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1 /* 2 * The Apache Software License, Version 1.1 3 * 4 * Copyright (c) 1999 The Apache Software Foundation. All rights 5 * reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the 17 * distribution. 18 * 19 * 3. The end-user documentation included with the redistribution, if 20 * any, must include the following acknowlegement: 21 * "This product includes software developed by the 22 * Apache Software Foundation (http://www.apache.org/)." 23 * Alternately, this acknowlegement may appear in the software itself, 24 * if and wherever such third-party acknowlegements normally appear. 25 * 26 * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software 27 * Foundation" must not be used to endorse or promote products derived 28 * from this software without prior written permission. For written 29 * permission, please contact apache@apache.org. 30 * 31 * 5. Products derived from this software may not be called "Apache" 32 * nor may "Apache" appear in their names without prior written 33 * permission of the Apache Group. 34 * 35 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 36 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 37 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 38 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR 39 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 41 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 42 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 43 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 44 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 45 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 46 * SUCH DAMAGE. 47 * ==================================================================== 48 * 49 * This software consists of voluntary contributions made by many 50 * individuals on behalf of the Apache Software Foundation. For more 51 * information on the Apache Software Foundation, please see 52 * <http://www.apache.org/>;. 53 * 54 */ 55 56 package org.apache.commons.jelly.tags.sql; 57 58 import java.util.*; 59 60 import org.apache.commons.jelly.JellyContext; 61 import org.apache.commons.jelly.JellyException; 62 import org.apache.commons.jelly.TagSupport; 63 import org.apache.commons.jelly.XMLOutput; 64 65 /*** 66 * <p>Tag handler for <Driver> in JSTL, used to create 67 * a simple DataSource for prototyping.</p> 68 * 69 * @author Hans Bergsten 70 */ 71 public class DriverTag extends TagSupport { 72 private static final String DRIVER_CLASS_NAME = 73 "javax.servlet.jsp.jstl.sql.driver"; 74 private static final String JDBC_URL = "javax.servlet.jsp.jstl.sql.jdbcURL"; 75 private static final String USER_NAME = "javax.servlet.jsp.jstl.sql.userName"; 76 private static final String PASSWORD = "javax.servlet.jsp.jstl.sql.password"; 77 78 private String driverClassName; 79 private String jdbcURL; 80 private String scope = "page"; 81 private String userName; 82 private String var; 83 84 //********************************************************************** 85 // Accessor methods 86 87 public void setDriver(String driverClassName) { 88 this.driverClassName = driverClassName; 89 } 90 91 public void setJdbcURL(String jdbcURL) { 92 this.jdbcURL = jdbcURL; 93 } 94 95 /** 96 * Sets the scope of the variable to hold the 97 * result. 98 * 99 */ 100 public void setScope(String scopeName) { 101 this.scope = scopeName; 102 } 103 104 public void setUserName(String userName) { 105 this.userName = userName; 106 } 107 108 public void setVar(String var) { 109 this.var = var; 110 } 111 112 //********************************************************************** 113 // Tag logic 114 115 public void doTag(XMLOutput output) throws Exception { 116 DataSourceWrapper ds = new DataSourceWrapper(); 117 try { 118 ds.setDriverClassName(getDriverClassName()); 119 } 120 catch (Exception e) { 121 throw new JellyException("Invalid driver class name: " + e.getMessage()); 122 } 123 ds.setJdbcURL(getJdbcURL()); 124 ds.setUserName(getUserName()); 125 ds.setPassword(getPassword()); 126 context.setVariable(var, ds); 127 } 128 129 //********************************************************************* 130 // Private utility methods 131 132 private String getDriverClassName() { 133 if (driverClassName != null) { 134 return driverClassName; 135 } 136 return getInitParameter(DRIVER_CLASS_NAME); 137 } 138 139 private String getJdbcURL() { 140 if (jdbcURL != null) { 141 return jdbcURL; 142 } 143 return getInitParameter(JDBC_URL); 144 } 145 146 private String getUserName() { 147 if (userName != null) { 148 return userName; 149 } 150 return getInitParameter(USER_NAME); 151 } 152 153 private String getPassword() { 154 return getInitParameter(PASSWORD); 155 } 156 157 protected String getInitParameter(String key) { 158 return ""; 159 } 160 }

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