jack-api/src/com/android/jack/api/example/WithServiceLoader.java

/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * 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.android.jack.api.example;

import com.android.jack.api.ConfigNotSupportedException;
import com.android.jack.api.JackConfig;
import com.android.jack.api.JackProvider;
import com.android.jack.api.v01.Api01CompilationTask;
import com.android.jack.api.v01.Api01Config;
import com.android.jack.api.v01.ChainedException;
import com.android.jack.api.v01.CompilationException;
import com.android.jack.api.v01.ConfigurationException;
import com.android.jack.api.v01.UnrecoverableException;

import java.io.File;
import java.util.Arrays;
import java.util.NoSuchElementException;
import java.util.ServiceLoader;

/**
 * Sample of Jack api usage based on a service provider.
 * This sample requires jack.jar on classpath.
 */
public class WithServiceLoader {
  public static void main(String[] args) throws SecurityException, IllegalArgumentException {
    if (args.length != 3) {
      System.out.println(
          "Usage: <jack-core-library> <source-files-directory> <output-dex-files-directory>");
      return;
    }

    ServiceLoader<JackProvider> serviceLoader = ServiceLoader.load(JackProvider.class);
    JackProvider provider;
    try {
      provider = serviceLoader.iterator().next();
    } catch (NoSuchElementException e) {
      System.out.println("Check that jack.jar is on classpath");
      return;
    }

    System.out.println("Compiler version: " + provider.getCompilerVersion());
    System.out.println("Compiler release name: " + provider.getCompilerReleaseName());
    System.out.println("Compiler release code: " + provider.getCompilerReleaseCode());
    System.out.println("Compiler sub-release kind: " + provider.getCompilerSubReleaseKind());
    System.out.println("Compiler sub-release code: " + provider.getCompilerSubReleaseCode());
    String str;
    str = provider.getCompilerBuildId();
    System.out.println("Compiler build id: " + ((str != null) ? str : "Unknown"));
    str = provider.getCompilerSourceCodeBase();
    System.out.println("Compiler souce code base: " + ((str != null) ? str : "Unknown"));
    System.out.print("Supported configurations: ");

    for (Class<? extends JackConfig> config : provider.getSupportedConfigs()) {
      System.out.print(config.getSimpleName());
      assert provider.isConfigSupported(config);
    }
    System.out.println();

    Api01CompilationTask compilationTask;
    Api01Config config;

    // Get configuration object
    try {
      config = provider.createConfig(Api01Config.class);
    } catch (ConfigNotSupportedException e1) {
      System.err.println("Brest config not supported)");
      return;
    }

    // Configure the compiler
    try {
      config.setClasspath(Arrays.asList(new File(args[0])));
      config.setSourceEntries(Arrays.asList(new File(args[1])));
      config.setOutputDexDir(new File(args[2]));

      // Check and build task
      compilationTask = config.getTask();
    } catch (ConfigurationException exceptions) {
      System.err.println(exceptions.getNextExceptionCount() + " error"
          + (exceptions.getNextExceptionCount() > 1 ? "s" : "") + " during configuration.");
      for (ChainedException exception : exceptions) {
        System.err.println("- " + exception.getMessage());
      }
      return;
    }

    // Run the compilation
    try {
      compilationTask.run();
    } catch (CompilationException exception) {
      // No meaningful message
      System.err.println("User error, see reporter.");
      return;
    } catch (UnrecoverableException exception) {
      System.err.println("Something out of Jack control has happen: " + exception.getMessage());
      return;
    } catch (ConfigurationException exceptions) {
      System.err.println(exceptions.getNextExceptionCount() + " error"
          + (exceptions.getNextExceptionCount() > 1 ? "s" : "") + " during configuration.");
      for (ChainedException exception : exceptions) {
        System.err.println("- " + exception.getMessage());
      }
      return;
    } catch (Throwable e) {
      System.err.println("Internal Compiler Error:");
      e.printStackTrace();
    }
  }
}