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Diffstat (limited to 'src/org/traccar/geocoder/JsonReverseGeocoder.java')
-rw-r--r--src/org/traccar/geocoder/JsonReverseGeocoder.java89
1 files changed, 89 insertions, 0 deletions
diff --git a/src/org/traccar/geocoder/JsonReverseGeocoder.java b/src/org/traccar/geocoder/JsonReverseGeocoder.java
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+++ b/src/org/traccar/geocoder/JsonReverseGeocoder.java
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+/*
+ * Copyright 2015 Anton Tananaev (anton@traccar.org)
+ *
+ * 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 org.traccar.geocoder;
+
+import com.ning.http.client.AsyncCompletionHandler;
+import com.ning.http.client.Response;
+import org.traccar.Context;
+
+import javax.json.Json;
+import javax.json.JsonObject;
+import javax.json.JsonReader;
+import java.util.AbstractMap;
+import java.util.Collections;
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+public abstract class JsonReverseGeocoder implements ReverseGeocoder {
+
+ private final String url;
+
+ private Map<Map.Entry<Double, Double>, String> cache;
+
+ public JsonReverseGeocoder(String url, final int cacheSize) {
+ this.url = url;
+ if (cacheSize > 0) {
+ this.cache = Collections.synchronizedMap(new LinkedHashMap<Map.Entry<Double, Double>, String>() {
+ @Override
+ protected boolean removeEldestEntry(Map.Entry eldest) {
+ return size() > cacheSize;
+ }
+ });
+ }
+ }
+
+ @Override
+ public void getAddress(
+ final AddressFormat format, final double latitude,
+ final double longitude, final ReverseGeocoderCallback callback) {
+
+ if (cache != null) {
+ String cachedAddress = cache.get(new AbstractMap.SimpleImmutableEntry<>(latitude, longitude));
+ if (cachedAddress != null) {
+ callback.onSuccess(cachedAddress);
+ return;
+ }
+ }
+
+ Context.getAsyncHttpClient().prepareGet(String.format(url, latitude, longitude))
+ .execute(new AsyncCompletionHandler() {
+ @Override
+ public Object onCompleted(Response response) throws Exception {
+ try (JsonReader reader = Json.createReader(response.getResponseBodyAsStream())) {
+ Address address = parseAddress(reader.readObject());
+ if (address != null) {
+ String formattedAddress = format.format(address);
+ if (cache != null) {
+ cache.put(new AbstractMap.SimpleImmutableEntry<>(latitude, longitude), formattedAddress);
+ }
+ callback.onSuccess(formattedAddress);
+ } else {
+ callback.onFailure(new IllegalArgumentException("Empty address"));
+ }
+ }
+ return null;
+ }
+
+ @Override
+ public void onThrowable(Throwable t) {
+ callback.onFailure(t);
+ }
+ });
+ }
+
+ public abstract Address parseAddress(JsonObject json);
+
+}