com.cloudera.cdk.morphline.hadoop.rcfile.SingleStreamFileSystem.java Source code

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Here is the source code for com.cloudera.cdk.morphline.hadoop.rcfile.SingleStreamFileSystem.java

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/*
 * Copyright 2013 Cloudera Inc.
 *
 * 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 com.cloudera.cdk.morphline.hadoop.rcfile;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;

import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.util.Progressable;

/**
 * Very simple Filesystem Implementation which serves an InputStream for a given
 * path. This is used to serve the underlying input stream from a FileSystem
 * Interface. Only open() and getFileStatus() is implemented.
 */
public final class SingleStreamFileSystem extends FileSystem {
    private final FSDataInputStream inputStream;
    private final Path path;
    private final FileStatus fileStatus;

    public SingleStreamFileSystem(InputStream inputStream, Path path) throws IOException {
        this.inputStream = new FSDataInputStream(inputStream);
        this.path = path;
        // Since this is a stream, we dont know the length of the stream. Setting it
        // to the maximum size
        this.fileStatus = new FileStatus(Long.MAX_VALUE, false, 0, 0, 0, path);
    }

    @Override
    public URI getUri() {
        throw new UnsupportedOperationException("not implemented!");
    }

    @Override
    public FSDataInputStream open(final Path f, final int bufferSize) throws IOException {
        if (f.equals(path)) {
            return inputStream;
        }
        throw new UnsupportedOperationException("Path " + f.getName() + " is not found");
    }

    @Override
    public FSDataOutputStream create(final Path f, final FsPermission permission, final boolean overwrite,
            final int bufferSize, final short replication, final long blockSize, final Progressable progress)
            throws IOException {
        throw new UnsupportedOperationException("not implemented!");
    }

    @Override
    public FSDataOutputStream append(final Path f, final int bufferSize, final Progressable progress)
            throws IOException {
        throw new UnsupportedOperationException("not implemented!");
    }

    @Override
    public boolean rename(final Path src, final Path dst) throws IOException {
        throw new UnsupportedOperationException("not implemented!");
    }

    @Override
    public boolean delete(final Path f, final boolean recursive) throws IOException {
        throw new UnsupportedOperationException("not implemented!");
    }

    @Override
    public FileStatus[] listStatus(final Path f) throws FileNotFoundException, IOException {
        throw new UnsupportedOperationException("not implemented!");
    }

    @Override
    public void setWorkingDirectory(final Path new_dir) {
        throw new UnsupportedOperationException("not implemented!");
    }

    @Override
    public Path getWorkingDirectory() {
        throw new UnsupportedOperationException("not implemented!");
    }

    @Override
    public boolean mkdirs(final Path f, final FsPermission permission) throws IOException {
        throw new UnsupportedOperationException("not implemented!");
    }

    @Override
    public FileStatus getFileStatus(final Path f) throws IOException {
        if (path.equals(f)) {
            return fileStatus;
        }
        throw new UnsupportedOperationException("Path " + f.getName() + " is not found");
    }
}