/**

 * SQL-DK

 * Copyright © 2013 František Kučera (frantovo.cz)

 *

 * 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 info.globalcode.sql.dk.configuration;

import static info.globalcode.sql.dk.Xmlns.CONFIGURATION;

import info.globalcode.sql.dk.formatting.Formatter;

import info.globalcode.sql.dk.formatting.FormatterContext;

import info.globalcode.sql.dk.formatting.FormatterException;

import java.lang.reflect.Constructor;

import java.lang.reflect.InvocationTargetException;

import javax.xml.bind.annotation.XmlElement;

/**

 * Configured (but not yet instantiated) formatter.

 *

 * @author Ing. František Kučera (frantovo.cz)

 */

public class FormatterDefinition implements NameIdentified {

	private String name;

	private String className;

	private Properties properties = new Properties();

	public FormatterDefinition() {

	}

	public FormatterDefinition(String name, String className) {

		this.name = name;

		this.className = className;

	}

	public FormatterDefinition(String name, String className, Properties properties) {

		this(name, className);

		this.properties = properties;

	}

	@XmlElement(name = "name", namespace = CONFIGURATION)

	@Override

	public String getName() {

		return name;

	}

	public void setName(String name) {

		this.name = name;

	}

	/**

	 * Filter's class. Must implement the

	 * <code>info.globalcode.sql.dk.formatting.Formatter</code> interface.

	 * Subclassing the

	 * <code>info.globalcode.sql.dk.formatting.AbstractFormatter</code> is strongly recommended.

	 * The constructor must accept one parameter:

	 * <code>info.globalcode.sql.dk.formatting.FormatterContext</code>

	 *

	 * @return fully qualified class name

	 */

	@XmlElement(name = "class", namespace = CONFIGURATION)

	public String getClassName() {

		return className;

	}

	public void setClassName(String className) {

		this.className = className;

	}

	@XmlElement(name = "property", namespace = CONFIGURATION)

	public Properties getProperties() {

		return properties;

	}

	public void setProperties(Properties properties) {

		this.properties = properties;

	}

	/**

	 * @param context

	 * @return

	 * @throws FormatterException

	 */

	public Formatter getInstance(FormatterContext context) throws FormatterException {

		context.getProperties().setDefaults(properties);

		try {

			Constructor constructor = Class.forName(className).getConstructor(context.getClass());

			Object instance = constructor.newInstance(context);

			if (instance instanceof Formatter) {

				return (Formatter) instance;

			} else {

				throw new FormatterException("Formatter " + instance + " does not implement the " + Formatter.class.getName() + " interface");

			}

		} catch (ClassNotFoundException e) {

			throw new FormatterException("Formatter class does not exist: " + className, e);

		} catch (NoSuchMethodException e) {

			throw new FormatterException("Formatter class with no valid constructor: " + className, e);

		} catch (InstantiationException | IllegalAccessException | InvocationTargetException e) {

			throw new FormatterException("Formatter's constructor caused an error: " + className, e);

		}

	}

}