src/jdk.internal.le/share/classes/jdk/internal/org/jline/reader/ConfigurationPath.java

/*
 * Copyright (c) 2002-2019, the original author or authors.
 *
 * This software is distributable under the BSD license. See the terms of the
 * BSD license in the documentation provided with this software.
 *
 * https://opensource.org/licenses/BSD-3-Clause
 */
package jdk.internal.org.jline.reader;

import java.io.IOException;
import java.nio.file.Path;

public class ConfigurationPath {
    private Path appConfig;
    private Path userConfig;

    /**
     * Configuration class constructor.
     * @param appConfig   Application configuration directory
     * @param userConfig  User private configuration directory
     */
    public ConfigurationPath(Path appConfig, Path userConfig) {
        this.appConfig = appConfig;
        this.userConfig = userConfig;
    }

    /**
     * Search configuration file first from userConfig and then appConfig directory. Returns null if file is not found.
     * @param  name    Configuration file name.
     * @return         Configuration file.
     *
     */
    public Path getConfig(String name) {
        Path out = null;
        if (userConfig != null && userConfig.resolve(name).toFile().exists()) {
            out = userConfig.resolve(name);
        } else if (appConfig != null && appConfig.resolve(name).toFile().exists()) {
            out = appConfig.resolve(name);
        }
        return out;
    }

    /**
     * Search configuration file from userConfig directory. Returns null if file is not found.
     * @param  name    Configuration file name.
     * @return         Configuration file.
     * @throws         IOException   When we do not have read access to the file or directory.
     *
     */
    public Path getUserConfig(String name) throws IOException {
        return getUserConfig(name, false);
    }

    /**
     * Search configuration file from userConfig directory. Returns null if file is not found.
     * @param  name    Configuration file name
     * @param  create  When true configuration file is created if not found.
     * @return         Configuration file.
     * @throws         IOException   When we do not have read/write access to the file or directory.
     */
    public Path getUserConfig(String name, boolean create) throws IOException {
        Path out = null;
        if (userConfig != null) {
            if (!userConfig.resolve(name).toFile().exists() && create) {
                userConfig.resolve(name).toFile().createNewFile();
            }
            if (userConfig.resolve(name).toFile().exists()) {
                out = userConfig.resolve(name);
            }
        }
        return out;
    }

}