/* Copyright 2013 The jeo project. All rights reserved. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package io.jeo.geojson; import java.io.IOException; import java.io.Reader; import io.jeo.json.parser.ParseException; import io.jeo.vector.Feature; import io.jeo.geojson.parser.FeatureCollectionHandler; import io.jeo.geojson.parser.RootHandler; import io.jeo.json.parser.JSONParser; import io.jeo.vector.FeatureCursor; import org.slf4j.Logger; import org.slf4j.LoggerFactory; public class GeoJSONCursor extends FeatureCursor { static Logger LOG = LoggerFactory.getLogger(GeoJSONCursor.class); Reader input; JSONParser parser; RootHandler handler; Feature next; GeoJSONCursor(Reader input) { this.input = input; this.parser = new JSONParser(); this.handler = new RootHandler(new FeatureCollectionHandler()); } @Override public boolean hasNext() throws IOException { while (next == null && !handler.isFinished()) { try { parser.parse(input, handler, true); Object obj = handler.getValue(); if (obj instanceof Feature) { next = (Feature) obj; } } catch (ParseException e) { throw new IOException(e); } } return next != null; } @Override public Feature next() throws IOException { try { return next; } finally { next = null; } } @Override public void close() throws IOException { if (input != null) { input.close(); input = null; } } }