/**

 * 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, version 3 of the License.

 *

 * 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 java.util.ArrayList;

import javax.xml.bind.annotation.XmlTransient;

import static info.globalcode.sql.dk.Functions.findByName;

import java.util.Collections;

import java.util.regex.Pattern;

/**

 * <p>

 * List of configurables.</p>

 *

 * <p>

 * Can be backed by defaults – if value for given name is nof found in this

 * instance, we will look into defaults. Methods also accept defaultValue

 * parameter – is used if property is nof found even in default properties.</p>

 *

 * <p>

 * Typical use: </p>

 * <ul>

 * <li>this instance – ad-hoc properties from CLI options</li>

 * <li>default properties – from config file</li>

 * <li>defaultValue – hardcoded default</li>

 * </ul>

 *

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

 */

public class Properties extends ArrayList<Property> implements Cloneable {

	private Properties defaults;

	public Properties() {

	}

	public Properties(int initialCapacity) {

		super(initialCapacity);

	}

	@XmlTransient

	public Properties getDefaults() {

		return defaults;

	}

	public void setDefaults(Properties defaults) {

		this.defaults = defaults;

	}

	/**

	 * @param defaults the last/deepest defaults

	 */

	public void setLastDefaults(Properties defaults) {

		if (this.defaults == null) {

			this.defaults = defaults;

		} else {

			this.defaults.setLastDefaults(defaults);

		}

	}

	private Property findProperty(String name) {

		Property p = findByName(this, name);

		if (p == null && defaults != null) {

			p = defaults.findProperty(name);

		}

		return p;

	}

	public String getString(String name, String defaultValue) {

		Property p = findProperty(name);

		return p == null ? defaultValue : p.getValue();

	}

	public boolean getBoolean(String name, boolean defaultValue) {

		Property p = findProperty(name);

		return p == null ? defaultValue : Boolean.valueOf(p.getValue());

	}

	public int getInteger(String name, int defaultValue) {

		Property p = findProperty(name);

		return p == null ? defaultValue : Integer.valueOf(p.getValue());

	}

	public Pattern getPattern(String name, Pattern defaultValue) {

		Property p = findProperty(name);

		return p == null ? defaultValue : Pattern.compile(p.getValue());

	}

	public boolean hasProperty(String name) {

		return findByName(this, name) != null;

	}

	@Override

	public Properties clone() {

		Properties clone = new Properties(size());

		Collections.copy(clone, this);

		return clone;

	}

	/**

	 * @return merged this and backing defaults as Java Properties

	 */

	public java.util.Properties getJavaProperties() {

		java.util.Properties javaProperties = new java.util.Properties();

		duplicateTo(javaProperties);

		return javaProperties;

	}

	private void duplicateTo(java.util.Properties javaProperties) {

		if (defaults != null) {

			defaults.duplicateTo(javaProperties);

		}

		for (Property p : this) {

			String value = p.getValue();

			if (value != null) {

				javaProperties.setProperty(p.getName(), value);

			}

		}

	}

}