Re: Help: and form input fields
My orderform bean has public OrderItem getItems(int index ) // this is used during the setProperty... public ArrayList getItems() // This is used by the iterate tag public void setItems(int index,OrderItem str) public void setItems(ArrayList arr) My OrderItem bean has public String getItemName() public String getQuantity() public void setItemName(String str) public void setQuantity(String str) Hope that helps... -Chandan. -Original Message-From: Mishkin Berteig <[EMAIL PROTECTED]>To: [EMAIL PROTECTED] <[EMAIL PROTECTED]>Date: Friday, January 05, 2001 12:05 PMSubject: Re: Help: and form input fieldsHow does your orderform bean look? What are the method signatures for the items property? Thanks, Mishkin.
Re: Help: and form input fields
I have this working now...
Here's how I got this working
I'm including my BeanUtils.java.
Here's how my jsp looks (the does not work
as expected...I had to use the input tag...)
Item Name
Quantity
<% int count=0; %>
" value="<%=
((OrderItem)orderlist).getItemName() %>" />
" value="<%=
((OrderItem)orderlist).getQuantity() %>" />
The name is the nested and indexed name. The value field needs
to be explicitly set to get the value from the bean.
The changes I made to BeanUtils.java is
I commented out this code in
public static void populate(Object bean, String prefix, String
suffix, HttpServletRequest request)
/*
CK: int
subscript =
stripped.lastIndexOf("[");
if (subscript >= 0) // Remove subscript
expression
stripped = stripped.substring(0,
subscript);
CK: */
This keeps the indexed part of the name
And then in public static void
populate(Object bean, Hashtable properties)
Added this code
// Check to see if
the name is nested or indexed - then use
PropertyUtils.setProperty int indexed =
name.lastIndexOf("["); int nested =
name.lastIndexOf(".");
if ((indexed >= 0) || (nested >= 0)) { try
{ PropertyUtils.setProperty( bean, name,
Array.get(value, 0)); } catch(
java.lang.NoSuchMethodException e )
{ }
continue; }
To handle the nested and indexed names by calling
PropertyUtils.setProperty...
Good luck,
-Chandan
Kulkarni.
-Original Message-From:
Mishkin Berteig <[EMAIL PROTECTED]>To: [EMAIL PROTECTED]
<[EMAIL PROTECTED]>Cc:
Chandan Kulkarni <[EMAIL PROTECTED]>Date:
Thursday, January 04, 2001 10:43 PMSubject: Re: Help:
and form input fieldsActually, I
think I can add some clarification to this issue as I am encountering what I
see as a similar problem.
The basic goal is to create a form where there are a variable number of
entries, all of which are the same type. The number of entries is
determined at run-time, for example from rows in a database table.
An example scenario would look something like this.
Your Shopping Cart:
ITEM:
QUANTITY: Pencil
1___ Eraser
1___ Cheese
1___
(The quantities are text fields.) The list of items is generated at
run-time from the things a person has clicked into their shopping cart, and
the quantities are set at check-out time (by the user).
The problem is that the iterate and form tags dont seem to work together
for indexed properties. This is partially a problem with the underlying
html. Each text field in a form needs a different name. In order
to have these fields correspond to a specific index value in an indexed
property, the names of the fields need to be parsed. The html might look
something like this:
ITEM:Quantity
Pencil
Pencil
Pencil
...
When the submit button was hit, the request parameters would be parsed.
I have just started working on this problem.
Mishkin.
Chandan Kulkarni wrote:
Yes...same idea...
-Original Message-
From: Ted Husted <[EMAIL PROTECTED]>
To: Struts List <[EMAIL PROTECTED]>
Date: Wednesday, December 27,
2000 10:36 AM Subject:
Re: Help: and form input fields
Are you trying to do something like this order
form (Javascript) https://public.wxxi.org/schedules/fm/voice-order.htm This only shows one item, but the idea is that
there would be one line for each item in a small
inventory. -- Ted Husted, Husted dot Com, Fairport NY USA.
-- Custom Software ~ Technical Services.
-- Tel 716 425-0252; Fax 716 223-2506.
-- http://www.husted.com/
/*
* $Header: /home/cvspublic/jakarta-struts/src/share/org/apache/struts/util/BeanUtils.java,v 1.15 2000/11/13 17:31:05 mschachter Exp $
* $Revision: 1.15 $
* $Date: 2000/11/13 17:31:05 $
*
*
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
*notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
*notice, this list of conditions and the following disclaimer in
*the documentation and/or other materials provided with the
*distribution.
*
Re: PropertyUtils handling multiple getter methods
Thanks for the explanation...
I mistyped in my mail before - I did have 2 getters for the
getItems(), one simple and one indexed.
After writing the mail I did write a test and I did
figure out I had misunderstood the code getPropertyDescriptors gets one
descriptor for each property - not 2 if there are 2
getters...
It turns out the only changes I need to make are to
BeanUtils.java to handle setting of indexed and
nested properties within a
Thanks again,
-Chandan.
-Original Message-From:
Craig R. McClanahan <[EMAIL PROTECTED]>To:
[EMAIL PROTECTED]
<[EMAIL PROTECTED]>Cc:
[EMAIL PROTECTED]
<[EMAIL PROTECTED]>;
Chandan Kulkarni <[EMAIL PROTECTED]>Date:
Thursday, December 28, 2000 5:04 PMSubject: Re: PropertyUtils
handling multiple getter methodsSee below.
Chandan Kulkarni wrote:
I had a question about this
part of PropertyUtils.java. public
static PropertyDescriptor getPropertyDescriptor(Object bean,
String name) PropertyDescriptor descriptors[] =
getPropertyDescriptors(bean); if (descriptors == null) return (null);
for (int i = 0; i <
descriptors.length; i++) { if
(name.equals(descriptors[i].getName()))
return (descriptors[i]);
}The method
getPropertyDescriptorcalls
getPropertyDescriptors(bean)and iterates through them to get a match on the
name. Incase the Bean class
contains ArrayList items; It requires to have 2 getItems methods 1) ArrayList
getItems() - to be used when you use
the
2) It also
requires an indexed getter Item
getItem(int index) to handle the form input fields within
the iterate tag. If you find the wrong descriptor
first, you get a NoSuchMethodExceptionI propose getPropertyDescriptor take
another parameter (which says whether its an Indexedproperty we are looking
for) or create anothergetIndexedPropertyDescriptor. I'll probably do that to handle nested, indexed properties to get
to work... -Chandan.
PropertyUtils is using the standard JavaBeans introspection under the
covers, in order to identify the actual method names of the getters and
setters. In particular, you are required to use the property naming
conventions outlined in the JavaBeans specification, version 1.0.1.
In your example above, you are using two different property names ("items"
versus "item"), so the introspection code will consider those to be two
different properties. It is legal to provide both array-based and
index-based getters and setters for the same property, but you must use the
same name -- for example:
Item[] getItems(); Item
getItems(int index); void setItems(Item items[]);
void setItems(int index, Item item);
If you do this, PropertyUtils uses the following algorithm to retrieve an
indexed property value at a particular subscript: * If there is an indexed
getter (Item getItems(int index)), call it directly *
Otherwise, call the array getter (Item[] getItems()) and access the
requested element out of the array.
Craig McClanahan
PropertyUtils handling multiple getter methods
I had a question about this part of
PropertyUtils.java.
public static PropertyDescriptor getPropertyDescriptor(Object
bean,
String name)
PropertyDescriptor descriptors[] =
getPropertyDescriptors(bean); if (descriptors ==
null) return
(null); for (int i = 0; i < descriptors.length;
i++) { if
(name.equals(descriptors[i].getName()))
return
(descriptors[i]); }
The method getPropertyDescriptor
calls
getPropertyDescriptors(bean)
and iterates through them to get a match on the
name.
Incase the Bean class contains
ArrayList items;
It requires to have 2 getItems methods
1) ArrayList getItems() - to be used when
you use the
2) It also requires an indexed getter
Item getItem(int
index)
to handle the form input fields within the
iterate tag.
If you find the wrong descriptor first, you get a
NoSuchMethodException
I propose getPropertyDescriptor take another parameter
(which says whether its an Indexed
property we are looking for) or create another
getIndexedPropertyDescriptor.
I'll probably do that to handle nested, indexed properties to
get to work...
-Chandan.
Re: Help: and form input fields
Yes...same idea... -Original Message-From: Ted Husted <[EMAIL PROTECTED]>To: Struts List <[EMAIL PROTECTED]>Date: Wednesday, December 27, 2000 10:36 AMSubject: Re: Help: and form input fields Are you trying to do something like this order form (Javascript) https://public.wxxi.org/schedules/fm/voice-order.htm This only shows one item, but the idea is that there would be one line for each item in a small inventory. -- Ted Husted, Husted dot Com, Fairport NY USA. -- Custom Software ~ Technical Services. -- Tel 716 425-0252; Fax 716 223-2506. -- http://www.husted.com/
Re: Help: and form input fields
I'm trying to use within a form that contains a Collection of OrderItems to create the appropriate input fields. Example Screen: Order Number: List of Items: Item Number Name Quantity -- - -- - -- - -- - -- - (where --- are form input fields) The bean the form uses is the OrderForm. It contains an ArrayList of OrderItems. An OrderItem is an object with 3 fields ItemNumber, Name, Quantity. Using to iterate over the ArrayList of OrderItems, and the struts form tags I am trying to generate the correct input lines for each OrderItem. Using ... does not work as required. It generate several lines with the same name for itemNumber for each item in the OrderItems ArrayList. When the form is submitted the struts framework cannot get the right values to set the OrderItems ArrayList with the correct values. Setting the OrderItems collection within the OrderForm bean is where the problem is... Getting values can be worked around by using value="<%= ((OrderItem)orderlist).getItemNumber() %>" /> (which I had showed below) Hope that helps -Chandan. -Original Message-From: Ted Husted <[EMAIL PROTECTED]>To: Struts List <[EMAIL PROTECTED]>Date: Wednesday, December 27, 2000 9:50 AMSubject: Re: Help: and form input fields A clear statement of what you need to accomplish, without posing a particular implementation, might be helpful. I'm not exactly sure what it is you need to do. My first guess is that the part about "count" should be encapsulated in a bean, and not exposed to the JSP. But I'm not sure if I understand the business or application logic behind your question well enough. *** REPLY SEPARATOR ***On 12/27/2000 at 8:51 AM Chandan Kulkarni wrote: Actually OrderItem is an object with several fields. I trimmed it down to just one field to simplify the problem. So "items" is an ArrayList of OrderItems. I couldn't find the right combination of nested/indexed property names for the form:text tag to generate the correct input tag. Here's what I tried... " value="<%= ((OrderItem)orderlist).getItemNumber() %>" /> When it can't find the correct property name in the bean it gives a compilation error. I used a run-time expression to create items[0].itemName. In this case the form:text tag is just ignored and is left in the html generated just as is... It seems the only way to use an indexed/nested property name is to use the tag itself. I am using the struts 12/15 build Thanks, -Chandan -Original Message-From: Ted Husted <[EMAIL PROTECTED]>To: Struts List <[EMAIL PROTECTED]>Date: Tuesday, December 26, 2000 4:32 PMSubject: Re: Help: and form input fields If I understand the situation, you might be able to do this with an array of orderItem beans (orderItems), with getName and getValue methods. form:text should then call getName and getValue for the name and value of each text field. getName might use and internal counter to give the text fields different names. *** REPLY SEPARATOR ***On 12/26/2000 at 3:50 PM Chandan Kulkarni wrote: I am trying to use to iterate through a list of order items.I cannot get it to work. I have seen several emails about patches for handling nested and indexed properties... OrderForm consists of an ArrayList of items. I have added indexed getters ArrayList getItems() and OrderItem getItems(int index) I can't see how an indexed setter would help for setting the properties of OrderItems. Here are parts of my orderform.jsp== Order Number : ...<% int count=0; %> value="<%= ((OrderItem)orderlist).getItemNumber() %>" /> <% count++; %> == Unfortunately this generates input tags with identical names for each iteration. This is a problem when you try to set the properties in the items.The value= part of the tag is a hack to get the values from the Bean. Since the name generated needs to be unique I replaced the form:text lines with input tags like this: " value="<%= ((Orde
Re: Help: and form input fields
Actually OrderItem is an object with several fields. I trimmed it down to just one field to simplify the problem. So "items" is an ArrayList of OrderItems. I couldn't find the right combination of nested/indexed property names for the form:text tag to generate the correct input tag. Here's what I tried... " value="<%= ((OrderItem)orderlist).getItemNumber() %>" /> When it can't find the correct property name in the bean it gives a compilation error. I used a run-time expression to create items[0].itemName. In this case the form:text tag is just ignored and is left in the html generated just as is... It seems the only way to use an indexed/nested property name is to use the tag itself. I am using the struts 12/15 build Thanks, -Chandan -Original Message-From: Ted Husted <[EMAIL PROTECTED]>To: Struts List <[EMAIL PROTECTED]>Date: Tuesday, December 26, 2000 4:32 PMSubject: Re: Help: and form input fields If I understand the situation, you might be able to do this with an array of orderItem beans (orderItems), with getName and getValue methods. form:text should then call getName and getValue for the name and value of each text field. getName might use and internal counter to give the text fields different names. *** REPLY SEPARATOR ***On 12/26/2000 at 3:50 PM Chandan Kulkarni wrote: I am trying to use to iterate through a list of order items.I cannot get it to work. I have seen several emails about patches for handling nested and indexed properties... OrderForm consists of an ArrayList of items. I have added indexed getters ArrayList getItems() and OrderItem getItems(int index) I can't see how an indexed setter would help for setting the properties of OrderItems. Here are parts of my orderform.jsp== Order Number : ...<% int count=0; %> value="<%= ((OrderItem)orderlist).getItemNumber() %>" /> <% count++; %> == Unfortunately this generates input tags with identical names for each iteration. This is a problem when you try to set the properties in the items.The value= part of the tag is a hack to get the values from the Bean. Since the name generated needs to be unique I replaced the form:text lines with input tags like this: " value="<%= ((OrderItem)orderlist).getItemName() %>" /> the run-time expression used above cannot be used in the form:text property value, so you have to use the input tag. This still does not allow for setting the values in the OrderItem... Also what do you think of the name used above...should it be items[0].itemName (more semantically correct - I think) or should it be items.itemName[0]... I have tried both but that doesn't work... Does anyone have any pointers/suggestions to get this to work...? Thanks in advance -Chandan
Help: and form input fields
I am trying to use to iterate through a list of order items.I cannot get it to work. I have seen several emails about patches for handling nested and indexed properties... OrderForm consists of an ArrayList of items. I have added indexed getters ArrayList getItems() and OrderItem getItems(int index) I can't see how an indexed setter would help for setting the properties of OrderItems. Here are parts of my orderform.jsp== Order Number : ...<% int count=0; %> value="<%= ((OrderItem)orderlist).getItemNumber() %>" /> <% count++; %> == Unfortunately this generates input tags with identical names for each iteration. This is a problem when you try to set the properties in the items.The value= part of the tag is a hack to get the values from the Bean. Since the name generated needs to be unique I replaced the form:text lines with input tags like this: " value="<%= ((OrderItem)orderlist).getItemName() %>" /> the run-time expression used above cannot be used in the form:text property value, so you have to use the input tag. This still does not allow for setting the values in the OrderItem... Also what do you think of the name used above...should it be items[0].itemName (more semantically correct - I think) or should it be items.itemName[0]... I have tried both but that doesn't work... Does anyone have any pointers/suggestions to get this to work...? Thanks in advance -Chandan
