/*
    * #%L
    * wcm.io
    * %%
    * Copyright (C) 2015 wcm.io
    * %%
    * 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.
   * #L%
   */
  package io.wcm.caravan.hal.docs.impl.augmenter;
  
  import io.wcm.caravan.hal.docs.HalDocsAugmenter;
  import io.wcm.caravan.hal.docs.HalDocsAugmenterFactory;
  import io.wcm.caravan.hal.docs.impl.DocsPath;
  import io.wcm.caravan.hal.docs.impl.reader.ServiceModelReader;
  import io.wcm.caravan.hal.resource.HalResource;
  
  import org.apache.felix.scr.annotations.Component;
  import org.apache.felix.scr.annotations.Service;
  import org.osgi.framework.Bundle;
  
  /**
   * Reads service information from model metadata stored in bundle with hal-docs-maven-plugin.
   */
  @Component
  @Service(value = HalDocsAugmenterFactory.class, serviceFactory = true)
  public class HalDocsAugmenterFactoryImpl implements HalDocsAugmenterFactory {
  
    private static final HalDocsAugmenter NOOP_AUGMENTER = new HalDocsAugmenter() {
      @Override
      public void augment(HalResource resource) {
        // do nothing
      }
    };
  
    @Override
    public HalDocsAugmenter create(Bundle bundle) {
      if (bundle != null) {
        String docsPath = DocsPath.get(bundle);
        if (docsPath != null) {
          io.wcm.caravan.hal.docs.impl.model.Service serviceModel = ServiceModelReader.read(bundle);
          if (serviceModel != null) {
            return new HalDocsAugmenterImpl(serviceModel, docsPath);
          }
        }
      }
      return NOOP_AUGMENTER;
    }
  
  }