org.projectnessie.versioned.transfer.files.ZipArchiveImporter Maven / Gradle / Ivy
/*
* Copyright (C) 2022 Dremio
*
* 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 org.projectnessie.versioned.transfer.files;
import static com.google.common.base.Preconditions.checkState;
import jakarta.annotation.Nonnull;
import java.io.BufferedInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Path;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import org.immutables.value.Value;
/** Nessie importer using data from a ZIP file. */
@Value.Immutable
public abstract class ZipArchiveImporter implements ImportFileSupplier {
public static Builder builder() {
return ImmutableZipArchiveImporter.builder();
}
public interface Builder {
Builder sourceZipFile(Path sourceZipFile);
ZipArchiveImporter build();
}
abstract Path sourceZipFile();
@Value.Lazy
ZipFile zipFile() throws IOException {
return new ZipFile(sourceZipFile().toFile());
}
@Override
@Nonnull
public InputStream newFileInput(@Nonnull String fileName) throws IOException {
@SuppressWarnings("resource")
ZipFile zip = zipFile();
ZipEntry entry = zip.getEntry(fileName);
if (entry == null) {
throw new FileNotFoundException(fileName);
}
checkState(!entry.isDirectory(), "%s is a directory, expect a file", fileName);
return new BufferedInputStream(zip.getInputStream(entry));
}
@Override
public void close() throws IOException {
zipFile().close();
}
}