com.baasbox.service.query.JsonTree.java Source code

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Here is the source code for com.baasbox.service.query.JsonTree.java

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/*
 * 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());
        }

    }

}