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package org.apache.taglibs.standard.tag.common.sql;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspTagException;
import javax.servlet.jsp.PageContext;
import javax.servlet.jsp.jstl.core.Config;
import javax.servlet.jsp.tagext.TagSupport;
import javax.sql.DataSource;
import org.apache.taglibs.standard.resources.Resources;
import org.apache.taglibs.standard.tag.common.core.Util;
/**
* Tag handler for <SetDataSource> in JSTL, used to create
* a simple DataSource for prototyping.
*
* @author Hans Bergsten
* @author Justyna Horwat
*/
public class SetDataSourceTagSupport extends TagSupport {
protected Object dataSource;
protected boolean dataSourceSpecified;
protected String jdbcURL;
protected String driverClassName;
protected String userName;
protected String password;
private int scope;
private String var;
//*********************************************************************
// Constructor and initialization
public SetDataSourceTagSupport() {
super();
init();
}
private void init() {
dataSource = null;
dataSourceSpecified = false;
jdbcURL = driverClassName = userName = password = null;
var = null;
scope = PageContext.PAGE_SCOPE;
}
//*********************************************************************
// Accessor methods
/**
* Setter method for the scope of the variable to hold the
* result.
*
*/
public void setScope(String scope) {
this.scope = Util.getScope(scope);
}
public void setVar(String var) {
this.var = var;
}
//*********************************************************************
// Tag logic
public int doStartTag() throws JspException {
DataSource ds;
if (dataSource != null) {
ds = DataSourceUtil.getDataSource(dataSource, pageContext);
} else {
if (dataSourceSpecified) {
throw new JspException(
Resources.getMessage("SQL_DATASOURCE_NULL"));
}
DataSourceWrapper dsw = new DataSourceWrapper();
try {
// set driver class iff provided by the tag
if (driverClassName != null) {
dsw.setDriverClassName(driverClassName);
}
}
catch (Exception e) {
throw new JspTagException(
Resources.getMessage("DRIVER_INVALID_CLASS",
e.toString()), e);
}
dsw.setJdbcURL(jdbcURL);
dsw.setUserName(userName);
dsw.setPassword(password);
ds = (DataSource) dsw;
}
if (var != null) {
pageContext.setAttribute(var, ds, scope);
} else {
Config.set(pageContext, Config.SQL_DATA_SOURCE, ds, scope);
}
return SKIP_BODY;
}
// Releases any resources we may have (or inherit)
public void release() {
init();
}
}