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This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

There is a newer version: 35.0.0.Beta1

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/*
 * Copyright (C) 2012 The Guava 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 com.google.common.reflect;

import static com.google.common.base.Preconditions.checkNotNull;

import com.google.common.annotations.Beta;
import com.google.common.collect.FluentIterable;
import com.google.common.collect.ImmutableList;
import java.lang.annotation.Annotation;
import java.lang.reflect.AnnotatedElement;
import org.checkerframework.checker.nullness.compatqual.NullableDecl;

/**
 * Represents a method or constructor parameter.
 *
 * @author Ben Yu
 * @since 14.0
 */
@Beta
public final class Parameter implements AnnotatedElement {

  private final Invokable declaration;
  private final int position;
  private final TypeToken type;
  private final ImmutableList annotations;

  Parameter(
      Invokable declaration, int position, TypeToken type, Annotation[] annotations) {
    this.declaration = declaration;
    this.position = position;
    this.type = type;
    this.annotations = ImmutableList.copyOf(annotations);
  }

  /** Returns the type of the parameter. */
  public TypeToken getType() {
    return type;
  }

  /** Returns the {@link Invokable} that declares this parameter. */
  public Invokable getDeclaringInvokable() {
    return declaration;
  }

  @Override
  public boolean isAnnotationPresent(Class annotationType) {
    return getAnnotation(annotationType) != null;
  }

  @Override
  @NullableDecl
  public  A getAnnotation(Class annotationType) {
    checkNotNull(annotationType);
    for (Annotation annotation : annotations) {
      if (annotationType.isInstance(annotation)) {
        return annotationType.cast(annotation);
      }
    }
    return null;
  }

  @Override
  public Annotation[] getAnnotations() {
    return getDeclaredAnnotations();
  }

  /** @since 18.0 */
  // @Override on JDK8
  public  A[] getAnnotationsByType(Class annotationType) {
    return getDeclaredAnnotationsByType(annotationType);
  }

  /** @since 18.0 */
  // @Override on JDK8
  @Override
  public Annotation[] getDeclaredAnnotations() {
    return annotations.toArray(new Annotation[annotations.size()]);
  }

  /** @since 18.0 */
  // @Override on JDK8
  @NullableDecl
  public  A getDeclaredAnnotation(Class annotationType) {
    checkNotNull(annotationType);
    return FluentIterable.from(annotations).filter(annotationType).first().orNull();
  }

  /** @since 18.0 */
  // @Override on JDK8
  public  A[] getDeclaredAnnotationsByType(Class annotationType) {
    return FluentIterable.from(annotations).filter(annotationType).toArray(annotationType);
  }

  @Override
  public boolean equals(@NullableDecl Object obj) {
    if (obj instanceof Parameter) {
      Parameter that = (Parameter) obj;
      return position == that.position && declaration.equals(that.declaration);
    }
    return false;
  }

  @Override
  public int hashCode() {
    return position;
  }

  @Override
  public String toString() {
    return type + " arg" + position;
  }
}