/*
 * Copyright 2016-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.example;

import javax.annotation.processing.AbstractProcessor;
import javax.annotation.processing.Filer;
import javax.annotation.processing.RoundEnvironment;
import javax.annotation.processing.SupportedAnnotationTypes;
import javax.annotation.processing.SupportedSourceVersion;
import javax.lang.model.element.TypeElement;
import javax.lang.model.SourceVersion;
import javax.tools.Diagnostic;
import javax.tools.FileObject;
import javax.tools.StandardLocation;

import java.io.IOException;
import java.io.InputStream;
import java.util.Set;

@SupportedAnnotationTypes({
    "com.annotations.AP",
})
@SupportedSourceVersion(SourceVersion.RELEASE_7)
public class AnnotationProcessor extends AbstractProcessor {
  @Override
  public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
    try {
      FileObject resource = processingEnv.getFiler().getResource(
          StandardLocation.CLASS_PATH,
          "",
          "read_file.txt"
      );

      InputStream stream = resource.openInputStream();
      stream.read();
    } catch (IOException e) {
      processingEnv.getMessager().printMessage(
          Diagnostic.Kind.ERROR,
          "Could not open read_file.txt");
    }
    return false;
  }
}