org.ocsoft.olivia.utils.JsonUtils.java Source code

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Here is the source code for org.ocsoft.olivia.utils.JsonUtils.java

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/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.ocsoft.olivia.utils;

import java.io.File;
import java.io.IOException;
import java.util.Map;

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.databind.node.ObjectNode;

/**
 * JSON??.
 * @author tohhy
 */
public class JsonUtils {

    /**
     * mapper?.
     */
    private static final ObjectMapper mapper = new ObjectMapper();

    static {
        mapper.enable(SerializationFeature.INDENT_OUTPUT);
    }

    /**
     * 
     * @param json
     * @return
     * @throws IOException
     */
    public static JsonNode readTree(String json) throws IOException {
        return mapper.readTree(json);
    }

    /**
     * ObjectNode?????.
     * @return ????ObjectNode?
     */
    public static ObjectNode createObjectNode() {
        return mapper.createObjectNode();
    }

    /**
     * ??JSON?????.
     * @param value ??
     * @return ??JSON
     * @throws JsonProcessingException JSON??????
     */
    public static String toJsonString(Object value) throws JsonProcessingException {
        return mapper.writeValueAsString(value);
    }

    /**
     * 
     * @param value
     * @return
     */
    public static JsonNode toJsonNode(Object value) {
        return mapper.valueToTree(value);
    }

    /**
     * 
     * @param file
     * @param object
     * @throws IOException
     */
    public static void writeObjectToFile(File file, ObjectNode object) throws IOException {
        mapper.writeValue(file, object);
    }

    /**
     * JSON?????????.
     * @param value ?JSON
     * @param type ?
     * @return ??
     * @throws IOException ??????????
     */
    public static <T> T readJsonString(String value, TypeReference<T> type) throws IOException {
        return mapper.readValue(value, type);
    }

    /**
     * 
     * @param value
     * @param klass
     * @return
     * @throws IOException
     */
    public static <T> T readJsonString(String value, Class<T> klass) throws IOException {
        return mapper.readValue(value, klass);
    }

    /**
     * 
     * @param value
     * @return
     * @throws IOException
     */
    public static Map<String, String> readJsonStringAsStringMap(String value) throws IOException {
        return mapper.readValue(value, new TypeReference<Map<String, String>>() {
        });
    }

    /**
     * 
     * @param value
     * @return
     * @throws IOException
     */
    public static JsonNode readJsonStringAsNode(String value) throws IOException {
        return mapper.readTree(value);
    }

    /**
     * 
     * @param node
     * @param type
     * @return
     * @throws IOException
     */
    public static <T> T readJsonNode(JsonNode node, TypeReference<T> type) throws IOException {
        return readJsonParser(node.traverse(), type);
    }

    /**
     * 
     * @param node
     * @param type
     * @return
     * @throws IOException
     */
    public static <T> T readJsonNode(JsonNode node, Class<T> type) throws IOException {
        return readJsonParser(node.traverse(), type);
    }

    /**
     * 
     * @param jsonp
     * @param type
     * @return
     * @throws IOException
     */
    public static <T> T readJsonParser(JsonParser jsonp, TypeReference<T> type) throws IOException {
        return mapper.readValue(jsonp, type);
    }

    /**
     * 
     * @param jsonp
     * @param type
     * @return
     * @throws IOException
     */
    public static <T> T readJsonParser(JsonParser jsonp, Class<T> type) throws IOException {
        return mapper.readValue(jsonp, type);
    }

}