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99 lines
3.0 KiB
99 lines
3.0 KiB
//==============================================================================
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//
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// Copyright (c) 2016-
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// Authors:
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// * Joachim Klein <klein@tcs.inf.tu-dresden.de> (TU Dresden)
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//
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//------------------------------------------------------------------------------
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//
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// This file is part of PRISM.
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//
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// PRISM is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// PRISM is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with PRISM; if not, write to the Free Software Foundation,
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// Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//
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//==============================================================================
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package common;
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import java.io.File;
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import java.io.IOException;
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import java.nio.file.Path;
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import parser.ast.ModulesFile;
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import parser.ast.PropertiesFile;
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/**
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* Static helpers for dealing with paths.
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*/
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public class PathUtil
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{
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/**
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* Returns the absolute path for the directory containing
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* the argument file. Returns {@code null} on error, e.g.,
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* if the file does not exist.
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*/
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public static File getDirectoryFromFile(File file) {
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return getDirectoryFromFile(file.toPath()).toFile();
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}
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/**
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* Returns the absolute path for the directory containing
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* the argument file. Returns {@code null} on error, e.g.,
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* if the file does not exist.
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*/
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public static Path getDirectoryFromFile(Path filePath) {
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try {
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return filePath.toRealPath().getParent();
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} catch (IOException e) {
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// E.g., file does not exist
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return null;
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}
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}
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/**
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* Returns the path for the directory that is used for loading
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* resources (e.g. a HOA automata file) in a property,
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* extracting locations from the ModulesFile and PropertiesFile.
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* <br>
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* The location of the properties file is preferred, then the location
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* of the modules file. If there is no location, {@code null} is returned
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* and should be treated as "current working directory".
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*/
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public static Path getDirectoryForRelativePropertyResource(ModulesFile mf, PropertiesFile pf)
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{
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if (pf != null && pf.getLocation() != null) {
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return getDirectoryFromFile(pf.getLocation());
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}
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if (mf != null && mf.getLocation() != null) {
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return getDirectoryFromFile(mf.getLocation());
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}
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return null;
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}
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/**
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* Resolves path2 relative to path1 (which has to point to a directory).
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* If path2 is absolute, path1 is ignored.
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* If path1 is {@code null}, resolution happens relative
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* to the current working directory.
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*/
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public static Path resolvePath(Path path1, Path path2) {
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if (path1 == null) {
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path1 = new File(".").toPath();
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}
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return path1.resolve(path2);
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}
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}
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