src/org/jsecurity/authz/aop/RoleAnnotationMethodInterceptor.java

/*
 * 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.authz.aop;

import org.jsecurity.aop.MethodInvocation;
import org.jsecurity.authz.AuthorizationException;
import org.jsecurity.authz.UnauthorizedException;
import org.jsecurity.authz.annotation.RequiresRoles;
import org.jsecurity.mgt.SecurityManager;

import java.util.Arrays;
import java.util.LinkedHashSet;
import java.util.Set;

/**
 * @since 0.9
 * @author Les Hazlewood
 */
public class RoleAnnotationMethodInterceptor extends AuthorizingAnnotationMethodInterceptor {

    public RoleAnnotationMethodInterceptor() {
        setAnnotationClass( RequiresRoles.class );
    }

    public RoleAnnotationMethodInterceptor( SecurityManager securityManager ) {
        this();
        setSecurityManager( securityManager );
        init();
    }

    public void assertAuthorized(MethodInvocation mi) throws AuthorizationException {
        RequiresRoles rrAnnotation = (RequiresRoles)getAnnotation( mi );

        String roleId = rrAnnotation.value();

        String[] roles = roleId.split(",");

        if ( roles.length == 1 ) {
            if ( !getSubject().hasRole(roles[0])) {
                String msg = "Calling Subject does not have required role [" + roleId + "].  " +
                         "MethodInvocation denied.";
                throw new UnauthorizedException( msg );
            }
        } else {
            Set<String> rolesSet = new LinkedHashSet<String>( Arrays.asList(roles));
            if ( !getSubject().hasAllRoles(rolesSet)) {
                String msg = "Calling Subject does not have required roles [" + roleId + "].  " +
                         "MethodInvocation denied.";
                throw new UnauthorizedException( msg );
            }
        }
    }
}