| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.sling.jcr.resource.internal; |
| |
| import java.util.concurrent.atomic.AtomicReference; |
| |
| import javax.jcr.RepositoryException; |
| import javax.jcr.Session; |
| |
| import org.apache.sling.api.resource.external.URIProvider; |
| import org.apache.sling.commons.classloader.DynamicClassLoaderManager; |
| |
| /** |
| * This is a helper class used to pass several services/data to the resource |
| * and value map implementations. |
| */ |
| public class HelperData { |
| |
| private static final URIProvider[] EMPTY_URLPROVIDERS = new URIProvider[0]; |
| |
| private final AtomicReference<DynamicClassLoaderManager> dynamicClassLoaderManagerReference; |
| private final AtomicReference<URIProvider[]> uriProviderReference; |
| |
| private volatile String[] namespacePrefixes; |
| |
| public HelperData(final AtomicReference<DynamicClassLoaderManager> dynamicClassLoaderManagerReference, AtomicReference<URIProvider[]> uriProviderReference) { |
| this.dynamicClassLoaderManagerReference = dynamicClassLoaderManagerReference; |
| this.uriProviderReference = uriProviderReference; |
| } |
| |
| public String[] getNamespacePrefixes(final Session session) |
| throws RepositoryException { |
| if ( this.namespacePrefixes == null ) { |
| this.namespacePrefixes = session.getNamespacePrefixes(); |
| } |
| return this.namespacePrefixes; |
| } |
| |
| public ClassLoader getDynamicClassLoader() { |
| final DynamicClassLoaderManager dclm = this.dynamicClassLoaderManagerReference.get(); |
| if ( dclm == null ) { |
| return null; |
| } |
| return dclm.getDynamicClassLoader(); |
| } |
| |
| public URIProvider[] getURIProviders() { |
| URIProvider[] ups = this.uriProviderReference.get(); |
| if ( ups == null) { |
| ups = EMPTY_URLPROVIDERS; |
| } |
| return ups; |
| } |
| } |