OK. Here is an example of page class that he has. Abstract methods are
getters and setters. Same methods are referenced in corresponding .page
file, also listed below. I am absolutely clueless as to what would be
the reason for leaving this methods abstract.
I would imagine tapestry will do enhancing to wrap implementations of
setters to know if object has to be stored in session, but why would you
want to leave methods and class abstract and not have class that
implements it?
I am pondering if he uses some code generation to create java beans that
are domain objects used with hibernate, but I do not see any evidence of
that anywhere in the source tree or build files.
package org.apache.tapestry.pets.presentation.pages;
import johnmammen.betterpetshop.service.PetshopManager;
import org.apache.tapestry.IRequestCycle;
import org.apache.tapestry.event.PageEvent;
import org.apache.tapestry.event.PageRenderListener;
import org.apache.tapestry.pets.PetshopBasePage;
import org.apache.tapestry.pets.domain.model.IProduct;
import org.apache.tapestry.pets.presentation.components.PagedModel;
public abstract class CategoryPage extends PetshopBasePage implements
PageRenderListener {
//for getting the petshop service
public abstract PetshopManager getPetshopService();
public void pageBeginRender(PageEvent event) {
if (getModel() == null)
setModel(new PagedModel());
if (getCategory() != null) {
//getting the petshop service
setProductList(getPetshopService().findByCategory(getCategory()));
}
}
public void selectItem(IRequestCycle cycle) {
Object[] parameters = cycle.getServiceParameters();
String prodid = ((String) parameters[0]);
String prodname = ((String) parameters[1]);
ProductCategoryPage productcategory = (ProductCategoryPage) cycle
.getPage("ProductCategory");
productcategory.setProdID(prodid);
productcategory.setProdName(prodname);
cycle.activate(productcategory);
}
public void directJumpToPage(IRequestCycle cycle) {
Object[] parameters = cycle.getServiceParameters();
int page = ((Integer) parameters[0]).intValue();
int pCount = ((Integer) parameters[1]).intValue();
setCategory((String) parameters[2]);
PagedModel nmodel = new PagedModel();
nmodel.setPageCount(pCount);
nmodel.setPageToShow(page);
setModel(nmodel);
}
public abstract void setCategory(String value);
public abstract String getCategory();
public abstract void setProductList(IProduct[] productList);
public abstract IProduct[] getProductList();
public abstract int getProductPage();
public abstract void setProductPage(int productPage);
public abstract IProduct getProduct();
public abstract void setProduct(IProduct product);
public abstract PagedModel getModel();
public abstract void setModel(PagedModel model);
}
<?xml version="1.0"?>
<!DOCTYPE page-specification PUBLIC
"-//Apache Software Foundation//Tapestry Specification 3.0//EN"
"http://jakarta.apache.org/tapestry/dtd/Tapestry_3_0.dtd";>
<page-specification
class="org.apache.tapestry.pets.presentation.pages.CategoryPage">
<property-specification name="category" type="java.lang.String"/>
<property-specification name="product"
type="org.apache.tapestry.pets.domain.model.IProduct"/>
<property-specification name="productList"
type="org.apache.tapestry.pets.domain.model.IProduct[]"/>
<property-specification name="productPage" type="int"/>
<property-specification name="model"
type="org.apache.tapestry.pets.presentation.components.PagedModel"/>
<property-specification name="petshopService"
type="johnmammen.betterpetshop.service.PetshopManager">
global.appContext.getBean("petshopService")
</property-specification>
</page-specification>
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