Examples of org.geotools.data.simple.SimpleFeatureIterator

org.geotools.data.simple.SimpleFeatureIterator
Streaming access to simple features, required to {@link #close()} after use.
This is an explicit interface for FeatureIterator.
Sample use:
```
 SimpleFeatureIterator i = featureCollection.features() try { while( i.hasNext() ){ SimpleFeature feature = i.next(); } } finally { i.close(); } 
```
@author Jody Garnett @source $URL$

              
              FileDataStore store = FileDataStoreFinder.getDataStore(shapeFile);
              SimpleFeatureSource featureSource = store.getFeatureSource();
              
              SimpleFeatureCollection featureCollection = featureSource.getFeatures();
              SimpleFeatureIterator featureIterator = featureCollection.features();
              
              List<AttributeDescriptor> attributeDescriptors = featureSource.getSchema().getAttributeDescriptors();
              
              // update field listing
              Long position = new Long(0);
              
              for(AttributeDescriptor attribute : attributeDescriptors)
              {
                GisUploadField field = new GisUploadField();
                field.fieldName = attribute.getName().toString();
                field.fieldType = attribute.getType().getName().getLocalPart();
                field.fieldPosition = position;
                
                field.gisUpload = gisUpload;
                
                field.save();
           
                position++;
              }
              
                
              CoordinateReferenceSystem dataCRS = featureSource.getSchema().getCoordinateReferenceSystem();
             
              String code = "EPSG:4326";
              CRSAuthorityFactory crsAuthorityFactory = CRS.getAuthorityFactory(true);
              CoordinateReferenceSystem mapCRS = crsAuthorityFactory.createCoordinateReferenceSystem(code);
                
                
              boolean lenient = true; // allow for some error due to different datums
              MathTransform transform = CRS.findMathTransform(dataCRS, mapCRS, lenient);
              
              while (featureIterator.hasNext()) 
              {
                SimpleFeature feature = featureIterator.next();
    
                GeometryType geomType = feature.getFeatureType().getGeometryDescriptor().getType();
                
                // handle appropriate shape/upload type
                if(gisUpload.type == GisUploadType.ROUTES)

View Full Code Here


    private Geometry unionGeometry( SimpleFeatureCollection featureCollection ) {
        if (featureCollection.size() < 0) return null;


        List<Geometry> geoms = new ArrayList<Geometry>();
        SimpleFeatureIterator featureIterator = featureCollection.features();


        while( featureIterator.hasNext() ) {
            SimpleFeature feature = featureIterator.next();
            Geometry geometry = (Geometry) feature.getDefaultGeometry();
            geoms.add(geometry.reverse());


        }

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    private List<SimpleFeature> featureCollectionToList( SimpleFeatureCollection collection ) {
        List<SimpleFeature> featuresList = new ArrayList<SimpleFeature>();
        if (collection == null) {
            return featuresList;
        }
        SimpleFeatureIterator featureIterator = collection.features();
        while( featureIterator.hasNext() ) {
            SimpleFeature feature = featureIterator.next();
            featuresList.add(feature);
        }
        featureIterator.close();
        return featuresList;
    }

View Full Code Here

            try {
                if (geoResource.canResolve(SimpleFeatureStore.class)) {
                    final SimpleFeatureStore featureSource = geoResource.resolve(SimpleFeatureStore.class,
                            new NullProgressMonitor());
                    final SimpleFeatureCollection featureCollection = featureSource.getFeatures(filter);
                    final SimpleFeatureIterator featureIterator = featureCollection.features();
                    try {
                         if (featureIterator.hasNext()) {
                             return featureIterator.next();
                         }
                    } finally {
                        if (featureIterator != null) {
                            featureIterator.close();
                        }
                    }    
                }
            } catch (IOException e) {
                e.printStackTrace();

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        this.mt=mt;
    }


    public SimpleFeatureIterator features() {
        
        final SimpleFeatureIterator iter = source.features();


        return new SimpleFeatureIterator() {


            private SimpleFeature feature;


            public boolean hasNext() {
                while( feature==null ){
                    if ( !iter.hasNext() )
                        return false;
                    SimpleFeature next = iter.next();
                    if( next==null )
                        continue;
                    Geometry geometry=(Geometry) next.getAttribute(typeToUseAsGeometry.getName());
                    geometry = toCollection(geometry);
                    if (geometry != null) {
                        try {
                            geometry = JTS.transform(geometry, mt);
                        } catch (TransformException e) {
                            throw (RuntimeException) new RuntimeException(
                                    Messages.ReprojectingFeatureCollection_transformationError
                                            + next.getID()).initCause(e);
                        }
                    }
                    feature = new FeatureWrapper(next, schema, new Geometry[]{geometry}, 
                                new String[]{ schema.getGeometryDescriptor().getName().getLocalPart()});
                }
                
                return feature!=null;
            }


            public SimpleFeature next() {
                SimpleFeature tmp = feature;
                feature=null;
                monitor.worked(1);
                return tmp;
            }


            @Override
            public void close() {
                iter.close();
            }
            
        };
    }

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                new SubProgressMonitor(monitor, 1));
        if (featureSource == null) {
            return;
        }
        SimpleFeatureCollection featureCollection = featureSource.getFeatures(selectedLayer.getQuery(true));
        SimpleFeatureIterator featureIterator = featureCollection.features();
        EditCommandFactory cmdFactory = EditCommandFactory.getInstance();
        List<UndoableMapCommand> cmdList = new LinkedList<UndoableMapCommand>();
        count = 0;
        while( featureIterator.hasNext() ) {
            SimpleFeature feature = featureIterator.next();
            Geometry geometry = (Geometry) feature.getDefaultGeometry();
            Geometry newGeometry = geometry.reverse();
            UndoableMapCommand setGeometryCmd = cmdFactory.createSetGeomteryCommand(feature, selectedLayer, newGeometry);
            cmdList.add(setGeometryCmd);
            count++;

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             * @return True if the feature is in the store.
             */
            private boolean isFeatureOnStore( Filter id ) {


                SimpleFeatureCollection collection = null;
                SimpleFeatureIterator iter = null;
                try {
                    collection = layerList.get(0).getResource(SimpleFeatureSource.class, null).getFeatures(id);
                    iter = collection.features();
                    if (iter.hasNext()) {
                        return true;
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                } finally {
                    if(iter != null) iter.close();
                }
                return false;
            }
        });
    }

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                    display,
                    Messages.getString("OperationUtils_warning"), Messages.getString("OperationUtils_nofeaturesproblem"), MSGTYPE.WARNING); //$NON-NLS-1$ //$NON-NLS-2$
            return;
        }


        SimpleFeatureIterator featureIterator = featureCollection.features();
        EditCommandFactory cmdFactory = EditCommandFactory.getInstance();
        List<UndoableMapCommand> copyOverList = new LinkedList<UndoableMapCommand>();
        List<UndoableMapCommand> deleteOldList = new LinkedList<UndoableMapCommand>();
        int count = 0;
        while( featureIterator.hasNext() ) {
            SimpleFeature feature = featureIterator.next();
            UndoableMapCommand addFeatureCmd = cmdFactory.createAddFeatureCommand(feature, toLayer);
            copyOverList.add(addFeatureCmd);
            UndoableMapCommand deleteFeatureCmd = cmdFactory.createDeleteFeature(feature, selectedLayer);
            deleteOldList.add(deleteFeatureCmd);
            count++;

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        this.monitor = monitor;
    }


    @Override
    public SimpleFeatureIterator features() {
        final SimpleFeatureIterator iterator = delegate.features();
        
        if( size == -1 ){
            size = delegate.size();
            monitor.beginTask(delegate.getID(), size );
        }
        return new SimpleFeatureIterator(){
            int index = 0;
            public boolean hasNext() {
                return iterator.hasNext();
            }
            public SimpleFeature next() {
                index++;
                if( index > progress){
                    progress = index;
                    monitor.worked(1);
                }
                return iterator.next();
            }
            public void close() {
                monitor.done();
                iterator.close();                
            }            
        };
    }

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        try {
            if (geoResource.canResolve(SimpleFeatureStore.class)) {
                final SimpleFeatureStore featureSource = geoResource.resolve(
                        SimpleFeatureStore.class, new NullProgressMonitor());
                final SimpleFeatureCollection featureCollection = featureSource.getFeatures(filter);
                final SimpleFeatureIterator featureIterator = featureCollection.features();
                try {
                    if (featureIterator.hasNext()) {
                        return featureIterator.next();
                    }
                } finally {
                    if (featureIterator != null) {
                        featureIterator.close();
                    }
                }
            }
        } catch (IOException e) {
            e.printStackTrace();

View Full Code Here

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