| /* |
| * 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.scripting.java.impl; |
| |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.net.MalformedURLException; |
| import java.net.URL; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.Set; |
| |
| import org.apache.sling.api.SlingException; |
| import org.apache.sling.api.resource.Resource; |
| import org.apache.sling.api.resource.ResourceMetadata; |
| import org.apache.sling.api.resource.ResourceResolver; |
| import org.apache.sling.commons.compiler.JavaCompiler; |
| import org.apache.sling.commons.compiler.Options; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * The <code>SlingIOProvider</code> |
| */ |
| public class SlingIOProvider { |
| |
| /** Default logger */ |
| private final Logger logger = LoggerFactory.getLogger(SlingIOProvider.class); |
| |
| private ThreadLocal<ResourceResolver> requestResourceResolver; |
| |
| private final JavaCompiler compiler; |
| |
| /** Options for compilation. */ |
| private final CompilerOptions options; |
| |
| /** Options for compilation including the force compile option. */ |
| private final CompilerOptions forceCompileOptions; |
| |
| /** |
| * Servlet cache. |
| */ |
| private final ServletCache servletCache = new ServletCache(); |
| |
| /** |
| * Constructor. |
| */ |
| SlingIOProvider(final JavaCompiler compiler, |
| final CompilerOptions options) { |
| this.requestResourceResolver = new ThreadLocal<ResourceResolver>(); |
| this.compiler = compiler; |
| this.options = options; |
| this.forceCompileOptions = CompilerOptions.copyOptions(options); |
| this.forceCompileOptions.put(Options.KEY_FORCE_COMPILATION, true); |
| } |
| |
| void destroy() { |
| this.servletCache.destroy(); |
| } |
| |
| void setRequestResourceResolver(ResourceResolver resolver) { |
| requestResourceResolver.set(resolver); |
| } |
| |
| void resetRequestResourceResolver() { |
| requestResourceResolver.remove(); |
| } |
| |
| // ---------- IOProvider interface ----------------------------------------- |
| |
| public JavaCompiler getCompiler() { |
| return this.compiler; |
| } |
| |
| public CompilerOptions getOptions() { |
| return this.options; |
| } |
| |
| public CompilerOptions getForceCompileOptions() { |
| return this.forceCompileOptions; |
| } |
| |
| public ServletCache getServletCache() { |
| return this.servletCache; |
| } |
| |
| /** |
| * Returns an InputStream for the file name which is looked up with the |
| * ResourceProvider and retrieved from the Resource if the StreamProvider |
| * interface is implemented. |
| */ |
| public InputStream getInputStream(String fileName) |
| throws FileNotFoundException, IOException { |
| try { |
| final Resource resource = getResourceInternal(fileName); |
| if (resource == null) { |
| throw new FileNotFoundException("Cannot find " + fileName); |
| } |
| |
| final InputStream stream = resource.adaptTo(InputStream.class); |
| if (stream == null) { |
| throw new FileNotFoundException("Cannot find " + fileName); |
| } |
| |
| return stream; |
| |
| } catch (SlingException se) { |
| throw (IOException) new IOException( |
| "Failed to get InputStream for " + fileName).initCause(se); |
| } |
| } |
| |
| /** |
| * Returns the value of the last modified meta data field of the resource |
| * found at file name or zero if the meta data field is not set. If the |
| * resource does not exist or an error occurrs finding the resource, -1 is |
| * returned. |
| */ |
| public long lastModified(String fileName) { |
| try { |
| final Resource resource = getResourceInternal(fileName); |
| if (resource != null) { |
| final ResourceMetadata meta = resource.getResourceMetadata(); |
| final long modTime = meta.getModificationTime(); |
| return (modTime > 0) ? modTime : 0; |
| } |
| |
| } catch (SlingException se) { |
| logger.error("Cannot get last modification time for " + fileName, se); |
| } |
| |
| // fallback to "non-existant" in case of problems |
| return -1; |
| } |
| |
| public URL getURL(String path) throws MalformedURLException { |
| try { |
| final Resource resource = getResourceInternal(path); |
| return resource != null ? resource.adaptTo(URL.class) : null; |
| } catch (SlingException se) { |
| throw (MalformedURLException) new MalformedURLException( |
| "Cannot get URL for " + path).initCause(se); |
| } |
| } |
| |
| public Set<String> getResourcePaths(final String path) { |
| final Set<String> paths = new HashSet<String>(); |
| try { |
| final Resource resource = getResourceInternal(path); |
| if (resource != null) { |
| final Iterator<Resource> entries = resource.getResourceResolver().listChildren(resource); |
| while (entries.hasNext()) { |
| paths.add(entries.next().getPath()); |
| } |
| } |
| } catch (SlingException se) { |
| logger.warn("Unable to get resource at path " + path, se); |
| } |
| |
| return paths.isEmpty() ? null : paths; |
| } |
| |
| private Resource getResourceInternal(String path) throws SlingException { |
| ResourceResolver resolver = requestResourceResolver.get(); |
| if (resolver != null) { |
| return resolver.getResource(path); |
| } |
| |
| return null; |
| } |
| |
| } |