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

 */
public abstract class JDBCFeatureReaderTest extends JDBCTestSupport {


    public void testNext() throws Exception {
        Query query = new DefaultQuery(tname("ft1"));
        FeatureReader reader = dataStore.getFeatureReader(query, Transaction.AUTO_COMMIT);


        assertTrue(reader.hasNext());
        SimpleFeature feature = (SimpleFeature) reader.next();


        // feature tests
        // test getName
        assertEquals(feature.getName(), reader.getFeatureType().getName());
        // test getters
        int i = 0;
        for (PropertyDescriptor desc : reader.getFeatureType().getDescriptors()) {
            assertTrue(i < feature.getAttributeCount());
            assertEquals(feature.getAttribute(desc.getName()), feature.getAttribute(i++));
        }
        // test set
        List<Object> attrs = feature.getAttributes();
        try {
            attrs.set(2, 1.1D);
            feature.setAttributes(attrs);
        } catch (Exception e) {
            fail();
        }
        assertEquals(attrs.get(2), feature.getAttribute(2));


        Geometry g = (Geometry) feature.getDefaultGeometry();
        assertNotNull(g);


        assertTrue(g.getUserData() instanceof CoordinateReferenceSystem);
        reader.close();
    }

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Examples of org.geotools.data.FeatureReader

        }


        assertNotNull(key);


        Object keyValue = null;
        FeatureReader r = fs.getReader();
        try {
            assertTrue(r.hasNext());


            SimpleFeature f = (SimpleFeature) r.next();
            keyValue = f.getAttribute(key);
        }
        finally {
            r.close();
        }


        assertNotNull(keyValue);


        FilterFactory ff = CommonFactoryFinder.getFilterFactory();
        Filter filter = ff.equal(ff.property(key), ff.literal(keyValue), false);


        assertEquals(1, fs.getCount(new Query(tname("nonfirst"), filter)));


        try {
            fs.modifyFeatures(key, 10, filter);
            fail("expected exception");
        }
        catch(IllegalArgumentException e) {
        }


        fs.modifyFeatures(new String[]{aname("name"), key, aname("geom")}, new Object[]{"foo", 10, null}, filter);


        try {
            r = fs.getReader(ff.equal(ff.property(key), ff.literal(keyValue), true));
            assertTrue(r.hasNext());


            SimpleFeature f = (SimpleFeature) r.next();
            assertEquals("foo", f.getAttribute(aname("name")));
        }
        finally {
            r.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

        OGRDataStore ods = new OGRDataStore(getAbsolutePath(STATE_POP), null, null, ogr);


        assertFeatureTypeEquals(sds.getSchema(), ods.getSchema(sds.getSchema().getTypeName()));


        Query query = new Query(sds.getSchema().getTypeName());
        FeatureReader sfr = sds.getFeatureReader(query, Transaction.AUTO_COMMIT);
        FeatureReader ofr = ods.getFeatureReader(query, Transaction.AUTO_COMMIT);
        SimpleFeature sf = null;
        SimpleFeature of = null;
        while (true) {
            if (!sfr.hasNext()) {
                assertTrue(!ofr.hasNext());
                break;
            }
            sf = (SimpleFeature) sfr.next();
            of = (SimpleFeature) ofr.next();
            for (int i = 0; i < sds.getSchema().getAttributeCount(); i++) {
                Object shapeAtt = sf.getAttribute(i);
                Object ogrAtt = of.getAttribute(i);
                assertEquals(shapeAtt, ogrAtt);
            }
        }
        sfr.close();
        ofr.close();
        sds.dispose();
        ods.dispose();
    }

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Examples of org.geotools.data.FeatureReader

            f.setAttributes(features[i].getAttributes());
            writer.write();
        }
        writer.close();


        FeatureReader reader = ds.getFeatureReader(new Query("testw"), null);
        for (int i = 0; i < features.length; i++) {
            assertTrue(reader.hasNext());
            SimpleFeature f = (SimpleFeature) reader.next();
            for (int j = 0; j < schema.getAttributeCount(); j++) {
                if (f.getAttribute(j) instanceof Geometry) {
                    // this is necessary because geometry equality is
                    // implemented as Geometry.equals(Geometry)
                    Geometry a = (Geometry) f.getAttribute(j);
                    Geometry b = (Geometry) features[i].getAttribute(j);
                    assertTrue(a.equals(b));
                } else {
                    assertEquals(f.getAttribute(j), features[i].getAttribute(j));
                }
            }
        }
        assertFalse(reader.hasNext());
        reader.close();
    }

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Examples of org.geotools.data.FeatureReader

        assertEquals("twenty", f.getAttribute("baz"));
        r.close();
    }
    
    public void testGetFeatureReader() throws Exception {
        FeatureReader r = dataStore.getFeatureReader(new Query("bar"), Transaction.AUTO_COMMIT);
        assertNotNull(r);
        
        assertTrue(r.hasNext());
    }

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Examples of org.geotools.data.FeatureReader

        return dataStore;
    }


    @Override
    public FeatureReader read(ImportData data, ImportTask task) throws IOException {
        FeatureReader reader = getDataStore(data, task).getFeatureReader(
            new Query(task.getOriginalLayerName()), Transaction.AUTO_COMMIT);
        return reader;
    }

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Examples of org.geotools.data.FeatureReader

            (SimpleFeatureType) item.getMetadata().get(FeatureType.class);
        FeatureJSON json = new FeatureJSON();
        json.setFeatureType(featureType);
        final FeatureIterator it = json.streamFeatureCollection(file(data, item));


        return new FeatureReader() {


            @Override
            public FeatureType getFeatureType() {
                return featureType;
            }

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Examples of org.geotools.data.FeatureReader

        assertEquals("twenty", f.getAttribute("baz"));
        r.close();
    }
    
    public void testGetFeatureReader() throws Exception {
        FeatureReader r = dataStore.getFeatureReader(new Query("bar"), Transaction.AUTO_COMMIT);
        assertNotNull(r);
        
        assertTrue(r.hasNext());
    }

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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