/*
* 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.rt;
import com.caucho.el.Expr;
import com.caucho.util.L10N;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.PageContext;
import javax.servlet.jsp.jstl.core.Config;
import javax.servlet.jsp.tagext.BodyContent;
import javax.servlet.jsp.tagext.BodyTagSupport;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpSession;
import javax.el.ValueExpression;
import javax.el.VariableMapper;
import java.util.Locale;
public class CoreSetTag extends BodyTagSupport {
private static L10N L = new L10N(CoreSetTag.class);
private Object _value;
private boolean _hasValue;
private String _var;
private String _scope;
private Object _target;
private String _property;
/**
* Sets the JSP-EL expression value.
*/
public void setValue(Object value)
{
_value = value;
_hasValue = true;
}
/**
* Sets the variable to assign
*/
public void setVar(String var)
{
_var = var;
}
/**
* Sets the scope of the variable.
*/
public void setScope(String scope)
{
_scope = scope;
}
/**
* Sets the target to be set.
*/
public void setTarget(Object target)
{
_target = target;
}
/**
* Sets the property to be set.
*/
public void setProperty(String property)
{
_property = property;
}
/**
* Process the tag.
*/
public int doStartTag()
throws JspException
{
if (! _hasValue)
return EVAL_BODY_BUFFERED;
if (_value instanceof ValueExpression && _var != null)
doMapVariable((ValueExpression) _value);
else if (_var != null)
doSetValue(_value);
else
doSetProperty(_value);
return SKIP_BODY;
}
public int doEndTag() throws JspException
{
BodyContent body = (BodyContent) getBodyContent();
if (body != null) {
String value = body.getString().trim();
if (_var != null)
doSetValue(value);
else
doSetProperty(value);
}
return EVAL_PAGE;
}
private void doMapVariable(ValueExpression valueExpr) {
VariableMapper mapper = pageContext.getELContext().getVariableMapper();
mapper.setVariable(_var, valueExpr);
}
private void doSetValue(Object value)
throws JspException
{
setValue(pageContext, _var, _scope, value);
}
private void doSetProperty(Object value)
throws JspException
{
Expr.setProperty(_target, _property, value);
}
public static void setValue(PageContext pageContext,
String var, String scope, Object value)
throws JspException
{
if (var == null) {
if (scope != null && ! "".equals(scope))
throw new JspException(L.l("var must not be null when scope '{0}' is set.",
scope));
}
else if ("".equals(var)) {
throw new JspException(L.l("var must not be ''"));
}
else if (scope == null || scope.equals("page")) {
if (value != null)
pageContext.setAttribute(var, value);
else
pageContext.removeAttribute(var);
}
else if (scope.equals("request")) {
if (value != null)
pageContext.getRequest().setAttribute(var, value);
else
pageContext.getRequest().removeAttribute(var);
}
else if (scope.equals("session")) {
if (value != null)
pageContext.getSession().setAttribute(var, value);
else
pageContext.getSession().removeAttribute(var);
}
else if (scope.equals("application")) {
if (value != null)
pageContext.getServletContext().setAttribute(var, value);
else
pageContext.getServletContext().removeAttribute(var);
}
else
throw new JspException(L.l("illegal scope value {0}", scope));
}
}