| /******************************************************************************* |
| * Copyright (c) 2015 Ericsson |
| * |
| * All rights reserved. This program and the accompanying materials are |
| * made available under the terms of the Eclipse Public License v1.0 which |
| * accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Marc-Andre Laperle - Initial API and implementation. |
| *******************************************************************************/ |
| |
| package org.eclipse.tracecompass.internal.tmf.ui.project.wizards.importtrace; |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.Enumeration; |
| import java.util.zip.GZIPInputStream; |
| |
| /** |
| * Wrapper for a Gzipped file |
| */ |
| public class GzipFile implements AutoCloseable { |
| |
| private static final String GZIP_EXTENSION = ".gz"; //$NON-NLS-1$ |
| |
| private final File fFile; |
| private final GzipEntry fEntry; |
| private GzipEntry fCurEntry; |
| private boolean fIsClosed = false; |
| |
| private final InputStream fInternalEntryStream; |
| |
| /** |
| * Create a new GzipFile for the given file. |
| * |
| * @param source the source file |
| * @throws IOException |
| * File not found and such |
| */ |
| public GzipFile(File source) throws IOException { |
| fFile = source; |
| |
| InputStream in = new FileInputStream(source); |
| try { |
| // Check if it's a GZIPInputStream. |
| fInternalEntryStream = new GZIPInputStream(in); |
| } catch (IOException e) { |
| in.close(); |
| throw e; |
| } |
| String name = source.getName(); |
| fEntry = new GzipEntry(name.substring(0, name.lastIndexOf(GZIP_EXTENSION))); |
| fCurEntry = fEntry; |
| } |
| |
| /** |
| * Close the tar file input stream. |
| * |
| * @throws IOException if the file cannot be successfully closed |
| */ |
| @Override |
| public void close() throws IOException { |
| if (fInternalEntryStream != null && !fIsClosed) { |
| fInternalEntryStream.close(); |
| fIsClosed = true; |
| |
| } |
| } |
| |
| /** |
| * Create a new GzipFile for the given path name. |
| * |
| * @param filename |
| * the filename of the gzip file |
| * @throws IOException |
| * if the file cannot be opened |
| */ |
| public GzipFile(String filename) throws IOException { |
| this(new File(filename)); |
| } |
| |
| /** |
| * Returns an enumeration cataloguing the tar archive. |
| * |
| * @return enumeration of all files in the archive |
| */ |
| public Enumeration<GzipEntry> entries() { |
| return new Enumeration<GzipEntry>() { |
| @Override |
| public boolean hasMoreElements() { |
| return (fCurEntry != null); |
| } |
| |
| @Override |
| public GzipEntry nextElement() { |
| GzipEntry oldEntry = fCurEntry; |
| fCurEntry = null; |
| return oldEntry; |
| } |
| }; |
| } |
| |
| /** |
| * Returns a new InputStream for the given file in the tar archive. |
| * |
| * @param entry |
| * the GzipEntry |
| * @return an input stream for the given file |
| */ |
| public InputStream getInputStream(GzipEntry entry) { |
| if (entry != fEntry) { |
| throw new IllegalArgumentException(); |
| } |
| return fInternalEntryStream; |
| } |
| |
| /** |
| * Returns the path name of the file this archive represents. |
| * |
| * @return path |
| */ |
| public String getName() { |
| return fFile.getPath(); |
| } |
| |
| @Override |
| protected void finalize() throws Throwable { |
| close(); |
| super.finalize(); |
| } |
| |
| } |