AjaxMetaModelPlugin.java

/*
 * Copyright 2013 eXo Platform SAS
 *
 * 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 juzu.impl.plugin.ajax;

import juzu.impl.plugin.application.metamodel.ApplicationMetaModel;
import juzu.impl.plugin.application.metamodel.ApplicationMetaModelPlugin;
import juzu.impl.metamodel.AnnotationKey;
import juzu.impl.metamodel.AnnotationState;
import juzu.impl.compiler.ElementHandle;
import juzu.impl.common.JSON;
import juzu.impl.compiler.ProcessingContext;
import juzu.plugin.ajax.Ajax;

import java.util.Collections;
import java.util.HashMap;
import java.util.Set;

/** @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a> */
public class AjaxMetaModelPlugin extends ApplicationMetaModelPlugin {

  /** . */
  private final HashMap<ElementHandle.Package, Boolean> enabledMap = new HashMap<ElementHandle.Package, Boolean>();

  public AjaxMetaModelPlugin() {
    super("ajax");
  }

  @Override
  public Set<Class<? extends java.lang.annotation.Annotation>> init(ProcessingContext env) {
    return Collections.<Class<? extends java.lang.annotation.Annotation>>singleton(Ajax.class);
  }

  @Override
  public void processAnnotationAdded(ApplicationMetaModel metaModel, AnnotationKey key, AnnotationState added) {
    ElementHandle.Package handle = metaModel.getHandle();
    enabledMap.put(handle, true);
  }

  @Override
  public void processAnnotationRemoved(ApplicationMetaModel metaModel, AnnotationKey key, AnnotationState removed) {
    ElementHandle.Package handle = metaModel.getHandle();
    enabledMap.remove(handle);
  }

  @Override
  public void init(ApplicationMetaModel application) {
  }

  @Override
  public void destroy(ApplicationMetaModel application) {
    enabledMap.remove(application.getHandle());
  }

  @Override
  public JSON getDescriptor(ApplicationMetaModel application) {
    ElementHandle.Package handle = application.getHandle();
    Boolean enabled = enabledMap.get(handle);
    return enabled != null && enabled ? new JSON() : null;
  }
}