src/org/jsecurity/web/tags/HasAnyRolesTag.java

/*
 * Copyright 2005-2008 Jeremy Haile
 *
 * 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.jsecurity.subject.Subject;

/**
 * Displays body content if the current user has any of the roles specified.
 * @since 0.2
 * @author Jeremy Haile
 */
public class HasAnyRolesTag extends RoleTag {

    // Delimeter that separates role names in tag attribute
    private static final String ROLE_NAMES_DELIMETER = ",";

    public HasAnyRolesTag(){}

    protected boolean showTagBody( String roleNames ) {
        boolean hasAnyRole = false;

        Subject subject = getSubject();

        if( subject != null ) {

            // Iterate through roles and check to see if the user has one of the roles
            for( String role : roleNames.split(ROLE_NAMES_DELIMETER) ) {

                if( subject.hasRole( role.trim() ) ) {
                    hasAnyRole = true;
                    break;
                }

            }

        }

        return hasAnyRole;
    }

}