/** * Copyright 2013 ARRIS, Inc. * * Licensed 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 parquet.tools.command; import java.io.PrintWriter; import org.apache.commons.cli.CommandLine; import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.fs.Path; import parquet.hadoop.ParquetFileReader; import parquet.hadoop.metadata.ParquetMetadata; import parquet.tools.util.MetadataUtils; import parquet.tools.util.PrettyPrintWriter; import parquet.tools.util.PrettyPrintWriter.WhiteSpaceHandler; public class ShowMetaCommand extends ArgsOnlyCommand { public static final String TABS = " "; public static final int BLOCK_BUFFER_SIZE = 64 * 1024; public static final String[] USAGE = new String[] { "<input>", "where <input> is the parquet file to print to stdout" }; public ShowMetaCommand() { super(1, 1); } @Override public String[] getUsageDescription() { return USAGE; } @Override public void execute(CommandLine options) throws Exception { super.execute(options); String[] args = options.getArgs(); String input = args[0]; Configuration conf = new Configuration(); ParquetMetadata metaData = ParquetFileReader.readFooter(conf, new Path(input)); PrettyPrintWriter out = PrettyPrintWriter.stdoutPrettyPrinter() .withAutoColumn() .withAutoCrop() .withWhitespaceHandler(WhiteSpaceHandler.COLLAPSE_WHITESPACE) .withColumnPadding(1) .build(); MetadataUtils.showDetails(out, metaData); out.flushColumns(); } }