org.codice.ddf.configuration.AbsolutePathResolver.java Source code

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Here is the source code for org.codice.ddf.configuration.AbsolutePathResolver.java

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/**
 * Copyright (c) Codice Foundation
 *
 * <p>This is free software: you can redistribute it and/or modify it under the terms of the GNU
 * Lesser General Public License as published by the Free Software Foundation, either version 3 of
 * the License, or any later version.
 *
 * <p>This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details. A copy of the GNU Lesser General Public
 * License is distributed along with this program and can be found at
 * <http://www.gnu.org/licenses/lgpl.html>.
 */
package org.codice.ddf.configuration;

import java.io.File;
import java.nio.file.Path;
import java.nio.file.Paths;
import javax.annotation.Nullable;
import org.apache.commons.lang.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class AbsolutePathResolver {

    private static final Logger LOGGER = LoggerFactory.getLogger(AbsolutePathResolver.class);

    private final String path;

    public AbsolutePathResolver(@Nullable String path) {
        this.path = path;
    }

    /**
     * This method will attempt to convert the already given path into an absolute path: first using
     * the system property {@code ddf.home} and then using {@code Path}'s {@code toAbsolutePath}'s
     * method
     *
     * @return Absolute path as a String
     */
    public String getPath() {
        if (System.getProperty("ddf.home") == null) {
            LOGGER.warn("System property ddf.home is not set");
        }
        return getPath(System.getProperty("ddf.home"));
    }

    /**
     * This method will attempt to convert the already given path into an absolute path: first by
     * appending the given {@code rootPath}, then by using {@code Path}'s {@code toAbsolutePath}'s
     * method
     *
     * @param rootPath String to append to path
     * @return Absolute path as a String
     */
    public String getPath(String rootPath) {
        if (path == null) {
            return null;
        }

        boolean trailingSeparator = path.endsWith(File.separator);

        Path absolutePath = Paths.get(path);

        if (!absolutePath.isAbsolute()) {
            if (StringUtils.isNotBlank(rootPath)) {
                absolutePath = Paths.get(rootPath, path);
            } else {
                LOGGER.debug("Root path is blank. Resolving relative path [{}] to: {}", path,
                        absolutePath.toAbsolutePath());
            }
        }

        String absolutePathStr = absolutePath.toAbsolutePath().toString();
        return trailingSeparator ? absolutePathStr + File.separator : absolutePathStr;
    }
}