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/*
 * Copyright (c) 2016 Ian Bondoc
 *
 * This file is part of Djeng
 *
 * Djeng 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.
 *
 * Djeng 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
 * .
 *
 */
package org.chiknrice.djeng;

import java.util.Iterator;
import java.util.List;

import static org.chiknrice.djeng.XmlConfig.*;

/**
 * @author Ian Bondoc
 */
public final class CoreAttributes {

    public static final Attribute ID;
    public static final Attribute CODEC;
    public static final Attribute CLASS;
    public static final Attribute INDEX;
    public static final Attribute DESCRIPTION;
    public static final Attribute MASK; // TODO: implement mask in the schema
    public static final Attribute SUB_ELEMENT_CODECS_MAP;

    static {
        ID = new Attribute("id", NAMESPACE);
        CODEC = new Attribute("codec", NAMESPACE);
        CLASS = new Attribute("class", NAMESPACE);
        INDEX = new Attribute("index", NAMESPACE);
        DESCRIPTION = new Attribute("description", NAMESPACE);
        MASK = new Attribute("packed", NAMESPACE);
        // doesn't map to actual xml attribute but used for composite codecs
        SUB_ELEMENT_CODECS_MAP = new Attribute("sub-element-codecs-map", NAMESPACE);
    }

    static Object mapType(Attribute attribute, String value, List customTypeMappers) {
        try {
            Object objectValue = null;
            switch (attribute.getName()) {
                case "class":
                    try {
                        objectValue = Class.forName(value);
                    } catch (ClassNotFoundException e) {
                        throw new RuntimeException("Class not found " + e.getMessage(), e);
                    }
                    break;
                default:
            }
            Iterator iterator = customTypeMappers.iterator();
            while (objectValue == null && iterator.hasNext()) {
                AttributeTypeMapper customTypeMapper = iterator.next();
                objectValue = customTypeMapper.mapType(attribute, value);
            }
            if (objectValue == null) {
                return value;
            } else {
                return objectValue;
            }
        } catch (Exception e) {
            throw new RuntimeException(e.getMessage(), e);
        }
    }

}