For Newbie.... Like me guide...
Reference:
http://jumpstart.doublenegative.com.au:8080/jumpstart/examples/select/easyid
Select ID
Index.tml
<form t:type="form">
Person: <select t:type="select" t:model="personIds"
t:value="personId"></select>
<input type="submit" value="Submit"/>
You chose personId: ${personId}
</form>
Index.java
import com.dash.tapestryselect2.model.IdSelectModel;
import com.dash.tapestryselect2.model.Userbean;
import java.util.ArrayList;
import java.util.Date;
import org.apache.tapestry5.annotations.Property;
import org.apache.tapestry5.ioc.annotations.Inject;
import org.apache.tapestry5.ioc.services.PropertyAccess;
public class Index
{
public Date getCurrentTime()
{
return new Date();
}
// The activation context
@Property
private Long personId;
// Screen fields
@SuppressWarnings("unused")
@Property
private IdSelectModel<Userbean> personIds;
@Inject
private PropertyAccess _propertyAccess;
// The code
Long onPassivate() {
return personId;
}
void onActivate(Long personId1) {
personId = personId1;
}
// Form triggers the PREPARE event during form render and form
submission.
void onPrepare() {
// Get all persons - ask business service to find them (from
the database)
ArrayList<Userbean> persons = new ArrayList<Userbean>();
persons.add(new Userbean(Long.valueOf(1),"Mirko","Mirko"));
persons.add(new
Userbean(Long.valueOf(2),"Slavko","Slavko"));
persons.add(new Userbean(Long.valueOf(3),"Jozo","Jozo"));
personIds = new IdSelectModel<Userbean>(persons, Userbean.class,
"username", "uid", _propertyAccess);
}
}
IdSelectModel.java
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package com.dash.tapestryselect2.model;
import java.util.ArrayList;
import java.util.List;
import org.apache.tapestry5.OptionGroupModel;
import org.apache.tapestry5.OptionModel;
import org.apache.tapestry5.internal.OptionModelImpl;
import org.apache.tapestry5.ioc.services.PropertyAccess;
import org.apache.tapestry5.ioc.services.PropertyAdapter;
import org.apache.tapestry5.util.AbstractSelectModel;
public class IdSelectModel<T> extends AbstractSelectModel {
private List<T> list;
private PropertyAdapter labelFieldAdapter;
private PropertyAdapter idFieldAdapter;
/**
* @param list the list of objects you want modeled in a Select
component.
These objects MUST implement
* equals(Object obj) and hashCode(). If the objects are JPA
entities, ensure their implementations of
* equals(Object obj) and hashCode() return the same thing for
different instances of the same detached
* entity.
* @param clazz the class of objects in the list.
* @param labelField the name of the field you want displayed as the
label
in the selection list, eg. "name".
* @param idField the name of the field which is the unique identifier
of
each object in the list, eg. "id". This is
* used in the value property of the Select component.
* @param access Declare a PropertyAccess injected into your page (eg.
* @Inject private PropertyAccess _access) then pass it in here.
*
*/
public IdSelectModel(List<T> list, Class<T> clazz, String labelField,
String idField, PropertyAccess access) {
if (clazz == null) {
throw new IllegalArgumentException("clazz is
required.");
}
if (idField == null) {
throw new IllegalArgumentException("idField is
required.");
}
if (labelField == null) {
throw new IllegalArgumentException("labelField is
required.");
}
this.list = list;
this.idFieldAdapter =
access.getAdapter(clazz).getPropertyAdapter(idField);
this.labelFieldAdapter =
access.getAdapter(clazz).getPropertyAdapter(labelField);
if (idFieldAdapter == null) {
throw new IllegalArgumentException("idField " + idField
+ " does not
exist in class " + clazz + ".");
}
if (labelFieldAdapter == null) {
throw new IllegalArgumentException("labelField " +
idField + " does not
exist in class " + clazz + ".");
}
}
public List<OptionGroupModel> getOptionGroups() {
return null;
}
public List<OptionModel> getOptions() {
List<OptionModel> optionModelList = new
ArrayList<OptionModel>();
for (T obj : list) {
optionModelList.add(new
OptionModelImpl(nvl(labelFieldAdapter.get(obj)),
idFieldAdapter.get(obj)));
}
return optionModelList;
}
public List<T> getList() {
return list;
}
private String nvl(Object o) {
if (o == null)
return "";
else
return o.toString();
}
}
Userbean.java
public class Userbean {
Long uid;
String username;
String userpassword;
public Userbean(Long uid, String username, String userpassword) {
this.uid = uid;
this.username = username;
this.userpassword = userpassword;
}
public Long getUid() {
return uid;
}
public void setUid(Long uid) {
this.uid = uid;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getUserpassword() {
return userpassword;
}
public void setUserpassword(String userpassword) {
this.userpassword = userpassword;
}
}
Note: This example will use the select component of Tapestry5 then will
return the ID.
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