance;
    }


    protected  FeatureReader<SimpleFeatureType, SimpleFeature> wrapWithFilteringFeatureReader(Filter postFilter,  FeatureReader<SimpleFeatureType, SimpleFeature> reader, Filter processedFilter) {
        FilterEncodingPreProcessor visitor = new FilterEncodingPreProcessor(COMPLIANCE_LEVEL);
        processedFilter.accept(visitor, null);
        
        if( visitor.requiresPostProcessing() )
            return new FilteringFeatureReader<SimpleFeatureType, SimpleFeature>(reader, processedFilter);
        else
            return new FilteringFeatureReader<SimpleFeatureType, SimpleFeature>(reader, postFilter);
            
    }

View Full Code Here

        public StrictFeatureReader(Transaction transaction, Query query, Integer level) throws IOException {
            init(transaction, query, level);
        }


        protected void init( Transaction transaction, Query query, Integer level ) throws IOException {
            FilterEncodingPreProcessor visitor = new FilterEncodingPreProcessor(level);
            query.getFilter().accept(visitor,null);
            
            this.transaction=transaction;
            if( visitor.requiresPostProcessing() && query.getPropertyNames()!=Query.ALL_NAMES){
                FilterAttributeExtractor attributeExtractor=new FilterAttributeExtractor();
                query.getFilter().accept( attributeExtractor, null );
                Set<String> properties = new HashSet<String>(attributeExtractor.getAttributeNameSet());
                properties.addAll(Arrays.asList(query.getPropertyNames()));
                this.query = new Query(query);
                this.query.setPropertyNames((String[]) properties.toArray(new String[0]));
            } else {
                this.query=query;
            }
            
            this.filter=visitor.getFilter();


            Query nonFidQuery=new Query(query);
            Id fidFilter = visitor.getFidFilter();
            nonFidQuery.setFilter(fidFilter);
            if( fidFilter.getIDs().size()>0 ){
                delegate = StrictWFSStrategy.super.createFeatureReader(transaction, nonFidQuery);
            }else{
                delegate=nextReader();

View Full Code Here

TOP

Related Classes of org.geotools.xml.filter.FilterEncodingPreProcessor

org.geotools.data.wfs.v1_0_0.StrictWFSStrategy

org.geotools.data.wfs.v1_0_0.StrictWFSStrategy$StrictFeatureReader

org.opengis.filter.BinaryLogicOperator

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.