| 1 | /** |
| 2 | * |
| 3 | * Copyright (C) 2011 Cloud Conscious, LLC. <info@cloudconscious.com> |
| 4 | * |
| 5 | * ==================================================================== |
| 6 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 7 | * you may not use this file except in compliance with the License. |
| 8 | * 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, software |
| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 15 | * See the License for the specific language governing permissions and |
| 16 | * limitations under the License. |
| 17 | * ==================================================================== |
| 18 | */ |
| 19 | package org.jclouds.json.internal; |
| 20 | |
| 21 | import com.google.common.base.Function; |
| 22 | import com.google.common.collect.Iterables; |
| 23 | import com.google.common.collect.Lists; |
| 24 | import com.google.common.collect.Maps; |
| 25 | import com.google.gson.JsonElement; |
| 26 | import com.google.gson.JsonPrimitive; |
| 27 | |
| 28 | /** |
| 29 | * This is a class that helps the default {@link MapTypeAdapter} make a sane object graph when the |
| 30 | * value is set to {@code Object} |
| 31 | * http://code.google.com/p/google-gson/issues/detail?id=325 |
| 32 | * @author Adrian Cole |
| 33 | */ |
| 34 | public enum ParseObjectFromElement implements Function<JsonElement, Object> { |
| 35 | SINGLETON; |
| 36 | public Object apply(JsonElement input) { |
| 37 | Object value = null; |
| 38 | if (input == null || input.isJsonNull()) { |
| 39 | value = null; |
| 40 | } else if (input.isJsonPrimitive()) { |
| 41 | JsonPrimitive primitive = input.getAsJsonPrimitive(); |
| 42 | if (primitive.isNumber()) { |
| 43 | value = primitive.getAsNumber(); |
| 44 | } else if (primitive.isBoolean()) { |
| 45 | value = primitive.getAsBoolean(); |
| 46 | } else { |
| 47 | value = primitive.getAsString(); |
| 48 | } |
| 49 | } else if (input.isJsonArray()) { |
| 50 | value = Lists.newArrayList(Iterables.transform(input.getAsJsonArray(), this)); |
| 51 | } else if (input.isJsonObject()) { |
| 52 | value = Maps.<String,Object>newLinkedHashMap(Maps.transformValues(JsonObjectAsMap.INSTANCE.apply(input.getAsJsonObject()), |
| 53 | this)); |
| 54 | } |
| 55 | return value; |
| 56 | } |
| 57 | } |