Java Path File Name nio getLatestUpgradeScriptName(Path upgradeScriptsDir)

Description

get Latest Upgrade Script Name

License

Apache License

Declaration

private static String getLatestUpgradeScriptName(Path upgradeScriptsDir) throws IOException 

Method Source Code

//package com.java2s;
/*//from w  w w.  j a  v a  2s.  co m
 * Copyright 2014-2015 Red Hat 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.
 *
 */

import java.io.IOException;

import java.nio.file.DirectoryStream;
import java.nio.file.Files;
import java.nio.file.Path;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public class Main {
    private static String getLatestUpgradeScriptName(Path upgradeScriptsDir) throws IOException {
        List<String> fileNames = new ArrayList<>();
        DirectoryStream.Filter<Path> fileFilter = new DirectoryStream.Filter<Path>() {
            public boolean accept(Path file) throws IOException {
                return !Files.isDirectory(file);
            }
        };
        try (DirectoryStream<Path> directoryStream = Files.newDirectoryStream(upgradeScriptsDir, fileFilter)) {
            for (Path path : directoryStream) {
                // in schema_version table script name contains "upgrade/" prefix
                fileNames.add(path.subpath(path.getNameCount() - 2, path.getNameCount()).toString());
            }
        } finally {
        }
        Collections.sort(fileNames);
        return fileNames.get(fileNames.size() - 1);
    }
}

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