You are viewing a plain text version of this content. The canonical link for it is here.
Posted to users@wicket.apache.org by Ondrej Zizka <oz...@redhat.com> on 2012/09/18 04:09:18 UTC
Auto PageParameters from a POJO?
Hi,
I found myself repeatedly creating a PageParameters object from some
domain object for BookmarkablePageLink just to have it then "parsed"
back to that same domain object.
Example:
Release rel { product: AS; version: 7.1.2 }
=>
add( new BookmarkablePageLink ( "link", ReleasePage.class, new
PageParameters()
.add("product", rel.getProduct().getName())
.add("version", rel.getVersion() )
) );
So to avoid repeating that all the time, I created (besides a link
component) this in ReleasePage:
public static PageParameters createPageParameters( Release rel ){
return new PageParameters()
.add("product", rel.getProduct().getName())
.add("version", rel.getVersion() );
}
And I was thinking - is there some mechanism to automatically create the
params from the domain object, using properties matching against mount()
string?
E.g. like this:
mountPage("/release/${product.name}/${version}", ReleasePage.class);
new BookmarkablePageLink ( "link", ReleasePage.class, rel); //
This would create page params the properties.
Anything like this available? If not, is it doable? It would reduce
quite some boilerplate code.
Thanks,
Ondra
Re: Auto PageParameters from a POJO?
Posted by Martin Grigorov <mg...@apache.org>.
Hi,
On Tue, Sep 18, 2012 at 5:09 AM, Ondrej Zizka <oz...@redhat.com> wrote:
> Hi,
>
> I found myself repeatedly creating a PageParameters object from some
> domain object for BookmarkablePageLink just to have it then "parsed"
> back to that same domain object.
> Example:
>
> Release rel { product: AS; version: 7.1.2 }
> =>
> add( new BookmarkablePageLink ( "link", ReleasePage.class, new
> PageParameters()
> .add("product", rel.getProduct().getName())
> .add("version", rel.getVersion() )
> ) );
>
> So to avoid repeating that all the time, I created (besides a link
> component) this in ReleasePage:
>
> public static PageParameters createPageParameters( Release rel ){
> return new PageParameters()
> .add("product", rel.getProduct().getName())
> .add("version", rel.getVersion() );
> }
>
> And I was thinking - is there some mechanism to automatically create the
> params from the domain object, using properties matching against mount()
> string?
> E.g. like this:
>
> mountPage("/release/${product.name}/${version}", ReleasePage.class);
> new BookmarkablePageLink ( "link", ReleasePage.class, rel); //
> This would create page params the properties.
>
> Anything like this available? If not, is it doable? It would reduce
> quite some boilerplate code.
No, there is no such functionality in Wicket.
Whether it is doable - yes, everything is doable. But your approach is
much more simpler.
If something like this should be in the framework then
BookmarkablePageLink (and other clients of this API) should use a
helper that will have to find the respective IRequestMapper that is
responsible for that page, then this mapper will have to expose some
of its internals to be able to read its page class and named
parameters placeholders and finally it should use some Expression
Language parser to match the placeholders against the passed POJO ...
You see that it is much more complex.
>
> Thanks,
> Ondra
>
>
--
Martin Grigorov
jWeekend
Training, Consulting, Development
http://jWeekend.com
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
For additional commands, e-mail: users-help@wicket.apache.org
Re: Auto PageParameters from a POJO?
Posted by Thomas Götz <to...@decoded.de>.
Roll your own, e.g. using commons BeanUtils:
import junit.framework.Assert;
import org.apache.commons.beanutils.BeanUtils;
import org.apache.wicket.request.mapper.parameter.INamedParameters;
import org.apache.wicket.request.mapper.parameter.PageParameters;
import org.junit.Test;
import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;
public class PageParametersTest {
@Test
public void testPageParameters() {
// toPageParameters
MyBean bean = new MyBean("foo", "bar");
final PageParameters pageParameters = toPageParameters(bean);
Assert.assertEquals(2, pageParameters.getNamedKeys().size());
Assert.assertEquals("foo", pageParameters.get("foo").toString());
Assert.assertEquals("bar", pageParameters.get("bar").toString());
// repopulate
MyBean newBean = new MyBean();
populate(newBean, pageParameters);
Assert.assertEquals("foo", newBean.getFoo());
Assert.assertEquals("bar", newBean.getBar());
}
public static PageParameters toPageParameters(Object object) {
final PageParameters params = new PageParameters();
try {
final Map map = BeanUtils.describe(object);
for (Object key : map.keySet()) {
if (!"class".equals(key)) // We don't want the result of getClass()
params.set((String) key, map.get(key));
}
} catch (Exception e) {
e.printStackTrace();
}
return params;
}
public static void populate(Object bean, PageParameters parameters) {
final Map<String, Object> map = new HashMap<String, Object>();
for (INamedParameters.NamedPair namedPair : parameters.getAllNamed()) {
map.put(namedPair.getKey(), namedPair.getValue());
}
try {
BeanUtils.populate(bean, map);
} catch (Exception e) {
e.printStackTrace();
}
}
public class MyBean implements Serializable {
private String foo;
private String bar;
public MyBean() {
}
public MyBean(String foo, String bar) {
this.foo = foo;
this.bar = bar;
}
public String getBar() { return bar; }
public void setBar(String bar) { this.bar = bar; }
public String getFoo() { return foo; }
public void setFoo(String foo) { this.foo = foo; }
}
}
-Tom
On 18.09.2012, at 04:09, Ondrej Zizka <oz...@redhat.com> wrote:
> And I was thinking - is there some mechanism to automatically create the
> params from the domain object, using properties matching against mount()
> string?
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
For additional commands, e-mail: users-help@wicket.apache.org
Re: Auto PageParameters from a POJO?
Posted by vineet semwal <vi...@gmail.com>.
you can create some reusable bookmarkablelink like below
public class ReleaseBookmarkablePageLink extends BookmarkablePageLink{
private Release release;
public ReleaseBookmarkablePageLink(String id,Class<? extends
Page>pageClass,Release release){
super(id,pageClass);
this.release=release;
}
@Override
protected void onInitialize() {
super.onInitialize();
getPageParameters().set("product",
release.getProduct().getName()) ;
getPageParameters().set("version", release.getVersion() );
}
}
if you don't want to serialize release object,you can just serialize
it's key and retrieve release object from it
On Tue, Sep 18, 2012 at 7:39 AM, Ondrej Zizka <oz...@redhat.com> wrote:
> Hi,
>
> I found myself repeatedly creating a PageParameters object from some
> domain object for BookmarkablePageLink just to have it then "parsed"
> back to that same domain object.
> Example:
>
> Release rel { product: AS; version: 7.1.2 }
> =>
> add( new BookmarkablePageLink ( "link", ReleasePage.class, new
> PageParameters()
> .add("product", rel.getProduct().getName())
> .add("version", rel.getVersion() )
> ) );
>
> So to avoid repeating that all the time, I created (besides a link
> component) this in ReleasePage:
>
> public static PageParameters createPageParameters( Release rel ){
> return new PageParameters()
> .add("product", rel.getProduct().getName())
> .add("version", rel.getVersion() );
> }
>
> And I was thinking - is there some mechanism to automatically create the
> params from the domain object, using properties matching against mount()
> string?
> E.g. like this:
>
> mountPage("/release/${product.name}/${version}", ReleasePage.class);
> new BookmarkablePageLink ( "link", ReleasePage.class, rel); //
> This would create page params the properties.
>
> Anything like this available? If not, is it doable? It would reduce
> quite some boilerplate code.
>
> Thanks,
> Ondra
>
>
--
regards,
Vineet Semwal
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
For additional commands, e-mail: users-help@wicket.apache.org