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// Copyright 2017 The Bazel Authors. All rights reserved.
//
// 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.google.devtools.build.android.desugar.io;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOError;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.function.Consumer;
import java.util.stream.Stream;
import java.util.zip.ZipEntry;
/** Input provider is a directory. */
class DirectoryInputFileProvider implements InputFileProvider {
private final Path root;
public DirectoryInputFileProvider(Path root) {
this.root = root;
}
@Override
public String toString() {
return root.getFileName().toString();
}
@Override
public InputStream getInputStream(String filename) throws IOException {
return new FileInputStream(root.resolve(filename).toFile());
}
@Override
public ZipEntry getZipEntry(String filename) {
ZipEntry destEntry = new ZipEntry(filename);
destEntry.setTime(0L); // Use stable timestamp Jan 1 1980
return destEntry;
}
@Override
public void close() throws IOException {
// Nothing to close
}
@Override
public Iterator<String> iterator() {
final List<String> entries = new ArrayList<>();
try (Stream<Path> paths = Files.walk(root)) {
paths.forEach(
new Consumer<Path>() {
@Override
public void accept(Path t) {
if (Files.isRegularFile(t)) {
// Internally, we use '/' as a common package separator in filename to abstract
// that filename can comes from a zip or a directory.
entries.add(root.relativize(t).toString().replace(File.separatorChar, '/'));
}
}
});
} catch (IOException e) {
throw new IOError(e);
}
return entries.iterator();
}
}
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