| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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. |
| */ |
| package org.apache.commons.vfs2.provider.local; |
| |
| import org.apache.commons.vfs2.FileName; |
| import org.apache.commons.vfs2.FileSystemException; |
| import org.apache.commons.vfs2.FileType; |
| |
| /** |
| * A parser for Windows file names. |
| */ |
| public class WindowsFileNameParser extends LocalFileNameParser |
| { |
| /** |
| * Pops the root prefix off a URI, which has had the scheme removed. |
| */ |
| @Override |
| protected String extractRootPrefix(final String uri, |
| final StringBuilder name) |
| throws FileSystemException |
| { |
| return extractWindowsRootPrefix(uri, name); |
| } |
| |
| @Override |
| protected FileName createFileName(final String scheme, final String rootFile, |
| final String path, final FileType type) |
| { |
| return new WindowsFileName(scheme, rootFile, path, type); |
| } |
| |
| /** |
| * Extracts a Windows root prefix from a name. |
| */ |
| private String extractWindowsRootPrefix(final String uri, |
| final StringBuilder name) |
| throws FileSystemException |
| { |
| // Looking for: |
| // ('/'){0, 3} <letter> ':' '/' |
| // ['/'] '//' <name> '/' <name> ( '/' | <end> ) |
| |
| // Skip over first 4 (unc) leading '/' chars |
| int startPos = 0; |
| final int maxlen = Math.min(4, name.length()); |
| for (; startPos < maxlen && name.charAt(startPos) == '/'; startPos++) |
| { |
| } |
| if (startPos == maxlen && name.length() > (startPos + 1) && name.charAt(startPos + 1) == '/') |
| { |
| // Too many '/' |
| throw new FileSystemException("vfs.provider.local/not-absolute-file-name.error", uri); |
| } |
| name.delete(0, startPos); |
| |
| // Look for drive name |
| final String driveName = extractDrivePrefix(name); |
| if (driveName != null) |
| { |
| return driveName; |
| } |
| |
| // Look for UNC name |
| if (startPos < 2) |
| { |
| throw new FileSystemException("vfs.provider.local/not-absolute-file-name.error", uri); |
| } |
| |
| return "//" + extractUNCPrefix(uri, name); |
| } |
| |
| /** |
| * Extracts a drive prefix from a path. Leading '/' chars have been removed. |
| */ |
| private String extractDrivePrefix(final StringBuilder name) |
| { |
| // Looking for <letter> ':' '/' |
| if (name.length() < 3) |
| { |
| // Too short |
| return null; |
| } |
| final char ch = name.charAt(0); |
| if (ch == '/' || ch == ':') |
| { |
| // Missing drive letter |
| return null; |
| } |
| if (name.charAt(1) != ':') |
| { |
| // Missing ':' |
| return null; |
| } |
| if (name.charAt(2) != '/') |
| { |
| // Missing separator |
| return null; |
| } |
| |
| final String prefix = name.substring(0, 2); |
| name.delete(0, 2); |
| |
| return prefix.intern(); |
| } |
| |
| /** |
| * Extracts a UNC name from a path. Leading '/' chars have been removed. |
| */ |
| private String extractUNCPrefix(final String uri, |
| final StringBuilder name) |
| throws FileSystemException |
| { |
| // Looking for <name> '/' <name> ( '/' | <end> ) |
| |
| // Look for first separator |
| final int maxpos = name.length(); |
| int pos = 0; |
| for (; pos < maxpos && name.charAt(pos) != '/'; pos++) |
| { |
| } |
| pos++; |
| if (pos >= maxpos) |
| { |
| throw new FileSystemException("vfs.provider.local/missing-share-name.error", uri); |
| } |
| |
| // Now have <name> '/' |
| final int startShareName = pos; |
| for (; pos < maxpos && name.charAt(pos) != '/'; pos++) |
| { |
| } |
| if (pos == startShareName) |
| { |
| throw new FileSystemException("vfs.provider.local/missing-share-name.error", uri); |
| } |
| |
| // Now have <name> '/' <name> ( '/' | <end> ) |
| final String prefix = name.substring(0, pos); |
| name.delete(0, pos); |
| return prefix; |
| } |
| } |