| /* |
| * 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.sysds.runtime.io; |
| |
| import java.io.IOException; |
| |
| import org.apache.sysds.common.Types.ValueType; |
| import org.apache.sysds.runtime.DMLRuntimeException; |
| import org.apache.sysds.runtime.matrix.data.FrameBlock; |
| |
| /** |
| * Base class for all format-specific frame writers. Every writer is required to implement the basic |
| * write functionality but might provide additional custom functionality. Any non-default parameters |
| * (e.g., CSV read properties) should be passed into custom constructors. There is also a factory |
| * for creating format-specific writers. |
| * |
| */ |
| public abstract class FrameWriter |
| { |
| |
| public abstract void writeFrameToHDFS( FrameBlock src, String fname, long rlen, long clen ) |
| throws IOException, DMLRuntimeException; |
| |
| public static FrameBlock[] createFrameBlocksForReuse( ValueType[] schema, String[] names, long rlen ) { |
| FrameBlock frameBlock[] = new FrameBlock[1]; |
| frameBlock[0] = new FrameBlock(schema, names); |
| return frameBlock; |
| } |
| |
| public static FrameBlock getFrameBlockForReuse( FrameBlock[] blocks) //TODO do we need this function? |
| { |
| return blocks[ 0 ]; |
| } |
| } |