Examples of FeatureReader

com.sun.xml.ws.config.metro.dev.FeatureReader
Parses a XML fragment and is expected to return a corresponding WebServiceFeature. @author Fabian Ritzmann
org.geotools.data.FeatureReader
The low-level interface for reading Features. Will use the underlying AttributeReader and the given FeatureType to create new Features.
Typical use is as follows:
```
 FeatureReader reader = null; try{ for( reader = data.getFeatureReader( filter ); reader.hasNext(); ){ f = reader.next(); ... } } catch (IOException problem){ ... } finally { if( reader != null ){ try { reader.close(); } catch( IOException eek){ } } } 
```
Questions and Suggestions
- Q: Should FeatureReader provide access to the AttributeReaders it uses?
  A: No, it looks like we will make a lazy Feature in order to cleanly allow for lazy parsing of attribtues.
- Q:FeatureReader has a close method, but no open method?
  A: This is by design allowing FeatureReader to encapsulate its InputStream or Rowset). Please assume that FeatureReaders are a single use proposition.
- Q: All that exception handling is a pain! A: Yes it is, we have constructed semi-normal Java iterators to cut down on the pain. But you *do* still have to close 'em - this is IO after all.
- Q: Can we include skip(int) - SeanG A: The order of the contents is not "known" or predicatable to the end user, so skip( int ) would be useless. For random access (a higher order of abstraction then FeatureReader) please look at FeatureList.
@author Ian Schneider @author Sean Geoghegan, Defence Science and Technology Organisation. @source $URL$ @version $Id$

Examples of org.geotools.data.FeatureReader

      
      String[] ps = new String []{"wkb_geometry","polyid"};
      Query q = new DefaultQuery("pip",cf,ps);         
       
         
      FeatureReader fr = ds.getFeatureReader(q, new DefaultTransaction() );
   
        while (fr.hasNext())
        {
          Feature f= fr.next();
          
          BigDecimal polyidBD = (BigDecimal) f.getAttribute(1);
          Long polyid = new Long(polyidBD.longValue());
          
          if (polyid == null)
            throw new Exception("PIP  has null polyid");
          
          Geometry g = (Geometry) f.getAttribute(0);
          g.setUserData(polyid);
          
          PIP.insert(g.getEnvelopeInternal(),g);
        }
        fr.close();
  }

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Examples of org.geotools.data.FeatureReader

        ods.getSchema(ods.getTypeNames()[0]);
        long end = System.currentTimeMillis();
        System.out.println("OGR schema: " + (end - start) / 1000.0);
        DefaultQuery query = new DefaultQuery(ods.getTypeNames()[0]);
        start = System.currentTimeMillis();
        FeatureReader ofr = ods.getFeatureReader(query, Transaction.AUTO_COMMIT);
        while (ofr.hasNext())
            ofr.next();
        ofr.close();
        end = System.currentTimeMillis();
        System.out.println("OGR: " + (end - start) / 1000.0);
    }

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Examples of org.geotools.data.FeatureReader

        long end = System.currentTimeMillis();
        System.out.println("SDS schema: " + (end - start) / 1000.0);


        DefaultQuery query = new DefaultQuery(sds.getTypeNames()[0]);
        start = System.currentTimeMillis();
        FeatureReader sfr = sds.getFeatureReader(query, Transaction.AUTO_COMMIT);
        while (sfr.hasNext())
            sfr.next();
        sfr.close();
        end = System.currentTimeMillis();
        System.out.println("SDS: " + (end - start) / 1000.0);


        System.out.println("Attribute count: " + sds.getSchema().getAttributeCount());
        System.out.println("Feature count: "

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Examples of org.geotools.data.FeatureReader

        return (SimpleFeature) reader.next();
    }


    public void close() throws IOException {
        
        FeatureReader r = reader;
        while( r instanceof DelegatingFeatureReader ) {
            if ( r instanceof JDBCFeatureReader ) {
                break;
            }

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Examples of org.geotools.data.FeatureReader

            return;
        }


        Query q = new Query(tname("geopoint"));


        FeatureReader r = dataStore.getFeatureReader(q, Transaction.AUTO_COMMIT);
        assertTrue(r.hasNext());
        while (r.hasNext()) {
            SimpleFeature f = (SimpleFeature) r.next();
            assertTrue(f.getAttribute(aname("geo")) instanceof Point);
        }
        r.close();
    }

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Examples of org.geotools.data.FeatureReader

        FilterFactory ff = CommonFactoryFinder.getFilterFactory(null);
        BBOX bbox = ff.bbox("", -200, -200, 200, 200, "EPSG:4326");
        // should select everything without bombing out
        Query q = new Query(tname("geopoint"));
        q.setFilter(bbox);
        FeatureReader r = dataStore.getFeatureReader(q, Transaction.AUTO_COMMIT);
        assertTrue(r.hasNext());
        while (r.hasNext()) {
            SimpleFeature f = (SimpleFeature) r.next();
            assertTrue(f.getAttribute(aname("geo")) instanceof Point);
        }
        r.close();
    }

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Examples of org.geotools.data.FeatureReader

        FilterFactory ff = CommonFactoryFinder.getFilterFactory(null);
        BBOX bbox = ff.bbox("", -300, -40, -200, 40, "EPSG:4326");
        // should select everything without bombing out
        Query q = new Query(tname("geopoint"));
        q.setFilter(bbox);
        FeatureReader r = dataStore.getFeatureReader(q, Transaction.AUTO_COMMIT);
        assertFalse(r.hasNext());
        r.close();
    }

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Examples of org.geotools.data.FeatureReader

        FilterFactory ff = CommonFactoryFinder.getFilterFactory(null);
        BBOX bbox = ff.bbox("", -140, -50, 140, 50, "EPSG:4326");
        // should select everything without bombing out
        Query q = new Query(tname("geopoint"));
        q.setFilter(bbox);
        FeatureReader r = dataStore.getFeatureReader(q, Transaction.AUTO_COMMIT);
        assertTrue(r.hasNext());
        while (r.hasNext()) {
            SimpleFeature f = (SimpleFeature) r.next();
            assertTrue(f.getAttribute(aname("geo")) instanceof Point);
        }
        r.close();
    }

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Examples of org.geotools.data.FeatureReader

            f.setDefaultGeometry(p);
            fw.write();
        }
        fw.close();


        FeatureReader fr = dataStore.getFeatureReader(new Query(tname("geopoint")),
                Transaction.AUTO_COMMIT);
        while (fr.hasNext()) {
            SimpleFeature f = (SimpleFeature) fr.next();
            assertEquals(p, f.getDefaultGeometry());
        }
        fr.close();
    }

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Examples of org.geotools.data.FeatureReader

        fw.close();


        Filter filter = ff.equals(ff.property("name"), ff.literal("append"));
        Query q = new Query(tname("geopoint"), filter);


        FeatureReader fr = dataStore.getFeatureReader(q, Transaction.AUTO_COMMIT);
        assertTrue(fr.hasNext());
        f = (SimpleFeature) fr.next();
        assertEquals(point, f.getDefaultGeometry());
        fr.close();
    }

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Examples of FeatureReader

Questions and Suggestions

Examples of org.geotools.data.FeatureReader

Examples of org.geotools.data.FeatureReader

Examples of org.geotools.data.FeatureReader

Examples of org.geotools.data.FeatureReader

Examples of org.geotools.data.FeatureReader

Examples of org.geotools.data.FeatureReader

Examples of org.geotools.data.FeatureReader

Examples of org.geotools.data.FeatureReader

Examples of org.geotools.data.FeatureReader

Examples of org.geotools.data.FeatureReader