/**
* Copyright (C) 2001-2017 by RapidMiner and the contributors
*
* Complete list of developers available at our web site:
*
* http://rapidminer.com
*
* This program is free software: you can redistribute it and/or modify it under the terms of the
* GNU Affero General Public License as published by the Free Software Foundation, either version 3
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License along with this program.
* If not, see http://www.gnu.org/licenses/.
*/
package com.rapidminer.operator.nio.file;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import com.rapidminer.operator.OperatorException;
import com.rapidminer.tools.Tools;
/**
*
* @author Nils Woehler
*
*/
public class ZipEntryObject extends FileObject {
private static final long serialVersionUID = 1L;
private static final String TEMP_FILE_PREFIX = "rm_file_";
private static final String TEMP_FILE_SUFFIX = ".dump";
private File file = null;
private ZipEntry entry;
private ZipFile zipFile;
public ZipEntryObject(ZipEntry entry, ZipFile zipFile) {
super();
this.entry = entry;
this.zipFile = zipFile;
}
@Override
public InputStream openStream() throws OperatorException {
try {
return zipFile.getInputStream(entry);
} catch (IOException e) {
throw new OperatorException("302", e, entry.getName(), e.getMessage());
}
}
@Override
public File getFile() throws OperatorException {
if (file == null) {
try {
file = File.createTempFile(TEMP_FILE_PREFIX, TEMP_FILE_SUFFIX);
file.deleteOnExit();
} catch (IOException e) {
throw new OperatorException("303", e, "File in " + System.getProperty("java.io.tmpdir"), e.getMessage());
}
try (FileOutputStream fos = new FileOutputStream(file); InputStream in = zipFile.getInputStream(entry);) {
Tools.copyStreamSynchronously(in, fos, true);
} catch (IOException e) {
throw new OperatorException("303", e, file, e.getMessage());
}
return file;
} else {
return file;
}
}
/**
* Returns the uncompressed size of the entry data in number of bytes, or -1 if not known.
*/
@Override
public long getLength() throws OperatorException {
return entry.getSize();
}
@Override
public String toString() {
return file != null ? "ZipEntry " + entry.getName() + " stored in temporary file: " + file.getAbsolutePath()
: "ZipEntry " + entry.getName() + " from ZipFile " + zipFile.getName();
}
@Override
protected void finalize() throws Throwable {
if (file != null) {
file.delete();
}
super.finalize();
}
}