| /** |
| * 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.builtin; |
| |
| import java.io.IOException; |
| import java.util.List; |
| |
| import org.apache.hadoop.mapreduce.Job; |
| import org.apache.pig.LoadFuncMetadataWrapper; |
| import org.apache.pig.LoadMetadata; |
| import org.apache.pig.LoadPushDown; |
| import org.apache.pig.impl.logicalLayer.FrontendException; |
| import org.apache.pig.impl.util.JarManager; |
| |
| /** |
| * Wrapper class which will delegate calls to parquet.pig.ParquetLoader |
| */ |
| public class ParquetLoader extends LoadFuncMetadataWrapper implements LoadPushDown { |
| |
| public ParquetLoader() throws FrontendException { |
| this(null); |
| } |
| |
| public ParquetLoader(String requestedSchemaStr) throws FrontendException { |
| try { |
| init(new parquet.pig.ParquetLoader(requestedSchemaStr)); |
| } |
| // if compile time dependency not found at runtime |
| catch (NoClassDefFoundError e) { |
| throw new FrontendException(String.format("Cannot instantiate class %s (%s)", |
| getClass().getName(), "parquet.pig.ParquetLoader"), 2259, e); |
| } |
| } |
| |
| private void init(LoadMetadata loadMetadata) { |
| setLoadFunc(loadMetadata); |
| } |
| |
| @Override |
| public void setLocation(String location, Job job) throws IOException { |
| JarManager.addDependencyJars(job, parquet.Version.class); |
| super.setLocation(location, job); |
| } |
| |
| @Override |
| public List<OperatorSet> getFeatures() { |
| return ((LoadPushDown)super.loadFunc()).getFeatures(); |
| } |
| |
| @Override |
| public RequiredFieldResponse pushProjection(RequiredFieldList requiredFieldList) |
| throws FrontendException { |
| return ((LoadPushDown)super.loadFunc()).pushProjection(requiredFieldList); |
| } |
| |
| } |