/* 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.vector; import com.vividsolutions.jts.geom.Geometry; import java.util.HashMap; import java.util.Map; /** * Feature wrapper that tracks changes to an underlying Feature object. * * @author Justin Deoliveira, OpenGeo */ public class DiffFeature extends FeatureWrapper { Map<String,Object> changed; public DiffFeature(Feature feature) { super(feature); changed = new HashMap<>(); } /** * The diff map. */ public Map<String, Object> changed() { return changed; } /** * Applies the changes made to the underlying feature. */ public void apply() { for (Map.Entry<String, Object> e: changed.entrySet()) { delegate.put(e.getKey(), e.getValue()); } changed.clear(); } public Object get(String key) { if (changed.containsKey(key)) { return changed.get(key); } return delegate.get(key); } public Feature put(String key, Object val) { changed.put(key, val); return this; } @Override public Feature put(Geometry g) { for (Map.Entry<String,Object> e : delegate.map().entrySet()) { if (e.getValue() instanceof Geometry) { changed.put(e.getKey(), g); } } return this; } }