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/*
 * Copyright 2016 Objectos, Fábrica de Software LTDA.
 *
 * 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 br.com.objectos.schema;

import java.util.Iterator;
import java.util.Map;
import java.util.ServiceLoader;

import br.com.objectos.code.AbstractAnnotationProcessor;
import br.com.objectos.code.ProcessingEnvironmentWrapper;
import br.com.objectos.code.ProcessorListener;
import br.com.objectos.code.tools.ClassPath;
import br.com.objectos.core.lang.Strings;
import br.com.objectos.db.DatabaseService;
import br.com.objectos.db.Dialect;

/**
 * @author [email protected] (Marcio Endo)
 */
abstract class ThisAnnotationProcessor extends AbstractAnnotationProcessor implements ProcessorListener {

  ClassPath classPath;
  DatabaseService database;

  @Override
  public void onInit(ProcessingEnvironmentWrapper processingEnv) {
    Map optionMap = this.processingEnv.getOptions();

    String sourcePath = optionMap.get("sourcePath");
    classPath = ClassPath.builder()
        .sourcePath(sourcePath)
        .addJarOf(getClass())
        .addJarOf(Migration.class)
        .addJarOf(Dialect.class)
        .addPath(Strings.nullToEmpty(sourcePath))
        .build();

    Iterator databaseIterator = ServiceLoader
        .load(DatabaseService.class, getClass().getClassLoader())
        .iterator();
    if (!databaseIterator.hasNext()) {
      throw new IllegalStateException("No DatabaseService found in classpath!");
    }
    database = databaseIterator.next();
  }

}