| /* |
| * 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.pig.parser; |
| |
| import java.io.IOException; |
| import java.net.URI; |
| import java.net.URISyntaxException; |
| |
| import org.apache.pig.PigServer; |
| import org.apache.pig.tools.DownloadResolver; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.pig.backend.hadoop.datastorage.ConfigurationUtil; |
| import org.apache.pig.backend.hadoop.executionengine.shims.HadoopShims; |
| import org.apache.hadoop.fs.Path; |
| |
| public class RegisterResolver { |
| |
| private PigServer pigServer; |
| |
| public RegisterResolver(PigServer pigServer) { |
| this.pigServer = pigServer; |
| } |
| |
| /** |
| * @param path |
| * @param scriptingLang |
| * @param namespace |
| * @throws IOException |
| */ |
| public void parseRegister(String path, String scriptingLang, String namespace) throws IOException { |
| try { |
| URI uri = new URI(path); |
| if (resolvesToJar(uri)) { |
| if (scriptingLang != null || namespace != null) { |
| throw new ParserException("Cannot register a jar with a scripting language or namespace"); |
| } |
| URI[] uriList = resolve(uri); |
| for (URI jarUri : uriList) { |
| pigServer.registerJar(jarUri.toString()); |
| } |
| } else { |
| pigServer.registerCode(path, scriptingLang, namespace); |
| } |
| } catch (URISyntaxException e) { |
| throw new ParserException("URI " + path + " is incorrect.", e); |
| } |
| } |
| |
| /** |
| * @param uri |
| * @return List of URIs |
| * @throws IOException |
| */ |
| public URI[] resolve(URI uri) throws IOException { |
| String scheme = uri.getScheme(); |
| if (scheme != null) { |
| scheme = scheme.toLowerCase(); |
| if (scheme.equals("ivy")) { |
| DownloadResolver downloadResolver = DownloadResolver.getInstance(); |
| return downloadResolver.downloadArtifact(uri, pigServer); |
| } |
| if (!hasFileSystemImpl(uri)) { |
| throw new ParserException("Invalid Scheme: " + uri.getScheme()); |
| } |
| } |
| return new URI[] { uri }; |
| } |
| |
| /** |
| * @param uri |
| * @return True if the uri has valid file system implementation |
| */ |
| private boolean hasFileSystemImpl(URI uri) { |
| Configuration conf = ConfigurationUtil.toConfiguration(pigServer.getPigContext().getProperties(), true); |
| return HadoopShims.hasFileSystemImpl(new Path(uri), conf); |
| } |
| |
| /** |
| * @param uri |
| * @return True if the uri is a jar or an ivy coordinate |
| */ |
| private boolean resolvesToJar(URI uri) { |
| String scheme = uri.getScheme(); |
| return (uri.toString().endsWith("jar") || scheme != null && scheme.toLowerCase().equals("ivy")); |
| } |
| |
| } |