Java tutorial
/* * Copyright 2000-2011 Enonic AS * http://www.enonic.com/license */ package com.enonic.cms.domain.security.user; import java.io.Serializable; import java.util.ArrayList; import java.util.Collection; import java.util.List; import org.apache.commons.lang.builder.HashCodeBuilder; import com.enonic.cms.domain.InvalidKeyException; public class UserKey implements Serializable { private String value; public UserKey(String key) { if (key.startsWith("#")) { key = key.substring(1); } init(key); } private void init(String value) { if (value == null) { throw new InvalidKeyException(value, this.getClass()); } this.value = value; } public boolean equals(Object o) { if (this == o) { return true; } if (o == null || getClass() != o.getClass()) { return false; } UserKey userKey = (UserKey) o; if (!value.equals(userKey.value)) { return false; } return true; } public int hashCode() { final int initialNonZeroOddNumber = 463; final int multiplierNonZeroOddNumber = 723; return new HashCodeBuilder(initialNonZeroOddNumber, multiplierNonZeroOddNumber).append(value).toHashCode(); } public String toString() { return value; } public static Collection<UserKey> parseCollection(String[] keys) { List<UserKey> list = new ArrayList<UserKey>(); for (String key : keys) { list.add(new UserKey(key)); } return list; } }