commons-vfs2/src/main/java/org/apache/commons/vfs2/provider/local/DefaultLocalFileProvider.java

/*
 * 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 java.io.File;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;

import org.apache.commons.lang3.SystemUtils;
import org.apache.commons.vfs2.Capability;
import org.apache.commons.vfs2.FileName;
import org.apache.commons.vfs2.FileObject;
import org.apache.commons.vfs2.FileSystem;
import org.apache.commons.vfs2.FileSystemException;
import org.apache.commons.vfs2.FileSystemOptions;
import org.apache.commons.vfs2.provider.AbstractOriginatingFileProvider;
import org.apache.commons.vfs2.provider.LocalFileProvider;
import org.apache.commons.vfs2.provider.UriParser;

/**
 * A file system provider, which uses direct file access.
 */
public class DefaultLocalFileProvider extends AbstractOriginatingFileProvider implements LocalFileProvider {

    /** The provider's capabilities. */
    public static final Collection<Capability> capabilities = Collections.unmodifiableCollection(
            Arrays.asList(Capability.CREATE, Capability.DELETE, Capability.RENAME, Capability.GET_TYPE,
                    Capability.GET_LAST_MODIFIED, Capability.SET_LAST_MODIFIED_FILE,
                    Capability.SET_LAST_MODIFIED_FOLDER, Capability.LIST_CHILDREN, Capability.READ_CONTENT,
                    Capability.URI, Capability.WRITE_CONTENT, Capability.APPEND_CONTENT, Capability.RANDOM_ACCESS_READ,
                    Capability.RANDOM_ACCESS_SET_LENGTH, Capability.RANDOM_ACCESS_WRITE));

    /**
     * Constructs a new provider.
     */
    public DefaultLocalFileProvider() {
        if (SystemUtils.IS_OS_WINDOWS) {
            setFileNameParser(new WindowsFileNameParser());
        } else {
            setFileNameParser(new GenericFileNameParser());
        }
    }

    /**
     * Determines if a name is an absolute file name.
     *
     * @param name The file name.
     * @return true if the name is absolute, false otherwise.
     */
    @Override
    public boolean isAbsoluteLocalName(final String name) {
        return ((LocalFileNameParser) getFileNameParser()).isAbsoluteName(name);
    }

    /**
     * Finds a local file, from its local name.
     *
     * @param name The name of the file to locate.
     * @return the located FileObject.
     * @throws FileSystemException if an error occurs.
     */
    @Override
    public FileObject findLocalFile(final String name) throws FileSystemException {
        final String scheme = "file:";
        final StringBuilder uri = new StringBuilder(name.length() + scheme.length());
        uri.append(scheme);
        uri.append(name);
        final FileName fileName = parseUri(null, uri.toString());
        return findFile(fileName, null);
    }

    /**
     * Finds a local file.
     *
     * @param file The File to locate.
     * @return the located FileObject.
     * @throws FileSystemException if an error occurs.
     */
    @Override
    public FileObject findLocalFile(final File file) throws FileSystemException {
        return findLocalFile(UriParser.encode(file.getAbsolutePath()));
        // return findLocalFile(file.getAbsolutePath());
    }

    /**
     * Creates the file system.
     */
    @Override
    protected FileSystem doCreateFileSystem(final FileName name, final FileSystemOptions fileSystemOptions)
            throws FileSystemException {
        // Create the file system
        final LocalFileName rootName = (LocalFileName) name;
        return new LocalFileSystem(rootName, rootName.getRootFile(), fileSystemOptions);
    }

    @Override
    public Collection<Capability> getCapabilities() {
        return capabilities;
    }
}