// Copyright (c) 2003-2014, Jodd Team (jodd.org). All Rights Reserved.
package jodd.servlet.tag;
import javax.servlet.jsp.tagext.SimpleTagSupport;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.PageContext;
import javax.servlet.http.HttpServletRequest;
/**
* Removes attribute from the scope.
*/
public class UnsetTag extends SimpleTagSupport {
protected String name;
private static final String SCOPE_APPLICATION = "application";
private static final String SCOPE_SESSION = "session";
private static final String SCOPE_REQUEST = "request";
private static final String SCOPE_PAGE = "page";
public void setName(String name) {
this.name = name;
}
protected String scope;
public void setScope(String scope) {
this.scope = scope;
}
@Override
public void doTag() throws JspException {
PageContext pageContext = (PageContext) getJspContext();
HttpServletRequest request = (HttpServletRequest) pageContext.getRequest();
String scopeValue = scope != null ? scope.toLowerCase() : SCOPE_PAGE;
if (scopeValue.equals(SCOPE_APPLICATION)) {
request.getSession().getServletContext().removeAttribute(name);
} else if (scopeValue.equals(SCOPE_SESSION)) {
request.getSession().removeAttribute(name);
} else if (scopeValue.equals(SCOPE_REQUEST)) {
request.removeAttribute(name);
} else if (scopeValue.equals(SCOPE_PAGE)) {
pageContext.removeAttribute(name);
} else {
throw new JspException("Invalid scope: " + scope);
}
}
}