Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Open Source License 

import java.io.IOException;

import java.util.*;

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

import com.fasterxml.jackson.databind.DeserializationFeature;

public class Main {
    public static ObjectMapper mapper = new ObjectMapper() {
        private static final long serialVersionUID = -174113593500315394L;
        {
            configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
        }
    };

    /**
     * JSON Deserialization of the given json string.
     * @param   json   The json string to deserialize
     * @param   <T>   The type of the object to deserialize into
     * @return   The deserialized object */
    public static <T extends Object> T deserialize(String json, TypeReference<T> typeReference) throws IOException {
        if (isNullOrWhiteSpace(json))
            return null;

        return mapper.readValue(json, typeReference);
    }

    /**
     * JSON Deserialization of the given json string.
     * @param   jParser The json parser for reading json to deserialize
     * @param   <T>   The type of the object to deserialize into
     * @return   The deserialized object */
    public static <T extends Object> T deserialize(JsonParser jParser, Class<T> typeReference) throws IOException {
        if ((null == jParser) || (jParser.isClosed()))
            return null;

        return mapper.readValue(jParser, typeReference);
    }

    /**
     * JSON Deserialization of the given json string.
     * @param   json   The json string to deserialize
     * @return   The deserialized json as a Map */
    public static LinkedHashMap<String, Object> deserialize(String json) throws IOException {
        if (isNullOrWhiteSpace(json))
            return null;

        TypeReference<LinkedHashMap<String, Object>> typeRef = new TypeReference<LinkedHashMap<String, Object>>() {
        };
        return deserialize(json, typeRef);
    }

    /**
     * Validates if the string is null, empty or whitespace
     * @param   s   The string to validate
     * @return   The result of validation */
    public static boolean isNullOrWhiteSpace(String s) {
        if (s == null)
            return true;

        int length = s.length();
        if (length > 0) {
            for (int start = 0, middle = length / 2, end = length - 1; start <= middle; start++, end--) {
                if (s.charAt(start) > ' ' || s.charAt(end) > ' ') {
                    return false;
                }
            }
            return true;
        }
        return false;
    }
}