fr.free.movierenamer.utils.JSONUtils.java Source code

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Here is the source code for fr.free.movierenamer.utils.JSONUtils.java

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/*
 * movie-renamer-core
 * Copyright (C) 2012 Nicolas Magr
 *
 * This program 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.
 *
 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package fr.free.movierenamer.utils;

import java.util.AbstractList;
import java.util.List;
import org.json.simple.JSONArray;
import org.json.simple.JSONObject;

/**
 * Class JSONUtils
 *
 * @author Nicolas Magr
 * @author Simon QUMNEUR
 */
public final class JSONUtils {

    public static JSONObject selectObject(String path, final JSONObject rootObject) {
        try {
            JSONObject toSearch = rootObject;
            String[] nodes = path.split("/");
            for (String node : nodes) {
                toSearch = (JSONObject) toSearch.get(node);
            }
            return toSearch;
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    public static JSONObject selectFirstObject(final JSONObject rootObject) {
        try {
            JSONObject toSearch = rootObject;
            return (JSONObject) toSearch.get(toSearch.keySet().iterator().next());
        } catch (Exception e) {
            //
        }
        return null;
    }

    public static List<JSONObject> selectList(String path, final JSONObject rootObject) {
        try {
            JSONObject toSearch = rootObject;
            int last = path.lastIndexOf('/');
            if (last >= 0) {
                toSearch = selectObject(path.substring(0, last), toSearch);
            }
            JSONArray array = (JSONArray) toSearch.get(path.substring(last + 1, path.length()));
            return jsonList(array);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    public static String selectString(String attribute, final JSONObject node) {
        try {
            if (node == null) {
                return null;
            } else {
                Object val = node.get(attribute);
                if (val == null) {
                    return null;
                } else {
                    return String.valueOf(val);
                }
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    public static Integer selectInteger(String attribute, final JSONObject node) {
        return Integer.valueOf(selectString(attribute, node));
    }

    public static Double selectDouble(String attribute, final JSONObject node) {
        return Double.valueOf(selectString(attribute, node));
    }

    private static List<JSONObject> jsonList(final Object array) {
        return new AbstractList<JSONObject>() {

            @Override
            public JSONObject get(int index) {
                if (array == null)
                    return null;
                return (JSONObject) ((JSONArray) array).get(index);
            }

            @Override
            public int size() {
                if (array == null)
                    return 0;
                return ((JSONArray) array).size();
            }
        };
    }

    private JSONUtils() {
        throw new UnsupportedOperationException();
    }
}