cloudfoundry.norouter.f5.Json.java Source code

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Here is the source code for cloudfoundry.norouter.f5.Json.java

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/*
 * Copyright (c) 2015 Intellectual Reserve, 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 cloudfoundry.norouter.f5;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;

import java.io.IOException;
import java.util.Optional;

/**
 * @author Mike Heath
 */
class Json {

    private static final ObjectMapper mapper = new ObjectMapper().findAndRegisterModules()
            .configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);

    public static <T> T fromJson(Class<T> type, String json) throws IOException {
        return mapper.reader(type).readValue(json);
    }

    public static String toJson(Object object) {
        try {
            return mapper.writeValueAsString(object);
        } catch (JsonProcessingException e) {
            throw new IllegalArgumentException(e);
        }
    }

    /**
     * The iControl REST API seems to filter out escaped double quotes so instead of using pure JSON, we use JSON
     * that replaces the double quote with a tick (`).
     *
     * @param object the object to JSONishify
     * @return JSON where the the double quote (") has been replaced with a tick (`).
     */
    public static String toJsonish(Object object) {
        return escape(toJson(object));
    }

    public static <T> Optional<T> fromJsonish(Class<T> type, String jsonish) {
        if (jsonish == null || jsonish.trim().length() == 0) {
            return Optional.empty();
        }
        try {
            return Optional.of(fromJson(type, unescape(jsonish)));
        } catch (IOException e) {
            return Optional.empty();
        }
    }

    public static String escape(String json) {
        return json.replaceAll("\"", "`");
    }

    public static String unescape(String jsonish) {
        return jsonish.replaceAll("`", "\"");
    }
}