Process bean properties getter by applying the JavaBean naming conventions. : JavaBeans « Development « Java Tutorial

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// $Id: ReflectionHelper.java 16271 2009-04-07 20:20:12Z hardy.ferentschik $
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* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* 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.
*/


import java.beans.Introspector;
import java.lang.annotation.Annotation;
import java.lang.reflect.AccessibleObject;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Member;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.lang.reflect.WildcardType;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import java.util.Map;


/**
 * Some reflection utility methods.
 *
 * @author Hardy Ferentschik
 */
public class ReflectionHelper {


  /**
   * Process bean properties getter by applying the JavaBean naming conventions.
   *
   * @param member the member for which to get the property name.
   *
   * @return The bean method name with the "is" or "get" prefix stripped off, <code>null</code>
   *         the method name id not according to the JavaBeans standard.
   */
  public static String getPropertyName(Member member) {
    String name = null;

    if ( member instanceof Field ) {
      name = member.getName();
    }

    if ( member instanceof Method ) {
      String methodName = member.getName();
      if ( methodName.startsWith( "is" ) ) {
        name = Introspector.decapitalize( methodName.substring( 2 ) );
      }
      else if ( methodName.startsWith( "get" ) ) {
        name = Introspector.decapitalize( methodName.substring( 3 ) );
      }
    }
    return name;
  }

}