001package org.hl7.fhir.utilities;
002
003/*
004  Copyright (c) 2011+, HL7, Inc.
005  All rights reserved.
006  
007  Redistribution and use in source and binary forms, with or without modification, 
008  are permitted provided that the following conditions are met:
009    
010   * Redistributions of source code must retain the above copyright notice, this 
011     list of conditions and the following disclaimer.
012   * Redistributions in binary form must reproduce the above copyright notice, 
013     this list of conditions and the following disclaimer in the documentation 
014     and/or other materials provided with the distribution.
015   * Neither the name of HL7 nor the names of its contributors may be used to 
016     endorse or promote products derived from this software without specific 
017     prior written permission.
018  
019  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 
020  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
021  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
022  IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
023  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
024  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
025  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
026  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
027  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
028  POSSIBILITY OF SUCH DAMAGE.
029  
030 */
031
032
033
034import java.util.Map.Entry;
035
036import com.google.gson.JsonElement;
037import com.google.gson.JsonObject;
038import com.google.gson.JsonPrimitive;
039
040public class JsonMerger {
041
042
043  public void merge(JsonObject dest, JsonObject source) {
044    for (Entry<String, JsonElement> e : source.entrySet()) {
045      if (dest.has(e.getKey())) {
046        if (e.getValue() instanceof JsonObject && dest.get(e.getKey()) instanceof JsonObject) 
047          merge((JsonObject) dest.get(e.getKey()), (JsonObject) e.getValue());
048        else if (e.getValue() instanceof JsonPrimitive && dest.get(e.getKey()) instanceof JsonPrimitive) {
049          dest.remove(e.getKey());
050          dest.add(e.getKey(), e.getValue());
051        } else
052          throw new Error("Not supported yet?");
053      } else 
054        dest.add(e.getKey(), e.getValue());
055    }
056    
057  }
058
059}