envoy/src/main/java/envoy/client/ConfigItem.java

package envoy.client;

import java.util.function.Function;

/**
 * Contains a single {@link Config} value as well as the corresponding command
 * line arguments and its default value.<br>
 * <br>
 * Project: <strong>envoy-clientChess</strong><br>
 * File: <strong>ConfigItem.javaEvent.java</strong><br>
 * Created: <strong>21.12.2019</strong><br>
 * 
 * @author Kai S. K. Engelbart
 * @param <T> the type of the config item's value
 * @since Envoy v0.2-alpha
 */
public class ConfigItem<T> {

	private String				commandLong, commandShort;
	private Function<String, T>	parseFunction;
	private T					value;

	/**
	 * Initializes a {@link ConfigItem}
	 * 
	 * @param commandLong   the long command line argument to set this value
	 * @param commandShort  the short command line argument to set this value
	 * @param parseFunction the {@code Function<String, T>} that parses the value
	 *                      from a string
	 * @param defaultValue  the optional default value to set before parsing
	 * @since Envoy v0.2-alpha
	 */
	public ConfigItem(String commandLong, String commandShort, Function<String, T> parseFunction, T defaultValue) {
		this.commandLong	= commandLong;
		this.commandShort	= commandShort;
		this.parseFunction	= parseFunction;
		value				= defaultValue;
	}

	/**
	 * Parses this {@ConfigItem}'s value from a string
	 * @param input the string to parse from
	 * @since Envoy v0.2-alpha
	 */
	public void parse(String input) { value = parseFunction.apply(input); }

	/**
	 * @return The long command line argument to set the value of this {@link ConfigItem}
	 * @since Envoy v0.2-alpha
	 */
	public String getCommandLong() { return commandLong; }

	/**
	 * @return The short command line argument to set the value of this {@link ConfigItem}
	 * @since Envoy v0.2-alpha
	 */
	public String getCommandShort() { return commandShort; }

	/**
	 * @return the value of this {@link ConfigItem}
	 * @since Envoy v0.2-alpha
	 */
	public T get() { return value; }
}