com.facebook.buck.zip.JarEntryContainer.java Source code

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Here is the source code for com.facebook.buck.zip.JarEntryContainer.java

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/*
 * Copyright 2017-present Facebook, Inc.
 *
 * 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.facebook.buck.zip;

import com.google.common.base.Preconditions;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.jar.Manifest;
import java.util.stream.Stream;
import javax.annotation.Nullable;

/**
 * Represents a container for entries to be added to a jar file by @{link JarBuilder}. Examples
 * include a directory tree or another jar file.
 */
public interface JarEntryContainer extends AutoCloseable {
    static JarEntryContainer of(Path source) {
        Preconditions.checkArgument(source.isAbsolute());

        if (Files.isDirectory(source)) {
            return new DirectoryJarEntryContainer(source);
        } else if (Files.isRegularFile(source)) {
            // Assume a zip or jar file.
            return new ZipFileJarEntryContainer(source);
        } else {
            throw new IllegalStateException("Must be a file or directory: " + source);
        }
    }

    @Nullable
    Manifest getManifest() throws IOException;

    Stream<JarEntrySupplier> stream() throws IOException;

    @Override
    void close() throws IOException;
}