Package org.springframework.aop.aspectj.annotation

Source Code of org.springframework.aop.aspectj.annotation.SimpleMetadataAwareAspectInstanceFactory

/*
* Copyright 2002-2009 the original author or authors.
*
* 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 org.springframework.aop.aspectj.annotation;

import org.springframework.aop.aspectj.SimpleAspectInstanceFactory;
import org.springframework.core.Ordered;
import org.springframework.core.annotation.Order;

/**
* Implementation of {@link MetadataAwareAspectInstanceFactory} that
* creates a new instance of the specified aspect class for every
* {@link #getAspectInstance()} call.
*
* @author Juergen Hoeller
* @since 2.0.4
*/
public class SimpleMetadataAwareAspectInstanceFactory extends SimpleAspectInstanceFactory
    implements MetadataAwareAspectInstanceFactory {

  private final AspectMetadata metadata;


  /**
   * Create a new SimpleMetadataAwareAspectInstanceFactory for the given aspect class.
   * @param aspectClass the aspect class
   * @param aspectName the aspect name
   */
  public SimpleMetadataAwareAspectInstanceFactory(Class aspectClass, String aspectName) {
    super(aspectClass);
    this.metadata = new AspectMetadata(aspectClass, aspectName);
  }


  public final AspectMetadata getAspectMetadata() {
    return this.metadata;
  }

  /**
   * Determine a fallback order for the case that the aspect instance
   * does not express an instance-specific order through implementing
   * the {@link org.springframework.core.Ordered} interface.
   * <p>The default implementation simply returns <code>Ordered.LOWEST_PRECEDENCE</code>.
   * @param aspectClass the aspect class
   */
  @Override
  protected int getOrderForAspectClass(Class<?> aspectClass) {
    Order order = aspectClass.getAnnotation(Order.class);
    if (order != null) {
      return order.value();
    }
    return Ordered.LOWEST_PRECEDENCE;
  }

}
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