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/*
 * 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.url;

import org.apache.commons.vfs2.FileName;
import org.apache.commons.vfs2.FileSystemException;
import org.apache.commons.vfs2.provider.AbstractFileNameParser;
import org.apache.commons.vfs2.provider.URLFileName;
import org.apache.commons.vfs2.provider.URLFileNameParser;
import org.apache.commons.vfs2.provider.VfsComponentContext;
import org.apache.commons.vfs2.provider.local.GenericFileNameParser;

/**
 * Implementation for any java.net.url based filesystem.
 * 

* Composite of URLFilenameParser and GenericFilenameParser */ public class UrlFileNameParser extends AbstractFileNameParser { private final URLFileNameParser url = new URLFileNameParser(80); private final GenericFileNameParser generic = new GenericFileNameParser(); public UrlFileNameParser() { super(); } @Override public boolean encodeCharacter(final char ch) { return super.encodeCharacter(ch) || ch == '?'; } /** * Parse a URI. * * @param context The component context. * @param base The base FileName. * @param uri The target file name. * @return The FileName. * @throws FileSystemException if an error occurs */ @Override public FileName parseUri(final VfsComponentContext context, final FileName base, final String uri) throws FileSystemException { if (isUrlBased(base, uri)) { return url.parseUri(context, base, uri); } return generic.parseUri(context, base, uri); } /** * Guess if the given file name is an URL with host or not. *

* VFS treats such URLs differently. *

* A file name is URL-based if the base is a {@code URLFileName} or there are only 2 slashes after the scheme. e.g: * {@code http://host/path}, {@code file:/path/to/file}, {@code file:///path/to/file}. * * @param base The filename is relative to this base. * @param filename The filename. * @return true if filename contains two slashes or base was URLFileName. */ protected boolean isUrlBased(final FileName base, final String filename) { if (base instanceof URLFileName) { return true; } return countSlashes(filename) == 2; } /** * This method counts the slashes after the scheme. * * @param filename The file name. * @return number of slashes */ protected int countSlashes(final String filename) { int state = 0; int nuofSlash = 0; for (int pos = 0; pos < filename.length(); pos++) { final char c = filename.charAt(pos); if (state == 0) { if (c >= 'a' && c <= 'z') { continue; } if (c == ':') { state++; continue; } } else if (state == 1) { if (c == '/') { nuofSlash++; } else { return nuofSlash; } } } return nuofSlash; } }





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