/*
 * Copyright 2016 E-System LLC
 *
 *    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.es.lib.common;

import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;

import java.io.IOException;
import java.io.Reader;

/**
 * @author Zuzoev Dmitry - zuzoev.d@ext-system.com
 * @since 10.04.15
 */
public final class JsonUtil {

    private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();

    static {
        OBJECT_MAPPER.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
    }

    private JsonUtil() { }

    public static <T> T fromJson(String json, Class<T> classOfT) {
        try {
            return OBJECT_MAPPER.readValue(json, classOfT);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    public static <T> T fromJson(Reader reader, Class<T> classOfT) {
        try {
            return OBJECT_MAPPER.readValue(reader, classOfT);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    public static <T> T fromJson(String json, TypeReference<T> typeReference) {
        try {
            return OBJECT_MAPPER.readValue(json, typeReference);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    public static String toJson(Object object) {
        try {
            return OBJECT_MAPPER.writeValueAsString(object);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }

    }
}

/*
 * Copyright 2016 E-System LLC
 *
 *    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.es.lib.common;

import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;

import java.io.IOException;
import java.io.Reader;

/**
 * @author Zuzoev Dmitry - zuzoev.d@ext-system.com
 * @since 10.04.15
 */
public final class JsonUtil {

    private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper()
        .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);

    private JsonUtil() { }

    public static <T> T fromJson(String json, Class<T> classOfT) {
        try {
            return OBJECT_MAPPER.readValue(json, classOfT);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    public static <T> T fromJson(Reader reader, Class<T> classOfT) {
        try {
            return OBJECT_MAPPER.readValue(reader, classOfT);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    public static <T> T fromJson(String json, TypeReference<T> typeReference) {
        try {
            return OBJECT_MAPPER.readValue(json, typeReference);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    public static String toJson(Object object) {
        try {
            return OBJECT_MAPPER.writeValueAsString(object);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }

    }
}

Remove static block