Examples of org.apache.commons.beanutils.PropertyUtilsBean

org.apache.commons.beanutils.PropertyUtilsBean
Utility methods for using Java Reflection APIs to facilitate generic property getter and setter operations on Java objects. Much of this code was originally included in BeanUtils, but has been separated because of the volume of code involved.
In general, the objects that are examined and modified using these methods are expected to conform to the property getter and setter method naming conventions described in the JavaBeans Specification (Version 1.0.1). No data type conversions are performed, and there are no usage of any PropertyEditor classes that have been registered, although a convenient way to access the registered classes themselves is included.
For the purposes of this class, five formats for referencing a particular property value of a bean are defined, with the default layout of an identifying String in parentheses. However the notation for these formats and how they are resolved is now (since BeanUtils 1.8.0) controlled by the configured {@link Resolver} implementation:
- Simple (name) - The specified name identifies an individual property of a particular JavaBean. The name of the actual getter or setter method to be used is determined using standard JavaBeans instrospection, so that (unless overridden by a BeanInfo class, a property named "xyz" will have a getter method named getXyz() or (for boolean properties only) isXyz(), and a setter method named setXyz().
- Nested (name1.name2.name3) The first name element is used to select a property getter, as for simple references above. The object returned for this property is then consulted, using the same approach, for a property getter for a property named name2, and so on. The property value that is ultimately retrieved or modified is the one identified by the last name element.
- Indexed (name[index]) - The underlying property value is assumed to be an array, or this JavaBean is assumed to have indexed property getter and setter methods. The appropriate (zero-relative) entry in the array is selected. List objects are now also supported for read/write. You simply need to define a getter that returns the List
- Mapped (name(key)) - The JavaBean is assumed to have an property getter and setter methods with an additional attribute of type java.lang.String.
- Combined (name1.name2[index].name3(key)) - Combining mapped, nested, and indexed references is also supported.
@author Craig R. McClanahan @author Ralph Schaer @author Chris Audley @author Rey Francois @author Gregor Rayman @author Jan Sorensen @author Scott Sanders @author Erik Meade @version $Revision: 687190 $ $Date: 2008-08-19 23:51:19 +0100 (Tue, 19 Aug 2008) $ @see Resolver @see PropertyUtils @since 1.7


    @Test
    public void testDigester()
        throws IOException, SAXException
    {
        PropertyUtilsBean propertyUtils = new MyPropertyUtilsBean();
        ConvertUtilsBean convertUtils = new ConvertUtilsBean();
        BeanUtilsBean beanUtils = new BeanUtilsBean( convertUtils, propertyUtils );
        BeanUtilsBean.setInstance( beanUtils );


        final String xml = "<myclass flag='true' />";

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     */
    private static List<String> getJPACopierFields(Object bean)
            throws IllegalAccessException, NoSuchMethodException,
            InvocationTargetException {


        PropertyUtilsBean propertyUtilsBean =
                BeanUtilsBean.getInstance().getPropertyUtils();


        List<String> properties = Lists.newCopyOnWriteArrayList();


        // TODO: replace HibernateProxyHelper as its being phased out
        Class noProxyBean =
                HibernateProxyHelper.getClassWithoutInitializingProxy(bean);


        Map<String, Object> propertiesMap = propertyUtilsBean.describe(bean);


        for (String property : propertiesMap.keySet()) {
            // Read annotate in Field or Getter method of property
            try {
                PropertyDescriptor descriptor = propertyUtilsBean
                        .getPropertyDescriptor(bean, property);


                String methodName =
                        propertyUtilsBean.getReadMethod(descriptor).getName();


                Method getterMethod = noProxyBean.getMethod(methodName);
                if (isUseJPACopier(getterMethod)) {
                    properties.add(property);
                    continue;

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            // instance is null for anonymous class, use default type
          }
        } catch (NoSuchFieldException e1) {
            try {
                BeanUtilsBean beanUtilsBean = BeanUtilsBean.getInstance();
                PropertyUtilsBean propertyUtils = beanUtilsBean.getPropertyUtils();
                return propertyUtils.getPropertyType(instance, propertyName);                    
            } catch (Exception e2) {
                // nothing
            }
        } catch (Exception e) {
          // ignore other exceptions

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            if (log.isTraceEnabled())
                log.trace(bean.getClass().getName() + ": getting property '" + property + "' for column " + column.getName());
            */
            
            // Get Property Value
            PropertyUtilsBean pub = BeanUtilsBean.getInstance().getPropertyUtils();
            Object value = pub.getSimpleProperty(bean, property);


            // Now, set the record value
            setValue( column, value ); 


        } catch (IllegalAccessException e)

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            throw new InvalidArgumentException("bean", bean);
        if (property==null)
            throw new InvalidArgumentException("property", property);
        try
        {   // Get Property Value
            PropertyUtilsBean pub = BeanUtilsBean.getInstance().getPropertyUtils();
            return pub.getSimpleProperty(bean, property);


        } catch (IllegalAccessException e)
        {   log.error(bean.getClass().getName() + ": unable to get property '" + property + "'");
            throw new BeanPropertyGetException(bean, property, e);
        } catch (InvocationTargetException e)

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        cub.register(new IntegerArrayConverter(), Integer[].class);


        // BigDecimal, BigInteger, Class, Date, String, Time, TimeStamp
        // do not use defaults in the default configuration of ConvertUtilsBean


        return new BeanUtilsBean(cub, new PropertyUtilsBean());
    }

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