| 1 | /** |
| 2 | * Licensed to jclouds, Inc. (jclouds) under one or more |
| 3 | * contributor license agreements. See the NOTICE file |
| 4 | * distributed with this work for additional information |
| 5 | * regarding copyright ownership. jclouds licenses this file |
| 6 | * to you under the Apache License, Version 2.0 (the |
| 7 | * "License"); you may not use this file except in compliance |
| 8 | * with the License. You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, |
| 13 | * software distributed under the License is distributed on an |
| 14 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| 15 | * KIND, either express or implied. See the License for the |
| 16 | * specific language governing permissions and limitations |
| 17 | * under the License. |
| 18 | */ |
| 19 | package org.jclouds.json.internal; |
| 20 | |
| 21 | import java.lang.reflect.Field; |
| 22 | import java.util.Map; |
| 23 | |
| 24 | import com.google.common.base.Function; |
| 25 | import com.google.gson.JsonElement; |
| 26 | import com.google.gson.JsonObject; |
| 27 | |
| 28 | /** |
| 29 | * Exposes the JsonObject as a map so that we can use gauva apis on it. |
| 30 | * http://code.google.com/p/google-gson/issues/detail?id=325 |
| 31 | * @author Adrian Cole |
| 32 | */ |
| 33 | public enum JsonObjectAsMap implements Function<JsonObject, Map<String, JsonElement>> { |
| 34 | INSTANCE; |
| 35 | |
| 36 | private final Field members; |
| 37 | |
| 38 | JsonObjectAsMap() { |
| 39 | try { |
| 40 | members = JsonObject.class.getDeclaredField("members"); |
| 41 | members.setAccessible(true); |
| 42 | } catch (NoSuchFieldException e) { |
| 43 | throw new UnsupportedOperationException("cannot access gson internals", e); |
| 44 | } |
| 45 | } |
| 46 | |
| 47 | @SuppressWarnings("unchecked") |
| 48 | @Override |
| 49 | public Map<String, JsonElement> apply(JsonObject in) { |
| 50 | try { |
| 51 | return (Map<String, JsonElement>) members.get(in); |
| 52 | } catch (IllegalArgumentException e) { |
| 53 | throw new UnsupportedOperationException("cannot access gson internals", e); |
| 54 | } catch (IllegalAccessException e) { |
| 55 | throw new UnsupportedOperationException("cannot access gson internals", e); |
| 56 | } |
| 57 | } |
| 58 | } |