edu.uiowa.icts.util.DebugRolesTag.java Source code

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Here is the source code for edu.uiowa.icts.util.DebugRolesTag.java

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package edu.uiowa.icts.util;

/*
 * #%L
 * spring-utils
 * %%
 * Copyright (C) 2010 - 2015 University of Iowa Institute for Clinical and Translational Science (ICTS)
 * %%
 * 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.
 * #L%
 */

import java.util.Collection;
import java.util.Iterator;

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

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.context.SecurityContextHolder;

/**
 * <p>DebugRolesTag class.</p>
 *
 * @user rrlorent
 * @date Sep 9, 2013
 * @author schappetj
 * @version $Id: $
 */
public class DebugRolesTag extends BodyTagSupport {

    private static final long serialVersionUID = 2380363263311326079L;

    private static final Log log = LogFactory.getLog(DebugRolesTag.class);

    private String var = null;

    private Iterator<? extends GrantedAuthority> iterator = null;

    /**
     * <p>doStartTag.</p>
     *
     * @return a int.
     */
    public int doStartTag() {

        Authentication auth = SecurityContextHolder.getContext().getAuthentication();
        if (auth != null) {

            Collection<? extends GrantedAuthority> authorities = auth.getAuthorities();
            if (authorities != null) {

                iterator = authorities.iterator();

            } else {
                log.debug("no authorities, list is null");
            }

        } else {
            log.debug("authentication object is null");
        }

        if (iterator != null && iterator.hasNext()) {
            pageContext.setAttribute("role", iterator.next().getAuthority());
            return EVAL_BODY_INCLUDE;
        }

        return SKIP_BODY;
    }

    /**
     * <p>doAfterBody.</p>
     *
     * @return a int.
     */
    public int doAfterBody() {
        if (iterator != null && iterator.hasNext()) {
            pageContext.setAttribute("role", iterator.next().getAuthority());
            return EVAL_BODY_AGAIN;
        }
        return SKIP_BODY;
    }

    /**
     * <p>doEndTag.</p>
     *
     * @return a int.
     * @throws javax.servlet.jsp.JspException if any.
     */
    public int doEndTag() throws JspException {
        this.iterator = null;
        this.var = null;
        return super.doEndTag();
    }

    /**
     * <p>Getter for the field <code>var</code>.</p>
     *
     * @return a {@link java.lang.String} object.
     */
    public String getVar() {
        return var;
    }

    /**
     * <p>Setter for the field <code>var</code>.</p>
     *
     * @param var a {@link java.lang.String} object.
     */
    public void setVar(String var) {
        this.var = var;
    }

}