/*
 * Copyright 2005-2008 Les Hazlewood
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jsecurity.web.tags;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.jsecurity.SecurityUtils;
import org.jsecurity.subject.Subject;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.TagSupport;

/**
 * @since 0.1
 * @author Les Hazlewood
 */
public abstract class SecureTag extends TagSupport {

    protected transient final Log log = LogFactory.getLog( getClass() );

    public SecureTag(){}

    protected Subject getSubject() {
        return SecurityUtils.getSubject();
    }

    protected void verifyAttributes() throws JspException {
    }

    public int doStartTag() throws JspException {

        verifyAttributes();

        return onDoStartTag();
    }

    public abstract int onDoStartTag() throws JspException;
}