com.pivotal.cf.mobile.ats.json.JsonFunctions.java Source code

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Here is the source code for com.pivotal.cf.mobile.ats.json.JsonFunctions.java

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/*
 * Copyright (c) 2011-2014 GoPivotal, Inc. All Rights Reserved.
 *
 *  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.pivotal.cf.mobile.ats.json;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.databind.module.SimpleModule;

import java.io.IOException;
import java.util.Collection;
import java.util.List;
import java.util.Map;

/**
 * @author Will Tran <wtran@pivotallabs.com>
 */
public class JsonFunctions {

    private static final ObjectMapper mapper;

    static {
        mapper = new ObjectMapper();
        mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
        mapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);

        SimpleModule mod = new SimpleModule();
        mod.addSerializer(new UndefinedSerializer());
        mod.addSerializer(new ScriptObjectSerializer());
        mod.addSerializer(new ScriptObjectMirrorSerializer());
        mapper.registerModule(mod);
    }

    public static ObjectMapper getObjectMapper() {
        return mapper;
    }

    public static Object parse(String json) throws IOException {
        return convert(mapper.readValue(json, Object.class));
    }

    // recursively replace Collections and Maps with native JavaScript arrays and objects.
    public static Object convert(Object o) {
        if (o instanceof Collection<?>) {
            List<?> original = (List<?>) o;
            Object[] array = original.toArray();
            for (int i = 0; i < array.length; i++) {
                array[i] = convert(array[i]);
            }
            return jdk.nashorn.internal.objects.Global.allocate(array);
        } else if (o instanceof Map<?, ?>) {
            jdk.nashorn.internal.scripts.JO jo = new jdk.nashorn.internal.scripts.JO(
                    jdk.nashorn.internal.runtime.PropertyMap.newMap());
            ((Map<?, ?>) o).forEach((k, v) -> jo.put(k, convert(v), false));
            return jo;
        } else {
            return o;
        }
    }

    public static String stringify(Object obj) throws JsonProcessingException {
        return mapper.writeValueAsString(obj);
    }

}