/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
* Free SoftwareFoundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.jstl.el;
import com.caucho.jsp.PageContextImpl;
import com.caucho.xpath.Env;
import com.caucho.xpath.XPath;
import com.caucho.xpath.XPathException;
import org.w3c.dom.Node;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.TagSupport;
import java.util.logging.Level;
import java.util.logging.Logger;
public class XmlSetTag extends TagSupport {
private static final Logger log
= Logger.getLogger(XmlSetTag.class.getName());
private com.caucho.xpath.Expr _select;
private String _var;
private String _scope;
/**
* Sets the JSP-EL expression value.
*/
public void setSelect(com.caucho.xpath.Expr select)
{
_select = select;
}
/**
* Sets the variable to be saved.
*/
public void setVar(String var)
{
_var = var;
}
/**
* Sets the scope of the variable to be saved.
*/
public void setScope(String scope)
{
_scope = scope;
}
/**
* Process the tag.
*/
public int doStartTag()
throws JspException
{
try {
PageContextImpl pageContext = (PageContextImpl) this.pageContext;
Object value = evalObject(pageContext, _select);
CoreSetTag.setValue(pageContext, _var, _scope, value);
} catch (JspException e) {
throw e;
} catch (Exception e) {
log.log(Level.FINE, e.toString(), e);
}
return SKIP_BODY;
}
/**
* Returns the value as an object.
*/
public static Object evalObject(PageContextImpl pageContext,
com.caucho.xpath.Expr select)
throws XPathException, JspException
{
try {
Env env = XPath.createEnv();
env.setVarEnv(pageContext.getVarEnv());
Node node = pageContext.getNodeEnv();
Object value = select.evalObject(node, env);
env.free();
return value;
} catch (javax.el.ELException e) {
throw new JspException(e);
}
}
}