de.cubeisland.engine.configuration.SectionFactory Maven / Gradle / Ivy

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/**
 * The MIT License (MIT)
 *
 * Copyright (c) 2013 Anselm Brehme, Phillip Schichtel
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
package de.cubeisland.engine.configuration;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Modifier;

import de.cubeisland.engine.configuration.exception.ConfigInstantiationException;

/**
 * This factory provides a Method to create a new Instance of a Section
 */
public class SectionFactory
{
    /**
     * Returns true if the {@link Section} class isAssignableFrom the given class
     *
     * @param clazz the class to check
     *
     * @return true if the given class implements {@link Section}
     */
    public static boolean isSectionClass(Class clazz)
    {
        return Section.class.isAssignableFrom(clazz);
    }

    /**
     * Creates a new Instance of the sectionClass using its default-constructor
     * the parent is needed when trying to instantiating a non-static inner-class Section
     *
     * @param sectionClass the class of the Section to instantiate
     * @param parent       an instance of the enclosing class of the sectionClass
     *
     * @return the instantiated Section
     */
    public static Section newSectionInstance(Class sectionClass, Object parent) throws ConfigInstantiationException
    {
        try
        {
            if (sectionClass.getEnclosingClass() == null)
            {
                return sectionClass.newInstance();
            }
            else if (Modifier.isStatic(sectionClass.getModifiers()))
            {
                return sectionClass.newInstance();
            }
            else
            {
                return sectionClass.getDeclaredConstructor(sectionClass.getEnclosingClass()).newInstance(parent);
            }
        }
        catch (IllegalAccessException e)
        {
            throw new ConfigInstantiationException(sectionClass, e);
        }
        catch (InstantiationException e)
        {
            throw new ConfigInstantiationException(sectionClass, e);
        }
        catch (NoSuchMethodException e)
        {
            throw new ConfigInstantiationException(sectionClass, e);
        }
        catch (InvocationTargetException e)
        {
            throw new ConfigInstantiationException(sectionClass, e);
        }
    }
}