com.turn.splicer.tsdbutils.JSON.java Source code

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Here is the source code for com.turn.splicer.tsdbutils.JSON.java

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/**
 * Copyright 2015-2016 The Splicer Query Engine Authors
 *
 * 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.turn.splicer.tsdbutils;

import java.io.IOException;

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.common.base.Preconditions;
import net.opentsdb.utils.JSONException;

public class JSON {

    /**
     * Jackson de/serializer initialized, configured and shared
     */
    private static final ObjectMapper jsonMapper = new ObjectMapper();

    static {
        // allows parsing NAN and such without throwing an exception. This is
        // important
        // for incoming data points with multiple points per put so that we can
        // toss only the bad ones but keep the good
        jsonMapper.configure(JsonParser.Feature.ALLOW_NON_NUMERIC_NUMBERS, true);
    }

    public static <T> T parseToObject(final String json, final Class<T> pojo) {
        Preconditions.checkNotNull(json);
        Preconditions.checkArgument(!json.isEmpty(), "Incoming data was null or empty");
        Preconditions.checkNotNull(pojo);

        try {
            return jsonMapper.readValue(json, pojo);
        } catch (IOException e) {
            throw new JSONException(e);
        }
    }

    /**
     * Serializes the given object to a JSON string
     *
     * @param object The object to serialize
     * @return A JSON formatted string
     * @throws IllegalArgumentException if the object was null
     * @throws JSONException            if the object could not be serialized
     * @throws IOException              Thrown when there was an issue reading the object
     */
    public static String serializeToString(Object object) {
        if (object == null)
            throw new IllegalArgumentException("Object was null");
        try {
            return jsonMapper.writeValueAsString(object);
        } catch (JsonProcessingException e) {
            throw new JSONException(e);
        }
    }

    /**
     * Serializes the given object to a JSON byte array
     *
     * @param object The object to serialize
     * @return A JSON formatted byte array
     * @throws IllegalArgumentException if the object was null
     * @throws JSONException            if the object could not be serialized
     * @throws IOException              Thrown when there was an issue reading the object
     */
    public static byte[] serializeToBytes(Object object) {
        if (object == null)
            throw new IllegalArgumentException("Object was null");
        try {
            return jsonMapper.writeValueAsBytes(object);
        } catch (JsonProcessingException e) {
            throw new JSONException(e);
        }
    }
}