001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.apache.shiro.web.tags;
020
021import javax.servlet.jsp.JspException;
022import javax.servlet.jsp.tagext.TagSupport;
023
024import org.slf4j.Logger;
025import org.slf4j.LoggerFactory;
026
027import org.apache.shiro.SecurityUtils;
028import org.apache.shiro.subject.Subject;
029
030/**
031 * @since 0.1
032 */
033public abstract class SecureTag extends TagSupport {
034
035    private static final Logger LOGGER = LoggerFactory.getLogger(SecureTag.class);
036
037    public SecureTag() {
038    }
039
040    protected Subject getSubject() {
041        return SecurityUtils.getSubject();
042    }
043
044    protected void verifyAttributes() throws JspException {
045    }
046
047    public int doStartTag() throws JspException {
048
049        verifyAttributes();
050
051        return onDoStartTag();
052    }
053
054    public abstract int onDoStartTag() throws JspException;
055}