001package org.hl7.fhir.utilities;
002
003/*-
004 * #%L
005 * org.hl7.fhir.utilities
006 * %%
007 * Copyright (C) 2014 - 2019 Health Level 7
008 * %%
009 * Licensed under the Apache License, Version 2.0 (the "License");
010 * you may not use this file except in compliance with the License.
011 * You may obtain a copy of the License at
012 * 
013 *      http://www.apache.org/licenses/LICENSE-2.0
014 * 
015 * Unless required by applicable law or agreed to in writing, software
016 * distributed under the License is distributed on an "AS IS" BASIS,
017 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
018 * See the License for the specific language governing permissions and
019 * limitations under the License.
020 * #L%
021 */
022
023
024import java.util.Map.Entry;
025
026import com.google.gson.JsonElement;
027import com.google.gson.JsonObject;
028import com.google.gson.JsonPrimitive;
029
030public class JsonMerger {
031
032
033  public void merge(JsonObject dest, JsonObject source) {
034    for (Entry<String, JsonElement> e : source.entrySet()) {
035      if (dest.has(e.getKey())) {
036        if (e.getValue() instanceof JsonObject && dest.get(e.getKey()) instanceof JsonObject) 
037          merge((JsonObject) dest.get(e.getKey()), (JsonObject) e.getValue());
038        else if (e.getValue() instanceof JsonPrimitive && dest.get(e.getKey()) instanceof JsonPrimitive) {
039          dest.remove(e.getKey());
040          dest.add(e.getKey(), e.getValue());
041        } else
042          throw new Error("Not supported yet?");
043      } else 
044        dest.add(e.getKey(), e.getValue());
045    }
046    
047  }
048
049}