/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
 * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
 */
package org.hibernate.internal.util.beans;
import java.beans.BeanInfo;
import java.beans.IntrospectionException;
import java.beans.Introspector;
import java.lang.reflect.InvocationTargetException;

Utility for helping deal with BeanInfo
Author:Steve Ebersole
/** * Utility for helping deal with {@link BeanInfo} * * @author Steve Ebersole */
public class BeanInfoHelper { public static interface BeanInfoDelegate { public void processBeanInfo(BeanInfo beanInfo) throws Exception; } public static interface ReturningBeanInfoDelegate<T> { public T processBeanInfo(BeanInfo beanInfo) throws Exception; } private final Class beanClass; private final Class stopClass; public BeanInfoHelper(Class beanClass) { this( beanClass, Object.class ); } public BeanInfoHelper(Class beanClass, Class stopClass) { this.beanClass = beanClass; this.stopClass = stopClass; } public void applyToBeanInfo(Object bean, BeanInfoDelegate delegate) { if ( ! beanClass.isInstance( bean ) ) { throw new BeanIntrospectionException( "Bean [" + bean + "] was not of declared bean type [" + beanClass.getName() + "]" ); } visitBeanInfo( beanClass, stopClass, delegate ); } public static void visitBeanInfo(Class beanClass, BeanInfoDelegate delegate) { visitBeanInfo( beanClass, Object.class, delegate ); } public static void visitBeanInfo(Class beanClass, Class stopClass, BeanInfoDelegate delegate) { try { BeanInfo info = Introspector.getBeanInfo( beanClass, stopClass ); try { delegate.processBeanInfo( info ); } catch ( RuntimeException e ) { throw e; } catch ( InvocationTargetException e ) { throw new BeanIntrospectionException( "Error delegating bean info use", e.getTargetException() ); } catch ( Exception e ) { throw new BeanIntrospectionException( "Error delegating bean info use", e ); } finally { Introspector.flushFromCaches( beanClass ); } } catch ( IntrospectionException e ) { throw new BeanIntrospectionException( "Unable to determine bean info from class [" + beanClass.getName() + "]", e ); } } public static <T> T visitBeanInfo(Class beanClass, ReturningBeanInfoDelegate<T> delegate) { return visitBeanInfo( beanClass, null, delegate ); } public static <T> T visitBeanInfo(Class beanClass, Class stopClass, ReturningBeanInfoDelegate<T> delegate) { try { BeanInfo info = Introspector.getBeanInfo( beanClass, stopClass ); try { return delegate.processBeanInfo( info ); } catch ( RuntimeException e ) { throw e; } catch ( InvocationTargetException e ) { throw new BeanIntrospectionException( "Error delegating bean info use", e.getTargetException() ); } catch ( Exception e ) { throw new BeanIntrospectionException( "Error delegating bean info use", e ); } finally { Introspector.flushFromCaches( beanClass ); } } catch ( IntrospectionException e ) { throw new BeanIntrospectionException( "Unable to determine bean info from class [" + beanClass.getName() + "]", e ); } } }