| /* |
| * 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.wayang.java.channels; |
| |
| import org.apache.wayang.basic.channels.FileChannel; |
| import org.apache.wayang.basic.data.Tuple2; |
| import org.apache.wayang.core.optimizer.channels.ChannelConversion; |
| import org.apache.wayang.core.optimizer.channels.DefaultChannelConversion; |
| import org.apache.wayang.core.types.DataSetType; |
| import org.apache.wayang.java.operators.JavaCollectOperator; |
| import org.apache.wayang.java.operators.JavaObjectFileSink; |
| import org.apache.wayang.java.operators.JavaObjectFileSource; |
| import org.apache.wayang.java.operators.JavaTsvFileSink; |
| import org.apache.wayang.java.operators.JavaTsvFileSource; |
| import org.apache.wayang.java.platform.JavaPlatform; |
| |
| import java.util.Arrays; |
| import java.util.Collection; |
| |
| /** |
| * {@link ChannelConversion}s for the {@link JavaPlatform}. |
| */ |
| public class ChannelConversions { |
| |
| public static final ChannelConversion STREAM_TO_COLLECTION = new DefaultChannelConversion( |
| StreamChannel.DESCRIPTOR, |
| CollectionChannel.DESCRIPTOR, |
| () -> new JavaCollectOperator<>(DataSetType.createDefault(Void.class)) |
| ); |
| |
| // We could add a COLLECTION_TO_STREAM conversion, but it would probably never be used. |
| |
| public static final ChannelConversion STREAM_TO_HDFS_TSV = new DefaultChannelConversion( |
| StreamChannel.DESCRIPTOR, |
| FileChannel.HDFS_TSV_DESCRIPTOR, |
| () -> new JavaTsvFileSink<>(DataSetType.createDefaultUnchecked(Tuple2.class)) |
| ); |
| |
| public static final ChannelConversion COLLECTION_TO_HDFS_TSV = new DefaultChannelConversion( |
| CollectionChannel.DESCRIPTOR, |
| FileChannel.HDFS_TSV_DESCRIPTOR, |
| () -> new JavaTsvFileSink<>(DataSetType.createDefaultUnchecked(Tuple2.class)) |
| ); |
| |
| public static final ChannelConversion HDFS_TSV_TO_STREAM = new DefaultChannelConversion( |
| FileChannel.HDFS_TSV_DESCRIPTOR, |
| StreamChannel.DESCRIPTOR, |
| () -> new JavaTsvFileSource<>(DataSetType.createDefault(Tuple2.class)) |
| ); |
| |
| public static final ChannelConversion STREAM_TO_HDFS_OBJECT_FILE = new DefaultChannelConversion( |
| StreamChannel.DESCRIPTOR, |
| FileChannel.HDFS_OBJECT_FILE_DESCRIPTOR, |
| () -> new JavaObjectFileSink<>(DataSetType.createDefault(Void.class)) |
| ); |
| |
| public static final ChannelConversion COLLECTION_TO_HDFS_OBJECT_FILE = new DefaultChannelConversion( |
| CollectionChannel.DESCRIPTOR, |
| FileChannel.HDFS_OBJECT_FILE_DESCRIPTOR, |
| () -> new JavaObjectFileSink<>(DataSetType.createDefault(Void.class)) |
| ); |
| |
| public static final ChannelConversion HDFS_OBJECT_FILE_TO_STREAM = new DefaultChannelConversion( |
| FileChannel.HDFS_OBJECT_FILE_DESCRIPTOR, |
| StreamChannel.DESCRIPTOR, |
| () -> new JavaObjectFileSource<>(DataSetType.createDefault(Void.class)) |
| ); |
| |
| public static Collection<ChannelConversion> ALL = Arrays.asList( |
| STREAM_TO_COLLECTION, |
| STREAM_TO_HDFS_OBJECT_FILE, |
| COLLECTION_TO_HDFS_OBJECT_FILE, |
| HDFS_OBJECT_FILE_TO_STREAM, |
| // HDFS_TSV_TO_STREAM, |
| STREAM_TO_HDFS_TSV, |
| COLLECTION_TO_HDFS_TSV |
| ); |
| } |