Java tutorial
package com.tesora.dve.siteprovider; /* * #%L * Tesora Inc. * Database Virtualization Engine * %% * Copyright (C) 2011 - 2014 Tesora Inc. * %% * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License, version 3, * as published by the Free Software Foundation. * * 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. * #L% */ import org.apache.commons.lang.StringUtils; public enum DynamicSiteStatus { ONLINE("ONLINE"), OFFLINE("OFFLINE"), FAILED("FAILED"), DELETED("DELETED"); private String value; private DynamicSiteStatus(String value) { this.value = value; } @Override public String toString() { return this.value; } public static DynamicSiteStatus fromString(String s) { if (s == null || "".equals(s)) throw new IllegalArgumentException("Value cannot be null or empty!"); for (DynamicSiteStatus sis : values()) { if (StringUtils.equalsIgnoreCase(sis.name(), s)) { return sis; } } throw new IllegalArgumentException("'" + s + "' is not a valid staus value"); } public boolean isValidUserOption() { return StringUtils.equalsIgnoreCase(ONLINE.name(), value) || StringUtils.equalsIgnoreCase(OFFLINE.name(), value); } public static boolean isValidUserOption(String option) { for (DynamicSiteStatus s : values()) { if ((s == ONLINE || s == OFFLINE) && StringUtils.equalsIgnoreCase(s.name(), option)) { return true; } } return false; } }