org.apache.taglibs.standard.tag.common.sql.DriverTag Maven / Gradle / Ivy
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/*
* The contents of this file are subject to the terms
* of the Common Development and Distribution License
* (the "License"). You may not use this file except
* in compliance with the License.
*
* You can obtain a copy of the license at
* glassfish/bootstrap/legal/CDDLv1.0.txt or
* https://glassfish.dev.java.net/public/CDDLv1.0.html.
* See the License for the specific language governing
* permissions and limitations under the License.
*
* When distributing Covered Code, include this CDDL
* HEADER in each file and include the License file at
* glassfish/bootstrap/legal/CDDLv1.0.txt. If applicable,
* add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your
* own identifying information: Portions Copyright [yyyy]
* [name of copyright owner]
*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
*
* Portions Copyright Apache Software Foundation.
*/
package org.apache.taglibs.standard.tag.common.sql;
import javax.servlet.ServletContext;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspTagException;
import javax.servlet.jsp.PageContext;
import javax.servlet.jsp.tagext.TagSupport;
/**
* Tag handler for <Driver> in JSTL, used to create
* a simple DataSource for prototyping.
*
* @author Hans Bergsten
*/
public class DriverTag extends TagSupport {
private static final String DRIVER_CLASS_NAME =
"javax.servlet.jsp.jstl.sql.driver";
private static final String JDBC_URL =
"javax.servlet.jsp.jstl.sql.jdbcURL";
private static final String USER_NAME =
"javax.servlet.jsp.jstl.sql.userName";
private static final String PASSWORD =
"javax.servlet.jsp.jstl.sql.password";
private String driverClassName;
private String jdbcURL;
private int scope = PageContext.PAGE_SCOPE;
private String userName;
private String var;
//*********************************************************************
// Accessor methods
public void setDriver(String driverClassName) {
this.driverClassName = driverClassName;
}
public void setJdbcURL(String jdbcURL) {
this.jdbcURL = jdbcURL;
}
/**
* Setter method for the scope of the variable to hold the
* result.
*
*/
public void setScope(String scopeName) {
if ("page".equals(scopeName)) {
scope = PageContext.PAGE_SCOPE;
}
else if ("request".equals(scopeName)) {
scope = PageContext.REQUEST_SCOPE;
}
else if ("session".equals(scopeName)) {
scope = PageContext.SESSION_SCOPE;
}
else if ("application".equals(scopeName)) {
scope = PageContext.APPLICATION_SCOPE;
}
}
public void setUserName(String userName) {
this.userName = userName;
}
public void setVar(String var) {
this.var = var;
}
//*********************************************************************
// Tag logic
public int doStartTag() throws JspException {
DataSourceWrapper ds = new DataSourceWrapper();
try {
ds.setDriverClassName(getDriverClassName());
}
catch (Exception e) {
throw new JspTagException("Invalid driver class name: " +
e.toString(), e);
}
ds.setJdbcURL(getJdbcURL());
ds.setUserName(getUserName());
ds.setPassword(getPassword());
pageContext.setAttribute(var, ds, scope);
return SKIP_BODY;
}
//*********************************************************************
// Private utility methods
private String getDriverClassName() {
if (driverClassName != null) {
return driverClassName;
}
ServletContext application = pageContext.getServletContext();
return application.getInitParameter(DRIVER_CLASS_NAME);
}
private String getJdbcURL() {
if (jdbcURL != null) {
return jdbcURL;
}
ServletContext application = pageContext.getServletContext();
return application.getInitParameter(JDBC_URL);
}
private String getUserName() {
if (userName != null) {
return userName;
}
ServletContext application = pageContext.getServletContext();
return application.getInitParameter(USER_NAME);
}
private String getPassword() {
ServletContext application = pageContext.getServletContext();
return application.getInitParameter(PASSWORD);
}
}