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     */
019    package org.tynamo.shiro.extension.authz.annotations.utils.casters.method;
020    
021    import org.apache.shiro.authz.annotation.*;
022    
023    import java.lang.annotation.Annotation;
024    
025    
026    /**
027     * Class for accepting
028     * {@link org.tynamo.shiro.extension.authz.annotations.utils.casters.method.MethodAnnotationCasterVisitor}
029     * visitors.
030     * <p/>
031     * Provides call the desired method of the visitor, depending on the annotation type.
032     *
033     * @see org.tynamo.shiro.extension.authz.annotations.utils.casters.method.MethodAnnotationCasterVisitor
034     */
035    public class MethodAnnotationCaster
036    {
037    
038            private static final MethodAnnotationCaster instance = new MethodAnnotationCaster();
039    
040            private MethodAnnotationCaster()
041            {
042            }
043    
044            public void accept(MethodAnnotationCasterVisitor visitor, Annotation annotation)
045            {
046                    if (annotation instanceof RequiresPermissions)
047                    {
048    
049                            visitor.visitRequiresPermissions((RequiresPermissions) annotation);
050    
051                    } else if (annotation instanceof RequiresRoles)
052                    {
053    
054                            visitor.visitRequiresRoles((RequiresRoles) annotation);
055    
056                    } else if (annotation instanceof RequiresUser)
057                    {
058    
059                            visitor.visitRequiresUser((RequiresUser) annotation);
060    
061                    } else if (annotation instanceof RequiresGuest)
062                    {
063    
064                            visitor.visitRequiresGuest((RequiresGuest) annotation);
065    
066                    } else if (annotation instanceof RequiresAuthentication)
067                    {
068    
069                            visitor.visitRequiresAuthentication((RequiresAuthentication) annotation);
070    
071                    } else
072                    {
073    
074                            visitor.visitNotFound();
075    
076                    }
077            }
078    
079            public static MethodAnnotationCaster getInstance()
080            {
081                    return instance;
082            }
083    }