com.google.devtools.build.android.desugar.io.DirectoryOutputFileProvider.java Source code

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Here is the source code for com.google.devtools.build.android.desugar.io.DirectoryOutputFileProvider.java

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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 com.google.common.io.ByteStreams;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.file.Files;
import java.nio.file.Path;

/** Output provider is a directory. */
class DirectoryOutputFileProvider implements OutputFileProvider {

    private final Path root;

    public DirectoryOutputFileProvider(Path root) {
        this.root = root;
    }

    @Override
    public void copyFrom(String filename, InputFileProvider inputFileProvider) throws IOException {
        Path path = root.resolve(filename);
        createParentFolder(path);
        try (InputStream is = inputFileProvider.getInputStream(filename);
                OutputStream os = Files.newOutputStream(path)) {
            ByteStreams.copy(is, os);
        }
    }

    @Override
    public void write(String filename, byte[] content) throws IOException {
        Path path = root.resolve(filename);
        createParentFolder(path);
        Files.write(path, content);
    }

    @Override
    public void close() {
        // Nothing to close
    }

    private void createParentFolder(Path path) throws IOException {
        if (!Files.exists(path.getParent())) {
            Files.createDirectories(path.getParent());
        }
    }
}