com.amdocs.zusammen.utils.fileutils.json.JsonUtil.java Source code

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Here is the source code for com.amdocs.zusammen.utils.fileutils.json.JsonUtil.java

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/*
 * Copyright  2016-2017 European Support Limited
 *
 * 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.amdocs.zusammen.utils.fileutils.json;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonIOException;
import com.google.gson.JsonParser;
import com.google.gson.JsonSyntaxException;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.StringReader;
import java.lang.reflect.Type;
import java.util.Map;
import java.util.Objects;

public class JsonUtil {

    public static String object2Json(Object obj) {
        return new GsonBuilder().setPrettyPrinting().create().toJson(obj);
    }

    public static <T> T json2Object(String json, Class<T> classOfT) {
        return json2Object(json, (Type) classOfT);
    }

    public static <T> T json2Object(String json, Type typeOfT) {
        T t;
        try {
            try (Reader br = new StringReader(json)) {
                t = new Gson().fromJson(br, typeOfT);
            } catch (IOException e) {
                throw e;
            }
        } catch (JsonIOException | JsonSyntaxException | IOException e) {
            throw new RuntimeException(e);
        }
        return t;
    }

    public static String inputStream2Json(InputStream is) {
        if (Objects.isNull(is)) {
            throw new RuntimeException("Input object is null");
        }
        Map mapObject = json2Object(is, Map.class);
        return object2Json(mapObject);
    }

    public static <T> T json2Object(InputStream is, Class<T> classOfT) {
        return json2Object(is, (Type) classOfT);
    }

    public static <T> T json2Object(InputStream is, Type typeOfT) {
        T t;
        try {
            try (Reader br = new BufferedReader(new InputStreamReader(is))) {
                t = new Gson().fromJson(br, typeOfT);
            } catch (IOException e) {
                throw e;
            }
        } catch (JsonIOException | JsonSyntaxException | IOException e) {
            throw new RuntimeException(e);
        } finally {
            if (is != null) {
                try {
                    is.close();
                } catch (IOException ignore) {
                }
            }
        }
        return t;
    }

    //todo check https://github.com/stleary/JSON-java as replacement for this code
    public static boolean isValidJson(String json) {
        try {
            return new JsonParser().parse(json).isJsonObject();
        } catch (JsonSyntaxException jse) {
            return false;
        }
    }

}