Repository: mahout Updated Branches: refs/heads/branch-0.14.0 e0573de33 -> 410ed16af
http://git-wip-us.apache.org/repos/asf/mahout/blob/410ed16a/community/mahout-mr/mr/src/main/java/org/apache/mahout/common/iterator/sequencefile/PathFilters.java ---------------------------------------------------------------------- diff --git a/community/mahout-mr/mr/src/main/java/org/apache/mahout/common/iterator/sequencefile/PathFilters.java b/community/mahout-mr/mr/src/main/java/org/apache/mahout/common/iterator/sequencefile/PathFilters.java new file mode 100644 index 0000000..19f78b5 --- /dev/null +++ b/community/mahout-mr/mr/src/main/java/org/apache/mahout/common/iterator/sequencefile/PathFilters.java @@ -0,0 +1,81 @@ +/** + * 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.mahout.common.iterator.sequencefile; + +import org.apache.hadoop.fs.Path; +import org.apache.hadoop.fs.PathFilter; + +/** + * Supplies some useful and repeatedly-used instances of {@link PathFilter}. + */ +public final class PathFilters { + + private static final PathFilter PART_FILE_INSTANCE = new PathFilter() { + @Override + public boolean accept(Path path) { + String name = path.getName(); + return name.startsWith("part-") && !name.endsWith(".crc"); + } + }; + + /** + * Pathfilter to read the final clustering file. + */ + private static final PathFilter CLUSTER_FINAL = new PathFilter() { + @Override + public boolean accept(Path path) { + String name = path.getName(); + return name.startsWith("clusters-") && name.endsWith("-final"); + } + }; + + private static final PathFilter LOGS_CRC_INSTANCE = new PathFilter() { + @Override + public boolean accept(Path path) { + String name = path.getName(); + return !(name.endsWith(".crc") || name.startsWith(".") || name.startsWith("_")); + } + }; + + private PathFilters() { + } + + /** + * @return {@link PathFilter} that accepts paths whose file name starts with "part-". Excludes + * ".crc" files. + */ + public static PathFilter partFilter() { + return PART_FILE_INSTANCE; + } + + /** + * @return {@link PathFilter} that accepts paths whose file name starts with "part-" and ends with "-final". + */ + public static PathFilter finalPartFilter() { + return CLUSTER_FINAL; + } + + /** + * @return {@link PathFilter} that rejects paths whose file name starts with "_" (e.g. Cloudera + * _SUCCESS files or Hadoop _logs), or "." (e.g. local hidden files), or ends with ".crc" + */ + public static PathFilter logsCRCFilter() { + return LOGS_CRC_INSTANCE; + } + +}
