/*
* Copyright (c) 2014.
*
* BaasBox - info-at-baasbox.com
*
* Licensed 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 com.baasbox.service.query;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.node.ArrayNode;
import com.fasterxml.jackson.databind.node.ObjectNode;
import com.baasbox.service.query.PartsLexer.Part;
public class JsonTree {
public static JsonNode read(JsonNode json,PartsParser pp){
JsonNode root = json;
for (Part p : pp.parts()) {
if(p instanceof PartsLexer.ArrayField){
int index = ((PartsLexer.ArrayField)p).arrayIndex;
root = root.path(p.getName()).path(index);
} else if(p instanceof PartsLexer.Field){
root = root.path(p.getName());
}
}
return root;
}
public static JsonNode write(JsonNode json,PartsParser pp,JsonNode data) throws MissingNodeException{
JsonNode root =json;
for (Part p : pp.parts()) {
if(p.equals(pp.last())){
break;
}
if(p instanceof PartsLexer.ArrayField){
int index = ((PartsLexer.ArrayField)p).arrayIndex;
root = root.path(p.getName()).path(index);
} else if(p instanceof PartsLexer.Field){
root = root.path(p.getName());
}
}
if(root.isMissingNode()){
throw new MissingNodeException(pp.treeFields());
}
Part last = pp.last();
if(last instanceof PartsLexer.ArrayField){
PartsLexer.ArrayField arr = (PartsLexer.ArrayField)last;
int index = arr.arrayIndex;
root = root.path(last.getName());
ArrayNode arrNode = (ArrayNode)root;
if(arrNode.size()<=index){
arrNode.add(data);
}else{
arrNode.set(index, data);
}
return root;
}else{
try{
((ObjectNode)root).put(last.getName(),data);
}catch(Exception e){
throw new MissingNodeException(pp.treeFields());
}
return root.get(last.getName());
}
}
}