| /** |
| * 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.crunch.io.text; |
| |
| import com.google.common.collect.Maps; |
| import org.apache.avro.Schema; |
| import org.apache.crunch.SourceTarget; |
| import org.apache.crunch.Target; |
| import org.apache.crunch.io.FileNamingScheme; |
| import org.apache.crunch.io.FormatBundle; |
| import org.apache.crunch.io.SequentialFileNamingScheme; |
| import org.apache.crunch.io.impl.FileTargetImpl; |
| import org.apache.crunch.types.Converter; |
| import org.apache.crunch.types.PTableType; |
| import org.apache.crunch.types.PType; |
| import org.apache.crunch.types.avro.AvroTextOutputFormat; |
| import org.apache.crunch.types.avro.AvroType; |
| import org.apache.crunch.types.avro.AvroTypeFamily; |
| import org.apache.crunch.types.writable.WritableType; |
| import org.apache.crunch.types.writable.WritableTypeFamily; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.io.Text; |
| import org.apache.hadoop.mapreduce.Job; |
| import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat; |
| import org.apache.hadoop.mapreduce.lib.output.TextOutputFormat; |
| |
| import java.util.Map; |
| |
| public class TextFileTarget extends FileTargetImpl { |
| private static Class<? extends FileOutputFormat> getOutputFormat(PType<?> ptype) { |
| if (ptype.getFamily().equals(AvroTypeFamily.getInstance())) { |
| return AvroTextOutputFormat.class; |
| } else { |
| return TextOutputFormat.class; |
| } |
| } |
| |
| private final Map<String, String> extraConf = Maps.newHashMap(); |
| |
| public <T> TextFileTarget(String path) { |
| this(new Path(path)); |
| } |
| |
| public <T> TextFileTarget(Path path) { |
| this(path, SequentialFileNamingScheme.getInstance()); |
| } |
| |
| public <T> TextFileTarget(Path path, FileNamingScheme fileNamingScheme) { |
| super(path, null, fileNamingScheme); |
| } |
| |
| @Override |
| public Path getPath() { |
| return path; |
| } |
| |
| @Override |
| public String toString() { |
| return "Text(" + path + ")"; |
| } |
| |
| @Override |
| public Target outputConf(String key, String value) { |
| extraConf.put(key, value); |
| return this; |
| } |
| |
| @Override |
| public void configureForMapReduce(Job job, PType<?> ptype, Path outputPath, String name) { |
| Converter converter = ptype.getConverter(); |
| Class keyClass = converter.getKeyClass(); |
| Class valueClass = converter.getValueClass(); |
| FormatBundle fb = FormatBundle.forOutput(getOutputFormat(ptype)); |
| for (Map.Entry<String, String> e : extraConf.entrySet()) { |
| fb.set(e.getKey(), e.getValue()); |
| } |
| configureForMapReduce(job, keyClass, valueClass, fb, outputPath, name); |
| } |
| |
| @Override |
| public <T> SourceTarget<T> asSourceTarget(PType<T> ptype) { |
| if (!isTextCompatible(ptype)) { |
| return null; |
| } |
| if (ptype instanceof PTableType) { |
| return new TextFileTableSourceTarget(path, (PTableType) ptype).fileSystem(getFileSystem()); |
| } |
| return new TextFileSourceTarget<T>(path, ptype).fileSystem(getFileSystem()); |
| } |
| |
| private <T> boolean isTextCompatible(PType<T> ptype) { |
| if (AvroTypeFamily.getInstance().equals(ptype.getFamily())) { |
| AvroType<T> at = (AvroType<T>) ptype; |
| if (at.getSchema().equals(Schema.create(Schema.Type.STRING))) { |
| return true; |
| } |
| } else if (WritableTypeFamily.getInstance().equals(ptype.getFamily())) { |
| if (ptype instanceof PTableType) { |
| PTableType ptt = (PTableType) ptype; |
| return isText(ptt.getKeyType()) && isText(ptt.getValueType()); |
| } else { |
| return isText(ptype); |
| } |
| } |
| return false; |
| } |
| |
| private <T> boolean isText(PType<T> wtype) { |
| return Text.class.equals(((WritableType) wtype).getSerializationClass()); |
| } |
| } |