001/*
002 * Copyright 2010-2013 JetBrains s.r.o.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.jetbrains.jet.utils;
018
019import com.intellij.openapi.util.SystemInfo;
020import com.intellij.openapi.util.text.StringUtil;
021import com.intellij.util.io.URLUtil;
022import org.jetbrains.annotations.NotNull;
023
024import java.net.MalformedURLException;
025import java.net.URL;
026
027/*
028 * This code is essentially copied from IntelliJ IDEA's VfsUtil, and slightly restructured
029 */
030public class KotlinVfsUtil {
031    private static final String FILE = "file";
032    private static final String JAR = "jar";
033    private static final String PROTOCOL_DELIMITER = ":";
034
035    @NotNull
036    public static String convertFromUrl(@NotNull URL url) throws MalformedURLException {
037        String protocol = url.getProtocol();
038        String path = url.getPath();
039        if (JAR.equals(protocol)) {
040            if (StringUtil.startsWithConcatenationOf(path, FILE, PROTOCOL_DELIMITER)) {
041                URL subURL = new URL(path);
042                path = subURL.getPath();
043            }
044            else {
045                throw new MalformedURLException("Can't parse url: " + url.toExternalForm());
046            }
047        }
048        if (SystemInfo.isWindows || SystemInfo.isOS2) {
049            while (path.length() > 0 && path.charAt(0) == '/') {
050                path = path.substring(1, path.length());
051            }
052        }
053
054        path = URLUtil.unescapePercentSequences(path);
055        return protocol + "://" + path;
056    }
057
058    private KotlinVfsUtil() {}
059}