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The source code// $Header: /home/cvs/jakarta-jmeter/src/protocol/jdbc/org/apache/jmeter/protocol/jdbc/util/DBKey.java,v 1.10 2004/02/26 00:22:27 sebb Exp $ /* * Copyright 2001-2004 The Apache Software Foundation. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * */ package org.apache.jmeter.protocol.jdbc.util; import java.io.Serializable; public class DBKey implements Serializable //TODO does it need to be serializable? { private final String driver; private final String url; private final String username; private final String password; /** * Cache for the hashCode value since this class will frequently be used * as a Map key. */ private transient int hashCode = 0; public DBKey( String driver, String url, String username, String password) { if (driver == null) { throw new IllegalArgumentException( "DBKey 'driver' must be non-null"); } if (url == null) { throw new IllegalArgumentException("DBKey 'url' must be non-null"); } // Other fields are allowed to be null this.driver = driver; this.url = url; this.username = username; this.password = password; // All the fields used by the hashCode are now fixed, so calculate it hashCode = calculateHashCode(); } // Dummy constructor to allow JMeter test suite to work public DBKey(){ this("","","",""); } public String getUrl() { return url; } public String getUsername() { return username; } public String getPassword() { return password; } public String getDriver() { return driver; } /** * Determines if the two DBKey objects have the same property values. * @param o2 DBKey to compare with this one. * @return bool True if equal, false otherwise. */ public boolean equals(Object o2) { if (this == o2) { return true; } if (!(o2 instanceof DBKey)) { return false; } DBKey key = (DBKey)o2; if (!driver.equals(key.driver)) { return false; } if (!url.equals(key.url)) { return false; } if (username == null) { if (key.username != null) { return false; } } else { if (!username.equals(key.username)) { return false; } } if (password == null) { if (key.password != null) { return false; } } else { if (!password.equals(key.password)) { return false; } } return true; } public int hashCode() { hashCode = calculateHashCode(); return hashCode; } private int calculateHashCode() { // Implementation based on Joshua Bloch's _Effective Java_ // http://developer.java.sun.com/developer/Books/effectivejava/Chapter3.pdf int result = 17; result = 37 * result + driver.hashCode(); result = 37 * result + url.hashCode(); result = 37 * result + (username == null ? 0 : username.hashCode()); result = 37 * result + (password == null ? 0 : password.hashCode()); return result; } public String toString() { StringBuffer ret = new StringBuffer(); ret.append("Class=DBKey(" + "\n"); ret.append("driver=" + driver + "\n"); ret.append("url=" + url + "\n"); ret.append("username=" + username + "\n"); ret.append(")"); return ret.toString(); } } |
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