Johan Compagner wrote:
> Hi,
>
> I myself really need this implementation so i am hoping that it can be inserted in
>Struts 1.0.
> If not then i must alway's use a slightly altered struts version :-(
>
Johan, it is not clear to me what you're trying to accomplish with these changes. Is
it just that you only want
a subset of the properties available to be retrieved or set through PropertyUtils? If
so, you might investigate
using a BeanInfo class along with your form bean. This allows you to customize the
set of properties available
-- and even change method names if you want to. The Java introspection logic fully
supports this, so it will get
used automatically by PropertyUtils.
See the JavaBeans specification for more info, at:
http://java.sun.com/products/javabeans/docs/spec.html
Craig
>
> What i want:
>
> I want to control my own implementation of getting and setting property's for a
>specifiek bean of mine
> when using struts. The bean i want to control the setting and getting of properties
>is a Form bean of mine
> so i need to alter struts it self because struts uses PropertyUtils for this. I
>can't have a get and set for
> every property.
>
> What i altered:
>
> I inserted a Interface in the struts.util package:
>
> public interface Property
> {
> public Object getProperty(String);
> public void setProperty(String,object);
> }
>
> So if a bean wants to control it's own property's it must implement that interface.
>
> PropertyUtils.getSimpleProperty(Object bean, String name){
> if(bean instanceof Property) {
> return ((Property)bean).getProperty(name);
> }
> else {
> // CURRENT IMPLEMENTATION.
> }
> }
>
> and
>
> PropertyUtils.setSimpleProperty(Object bean, String name, Object value){
> if(bean instanceof Property) {
> ((Property)bean).setProperty(name, value);
> }
> else {
> // CURRENT IMPLEMENTATION.
> }
> }
>
> I only implemented the SimpleProperty at this time, maybe the same should be done
>with indexed.
> But if a bean implements the Property Interface the PropertyUtils class is relaying
>this to
> the bean it self.
>
> Also the BeanUtils.populate(Object bean, Map properties) had to change a bit because
> that method is trying to get the PropertyDescriptor for a given name and it none is
>found
> it won't call the PropertyUtils.setProperty(bean, name, parameters[0]);
>
> the method:
>
> // Loop through the property name/value pairs to be set
> Iterator names = properties.keySet().iterator();
>
> if(bean instanceof Property) {
> while (names.hasNext()) {
> String name = (String) names.next();
> if (name == null) continue;
> Object value = properties.get(name); // String or String[]
> Object parameters[] = new Object[1];
> if (value instanceof String[]) {
> parameters[0] = ((String[])value)[0];
> }
> else {
> parameters[0] = value;
> }
> try{
> PropertyUtils.setProperty(bean, name, parameters[0]);
> }
> catch (NoSuchMethodException e) {
> if (debug >= 1) {
> System.out.println(" CANNOT HAPPEN: " + e);
> e.printStackTrace(System.out);
> }
> }
> }
> }
> else{
> while (names.hasNext()) {
> // CURRENT IMPLEMENTATION
> }
> }
>
> I attached all the files.
>
> Johan Compagner
>
> --------------------------------------------------------------------------------
> Name: PropertyUtils.java
> PropertyUtils.java Type: unspecified type (application/octet-stream)
> Encoding: quoted-printable
>
> Name: Property.java
> Property.java Type: unspecified type (application/octet-stream)
> Encoding: 7bit
>
> Name: BeanUtils.java
> BeanUtils.java Type: unspecified type (application/octet-stream)
> Encoding: quoted-printable
