com.meltmedia.cadmium.servlets.guice.GuiceProviderFactory Maven / Gradle / Ivy

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/**
 *    Copyright 2012 meltmedia
 *
 *    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.meltmedia.cadmium.servlets.guice;

import java.lang.annotation.Annotation;
import java.util.Iterator;
import java.util.Map;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.inject.Injector;
import com.google.inject.Scope;
import com.google.inject.servlet.ServletScopes;
import com.sun.jersey.api.core.ResourceConfig;
import com.sun.jersey.core.spi.component.ComponentScope;
import com.sun.jersey.guice.spi.container.GuiceComponentProviderFactory;

public class GuiceProviderFactory extends GuiceComponentProviderFactory {
  private final Logger logger = LoggerFactory.getLogger(getClass());
  
  private Class annotation;

  public GuiceProviderFactory(ResourceConfig config, Injector injector, Class annotation) {
    super(config, injector);
    this.annotation = annotation;
    logger.debug("Filtering out endpoints not annotated with {}", annotation);
    filterClasses(config);
  }

  @Override
  public Map createScopeMap() {
    Map m = super.createScopeMap();

    m.put(ServletScopes.REQUEST, ComponentScope.PerRequest);
    return m;
  }
  
  private void filterClasses(ResourceConfig config) {
    Iterator> clItr = config.getClasses().iterator();
    while(clItr.hasNext()) {
      Class clazz = clItr.next();
      if(ResourceConfig.isRootResourceClass(clazz) && !clazz.isAnnotationPresent(annotation)) {
        logger.debug("Removing endpoint {}", clazz);
        clItr.remove();
      }
    }
  }
}