| package org.apache.commons.digester3.annotations.reflect; |
| |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF 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. |
| */ |
| |
| import java.lang.annotation.Annotation; |
| import java.lang.reflect.AnnotatedElement; |
| |
| /** |
| * Class to supply the missing Java {@code AnnotatedElement} for method arguments. |
| * |
| * @since 2.1 |
| */ |
| public final class MethodArgument |
| implements AnnotatedElement |
| { |
| |
| /** |
| * The method argument index. |
| */ |
| private final int index; |
| |
| /** |
| * The method argument type. |
| */ |
| private final Class<?> parameterType; |
| |
| /** |
| * The method argument annotations. |
| */ |
| private final Annotation[] annotations; |
| |
| /** |
| * Creates a new method argument as {@code AnnotatedElement}. |
| * |
| * @param index the method argument index. |
| * @param parameterType the method argument type. |
| * @param annotations the method argument annotations. |
| */ |
| public MethodArgument( final int index, final Class<?> parameterType, final Annotation[] annotations ) |
| { |
| if ( parameterType == null ) |
| { |
| throw new IllegalArgumentException( "Argument 'parameterType' must be not null" ); |
| } |
| if ( annotations == null ) |
| { |
| throw new IllegalArgumentException( "Argument 'annotations' must be not null" ); |
| } |
| |
| this.index = index; |
| this.parameterType = parameterType; |
| this.annotations = annotations.clone(); |
| } |
| |
| /** |
| * Returns the method argument index. |
| * |
| * @return the method argument index. |
| */ |
| public int getIndex() |
| { |
| return this.index; |
| } |
| |
| /** |
| * Returns the method argument type. |
| * |
| * @return the method argument type. |
| */ |
| public Class<?> getParameterType() |
| { |
| return this.parameterType; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public <T extends Annotation> T getAnnotation( final Class<T> annotationType ) |
| { |
| for ( final Annotation annotation : this.annotations ) |
| { |
| if ( annotationType == annotation.annotationType() ) |
| { |
| return annotationType.cast( annotation ); |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public Annotation[] getAnnotations() |
| { |
| return this.getAnnotationsArrayCopy(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public Annotation[] getDeclaredAnnotations() |
| { |
| return this.getAnnotationsArrayCopy(); |
| } |
| |
| /** |
| * Returns an annotations array, copy of the declared annotations in this method argument. |
| * |
| * @return an annotations array, copy of the declared annotations in this method argument. |
| */ |
| private Annotation[] getAnnotationsArrayCopy() |
| { |
| return this.annotations.clone(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public boolean isAnnotationPresent( final Class<? extends Annotation> annotationType ) |
| { |
| for ( final Annotation annotation : this.annotations ) |
| { |
| if ( annotationType == annotation.annotationType() ) |
| { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| } |