// Copyright 2015 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.buildjar.genclass;

import static com.google.common.base.Preconditions.checkNotNull;

import com.google.common.collect.ImmutableList;
import java.nio.file.Path;

/** The options for a {@GenClass} action. */
public final class GenClassOptions {

  /** A builder for {@link GenClassOptions}. */
  public static final class Builder {
    private Path manifest;
    private final ImmutableList.Builder<Path> generatedSourceJars = ImmutableList.builder();
    private Path classJar;
    private Path outputJar;
    private Path tempDir;

    public Builder() {}

    public void setManifest(Path manifest) {
      this.manifest = manifest;
    }

    public void addGeneratedSourceJar(Path generatedSourceJar) {
      this.generatedSourceJars.add(generatedSourceJar);
    }

    public void setClassJar(Path classJar) {
      this.classJar = classJar;
    }

    public void setOutputJar(Path outputJar) {
      this.outputJar = outputJar;
    }

    public void setTempDir(Path tempDir) {
      this.tempDir = tempDir;
    }

    GenClassOptions build() {
      return new GenClassOptions(
          manifest, generatedSourceJars.build(), classJar, outputJar, tempDir);
    }
  }

  private final Path manifest;
  private final ImmutableList<Path> generatedSourceJars;
  private final Path classJar;
  private final Path outputJar;
  private final Path tempDir;

  private GenClassOptions(
      Path manifest,
      ImmutableList<Path> generatedSourceJars,
      Path classJar,
      Path outputJar,
      Path tempDir) {
    this.manifest = checkNotNull(manifest);
    this.generatedSourceJars = checkNotNull(generatedSourceJars);
    this.classJar = checkNotNull(classJar);
    this.outputJar = checkNotNull(outputJar);
    this.tempDir = checkNotNull(tempDir);
  }

  /** The path to the compilation manifest proto. */
  public Path manifest() {
    return manifest;
  }

  /**
   * The list of paths to jars containing generated Java source files corresponding to classes in
   * the input class jar which should be included in the gen jar. The packages of the Java source
   * files must match their path in the jar, and there can be only 1 top-level compilation unit,
   * because the list of compilation units in the Java file will be based on the file's name.
   */
  public ImmutableList<Path> getGeneratedSourceJars() {
    return generatedSourceJars;
  }

  /** The path to the compilation's class jar. */
  public Path classJar() {
    return classJar;
  }

  /** The path to write the output to. */
  public Path outputJar() {
    return outputJar;
  }

  /** The path to the temp directory. */
  public Path tempDir() {
    return tempDir;
  }

  /** Returns a builder for {@link GenClassOptions}. */
  public static Builder builder() {
    return new Builder();
  }
}