simple-support — General user and support issues

[Simple-support] Framework limitation? Session map, template system and the "class" attribute of elements.

[Timo R. <cr...@ol...>]

Hello,

I have a question regarding the persister callback session map and the 
template system (appropriate documentation section is "Maintaining 
state between persister callbacks").

I have a XML file, which looks like this:

-------------
<MyObjects>
  <MyInterface class="net.test.lib.concurrent.theme.InterfaceImpl1"/>
  <MyInterface class="net.test.lib.concurrent.theme.InterfaceImpl2"/>
  <MyInterface class="net.test.lib.concurrent.theme.InterfaceImpl3"/>
</MyObjects>
-------------

The XML above is of course only a simplification of the real 
structure. There are a lot of entries for "<MyInterface...", and every 
entry has the same packge but a different class (it is always 
"net.test.lib.concurrent.theme.").

Now it would be really nice to replace those package declarations with 
a template variable, so the XML looks like this:

-------------
<MyObjects>
  <property name="package" value="net.test.lib.concurrent.theme"/>
  
  <MyInterface class="${package}.InterfaceImpl1"/>
  <MyInterface class="${package}.InterfaceImpl2"/>
  <MyInterface class="${package}.InterfaceImpl3"/>
</MyObjects>
-------------

That way I could easily change the package name and must not touch 
every "<MyInterface..." line. In the documentation you write "The 
templating engine has access to all details placed into the session 
map object.", but this seems only to be true for other "normal" 
elements, not the "class" attribute of an element.

Is this a real limitation, or even a bug?

(The framework just does not substitute ${package}, so it tries to 
load the class "${package}.InterfaceImpl1" instead of 
"net.test.lib.concurrent.theme.InterfaceImpl1").

I'm using the XML file to configure a rather complex system (like a 
build system) and this feature would be extremely useful in many 
cases for me (and for others, too, for sure).

If this is a limitation, may you think about implementing this feature 
so the template system also works for those "class" attributes in the 
XML elements? That would be great!


Best regards,
Timo

Re: [Simple-support] Question regarding maps

[Niall G. <gal...@ya...>]

Hi,

Thanks for the feedback, glad you like the framework.
Yes, the construct you mentioned can be done with an
org.simpleframework.xml.util.Dictionary also, although
this is a List that has a "get" method to retrieve
objects by key.

Regards,
Niall

--- Timo Rumland <cr...@ol...> wrote:

> Hello,
> 
> > Hello,
> > I have a question regarding the serialization of
> maps. Let's assume
> > we have the following two Classes:
> > ..
> 
> I think I found a solution for that. I now use a
> persister callback
> (@Commit, @Persist and @Complete) to transform my
> map data into a
> normal ArrayList and back for the serialization
> process. That way, I
> can achieve the XML structure I wanted to.
> 
> This XML framework is amazing, it is definitely in
> my top 5 of Java
> frameworks of all times :)
> 
> 
> Best regards,
> Timo
> 
> 
>
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Re: [Simple-support] Question regarding maps

[Timo R. <cr...@ol...>]

Hello,

> Hello,
> I have a question regarding the serialization of maps. Let's assume
> we have the following two Classes:
> ..

I think I found a solution for that. I now use a persister callback
(@Commit, @Persist and @Complete) to transform my map data into a
normal ArrayList and back for the serialization process. That way, I
can achieve the XML structure I wanted to.

This XML framework is amazing, it is definitely in my top 5 of Java
frameworks of all times :)


Best regards,
Timo

[Simple-support] Question regarding maps

[Timo R. <cr...@ol...>]

Hello,

I have a question regarding the serialization of maps. Let's assume we
have the following two Classes:

--------------
  @Root( name = "UIDefinition" )
  public class UIAdapterModel {
      @ElementMap(entry="UserInterface", key="key", attribute=true, inline=true )
      public HashMap<String, UserInterface> userInterfaces = new HashMap<String, UserInterface>();
  }

  @Root
  public class UserInterface {
      @Element
      public String identifier = null;
  }
--------------

My serialization code looks like this:

--------------
  Serializer serializer = new Persister();
  UIAdapterModel model = new UIAdapterModel();
  model.userInterfaces.put("id1", new UserInterface("id1"));

  serializer.write(model, System.out);
--------------

(Note: The constructor of class "UserInterface" sets the "identifier"
member of that instance.)

What I now get the the following XML output:


  <UIDefinition>
     <UserInterface key="id1">
       <userInterface>
          <identifier>id1</identifier>
       </userInterface>
     </UserInterface>
  </UIDefinition>
  

My question is now, why is there the "<userInterface>" tag? What I 
wanted to have is just:


  <UIDefinition>
     <UserInterface key="id1">
          <identifier>id1</identifier>
     </UserInterface>
  </UIDefinition>


When I look at your example on the tutorial page of Simple XML in the 
"Dealing with map objects" section, the XML output is:

  <properties>
     <property key="one">first value</property>
     <property key="two">second value</property>
  </properties>
  
There is not another tag like in my output. Why is that? Perhaps 
because Strings are handled somewhat different than arbitrary classes? 
Is there a way to get an output without that "<userInterface>" tag?


Thanks a lot for your help!


Best regards,
Timo

Re: [Simple-support] mapping map with nested lists

[Niall G. <gal...@ya...>]

Hi,

Yes it is possible, however you will need more
metadata than the the typed map can provide so the
following will work.


private Map<String, AttributeList> attributeSets;

@Root
private class AttributeSet {
  @ElementList(inline=true)
  private List<String> attribute;
  @Attribute
  private String id;

  public List<String> getList() {
     return attribute;
  } 
   
}

Hope this helps.

Niall

--- Johannens Zillmann <JZ...@10...> wrote:

> Hi there,
> 
> the framework looks great!
> I have following xml
> <attributeSets>
> 	<attributeSet id="set1">
> 		<attribute type="STRING">aString</attribute>
> 		<attribute type="LONG">124</attribute>
> 	</attributeSet>
> 	<attributeSet id="set2">
> 		<attribute type="STRING">a2ndString</attribute>
> 	</attributeSet>
> </attributeSets>
> 
> I wonder if its possible to map this to a single map
> ?
> The mapKey should be the id attribute of
> attributeSet.
> The mapValue should be an List of Attribute objects.
> The signature looks like Map<String,
> List<Attribute>>
> 
> So given this example xml the map would have to
> entries.
> The value of the first entry is a list of 2
> attributes.
> The value of the second is a list of 1 attribute.
> 
> Is that possible ?
> Johannes
> 
> 
> 
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 101tec GmbH
> Halle (Saale), Saxony-Anhalt, Germany
> http://www.101tec.com
> 
> >
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[Simple-support] mapping map with nested lists

[Johannens Z. <JZ...@10...>]

Hi there,

the framework looks great!
I have following xml
<attributeSets>
	<attributeSet id="set1">
		<attribute type="STRING">aString</attribute>
		<attribute type="LONG">124</attribute>
	</attributeSet>
	<attributeSet id="set2">
		<attribute type="STRING">a2ndString</attribute>
	</attributeSet>
</attributeSets>

I wonder if its possible to map this to a single map ?
The mapKey should be the id attribute of attributeSet.
The mapValue should be an List of Attribute objects.
The signature looks like Map<String, List<Attribute>>

So given this example xml the map would have to entries.
The value of the first entry is a list of 2 attributes.
The value of the second is a list of 1 attribute.

Is that possible ?
Johannes



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
101tec GmbH
Halle (Saale), Saxony-Anhalt, Germany
http://www.101tec.com

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Re: [Simple-support] xsd schema generation

[Niall G. <gal...@ya...>]

Hi,

Yes I have been thinking of doing this. It should be
pretty easy to do, however I have not got around to it
yet. I think this will probably be the next big
enhancement to the project.

Niall

--- "Borkholder, Brandon" <bor...@gm...> wrote:

> I discovered Simple XML and I think it's great.  I
> like the concept of 
> source-first much better than JAXB's schema-first. 
> But I was wondering 
> if you've thought of being able to generate an XSD
> schema from the class 
> annotations.  I know I'd find it useful when I need
> to send other people 
> an XML schema for my objects.
> 
> Thanks again for your work.
> 
>
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Re: [Simple-support] How to create Option Text and optional Object.

[Niall G. <gal...@ya...>]

Hi,

You could use this.


@Root(name="ENV")
public class Env {

   @ElementList(name="VIDEO")
   private List<Cam> list;
}

@Root(name="CAM")
public class Cam {
   
   @Attribute(name="ADDR")
   private String addr;

   @Text
   private String text;
}

However the free text "Q" can not be supported as it
needs to be wrapped in an element. Free text and
elements can not be mixed in the schama currently.

Niall

--- John Matthews <jo...@qu...> wrote:

> I have an XML document and I am having troubles
> setting up  my object 
> class to parse into.  Here is what I have:
> <ENV>
> <VIDEO>Q</VIDEO>
> </ENV>
> or it can be
> <ENV>
> <VIDEO>
>     <CAM ADDR="1">TEXT</CAM>
>     <CAM ADDR="2">TEXT</CAM>
> </VIDEO>
> </ENV>
> 
> So how do I setup my one class to handle both
> situations?
> @Root
> public class Env {
>     @Element(required=false)
>     public Video video= new Video();
> 
>     @Root
>     public static class Video {
>         @Element(required=false)
>         public Cam cam;
>     }
>     
>     @Root
>     public static class Cam {
>            @Attribute(required=false)
>            public String addr;    
>            
>            public String text;   
> 
>            @Text(required=false)
>            public String getText() {
>               return text;           
>            }
> 
>            @Text(required=false)
>            public void setText(String text){
>               this.text = text;           
>            }
>     }
> }
> 
>
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Re: [Simple-support] how to have a link to the parent

[Niall G. <gal...@ya...>]

Hi,

I am not sure what you mean by access. If your talking
about an object reference access, then thats simple.
Do the following.


class Parent {

public void commit(Map session){
  session.put("parent", this);
}
}

class Child {

public void commit(Map session) {
 Parent p = (Parent)session.get("parent");
// ... do whatever
}
}

Hope this helps.
Niall

--- Benoît Pointet <ben...@un...> wrote:

> Hi there!
> 
> first of all thanks ... it's so simple! so simple
> that when I hit  
> something, I can't help myself from thinking I've
> misread the doc. But  
> after having read it twice, I still have this
> problem :
> 
> I'm working on a simulation toolkit, companion of a
> multi-agent  
> communication system.
> the toolkit involves configuring complex scenarios
> with xml.
> 
> the structure of those config XML files looks like :
> 
> simulation
> . platform
> . . agent
> . . . argument
> . . agent
> . . agent
> . population
> . . actor
> . . . profile
> . . . agent
> . . . . type
> . . . . classname
> . . . agent
> . scenario
> . . phase
> . . . agent
> . . . action
> . . phase
> 
> ...you get the picture
> 
> I successfully can deserialize this structure into a
> structure of  
> corresponding objects, and the id-ref mechanism
> works like a charm.
> 
> But I surely would need that AN OBJECT MAY ACCESS
> ITS PARENT in this  
> object hierarchy.
> 
> I naively though there'd be a @Parent annotation one
> may apply to a  
> field (of type Object) to automatize linking to
> parent, but this don't  
> exist.
> 
> I could I generalize this linking to the parent
> object at  
> deserialization time ?
> 
> thanks,
> b.
> 
>
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[Simple-support] how to have a link to the parent

[Benoît P. <ben...@un...>]

Hi there!

first of all thanks ... it's so simple! so simple that when I hit  
something, I can't help myself from thinking I've misread the doc. But  
after having read it twice, I still have this problem :

I'm working on a simulation toolkit, companion of a multi-agent  
communication system.
the toolkit involves configuring complex scenarios with xml.

the structure of those config XML files looks like :

simulation
. platform
. . agent
. . . argument
. . agent
. . agent
. population
. . actor
. . . profile
. . . agent
. . . . type
. . . . classname
. . . agent
. scenario
. . phase
. . . agent
. . . action
. . phase

...you get the picture

I successfully can deserialize this structure into a structure of  
corresponding objects, and the id-ref mechanism works like a charm.

But I surely would need that AN OBJECT MAY ACCESS ITS PARENT in this  
object hierarchy.

I naively though there'd be a @Parent annotation one may apply to a  
field (of type Object) to automatize linking to parent, but this don't  
exist.

I could I generalize this linking to the parent object at  
deserialization time ?

thanks,
b.

Re: [Simple-support] Strategy implementation

[Niall G. <gal...@ya...>]

Hi Yaniv,

This is exactly what the Strategy is intended to do.
As well as implementing your own, you can use a
filter/decorator pattern. Where you implement a
strategy that transforms the result of the
Defaultstrategy. Here you could simply modify the
NodeMap before invoking the DefaultStragegy.setRoot
and DefaultStrategy.setElement and modify it back to
the expected form before invoking
DefaultStrategy.getRoot and Defaultstrategy.getRoot.
Either that or you could just create your own strategy
based on the DefaultStratgy and modify it to do what
you need. 

I am intending on making it easier to do this type of
thing in furture releases.

Niall


--- Yaniv Kunda <Ku...@Te...> wrote:

> I wanted to implement a strategy that, similarly to
> the DefaultStrategy
> class, determines the class of the parsed element
> from the optional
> "class" attribute.
> The difference is that I want to derive the class
> off a different
> attribute, using some arbitrary logic.
> For example, instead of the following XML:
> <tasks>
>     <task class="com.tasks.FirstTask">
>         <init>true</init>
>     </task>
>     <task class="com.tasks.SecondTask">
>         <start>true</start>
>     </task>
> </tasks>
> 
> I would like to have this XML:
> <tasks>
>     <task type=1>
>         <init>true</init>
>     </task>
>     <task type=2>
>         <start>true</start>
>     </task>
> </tasks>
> Plus some code responsible for the logic.
> 
> If the getClass(String) method in DefaultStrategy
> was protected and not
> private, this could be done via a simple extended
> class containing a
> single method override.
> 
> Does this sounds like a good idea, or is there a
> simpler way to do it?
> 
> Regards,
> Yaniv Kunda
> 
> 
>
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[Simple-support] Strategy implementation

[Yaniv K. <Ku...@Te...>]

I wanted to implement a strategy that, similarly to the DefaultStrategy
class, determines the class of the parsed element from the optional
"class" attribute.
The difference is that I want to derive the class off a different
attribute, using some arbitrary logic.
For example, instead of the following XML:
<tasks>
    <task class="com.tasks.FirstTask">
        <init>true</init>
    </task>
    <task class="com.tasks.SecondTask">
        <start>true</start>
    </task>
</tasks>

I would like to have this XML:
<tasks>
    <task type=1>
        <init>true</init>
    </task>
    <task type=2>
        <start>true</start>
    </task>
</tasks>
Plus some code responsible for the logic.

If the getClass(String) method in DefaultStrategy was protected and not
private, this could be done via a simple extended class containing a
single method override.

Does this sounds like a good idea, or is there a simpler way to do it?

Regards,
Yaniv Kunda

Re: [Simple-support] Serializing/ deserializing Maps with null values

[Stanislaw O. <sta...@ca...>]

>
> I have released 1.7.2 which has support for null keys
> and values for Maps.


Cool -- I'll upgrade to 1.7.2 right away then. Once again thanks for the
great piece of software!

Cheers,

Staszek

Re: [Simple-support] Serializing/ deserializing Maps with null values

[Niall G. <gal...@ya...>]

Hi,

I have released 1.7.2 which has support for null keys
and values for Maps.

Niall

--- Niall Gallagher <gal...@ya...> wrote:

> Hi, 
> 
> This seems like a bug, there is an if statement in
> the
> Map converters that checks for null values, ill
> modify
> this and add it to the next release.
> 
> In general, if you can serialize and not deserialize
> then there is a bug somewhere. Every serialization
> should be fully capable of deserialization.
> 
> Niall
> 
> --- Stanislaw Osinski
> <sta...@ca...>
> wrote:
> 
> > Hi once more,
> > 
> > Does the framework currently support serializing/
> > deserializing maps with
> > null values (see code below)? The serializer seems
> > to output an empty node
> > for such entries (with no key), which causes the
> > deserializer to fail.
> > Obviously, I can hack this around quite easily,
> but
> > I was wondering if this
> > is the intended behaviour?
> > 
> > @Root
> > public class SimpleTest
> > {
> >     @ElementMap
> >     private Map<String, String> test = new
> > HashMap<String, String>();
> > 
> >     public static void main(String [] args) throws
> > Exception
> >     {
> >         SimpleTest test = new SimpleTest();
> >         test.test.put("test", null);
> > 
> >         Persister persister = new Persister();
> >         persister.write(test, System.out);
> >     }
> > }
> > 
> > Cheers,
> > 
> > Staszek
> > >
>
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> > 
> 
> 
> 
>      
>
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> 
> 
>
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Re: [Simple-support] help with deserializing XML to ElementMap

[Niall G. <gal...@ya...>]

Hi Micah,

I've tested this, everything works as expected.
However you have no need for the Field class. If you
specify a map key as an attribute=true then its
inlined in to the created wrapper element entry=true.
So if you use the following:

      @ElementMap(name="fields", entry="field",
key="id", attribute=true)
      private HashMap<String, Lucene> fields = new
HashMap<String, Lucene>();

Then everything works fine. BTW, if you use generics
you don't need to declare keyType or valueType in the
annotation.

Niall


--- Micah Jaffe <mi...@af...> wrote:

> I'm trying to convert some existing XML parsing code
> to use Simple  
> XML and am almost there, but I'm running into an
> issue trying to use  
> ElementMap.
> 
> Here's the XML (abbreviated):
> 
> <?xml version="1.0" encoding="ISO-8859-1"?>
> <index id="users">
>      <database>xyz</database>
>      <query>
>          <columns>foo,bar</columns>
>          <tables>a,b,c</tables>
>      </query>
>      <fields>
>          <field id="foo">
>              <lucene>
>                  <index>TOKENIZED</index>
>                  <store>false</store>
>                  <default>true</default>
>              </lucene>
>          </field>
>          <field id="bar">
>              <lucene>
>                  <index>TOKENIZED</index>
>                  <store>false</store>
>                  <default>true</default>
>              </lucene>
>          </field>
>      </fields>
> </index>
> 
> Here are my classes:
> 
> @Root(name="index")
> public class IndexConfig {
> 
>      @Attribute
>      private String id;
> 
>      @Element
>      private String database;
> 
>      @Element
>      private Query query;
> 
>      @ElementMap(name="fields", entry="field",
> key="id",  
> attribute=true, keyType=String.class,
> valueType=Field.class)
>      private HashMap<String, Field> fields = new
> HashMap<String,  
> Field>();
> }
> 
> @Root
> public class Field {
> 
>      @Attribute
>      private String id;
> 
>      @Element
>      private Lucene lucene;
> }
> 
> [Not including Query or Lucene classes here as
> they're not at issue]
> 
> The parsing chokes here:
> 
> org.simpleframework.xml.load.ValueRequiredException:
> Unable to  
> satisfy @org.simpleframework.xml.Attribute(name=,
> empty=,  
> required=true) on field 'id' for class  
> com.affinitycircles.core.xml.Field at line 16
>          at
> org.simpleframework.xml.load.Composite.validate 
> (Composite.java:389)
>          at
>
org.simpleframework.xml.load.Composite.readAttributes
> 
> (Composite.java:221)
>          at
> org.simpleframework.xml.load.Composite.read 
> (Composite.java:193)
> [... the rest deleted ...]
> 
> For some reason it can't seem to find the id
> attribute for Field.  If  
> I make the id attribute optional, then it seems the
> parser gets  
> confused and is looking for elements in the Lucene
> block.  If I  
> change ElementMap to instead be an ElementList, the
> file will parse.   
> I've tried not using @Root with Field and that
> doesn't affect the  
> outcome (I'm really not sure what @Root is for...).
> 
> Any help?
> 
> -Micah
> 
>
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[Simple-support] xsd schema generation

[Borkholder, B. <bor...@gm...>]

I discovered Simple XML and I think it's great.  I like the concept of 
source-first much better than JAXB's schema-first.  But I was wondering 
if you've thought of being able to generate an XSD schema from the class 
annotations.  I know I'd find it useful when I need to send other people 
an XML schema for my objects.

Thanks again for your work.

Re: [Simple-support] help with deserializing XML to ElementMap

[Micah J. <mi...@af...>]

Hi,

Thanks for the response, but as you can see in the XML, the  
particular attribute it's complaining about (attribute "id" in  
element "field") is in fact there.  Any other thoughts?

-Micah

On Feb 25, 2008, at 2:01 PM, Niall Gallagher wrote:

> Hi,
>
> Required means it can not be null, if it is not
> required and null it won't appear. So you must provide
> a value for required attributes.
>
> Niall
>
>
> --- Micah Jaffe <mi...@af...> wrote:
>
>> I'm trying to convert some existing XML parsing code
>> to use Simple
>> XML and am almost there, but I'm running into an
>> issue trying to use
>> ElementMap.
>>
>> Here's the XML (abbreviated):
>>
>> <?xml version="1.0" encoding="ISO-8859-1"?>
>> <index id="users">
>>      <database>xyz</database>
>>      <query>
>>          <columns>foo,bar</columns>
>>          <tables>a,b,c</tables>
>>      </query>
>>      <fields>
>>          <field id="foo">
>>              <lucene>
>>                  <index>TOKENIZED</index>
>>                  <store>false</store>
>>                  <default>true</default>
>>              </lucene>
>>          </field>
>>          <field id="bar">
>>              <lucene>
>>                  <index>TOKENIZED</index>
>>                  <store>false</store>
>>                  <default>true</default>
>>              </lucene>
>>          </field>
>>      </fields>
>> </index>
>>
>> Here are my classes:
>>
>> @Root(name="index")
>> public class IndexConfig {
>>
>>      @Attribute
>>      private String id;
>>
>>      @Element
>>      private String database;
>>
>>      @Element
>>      private Query query;
>>
>>      @ElementMap(name="fields", entry="field",
>> key="id",
>> attribute=true, keyType=String.class,
>> valueType=Field.class)
>>      private HashMap<String, Field> fields = new
>> HashMap<String,
>> Field>();
>> }
>>
>> @Root
>> public class Field {
>>
>>      @Attribute
>>      private String id;
>>
>>      @Element
>>      private Lucene lucene;
>> }
>>
>> [Not including Query or Lucene classes here as
>> they're not at issue]
>>
>> The parsing chokes here:
>>
>> org.simpleframework.xml.load.ValueRequiredException:
>> Unable to
>> satisfy @org.simpleframework.xml.Attribute(name=,
>> empty=,
>> required=true) on field 'id' for class
>> com.affinitycircles.core.xml.Field at line 16
>>          at
>> org.simpleframework.xml.load.Composite.validate
>> (Composite.java:389)
>>          at
>>
> org.simpleframework.xml.load.Composite.readAttributes
>>
>> (Composite.java:221)
>>          at
>> org.simpleframework.xml.load.Composite.read
>> (Composite.java:193)
>> [... the rest deleted ...]
>>
>> For some reason it can't seem to find the id
>> attribute for Field.  If
>> I make the id attribute optional, then it seems the
>> parser gets
>> confused and is looking for elements in the Lucene
>> block.  If I
>> change ElementMap to instead be an ElementList, the
>> file will parse.
>> I've tried not using @Root with Field and that
>> doesn't affect the
>> outcome (I'm really not sure what @Root is for...).
>>
>> Any help?
>>
>> -Micah
>>
>>
> ---------------------------------------------------------------------- 
> ---
>> This SF.net email is sponsored by: Microsoft
>> Defy all challenges. Microsoft(R) Visual Studio
>> 2008.
>>
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>>
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>>
>
>
>
>        
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Re: [Simple-support] help with deserializing XML to ElementMap

[Niall G. <gal...@ya...>]

Hi,

Required means it can not be null, if it is not
required and null it won't appear. So you must provide
a value for required attributes.

Niall

--- Micah Jaffe <mi...@af...> wrote:

> I'm trying to convert some existing XML parsing code
> to use Simple  
> XML and am almost there, but I'm running into an
> issue trying to use  
> ElementMap.
> 
> Here's the XML (abbreviated):
> 
> <?xml version="1.0" encoding="ISO-8859-1"?>
> <index id="users">
>      <database>xyz</database>
>      <query>
>          <columns>foo,bar</columns>
>          <tables>a,b,c</tables>
>      </query>
>      <fields>
>          <field id="foo">
>              <lucene>
>                  <index>TOKENIZED</index>
>                  <store>false</store>
>                  <default>true</default>
>              </lucene>
>          </field>
>          <field id="bar">
>              <lucene>
>                  <index>TOKENIZED</index>
>                  <store>false</store>
>                  <default>true</default>
>              </lucene>
>          </field>
>      </fields>
> </index>
> 
> Here are my classes:
> 
> @Root(name="index")
> public class IndexConfig {
> 
>      @Attribute
>      private String id;
> 
>      @Element
>      private String database;
> 
>      @Element
>      private Query query;
> 
>      @ElementMap(name="fields", entry="field",
> key="id",  
> attribute=true, keyType=String.class,
> valueType=Field.class)
>      private HashMap<String, Field> fields = new
> HashMap<String,  
> Field>();
> }
> 
> @Root
> public class Field {
> 
>      @Attribute
>      private String id;
> 
>      @Element
>      private Lucene lucene;
> }
> 
> [Not including Query or Lucene classes here as
> they're not at issue]
> 
> The parsing chokes here:
> 
> org.simpleframework.xml.load.ValueRequiredException:
> Unable to  
> satisfy @org.simpleframework.xml.Attribute(name=,
> empty=,  
> required=true) on field 'id' for class  
> com.affinitycircles.core.xml.Field at line 16
>          at
> org.simpleframework.xml.load.Composite.validate 
> (Composite.java:389)
>          at
>
org.simpleframework.xml.load.Composite.readAttributes
> 
> (Composite.java:221)
>          at
> org.simpleframework.xml.load.Composite.read 
> (Composite.java:193)
> [... the rest deleted ...]
> 
> For some reason it can't seem to find the id
> attribute for Field.  If  
> I make the id attribute optional, then it seems the
> parser gets  
> confused and is looking for elements in the Lucene
> block.  If I  
> change ElementMap to instead be an ElementList, the
> file will parse.   
> I've tried not using @Root with Field and that
> doesn't affect the  
> outcome (I'm really not sure what @Root is for...).
> 
> Any help?
> 
> -Micah
> 
>
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> 2008.
>
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> Sim...@li...
>
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[Simple-support] help with deserializing XML to ElementMap

[Micah J. <mi...@af...>]

I'm trying to convert some existing XML parsing code to use Simple  
XML and am almost there, but I'm running into an issue trying to use  
ElementMap.

Here's the XML (abbreviated):

<?xml version="1.0" encoding="ISO-8859-1"?>
<index id="users">
     <database>xyz</database>
     <query>
         <columns>foo,bar</columns>
         <tables>a,b,c</tables>
     </query>
     <fields>
         <field id="foo">
             <lucene>
                 <index>TOKENIZED</index>
                 <store>false</store>
                 <default>true</default>
             </lucene>
         </field>
         <field id="bar">
             <lucene>
                 <index>TOKENIZED</index>
                 <store>false</store>
                 <default>true</default>
             </lucene>
         </field>
     </fields>
</index>

Here are my classes:

@Root(name="index")
public class IndexConfig {

     @Attribute
     private String id;

     @Element
     private String database;

     @Element
     private Query query;

     @ElementMap(name="fields", entry="field", key="id",  
attribute=true, keyType=String.class, valueType=Field.class)
     private HashMap<String, Field> fields = new HashMap<String,  
Field>();
}

@Root
public class Field {

     @Attribute
     private String id;

     @Element
     private Lucene lucene;
}

[Not including Query or Lucene classes here as they're not at issue]

The parsing chokes here:

org.simpleframework.xml.load.ValueRequiredException: Unable to  
satisfy @org.simpleframework.xml.Attribute(name=, empty=,  
required=true) on field 'id' for class  
com.affinitycircles.core.xml.Field at line 16
         at org.simpleframework.xml.load.Composite.validate 
(Composite.java:389)
         at org.simpleframework.xml.load.Composite.readAttributes 
(Composite.java:221)
         at org.simpleframework.xml.load.Composite.read 
(Composite.java:193)
[... the rest deleted ...]

For some reason it can't seem to find the id attribute for Field.  If  
I make the id attribute optional, then it seems the parser gets  
confused and is looking for elements in the Lucene block.  If I  
change ElementMap to instead be an ElementList, the file will parse.   
I've tried not using @Root with Field and that doesn't affect the  
outcome (I'm really not sure what @Root is for...).

Any help?

-Micah

[Simple-support] How to create Option Text and optional Object.

[John M. <jo...@qu...>]

I have an XML document and I am having troubles setting up  my object 
class to parse into.  Here is what I have:
<ENV>
<VIDEO>Q</VIDEO>
</ENV>
or it can be
<ENV>
<VIDEO>
    <CAM ADDR="1">TEXT</CAM>
    <CAM ADDR="2">TEXT</CAM>
</VIDEO>
</ENV>

So how do I setup my one class to handle both situations?
@Root
public class Env {
    @Element(required=false)
    public Video video= new Video();

    @Root
    public static class Video {
        @Element(required=false)
        public Cam cam;
    }
    
    @Root
    public static class Cam {
           @Attribute(required=false)
           public String addr;    
           
           public String text;   

           @Text(required=false)
           public String getText() {
              return text;           
           }

           @Text(required=false)
           public void setText(String text){
              this.text = text;           
           }
    }
}

Re: [Simple-support] Limiting CycleStrategy to affect only objects of a certain type

[Stanislaw O. <sta...@ca...>]

> Yes you can, I use a filter like pattern to do this.
> For example if you wrote the following.
>
> public class AttributeModifier implements Strategy {
>
>   private Strategy strategy;
>
>   public AttributeModifier(Strategy strategy) {
>      this.strategy = strategy;
>   }
>
>   // remainder here...
>
>   public boolean setElement(Class field, Object
> value, NodeMap node, Map map) throws Exception;
>      boolean result = strategy.setElement(field,
> value, node, map);
>      Node node = node.remove("id");
>
>      if(MyClass.class.isInstance(value)) {
>         node.put(node.getValue());
>      }
>      return result;
>   }
> }
>

That does the trick, thanks!

Staszek

Re: [Simple-support] reference a field of an instance variable

[Niall G. <gal...@ya...>]

Hi,

Glad this helped.

Niall

--- Quirino Zagarese <qu...@la...> wrote:

> This seems definitely better!
> I focused too much on attributes and forgot methods.
> I gave a deeper look to the code and I found this
> framework is
> much more complete than it seems at first sight.
> I would like to use it as serialization engine for
> an open
> framework I'm working on.
> Really a great job!
> 
> 2008/2/11, Niall Gallagher
> <gal...@ya...>:
> >
> > Hi,
> >
> > What you have suggested is static, by this I mean
> that
> > it is a static value on an annotation. So why not
> use
> > getter and setter methods to serialize your
> values.
> > For example instead of annotating the field why
> not
> > annotate a method.
> >
> > public class Class1{
> >
> >    @Element
> >    private Class3 class3;
> >
> >    @Attribute
> >    private long id;
> > }
> >
> > public class Class2{
> >
> >    @Attribute(name="class1", references=Class1.id)
> >    private Class1 class1;
> >
> >    @Attribute
> >    public long getId() {
> >       return class1.id;
> >    }
> >
> >    @Attribute
> >    public void setId(long id) {
> >       class1 = new Class1();
> >       class1.id = id;
> >    }
> > }
> >
> > This will read and write the elements you want
> from
> > Class1.
> >
> > Niall
> >
> > --- Quirino Zagarese <qu...@la...>
> wrote:
> >
> > > Hi and thank you  very much for the fast
> response!
> > > The @Replace solution works perfectly; anyway I
> > > wondered if a construct like
> > > the one I proposed
> > > could be useful for serialization purpose only.
> > > I think so cause you don't need any callbacks
> and
> > > each class "decides" how
> > > to be serialized.
> > > If you think such a functionality to be
> interesting,
> > > I'd like to contribute
> > > it.
> > > Thank you again
> > > Regards
> > >
> > > 2008/2/8, Niall Gallagher
> > > <gal...@ya...>:
> > > >
> > > > Hi,
> > > >
> > > > Yes you can, but not as an attribute of the
> > > containing
> > > > class. All you need to do is use the @Replace
> > > > annotation on a method. For instance if you
> wish
> > > to
> > > > write a single value you should do the
> following.
> > > >
> > > > private Class1 {
> > > >
> > > >    @Element(required=false)
> > > >    private Blah other;
> > > >
> > > >    @Attrobite
> > > >    private int id;
> > > >
> > > >    @Replace
> > > >    private Class1 replace() {
> > > >      if(isSomeCondition()) {
> > > >          Class1 class1 = new Class1();
> > > >          class1.id = id;
> > > >          return class1;
> > > >       }
> > > >       return this;
> > > >    }
> > > > }
> > > >
> > > > public Class2 {
> > > >
> > > >   @Element
> > > >   private Class1 value;
> > > > }
> > > >
> > > > This will cause a callback to Class1 before
> its
> > > > written to XML.
> > > >
> > > > Niall
> > > >
> > > >
> > > > --- Quirino Zagarese
> <qu...@la...>
> > > wrote:
> > > >
> > > > > Hi,
> > > > > I've been watching the Simple Framework and
> I
> > > found
> > > > > it very useful and
> > > > > pretty complete.
> > > > > I looked at tutorials and javadocs and I
> > > wondered if
> > > > > it's possible to
> > > > > serialize only a single field of a complex
> > > instance
> > > > > variable. I'll show it
> > > > > with an example to make it more clear.
> > > > >
> > > > > public class Class1{
> > > > >          @Element
> > > > >          private Class3 class3;
> > > > >
> > > > >          @Attribute
> > > > >          private long id;
> > > > >
> > > > > }
> > > > >
> > > > >
> > > > > public class Class2{
> > > > >           //I want to serialize only the id 
> of
> > > the
> > > > > class1 variable, not the
> > > > > whole state
> > > > >           @Attribute(name="class1"
> > > > > references=Class1.id)
> > > > >           private Class1 class1;
> > > > >
> > > > > }
> > > > >
> > > > > I'm using Simple to serialize AJAX responses
> and
> > > > > this feature could be very
> > > > > useful when you want to show a list of
> > > items(i.e.
> > > > > products in e-commerce
> > > > > apps), but you don't want to load all
> related
> > > data.
> > > > > Sorry for my English.
> > > > > Regards
> > > > >
> > > > >
> > > > >
> > > > > --
> > > > > Quirino Zagarese
> > > > >
> > > > > LaszloItalia Founder (www.laszloitalia.org)
> > > > > Software Development Manager - Galilaeus
> s.r.l.
> > > > > (www.galilaeus.net)
> > > > > >
> > > >
> > >
> >
>
-------------------------------------------------------------------------
> > > > > This SF.net email is sponsored by: Microsoft
> > > > > Defy all challenges. Microsoft(R) Visual
> Studio
> > > > > 2008.
> > > > >
> > > >
> > >
> >
>
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> > > >
> _______________________________________________
> > > > > Simple-support mailing list
> 
=== message truncated ===



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Re: [Simple-support] Serializing/ deserializing Maps with null values

[Niall G. <gal...@ya...>]

Hi, 

This seems like a bug, there is an if statement in the
Map converters that checks for null values, ill modify
this and add it to the next release.

In general, if you can serialize and not deserialize
then there is a bug somewhere. Every serialization
should be fully capable of deserialization.

Niall

--- Stanislaw Osinski <sta...@ca...>
wrote:

> Hi once more,
> 
> Does the framework currently support serializing/
> deserializing maps with
> null values (see code below)? The serializer seems
> to output an empty node
> for such entries (with no key), which causes the
> deserializer to fail.
> Obviously, I can hack this around quite easily, but
> I was wondering if this
> is the intended behaviour?
> 
> @Root
> public class SimpleTest
> {
>     @ElementMap
>     private Map<String, String> test = new
> HashMap<String, String>();
> 
>     public static void main(String [] args) throws
> Exception
>     {
>         SimpleTest test = new SimpleTest();
>         test.test.put("test", null);
> 
>         Persister persister = new Persister();
>         persister.write(test, System.out);
>     }
> }
> 
> Cheers,
> 
> Staszek
> >
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Re: [Simple-support] Limiting CycleStrategy to affect only objects of a certain type

[Niall G. <gal...@ya...>]

Hi,

Yes you can, I use a filter like pattern to do this.
For example if you wrote the following.

public class AttributeModifier implements Strategy {

   private Strategy strategy;

   public AttributeModifier(Strategy strategy) {
      this.strategy = strategy;
   }

   // remainder here...

   public boolean setElement(Class field, Object
value, NodeMap node, Map map) throws Exception;
      boolean result = strategy.setElement(field,
value, node, map);
      Node node = node.remove("id");

      if(MyClass.class.isInstance(value)) {
         node.put(node.getValue());
      }
      return result;
   }
}

Here you can just pass this strategy in to the
persister instead of directly using the CycleStrategy.
This will remove "id" from all by your desirec
classes. Here in this example I assume MyClass.class
is the only class with which "id" attributes are used.
If you really want limited "id" attributes you could
serialize twice, once to collect "id" and "reference"
labels the second time to ensure if a "reference" did
not exist for the "id" then the "id" is removed. A
simple HashMap could do this, but it would require you
to extend the Persister object, to capture the
reference cycles before the second serialization to
right only limited "id" and references.

Niall

--- Stanislaw Osinski <sta...@ca...>
wrote:

> Hi again,
> 
> One more question: is there any simple way of having
> CycleStrategy append id
> attributes/ resolve references only for objects of
> certain (known at
> compilation time) type(s)? The general motivation is
> that the produced XML
> is intended to be read/ modified by humans, so I'd
> like to avoid polluting
> it with id attributes for object that do not need
> reference resolution.
> 
> Cheers,
> 
> Staszek
> >
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