/*
* Copyright 2012 the original author or authors.
*
* 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.gradle.api.plugins.buildcomparison.outcome.internal.archive.entry;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import org.apache.commons.io.IOUtils;
import org.gradle.api.Transformer;
import org.gradle.api.UncheckedIOException;
import java.io.*;
import java.util.Set;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
public class FileToArchiveEntrySetTransformer implements Transformer<Set<ArchiveEntry>, File> {
public Set<ArchiveEntry> transform(File archiveFile) {
FileInputStream fileInputStream;
try {
fileInputStream = new FileInputStream(archiveFile);
} catch (FileNotFoundException e) {
throw new UncheckedIOException(e);
}
ImmutableSet.Builder<ArchiveEntry> allEntries = ImmutableSet.builder();
walk(fileInputStream, allEntries, ImmutableList.<String>of());
return allEntries.build();
}
private ImmutableSet<ArchiveEntry> walk(InputStream archiveInputStream, ImmutableSet.Builder<ArchiveEntry> allEntries, ImmutableList<String> parentPaths) {
ImmutableSet.Builder<ArchiveEntry> entries = ImmutableSet.builder();
ZipInputStream zipStream = new ZipInputStream(archiveInputStream);
try {
ZipEntry entry = zipStream.getNextEntry();
while (entry != null) {
ArchiveEntry.Builder builder = new ArchiveEntry.Builder();
builder.setParentPaths(parentPaths);
builder.setPath(entry.getName());
builder.setCrc(entry.getCrc());
builder.setDirectory(entry.isDirectory());
builder.setSize(entry.getSize());
if (!builder.isDirectory() && (zipStream.available() == 1)) {
boolean zipEntry;
final BufferedInputStream bis = new BufferedInputStream(zipStream) {
@Override
public void close() throws IOException {
}
};
bis.mark(Integer.MAX_VALUE);
zipEntry = new ZipInputStream(bis).getNextEntry() != null;
bis.reset();
if (zipEntry) {
ImmutableList<String> nextParentPaths = ImmutableList.<String>builder().addAll(parentPaths).add(entry.getName()).build();
ImmutableSet<ArchiveEntry> subEntries = walk(bis, allEntries, nextParentPaths);
builder.setSubEntries(subEntries);
}
}
ArchiveEntry archiveEntry = builder.build();
entries.add(archiveEntry);
allEntries.add(archiveEntry);
zipStream.closeEntry();
entry = zipStream.getNextEntry();
}
} catch (IOException e) {
throw new UncheckedIOException(e);
} finally {
IOUtils.closeQuietly(zipStream);
}
return entries.build();
}
}