ClassIntrospector.java

/*
 * Portions of this software was developed by employees of the National Institute
 * of Standards and Technology (NIST), an agency of the Federal Government and is
 * being made available as a public service. Pursuant to title 17 United States
 * Code Section 105, works of NIST employees are not subject to copyright
 * protection in the United States. This software may be subject to foreign
 * copyright. Permission in the United States and in foreign countries, to the
 * extent that NIST may hold copyright, to use, copy, modify, create derivative
 * works, and distribute this software and its documentation without fee is hereby
 * granted on a non-exclusive basis, provided that this notice and disclaimer
 * of warranty appears in all copies.
 *
 * THE SOFTWARE IS PROVIDED 'AS IS' WITHOUT ANY WARRANTY OF ANY KIND, EITHER
 * EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY
 * THAT THE SOFTWARE WILL CONFORM TO SPECIFICATIONS, ANY IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND FREEDOM FROM
 * INFRINGEMENT, AND ANY WARRANTY THAT THE DOCUMENTATION WILL CONFORM TO THE
 * SOFTWARE, OR ANY WARRANTY THAT THE SOFTWARE WILL BE ERROR FREE.  IN NO EVENT
 * SHALL NIST BE LIABLE FOR ANY DAMAGES, INCLUDING, BUT NOT LIMITED TO, DIRECT,
 * INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES, ARISING OUT OF, RESULTING FROM,
 * OR IN ANY WAY CONNECTED WITH THIS SOFTWARE, WHETHER OR NOT BASED UPON WARRANTY,
 * CONTRACT, TORT, OR OTHERWISE, WHETHER OR NOT INJURY WAS SUSTAINED BY PERSONS OR
 * PROPERTY OR OTHERWISE, AND WHETHER OR NOT LOSS WAS SUSTAINED FROM, OR AROSE OUT
 * OF THE RESULTS OF, OR USE OF, THE SOFTWARE OR SERVICES PROVIDED HEREUNDER.
 */

package gov.nist.secauto.metaschema.databind.model;

import java.lang.reflect.Method;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;

final class ClassIntrospector {
  private ClassIntrospector() {
    // disable construction
  }

  public static List<Method> getMatchingMethods(Class<?> clazz, String name, Class<?>... parameterTypes) {

    List<Method> retval = new LinkedList<>();
    Class<?> searchClass = clazz;
    do {
      try {
        Method method = searchClass.getDeclaredMethod(name, parameterTypes);
        retval.add(method);
      } catch (NoSuchMethodException ex) {
        // do nothing, no matching method was found
      }
    } while ((searchClass = searchClass.getSuperclass()) != null);

    return retval.isEmpty() ? Collections.emptyList() : Collections.unmodifiableList(retval);
  }

  public static Method getMatchingMethod(Class<?> clazz, String name, Class<?>... parameterTypes) {
    Method retval = null;
    Class<?> searchClass = clazz;
    do {
      try {
        retval = searchClass.getDeclaredMethod(name, parameterTypes);
        // stop on first found method
        break;
      } catch (NoSuchMethodException ex) {
        // do nothing, no matching method was found
      }
    } while ((searchClass = searchClass.getSuperclass()) != null);

    return retval;
  }
}