/*
* Copyright 2004, 2005, 2006 Acegi Technology Pty Limited
*
* 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.springframework.security.access.annotation;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.util.*;
import org.springframework.core.GenericTypeResolver;
import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.security.access.ConfigAttribute;
import org.springframework.security.access.SecurityConfig;
import org.springframework.security.access.method.AbstractFallbackMethodSecurityMetadataSource;
import org.springframework.util.Assert;
/**
* Sources method security metadata from Spring Security's {@link Secured} annotation.
* <p>
* Can also be used with custom security annotations by injecting an
* {@link AnnotationMetadataExtractor}. The annotation type will then be obtained from the
* generic parameter type supplied to this interface
*
* @author Ben Alex
* @author Luke Taylor
*/
@SuppressWarnings({ "unchecked" })
public class SecuredAnnotationSecurityMetadataSource extends
AbstractFallbackMethodSecurityMetadataSource {
private AnnotationMetadataExtractor annotationExtractor;
private Class<? extends Annotation> annotationType;
public SecuredAnnotationSecurityMetadataSource() {
this(new SecuredAnnotationMetadataExtractor());
}
public SecuredAnnotationSecurityMetadataSource(
AnnotationMetadataExtractor annotationMetadataExtractor) {
Assert.notNull(annotationMetadataExtractor, "annotationMetadataExtractor cannot be null");
annotationExtractor = annotationMetadataExtractor;
annotationType = (Class<? extends Annotation>) GenericTypeResolver
.resolveTypeArgument(annotationExtractor.getClass(),
AnnotationMetadataExtractor.class);
Assert.notNull(annotationType, annotationExtractor.getClass().getName()
+ " must supply a generic parameter for AnnotationMetadataExtractor");
}
protected Collection<ConfigAttribute> findAttributes(Class<?> clazz) {
return processAnnotation(AnnotationUtils.findAnnotation(clazz, annotationType));
}
protected Collection<ConfigAttribute> findAttributes(Method method,
Class<?> targetClass) {
return processAnnotation(AnnotationUtils.findAnnotation(method, annotationType));
}
public Collection<ConfigAttribute> getAllConfigAttributes() {
return null;
}
private Collection<ConfigAttribute> processAnnotation(Annotation a) {
if (a == null) {
return null;
}
return annotationExtractor.extractAttributes(a);
}
}
class SecuredAnnotationMetadataExtractor implements AnnotationMetadataExtractor<Secured> {
public Collection<ConfigAttribute> extractAttributes(Secured secured) {
String[] attributeTokens = secured.value();
List<ConfigAttribute> attributes = new ArrayList<ConfigAttribute>(
attributeTokens.length);
for (String token : attributeTokens) {
attributes.add(new SecurityConfig(token));
}
return attributes;
}
}