/*
 * 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.jvm.java.abi;

import com.facebook.buck.event.BuckEventBus;
import com.facebook.buck.event.SimplePerfEvent;
import com.facebook.buck.util.HumanReadableException;
import java.io.IOException;
import java.util.Set;
import javax.lang.model.SourceVersion;
import javax.lang.model.element.TypeElement;
import javax.lang.model.util.Elements;
import javax.tools.JavaFileManager;

public class StubGenerator {
  private final SourceVersion version;
  private final Elements elements;
  private final JavaFileManager fileManager;
  private final BuckEventBus eventBus;

  public StubGenerator(
      SourceVersion version,
      Elements elements,
      JavaFileManager fileManager,
      BuckEventBus eventBus) {
    this.version = version;
    this.elements = elements;
    this.fileManager = fileManager;
    this.eventBus = eventBus;
  }

  public void generate(Set<TypeElement> topLevelTypes) {
    try (SimplePerfEvent.Scope ignored = SimplePerfEvent.scope(eventBus, "generate_stubs")) {
      new StubJar(version, elements, topLevelTypes).writeTo(fileManager);
    } catch (IOException e) {
      throw new HumanReadableException("Failed to generate abi: %s", e.getMessage());
    }
  }
}