Support for GenericDTO

["romanisitua@yahoo.com" <ro...@yahoo.com>]

Hi everyone,
From previous royale (flex) docs. I can see that it is possible to bind ui forms to action script objects (DTO's). i.e actionscirpt classes with public getter and setter methods.
The ORM we are using accepts and returns data as custom generic data transfer objects (GenericDTO). This generic dto is implemented as a hashMap of pojo's (by pojo I mean a java class with public getter and setter methods))
See the example java code snippet below:


public class GenericDTO implements Serializable {
    private static final long serialVersionUID = 1L;
    private Map<String, Attribute> attributes = null;
    private String name = null;
    public GenericDTO(String name) {
        notNull(name, "The name of the DTO cannot be null...");
        this.attributes = new HashMap<String, Attribute>();
        this.name = name;
    }
    public GenericDTO add(String name, Attribute attribute) {
        notNull(name, "Attribute name cannot be null");
        notNull(attribute, "Attribute with name: " + name + " is null!");
        this.attributes.put(name, attribute);
        return this;
    }
........
   // there are getter/setter method to return the HashMap of Attributes and name field.   
   The attribute class is the base class of all data types. So we have StringType (for String), IntegerType (for Integer) that extend Attribute. Class Attribute
public Object getInputValue();
public void setInputValue(final Object object);    
Is it possible to bind the generic dto to royale ui controls ? e.g. for example I was able to bind an arrayList of ContactDTO successfully. This contactDTO had name and email as fields with public getter and setter methods as follows
 <j:DataGrid localId="dg1" dataProvider="{contacts}">            <j:columns>                                <j:DataGridColumn label="Name" dataField="name" columnWidth="200"/>                <j:DataGridColumn label="Email" dataField="email" columnWidth="200"/>                     </j:columns>        </j:DataGrid>   

Assuming it is possible to create ActionScript (as3) versions of GenericDTO, Attribute (with subclasses StringType, IntegerType e.t.c). Implementing the appropriate get and set functions.
Is it possible to bind an arrayList of GenericDTO to a royale data grid as follows ?
 <j:DataGrid localId="dg1" dataProvider="{records}">            <j:columns>                               <j:DataGridColumn label="Name" dataField="{attributes.name.inputValue}" columnWidth="200"/>                <j:DataGridColumn label="Email" dataField="{attributes.email.inputValue}" columnWidth="200"/>                     </j:columns>        </j:DataGrid>   

i.e. use databinding expressions in the dataField of the data grid ?
How about other royale UI controls ? e.g textFields and numberFields in a UI form.

Regards,
Roman,

RE: [EXTERNAL] Support for GenericDTO

[Brian Raymes <br...@teotech.com>]

To understand your problem a bit better, are you saying you’ll have the following?

ArrayList full of GenericDTO, each with a map of attributes? Binding the ArrayList of GenericDTO to the dataProvider will then use a single instance of GenericDTO for each row.

It almost seems as if you want rows for attributes, not for each GenericDTO?

You may have to build a new list that contains all attributes you want to render, or look into building/porting the AdvancedDataGrid from Flex. That allows sub-rows (folders) for situations like this.

As for dataFields in Royale, you have a couple of options. You generally set dataField to a relative path within the row’s data instance. For example,  dataField="someValue" or dataField="someObject.someOtherObject.someValue" in more complex object scenarios.

As you can see, binding isn’t used for dataField.

You can also use a custom itemRender to build whatever sub-component you want for each cell. For example, I have Lists/DataContainer where each row can be another List/DataContainer, etc.

As for all other controls, yes, you can bind directly to their text/value fields.

FYI, maps, in my experience, or at least with the tools I’m using, turn into AS3 generic Objects. I’m coming from a Flex source base, being ported to Royale. Maps now exist, and may be usable with deserialization.

From: romanisitua@yahoo.com <ro...@yahoo.com>
Sent: Tuesday, June 15, 2021 1:20 PM
To: users@royale.apache.org
Subject: [EXTERNAL] Support for GenericDTO


Hi everyone,

From previous royale (flex) docs. I can see that it is possible to bind ui forms to action script objects (DTO's). i.e actionscirpt classes with public getter and setter methods.

The ORM we are using accepts and returns data as custom generic data transfer objects (GenericDTO). This generic dto is implemented as a hashMap of pojo's (by pojo I mean a java class with public getter and setter methods))

See the example java code snippet below:



public class GenericDTO implements Serializable {

    private static final long serialVersionUID = 1L;

    private Map<String, Attribute> attributes = null;

    private String name = null;

    public GenericDTO(String name) {

        notNull(name, "The name of the DTO cannot be null...");

        this.attributes = new HashMap<String, Attribute>();

        this.name = name;

    }

    public GenericDTO add(String name, Attribute attribute) {

        notNull(name, "Attribute name cannot be null");

        notNull(attribute, "Attribute with name: " + name + " is null!");

        this.attributes.put(name, attribute);

        return this;

    }

........

   // there are getter/setter method to return the HashMap of Attributes and name field.


   The attribute class is the base class of all data types. So we have StringType (for String), IntegerType (for Integer) that extend Attribute.

Class Attribute

public Object getInputValue();

public void setInputValue(final Object object);


Is it possible to bind the generic dto to royale ui controls ? e.g. for example I was able to bind an arrayList of ContactDTO successfully. This contactDTO had name and email as fields with public getter and setter methods as follows

 <j:DataGrid localId="dg1" dataProvider="{contacts}">
            <j:columns>
                 <j:DataGridColumn label="Name" dataField="name" columnWidth="200"/>
                <j:DataGridColumn label="Email" dataField="email" columnWidth="200"/>
            </j:columns>
        </j:DataGrid>


Assuming it is possible to create ActionScript (as3) versions of GenericDTO, Attribute (with subclasses StringType, IntegerType e.t.c). Implementing the appropriate get and set functions.

Is it possible to bind an arrayList of GenericDTO to a royale data grid as follows ?

 <j:DataGrid localId="dg1" dataProvider="{records}">
            <j:columns>
                <j:DataGridColumn label="Name" dataField="{attributes.name.inputValue}" columnWidth="200"/>
                <j:DataGridColumn label="Email" dataField="{attributes.email.inputValue}" columnWidth="200"/>
            </j:columns>
        </j:DataGrid>


i.e. use databinding expressions in the dataField of the data grid ?

How about other royale UI controls ? e.g textFields and numberFields in a UI form.


Regards,

Roman,