Hibernate example source code file (ReflectionHelper.java)

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

Java - Hibernate tags/keywords

bean, field, field, javabean, method, method, reflection, reflectionhelper, reflectionhelper, string, string

The Hibernate ReflectionHelper.java source code

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2011, Red Hat Inc. or third-party contributors as
 * indicated by the @author tags or express copyright attribution
 * statements applied by the authors.  All third-party contributions are
 * distributed under license by Red Hat Inc.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */
package org.hibernate.metamodel.source.annotations;

import java.beans.Introspector;
import java.lang.reflect.Field;
import java.lang.reflect.Member;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;

/**
 * Some helper methods for reflection tasks
 *
 * @author Hardy Ferentschik
 */
public class ReflectionHelper {

	private 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}
	 *         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( "has" ) ) {
				name = Introspector.decapitalize( methodName.substring( 3 ) );
			}
			else if ( methodName.startsWith( "get" ) ) {
				name = Introspector.decapitalize( methodName.substring( 3 ) );
			}
		}
		return name;
	}

	public static boolean isProperty(Member m) {
		if ( m instanceof Method ) {
			Method method = (Method) m;
			return !method.isSynthetic()
					&& !method.isBridge()
					&& !Modifier.isStatic( method.getModifiers() )
					&& method.getParameterTypes().length == 0
					&& ( method.getName().startsWith( "get" ) || method.getName().startsWith( "is" ) );
		}
		else {
			return !Modifier.isTransient( m.getModifiers() ) && !m.isSynthetic();
		}
	}
}