/*
* Copyright 2002-2005 The Apache Software Foundation.
*
* Licensed 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.vfs.provider.local;
import org.apache.commons.vfs.FileName;
import org.apache.commons.vfs.FileSystemException;
import org.apache.commons.vfs.FileType;
import org.apache.commons.vfs.provider.AbstractFileNameParser;
import org.apache.commons.vfs.provider.UriParser;
import org.apache.commons.vfs.provider.VfsComponentContext;
/**
* A name parser.
*
* @author <a href="mailto:adammurdoch@apache.org">Adam Murdoch</a>
*/
public abstract class LocalFileNameParser extends AbstractFileNameParser
{
/**
* Determines if a name is an absolute file name.
*/
public boolean isAbsoluteName(final String name)
{
// TODO - this is yucky
StringBuffer b = new StringBuffer(name);
try
{
UriParser.fixSeparators(b);
extractRootPrefix(name, b);
return true;
}
catch (FileSystemException e)
{
return false;
}
}
/**
* Pops the root prefix off a URI, which has had the scheme removed.
*/
protected abstract String extractRootPrefix(final String uri,
final StringBuffer name)
throws FileSystemException;
public FileName parseUri(final VfsComponentContext context, FileName base, final String filename) throws FileSystemException
{
final StringBuffer name = new StringBuffer();
// Extract the scheme
String scheme = UriParser.extractScheme(filename, name);
if (scheme == null)
{
scheme = "file";
}
// Remove encoding, and adjust the separators
UriParser.canonicalizePath(name, 0, name.length(), this);
UriParser.fixSeparators(name);
// Extract the root prefix
final String rootFile = extractRootPrefix(filename, name);
// Normalise the path
FileType fileType = UriParser.normalisePath(name);
final String path = name.toString();
return createFileName(
scheme,
rootFile,
path,
fileType);
}
protected abstract FileName createFileName(String scheme, final String rootFile, final String path, final FileType type);
}