ca.ualberta.physics.cssdp.file.remote.protocol.FileConnection.java Source code

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Here is the source code for ca.ualberta.physics.cssdp.file.remote.protocol.FileConnection.java

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/* ============================================================
 * FileConnection.java
 * ============================================================
 * Copyright 2013 University of Alberta
 *
 * 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 ca.ualberta.physics.cssdp.file.remote.protocol;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

import org.joda.time.LocalDateTime;

import ca.ualberta.physics.cssdp.domain.file.Host;
import ca.ualberta.physics.cssdp.domain.file.RemoteFile;

/**
 * A FileConnection does not really involve a socket, but it does act like
 * a SocketConnection: you can use a FileSocketConnection to get a listing of a
 * directory, to copy a file from one place to another, etc, all on some
 * "normal" mounted file system, sans socket.
 */
public class FileConnection extends RemoteConnection {

    public FileConnection(Host host) {
        super(host);
    }

    @Override
    public boolean connect() {
        return true; // file connections are always connected.
    }

    @Override
    public boolean disconnect() {
        return true; // and always disconnected too
    }

    @Override
    public boolean isConnected() {
        return true; // file connections are always connected.
    }

    @Override
    public List<RemoteFile> ls(String path) {

        File dir = new File(path);

        File[] files = dir.listFiles();

        List<RemoteFile> list = new ArrayList<RemoteFile>();
        if (files != null) {
            for (File file : files) {

                long size = file.length();
                LocalDateTime modifiedTstamp = new LocalDateTime(file.lastModified());
                boolean isDir = file.isDirectory();

                RemoteFile remoteFile = new RemoteFile("file://" + file.getAbsolutePath(), size, modifiedTstamp,
                        isDir);
                list.add(remoteFile);

            }
        }

        return list;
    }

    @Override
    public InputStream download(String source) throws IOException {
        if (source.startsWith("file://")) {
            source = source.replaceAll("file://", "");
        }
        return new FileInputStream(new File(source));
    }

}