com.homesnap.webserver.utils.JSonTools.java Source code

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Here is the source code for com.homesnap.webserver.utils.JSonTools.java

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package com.homesnap.webserver.utils;

/*
 * #%L
 * HomeSnapWebServer
 * %%
 * Copyright (C) 2011 - 2014 A. de Giuli
 * %%
 * This file is part of MyDomo done by A. de Giuli (arnaud.degiuli(at)free.fr).
 * 
 *     MyDomo is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     (at your option) any later version.
 * 
 *     MyDomo is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *     GNU General Public License for more details.
 * 
 *     You should have received a copy of the GNU General Public License
 *     along with MyDomo.  If not, see <http://www.gnu.org/licenses/>.
 * #L%
 */

import java.util.List;

import org.json.JSONObject;

import com.homesnap.engine.controller.Controller;
import com.homesnap.engine.house.Group;
import com.homesnap.engine.house.House;
import com.homesnap.engine.house.Label;
import com.homesnap.webserver.rest.MissingParameterRestOperation;
import com.homesnap.webserver.rest.RestOperationException;
import com.homesnap.webserver.rest.UnsupportedRestOperation;

public class JSonTools {

    public final static String ERROR = "error";
    public final static String ERROR_CLASSNAME = "className";
    public final static String ERROR_MESSAGE = "message";

    public final static String toJson(House house) {
        if (house == null) {
            return JSONObject.NULL.toString();
        } else {
            return String.valueOf(house.toJson());
        }
    }

    public final static String toJson(Group group) {
        if (group == null) {
            return JSONObject.NULL.toString();
        } else {
            return String.valueOf(group.toJson());
        }
    }

    public final static String toJsonGroups(List<Group> groups) {
        StringBuilder sb = new StringBuilder("[");
        for (Group group : groups) {
            sb.append(JSonTools.toJson(group));
            sb.append(",");
        }
        if (sb.length() > 1) {
            sb.setLength(sb.length() - 1);
        }
        sb.append("]");
        return sb.toString();
    }

    public final static String toJson(Label label) {
        if (label == null) {
            return JSONObject.NULL.toString();
        } else {
            return String.valueOf(label.toJson());
        }

    }

    public final static String toJson(List<Label> labels) {
        StringBuilder sb = new StringBuilder("[");
        for (Label label : labels) {
            sb.append(JSonTools.toJson(label));
            sb.append(",");
        }
        if (sb.length() > 1) {
            sb.setLength(sb.length() - 1);
        }
        sb.append("]");
        return sb.toString();
    }

    public final static String toJson(Controller controller) {
        if (controller == null) {
            return JSONObject.NULL.toString();
        } else {
            return String.valueOf(controller.toJson());
        }
    }

    public final static String toJson(MissingParameterRestOperation e) {
        return formatException(e);
    }

    public final static String toJson(UnsupportedRestOperation e) {
        return formatException(e);
    }

    public final static String toJson(RestOperationException e) {
        return formatException(e);
    }

    private final static String formatException(Exception e) {
        return "{" + ERROR + ": [{" + ERROR_CLASSNAME + ":'" + JSONObject.quote(e.getClass().getSimpleName())
                + "', " + ERROR_MESSAGE + " :'" + JSONObject.quote(e.getMessage()) + "'}]}";
    }

    public final static String formatNull() {
        return JSONObject.NULL.toString();
    }

    public final static JSONObject fromJson(String value) {
        if (formatNull().equals(value))
            return null;
        return new JSONObject(value);
    }
}