com.sap.hana.datalake.files.committers.manifest.EntryStatus Maven / Gradle / Ivy

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An implementation of org.apache.hadoop.fs.FileSystem targeting SAP HANA Data Lake Files.

There is a newer version: 3.0.27

/*
 * 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 com.sap.hana.datalake.files.committers.manifest;

import javax.annotation.Nullable;

import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.fs.FileStatus;

/**
 * Status of a file or dir entry, designed to be marshalled as
 * an integer -the ordinal value of the enum is the
 * wire value.
 */
@InterfaceAudience.Private
@InterfaceStability.Unstable
enum EntryStatus {

    unknown,
    not_found,
    file,
    dir,
    created_dir;

    /**
     * Go from a marshalled type to a status value.
     * Any out of range value is converted to unknown.
     * @param type type
     * @return the status value.
     */
    public static com.sap.hana.datalake.files.committers.manifest.EntryStatus toEntryStatus(int type) {
        switch (type) {
            case 1:
                return not_found;
            case 2:
                return file;
            case 3:
                return dir;
            case 4:
                return created_dir;
            case 0:
            default:
                return unknown;
        }
    }


    /**
     * Go from the result of a getFileStatus call or
     * listing entry to a status.
     * A null argument is mapped to {@link #not_found}
     * @param st file status
     * @return the status enum.
     */
    public static com.sap.hana.datalake.files.committers.manifest.EntryStatus toEntryStatus(@Nullable FileStatus st) {

        if (st == null) {
            return not_found;
        }
        if (st.isDirectory()) {
            return dir;
        }
        if (st.isFile()) {
            return file;
        }
        return unknown;
    }


}