grails.plugin.springsecurity.acl.AclAutoProxyCreator.java Source code

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Here is the source code for grails.plugin.springsecurity.acl.AclAutoProxyCreator.java

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/* Copyright 2009-2014 SpringSource.
 *
 * 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 grails.plugin.springsecurity.acl;

import grails.util.GrailsNameUtils;

import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Collection;
import org.codehaus.groovy.grails.compiler.injection.GrailsAwareClassLoader;
import org.codehaus.groovy.grails.commons.ControllerArtefactHandler;
import org.codehaus.groovy.grails.commons.GrailsApplication;
import org.codehaus.groovy.grails.commons.GrailsClass;
import org.codehaus.groovy.grails.commons.GrailsClassUtils;
import org.codehaus.groovy.grails.commons.ServiceArtefactHandler;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.aop.TargetSource;
import org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.security.access.prepost.PostAuthorize;
import org.springframework.security.access.prepost.PostFilter;
import org.springframework.security.access.prepost.PreAuthorize;
import org.springframework.security.access.prepost.PreFilter;

/**
 * Based on https://github.com/alkemist/grails-aop-reloading-fix/blob/master/src/groovy/grails/plugin/aopreloadingfix/ClassLoaderPerProxyGroovyAwareAspectJAwareAdvisorAutoProxyCreator.groovy
 * and https://github.com/grails-plugins/grails-spring-security-acl/pull/8
 *
 * @author Luke Daley
 * @author <a href='mailto:burt@burtbeckwith.com'>Burt Beckwith</a>
 * @author Predrag Knezevic
 */
public class AclAutoProxyCreator extends AbstractAutoProxyCreator implements InitializingBean {

    private static final long serialVersionUID = 1;

    protected final Logger log = LoggerFactory.getLogger(getClass());

    protected GrailsApplication grailsApplication;
    protected ClassLoader baseLoader;
    protected Collection<String> serviceBeanNames = new ArrayList<String>();

    @SuppressWarnings("unchecked")
    protected final Class<? extends Annotation>[] ANNOTATIONS = new Class[] {
            grails.plugin.springsecurity.annotation.Secured.class,
            org.springframework.security.access.annotation.Secured.class, PreAuthorize.class, PreFilter.class,
            PostAuthorize.class, PostFilter.class };

    @Override
    protected Object[] getAdvicesAndAdvisorsForBean(final Class<?> beanClass, final String beanName,
            final TargetSource customTargetSource) throws BeansException {
        if (serviceBeanNames.contains(beanName) || shouldProxy(beanClass, beanName)) {
            return PROXY_WITHOUT_ADDITIONAL_INTERCEPTORS;
        }
        return DO_NOT_PROXY;
    }

    protected boolean beanIsAnnotated(final Class<?> c) {
        for (Class<? extends Annotation> annotation : ANNOTATIONS) {
            if (c.isAnnotationPresent(annotation)) {
                return true;
            }

            for (Method method : c.getMethods()) {
                if (method.isAnnotationPresent(annotation)) {
                    return true;
                }
            }
        }
        return false;
    }

    @Override
    protected boolean shouldProxyTargetClass(Class<?> beanClass, String beanName) {
        return serviceBeanNames.contains(beanName) || super.shouldProxyTargetClass(beanClass, beanName);
    }

    @Override
    protected Object getCacheKey(Class<?> beanClass, String beanName) {
        return beanClass.hashCode() + "_" + beanName;
    }

    protected boolean shouldProxy(final Class<?> c, final String beanName) {

        if (grailsApplication.isArtefactOfType(ControllerArtefactHandler.TYPE, c)) {
            // pre and post annotations don't make sense, and @Secured is handled by url checks
            return false;
        }

        boolean hasSpringSecurityACL = GrailsClassUtils.isStaticProperty(c, "springSecurityACL");
        if (hasSpringSecurityACL || beanIsAnnotated(c)) {
            if (log.isDebugEnabled())
                log.debug("Secure '{0}' instances of {1}", new Object[] { beanName, c.getName() });
            return true;
        }
        return false;
    }

    @Override
    protected Object createProxy(Class<?> beanClass, String beanName, Object[] specificInterceptors,
            TargetSource targetSource) {
        try {
            setProxyClassLoader(new GrailsAwareClassLoader(baseLoader, null, false));
            return super.createProxy(beanClass, beanName, specificInterceptors, targetSource);
        } finally {
            setProxyClassLoader(baseLoader);
        }
    }

    @Override
    public void setBeanClassLoader(final ClassLoader classLoader) {
        super.setBeanClassLoader(classLoader);
        baseLoader = classLoader;
    }

    public void afterPropertiesSet() throws Exception {
        for (GrailsClass serviceClass : grailsApplication.getArtefacts(ServiceArtefactHandler.TYPE)) {
            String beanName = GrailsNameUtils.getPropertyNameRepresentation(serviceClass.getClazz().getName());
            if (shouldProxy(serviceClass.getClazz(), beanName)) {
                serviceBeanNames.add(beanName);
            }
        }
    }

    /**
     * Dependency injection for the application.
     * @param application the application
     */
    public void setGrailsApplication(GrailsApplication application) {
        grailsApplication = application;
    }
}