ServerConfig.java

package org.simplejavamail.mailer.config;

import static java.lang.String.format;
import static org.simplejavamail.util.ConfigLoader.Property.*;
import static org.simplejavamail.util.ConfigLoader.valueOrProperty;
import static org.simplejavamail.internal.util.MiscUtil.checkArgumentNotEmpty;
import static org.simplejavamail.internal.util.MiscUtil.valueNullOrEmpty;

public class ServerConfig {
	private final String host;
	private final Integer port;
	private final String username;
	private final String password;

	/**
	 * No-arg constructor short-cut. Works only with populated config files.
	 *
	 * @see #ServerConfig(String, Integer, String, String)
	 */
	public ServerConfig() {
		this(null, null, null, null);
	}

	/**
	 * 'Anonymous smtp' constructor short-cut. If provided, username and / or password is loaded from config file.
	 *
	 * @param host The address URL of the SMTP server to be used.
	 * @param port The port of the SMTP server.
	 * @see #ServerConfig(String, Integer, String, String)
	 */
	public ServerConfig(final String host, final Integer port) {
		this(host, port, null, null);
	}

	/**
	 * 'Non-authenticated smtp' constructor short-cut. If provided, password is loaded from config file.
	 *
	 * @param host     The address URL of the SMTP server to be used.
	 * @param port     The port of the SMTP server.
	 * @param username An optional username, may be <code>null</code>.
	 * @see #ServerConfig(String, Integer, String, String)
	 */
	public ServerConfig(final String host, final Integer port, final String username) {
		this(host, port, username, null);
	}

	/**
	 * Main constructor, overrides any relevant values that may have been provided in config file.
	 *
	 * @param host     The address URL of the SMTP server to be used.
	 * @param port     The port of the SMTP server.
	 * @param username An optional username, may be <code>null</code>.
	 * @param password An optional password, may be <code>null</code>.
	 */
	public ServerConfig(final String host, final Integer port, final String username, final String password) {
		this.host = valueOrProperty(host, SMTP_HOST);
		this.port = valueOrProperty(port, SMTP_PORT);
		this.username = valueOrProperty(username, SMTP_USERNAME);
		this.password = valueOrProperty(password, SMTP_PASSWORD);

		checkArgumentNotEmpty(this.host, "smtp host address not given and not configured in config file");
		checkArgumentNotEmpty(this.port, "smtp host port not given and not configured in config file");

		if (valueNullOrEmpty(this.username) && !valueNullOrEmpty(this.password)) {
			throw new IllegalArgumentException("Password provided but no username given as argument or in config file");
		}
	}

	@Override
	public String toString() {
		String str = format("%s:%s", host, port);
		if (username != null) {
			str += format(", username: %s", username);
		}
		if (password != null) {
			str += " (authenticated)";
		}
		return str;
	}

	public String getHost() {
		return host;
	}

	public Integer getPort() {
		return port;
	}

	public String getUsername() {
		return username;
	}

	public String getPassword() {
		return password;
	}
}