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Java example source code file (DynamicFinder.java)

This example Java source code file (DynamicFinder.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

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Java - Java tags/keywords

dynamicfinder, finder, method, reflection

The DynamicFinder.java Java example source code

 * Copyright (C) 2010 Google, Inc.
 * 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,
 * See the License for the specific language governing permissions and
 * limitations under the License.

package com.google.inject.persist.finder;

import java.lang.reflect.Method;

 * Utility that helps you introspect dynamic finder methods.
 * @author dhanji@gmail.com (Dhanji R. Prasanna)
public final class DynamicFinder {
  private final Method method;
  private final Finder finder;

  public DynamicFinder(Method method) {
    this.method = method;
    this.finder = method.getAnnotation(Finder.class);

   * Returns some metadata if the method is annotated {@code @Finder} or null.
   * @param method a method you want to test as a dynamic finder
  public static DynamicFinder from(Method method) {
    return method.isAnnotationPresent(Finder.class) ? new DynamicFinder(method) : null;

  public Finder metadata() {
    return finder;

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