| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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.apache.unomi.persistence.spi; |
| |
| import com.fasterxml.jackson.core.JsonParser; |
| import com.fasterxml.jackson.core.ObjectCodec; |
| import com.fasterxml.jackson.databind.DeserializationContext; |
| import com.fasterxml.jackson.databind.deser.std.StdDeserializer; |
| import com.fasterxml.jackson.databind.node.ObjectNode; |
| import org.apache.unomi.api.CustomItem; |
| import org.apache.unomi.api.Item; |
| |
| import java.io.IOException; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| public class ItemDeserializer extends StdDeserializer<Item> { |
| |
| private static final long serialVersionUID = -7040054009670771266L; |
| private Map<String,Class<? extends Item>> classes = new HashMap<>(); |
| |
| public ItemDeserializer() { |
| super(Item.class); |
| } |
| |
| public void registerMapping(String type, Class<? extends Item> clazz) { |
| classes.put(type, clazz); |
| } |
| |
| @Override |
| public Item deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException { |
| ObjectCodec codec = jp.getCodec(); |
| ObjectNode treeNode = codec.readTree(jp); |
| String type = treeNode.get("itemType").textValue(); |
| Class<? extends Item> objectClass = classes.get(type); |
| if (objectClass == null) { |
| objectClass = CustomItem.class; |
| } else { |
| treeNode.remove("itemType"); |
| } |
| Item item = codec.treeToValue(treeNode, objectClass); |
| item.setItemId(treeNode.get("itemId").asText()); |
| return item; |
| } |
| } |