Parameter.java

/*
 * Copyright 2014 mango.jfaster.org
 *
 * The Mango Project 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.jfaster.mango.interceptor;

import org.jfaster.mango.descriptor.ParameterDescriptor;

import javax.annotation.Nullable;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.List;

/**
 * @author ash
 */
public class Parameter {

  private final ParameterDescriptor descriptor;
  private final Object value;

  public Parameter(ParameterDescriptor descriptor, Object value) {
    this.descriptor = descriptor;
    this.value = value;
  }

  public boolean isAnnotationPresent(Class<? extends Annotation> annotationType) {
    return getAnnotation(annotationType) != null;
  }

  @Nullable
  public <A extends Annotation> A getAnnotation(Class<A> annotationType) {
    for (Annotation annotation : getAnnotations()) {
      if (annotationType.isInstance(annotation)) {
        return annotationType.cast(annotation);
      }
    }
    return null;
  }

  public Object getValue() {
    return value;
  }

  public Type getType() {
    return descriptor.getType();
  }

  public Class<?> getRawType() {
    return descriptor.getRawType();
  }

  public List<Annotation> getAnnotations() {
    return descriptor.getAnnotations();
  }

}