/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you 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 org.apache.myfaces.tobago.apt;
  
  import com.sun.mirror.apt.AnnotationProcessor;
  import com.sun.mirror.apt.AnnotationProcessorEnvironment;
  import com.sun.mirror.apt.AnnotationProcessorFactory;
  import com.sun.mirror.declaration.AnnotationTypeDeclaration;
  
  import java.util.Arrays;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.Set;
  
  public class CheckstyleConfigAnnotationProcessorFactory implements AnnotationProcessorFactory  {
  
    private static final Collection<String> SUPPORTED_ANNOTATIONS
        = Collections.unmodifiableCollection(Arrays.asList(
            "org.apache.myfaces.tobago.apt.annotation.Tag",
            "org.apache.myfaces.tobago.apt.annotation.TagAttribute",
            "org.apache.myfaces.tobago.apt.annotation.Taglib"));
  
    private static final Collection<String> SUPPORTED_OPTIONS = Collections.emptySet();
  
    private CheckstyleConfigAnnotationProcessor annotationProcessor = null;
  
    public Collection<String> supportedAnnotationTypes() {
      return SUPPORTED_ANNOTATIONS;
    }
  
    public Collection<String> supportedOptions() {
      return SUPPORTED_OPTIONS;
    }
  
    public AnnotationProcessor getProcessorFor(Set<AnnotationTypeDeclaration> declarations,
        AnnotationProcessorEnvironment env) {
      if (annotationProcessor == null) {
        annotationProcessor = new CheckstyleConfigAnnotationProcessor(declarations, env);
      }
      return annotationProcessor;
    }
  }