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DTO Templates for v2.5 ?

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kiran.adigopula
User
Posts: 6
Joined: 02-Oct-2007
# Posted on: 02-Oct-2007 06:47:05   

Hello,

I am trying to use the DTO template that is listed in the forums on LLBL Pro 2.5; I have copied the exact code and followed all the steps for setting up the template as a "AdditionalTemplate". However, when I generate code I get a "Object not set to an instance of the object" error. Will the 2.0 template work in 2.5 without any changes or am I missing something ?

Object reference not set to an instance of an object.

-----[Core exception]--------------------
   at SD.LLBLGen.Pro.LptParser.DotNetTemplateEngine.Perform(IGenerator executingGenerator, ITask taskDefinition, Dictionary`2 parameters)
   at SD.LLBLGen.Pro.ApplicationCore.Tasks.Task.Perform(IGenerator executingGenerator, LogNode parentNode)
   at SD.LLBLGen.Pro.ApplicationCore.Tasks.TaskGroup.Perform(IGenerator executingGenerator, LogNode parentNode)
   at SD.LLBLGen.Pro.ApplicationCore.Tasks.TaskGroup.Perform(IGenerator executingGenerator, LogNode parentNode)
   at SD.LLBLGen.Pro.ApplicationCore.Tasks.TaskGroup.Perform(IGenerator executingGenerator, LogNode parentNode)
   at SD.LLBLGen.Pro.GeneratorCore.Generator.Start(ITaskGroup tasksToExecute, Project projectDefinition, Language languageToUse, Platform platformToUse, List`1 templateBindingsToUse, String templateGroupToUse, ApplicationConfiguration configurationSettings)
   at SD.LLBLGen.Pro.Gui.Forms.MainWindow.StartGeneratorProcess()

Thanks Kiran

goose avatar
goose
User
Posts: 392
Joined: 06-Aug-2007
# Posted on: 02-Oct-2007 17:54:47   

Hi, could you paste the code you're using or the thread link from where you get it?

kiran.adigopula
User
Posts: 6
Joined: 02-Oct-2007
# Posted on: 02-Oct-2007 19:33:37   

I got it from here...... the second version with the Nullable support..... http://www.llblgen.com/tinyforum/Messages.aspx?ThreadID=6261

Here's what I did..... 1. In AdditionalTemplates folder - Added SD.AdditionalTemplates.DTO.NET20.templatebindings - Added DTO folder - Added DTOTemplate.tdl

  1. In Tasks folder - Added DTOTemplate.Tasks

  2. Included the DTO Tasks in the Task Queue while generating code

Thanks for your help Kiran

SD.AdditionalTemplates.DTO.NET20.templatebindings.....

<?xml version="1.0" encoding="utf-8"?>
<templateBindings name="DTO Template" description="Manager templates" precedenceLevel="10" databaseDriverID="2D18D138-1DD2-467E-86CC-4838250611AE" xmlns="http://sd/llblgen/pro/templateBindingsDefinition.xsd">
    <supportedPlatforms>
        <platform name=".NET 2.0" />
    </supportedPlatforms>
    <language name="C#">
        <templateBinding templateID="SD_DTOTemplate" filename="DTO\DTOTemplate.tdl"  />
    </language>
</templateBindings>

DTOTemplate.tdl.....

using System;
using System.ComponentModel;
using System.Collections;
using System.Runtime.Serialization;

using <[RootNamespace]>.EntityClasses;

namespace <[RootNamespace]>.DTOClasses
{
    /// <summary>
    /// DTO class for the entity '<[CurrentEntityName]>'.
    /// </summary>
    [Serializable]
    public <[If UsePartialClasses]>partial <[EndIf]>class <[CurrentEntityName]>DTO <[ If IsSubType ]>: <[ SuperTypeName ]>DTO<[ EndIf]>
    {
        #region Class Member Declarations
<[Foreach EntityField CrLf]>            private <[If IsNullable]><[If IsValueType]>Nullable<<[TypeOfField]>><[Else]><[TypeOfField]><[EndIf]><[Else]><[TypeOfField]><[EndIf]> _<[CaseCamel EntityFieldName]>;<[NextForeach]>
        #endregion
    
        /// <summary>
        /// CTor
        /// </summary>
        public <[CurrentEntityName]>DTO()
        {       
        }

        /// <summary>
        /// CTor which initializes the DTO with values from its corresponding entity
        /// </summary>
        /// <param name="entityInstance">The entity instance which holds the values for this DTO</param>
        public <[CurrentEntityName]>DTO(<[CurrentEntityName]>Entity entityInstance)<[ If IsSubType ]> : base(entityInstance)<[ EndIf]>
        {
<[Foreach EntityField CrLf]>            _<[CaseCamel EntityFieldName]> = entityInstance.<[EntityFieldName]>;<[NextForeach]>
        }
        
        
        /// <summary>
        /// Creates a new entity instance and copies over the values of this DTO
        /// </summary>
        public <[CurrentEntityName]>Entity ToEntity()
        {
            return ToEntity(new <[CurrentEntityName]>Entity());
        }

        
        /// <summary>
        /// Copies over the values of this DTO into the entity passed in.
        /// </summary>
        public <[CurrentEntityName]>Entity ToEntity(<[CurrentEntityName]>Entity toFill)
        {
<[Foreach EntityField CrLf]>            toFill.<[EntityFieldName]> = _<[CaseCamel EntityFieldName]>;<[NextForeach]>
<[ If IsSubType ]>          base.ToEntity(toFill);<[ EndIf]>        
            return toFill;
        }
    
    
<[Foreach EntityField CrLf]>
        /// <summary> The <[EntityFieldName]> property of the Entity <[CurrentEntityName]></summary>
        public <[If EntityFieldOverrides]>override<[Else]>virtual<[EndIf]> <[If IsNullable]><[If IsValueType]>Nullable<<[TypeOfField]>><[Else]><[TypeOfField]><[EndIf]><[Else]><[TypeOfField]><[EndIf]> <[EntityFieldName]>
        {
            get { return _<[CaseCamel EntityFieldName]>;}
            set { _<[CaseCamel EntityFieldName]> = value; }
        }<[NextForeach]>
    }
}

DTO.Template.Taks.......

<?xml version="1.0"?>
<taskGroup xmlns="http://sd/llblgen/pro/taskGroupElementDefinitions.xsd"
        name="DTO Templates" isOptional ="false"
        description="General group of tasks which are used DTO templates.">
<supportedPlatforms>
    <platform name=".NET 2.0" />
</supportedPlatforms>
<supportedTemplateGroups>
    <templateGroup name="Adapter" />
</supportedTemplateGroups>

<taskGroup name="Create Directories">
    <task name="DTODirectoryCreator" assemblyFilename="SD.LLBLGen.Pro.TaskPerformers.dll" taskPerformerClass="SD.LLBLGen.Pro.TaskPerformers.DirectoryCreator">
     <parameters>
        <parameter name="folderToCreate" defaultValue="DTO" isOptional="false" description="The folder to create"/>
        <parameter name="failWhenExistent" defaultValue="false" isOptional="true" description="Flag to signal what to do when the folder already exists. Overrules clearWhenExistent" valueType="boolean"/>
        <parameter name="clearWhenExistent" defaultValue="false" isOptional="true" description="Flag to signal if an existing folder has to be cleared first. Overruled by failWhenExistent" valueType="boolean"/>
     </parameters>
    </task>
</taskGroup>

<taskGroup name="Create DTO Classes" description="Create DTO Classes">
    <task name="DTOClassCreator" assemblyFilename="SD.LLBLGen.Pro.LptParser.dll" taskPerformerClass="SD.LLBLGen.Pro.LptParser.DotNetTemplateEngine">
     <parameters>
        <parameter isOptional="false" name="destinationFolder" defaultValue="DTO"/>
        <parameter isOptional="false" name="failWhenExistent" defaultValue="false"/>
        <parameter isOptional="false" name="filenameFormat" defaultValue="[elementName]DTO.[extension]"/>
        <parameter isOptional="false" name="templateID" defaultValue="SD_DTOTemplate"/>
        <parameter isOptional="false" name="emitType" defaultValue="allEntities"/>
     </parameters>
    </task>
</taskGroup>
</taskGroup>
Walaa avatar
Walaa
Support Team
Posts: 14995
Joined: 21-Aug-2005
# Posted on: 04-Oct-2007 11:42:43   

Please check the following most recent thread about the steps to generate the DTOs: http://www.llblgen.com/TinyForum/Messages.aspx?ThreadID=10504

greenstone
User
Posts: 132
Joined: 20-Jun-2007
# Posted on: 25-Oct-2007 02:39:58   

Hi,

I'm getting the same exception you've reported here.

I'm using the template, templatebinding, task described in: http://www.llblgen.com/TinyForum/Messages.aspx?ThreadID=10504.

Any idea how to resolve the issue?

-----[Core exception]-------------------- at SD.LLBLGen.Pro.LptParser.DotNetTemplateEngine.Perform(IGenerator executingGenerator, ITask taskDefinition, Dictionary2 parameters) at SD.LLBLGen.Pro.ApplicationCore.Tasks.Task.Perform(IGenerator executingGenerator, LogNode parentNode) at SD.LLBLGen.Pro.ApplicationCore.Tasks.TaskGroup.Perform(IGenerator executingGenerator, LogNode parentNode) at SD.LLBLGen.Pro.ApplicationCore.Tasks.TaskGroup.Perform(IGenerator executingGenerator, LogNode parentNode) at SD.LLBLGen.Pro.ApplicationCore.Tasks.TaskGroup.Perform(IGenerator executingGenerator, LogNode parentNode) at SD.LLBLGen.Pro.GeneratorCore.Generator.Start(ITaskGroup tasksToExecute, Project projectDefinition, Language languageToUse, Platform platformToUse, List1 templateBindingsToUse, String templateGroupToUse, ApplicationConfiguration configurationSettings) at SD.LLBLGen.Pro.Tools.TemplateEditor.MainForm.RunTasks(Generator toRun, ITaskGroup tasksToRun, Project projectToUse)

I also tried stripping the dto.template to an empty shell (and still get the same exception):

using System; using System.ComponentModel; using System.Collections; using System.Runtime.Serialization;

using <[RootNamespace]>.EntityClasses;

namespace <[RootNamespace]>.DTOClasses { /// <summary> /// DTO class for the entity '<[CurrentEntityName]>'. /// </summary> [Serializable] public <[If UsePartialClasses]>partial <[EndIf]>class <[CurrentEntityName]>DTO <[ If IsSubType ]>: <[ SuperTypeName ]>DTO<[ EndIf]> {

}

}

Otis avatar
Otis
LLBLGen Pro Team
Posts: 39972
Joined: 17-Aug-2003
# Posted on: 25-Oct-2007 18:02:57   

Will check it out.

Frans Bouma | Lead developer LLBLGen Pro
Otis avatar
Otis
LLBLGen Pro Team
Posts: 39972
Joined: 17-Aug-2003
# Posted on: 26-Oct-2007 11:11:57   

The DotNetTemplateEngine is for .lpt templates, your template uses TDL statements. You should use the task to consume a TDL template and execute the task with that. Could you try that please?

Frans Bouma | Lead developer LLBLGen Pro
greenstone
User
Posts: 132
Joined: 20-Jun-2007
# Posted on: 27-Oct-2007 01:36:42   

Yes, that fixed it up. Thanks! Attached are the templatebinding, template, and tasks for other's future reference.

Template Binding (DTO.templatebindings)...

<?xml version="1.0"?>
<templateBindings xmlns="http://sd/llblgen/pro/templateBindingsDefinition.xsd" name="My DTO template bindings" description="My Monday DTO template bindings" precedenceLevel="11" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://sd/llblgen/pro/templateBindingsDefinition.xsd
C:\PROGRA~1\SOLUTI~1\LLBLGE~1.5\Tasks\XSDs\templateBindingsDefinition.xsd">
        <supportedPlatforms>
                <platform name=".NET 2.0"/>
        </supportedPlatforms>
        <language name="C#">
                <templateBinding templateID="Dto" filename="SharedTemplates\Net2.x\C#\Dto.template"/>
        </language>
        <language name="VB.NET">
                <!-- If you're using VB.NET, you've should add the binding above here instead. -->
        </language>
</templateBindings>

Template (DTO.template)...

using System;
using System.ComponentModel;
using System.Collections;
using System.Runtime.Serialization;

using <[RootNamespace]>.EntityClasses;

namespace <[RootNamespace]>.DTOClasses
{
    /// <summary>
    /// DTO class for the entity '<[CurrentEntityName]>'.
    /// </summary>
    [Serializable]
    public <[If UsePartialClasses]>partial <[EndIf]>class <[CurrentEntityName]>DTO <[ If IsSubType ]>: <[ SuperTypeName ]>DTO<[ EndIf]>
    {
        #region Class Member Declarations
<[Foreach EntityField CrLf]>            private <[If IsNullable]><[If IsValueType]>Nullable<<[TypeOfField]>><[Else]><[TypeOfField]><[EndIf]><[Else]><[TypeOfField]><[EndIf]> _<[CaseCamel EntityFieldName]>;<[NextForeach]>
        #endregion
    
        /// <summary>
        /// CTor
        /// </summary>
        public <[CurrentEntityName]>DTO()
        {
          int junkTest = 1;     
        }


        /// <summary>
        /// CTor which initializes the DTO with values from its corresponding entity
        /// </summary>
        /// <param name="entityInstance">The entity instance which holds the values for this DTO</param>
        public <[CurrentEntityName]>DTO(<[CurrentEntityName]>Entity entityInstance)<[ If IsSubType ]> : base(entityInstance)<[ EndIf]>
        {
<[Foreach EntityField CrLf]>            _<[CaseCamel EntityFieldName]> = entityInstance.<[EntityFieldName]>;<[NextForeach]>
        }
        
        
        /// <summary>
        /// Creates a new entity instance and copies over the values of this DTO
        /// </summary>
        public <[CurrentEntityName]>Entity ToEntity()
        {
            return ToEntity(new <[CurrentEntityName]>Entity());
        }

        
        /// <summary>
        /// Copies over the values of this DTO into the entity passed in.
        /// </summary>
        public <[CurrentEntityName]>Entity ToEntity(<[CurrentEntityName]>Entity toFill)
        {
<[Foreach EntityField CrLf]>            toFill.<[EntityFieldName]> = _<[CaseCamel EntityFieldName]>;<[NextForeach]>
<[ If IsSubType ]>          base.ToEntity(toFill);<[ EndIf]>        
            return toFill;
        }
    
    
<[Foreach EntityField CrLf]>
        /// <summary> The <[EntityFieldName]> property of the Entity <[CurrentEntityName]></summary>
        public <[If EntityFieldOverrides]>override<[Else]>virtual<[EndIf]> <[If IsNullable]><[If IsValueType]>Nullable<<[TypeOfField]>><[Else]><[TypeOfField]><[EndIf]><[Else]><[TypeOfField]><[EndIf]> <[EntityFieldName]>
        {
            get { return _<[CaseCamel EntityFieldName]>;}
            set { _<[CaseCamel EntityFieldName]> = value; }
        }<[NextForeach]>
    }
}

Tasks (DTO.tasks)...

<?xml version="1.0"?>
<taskGroup xmlns="http://sd/llblgen/pro/taskGroupElementDefinitions.xsd" name="DTO Templates" isOptional="false" description="General group of tasks which are used DTO templates." xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://sd/llblgen/pro/taskGroupElementDefinitions.xsd
C:\PROGRA~1\SOLUTI~1\LLBLGE~1.5\Tasks\XSDs\taskGroupElementDefinitions.xsd">
    <supportedPlatforms>
        <platform name=".NET 2.0"/>
    </supportedPlatforms>
    <supportedTemplateGroups>
        <templateGroup name="Adapter"/>
    </supportedTemplateGroups>
        <dependencies/>
    <taskGroup name="Create Directories" description="DTO Directory Creator TaskGroup" isOptional ="true" requiresCleanCache="true">
        <task name="DTODirectoryCreator" assemblyFilename="SD.LLBLGen.Pro.TaskPerformers.dll" taskPerformerClass="SD.LLBLGen.Pro.TaskPerformers.DirectoryCreator" description="DTO Directory Creator Task" isOptional ="true" requiresCleanCache="true">
            <supportedPlatforms>
        <platform name=".NET 2.0"/>
    </supportedPlatforms>
    <supportedTemplateGroups>
        <templateGroup name="Adapter"/>
    </supportedTemplateGroups>
        <dependencies/>
            <parameters>
                <parameter name="folderToCreate" defaultValue="DTO" isOptional="false" description="The folder to create"/>
                <parameter name="failWhenExistent" defaultValue="false" isOptional="true" description="Flag to signal what to do when the folder already exists. Overrules clearWhenExistent" valueType="boolean"/>
                <parameter name="clearWhenExistent" defaultValue="false" isOptional="true" description="Flag to signal if an existing folder has to be cleared first. Overruled by failWhenExistent" valueType="boolean"/>
            </parameters>
        </task>
    </taskGroup>
    <taskGroup name="Create DTO Classes" description="Create DTO Classes" isOptional="true">
        <!--<task name="DTOClassCreator" assemblyFilename="SD.LLBLGen.Pro.LptParser.dll" taskPerformerClass="SD.LLBLGen.Pro.LptParser.DotNetTemplateEngine" description="DTO Class Creator Task" isOptional="true">-->
        <task name="DTOClassCreator" assemblyFilename="SD.LLBLGen.Pro.TaskPerformers.dll" taskPerformerClass="SD.LLBLGen.Pro.TaskPerformers.CodeEmitter" description="DTO Class Creator Task" isOptional="true">
            <parameters>
                <parameter isOptional="false" name="destinationFolder" defaultValue="DTO"/>
                <parameter isOptional="false" name="failWhenExistent" defaultValue="false"/>
                <parameter isOptional="false" name="filenameFormat" defaultValue="[elementName]DTO.[extension]"/>
                <!--<parameter isOptional="false" name="templateID" defaultValue="SD_DTOTemplate"/>-->
                <parameter isOptional="false" name="templateID" defaultValue="Dto"/>
                <parameter isOptional="false" name="emitType" defaultValue="allEntities"/>
            </parameters>
        </task>
    </taskGroup>
</taskGroup>
Otis avatar
Otis
LLBLGen Pro Team
Posts: 39972
Joined: 17-Aug-2003
# Posted on: 27-Oct-2007 14:01:27   

Thanks for sharing! smile

Frans Bouma | Lead developer LLBLGen Pro
kiran.adigopula
User
Posts: 6
Joined: 02-Oct-2007
# Posted on: 29-Oct-2007 18:59:51   

you might want to also check for readonly (autoincrement) fields when assigning to/from entities, otherwise it wont compile....

using System;
using System.ComponentModel;
using System.Collections;
using System.Runtime.Serialization;

using <[RootNamespace]>.EntityClasses;

namespace <[RootNamespace]>.DtoClasses
{
    /// <summary>
    /// DTO class for the entity '<[CurrentEntityName]>'.
    /// </summary>
    [Serializable]
    public <[If UsePartialClasses]>partial <[EndIf]>class <[CurrentEntityName]>Dto <[ If IsSubType ]>: <[ SuperTypeName ]>Dto<[ EndIf]>
    {
        #region Class Member Declarations
<[Foreach EntityField CrLf]>            private <[If IsNullable]><[If IsValueType]>Nullable<<[TypeOfField]>><[Else]><[TypeOfField]><[EndIf]><[Else]><[TypeOfField]><[EndIf]> _<[CaseCamel EntityFieldName]>;<[NextForeach]>
        #endregion
    
        /// <summary>
        /// CTor
        /// </summary>
        public <[CurrentEntityName]>Dto()
        {
        }


        /// <summary>
        /// CTor which initializes the DTO with values from its corresponding entity
        /// </summary>
        /// <param name="entityInstance">The entity instance which holds the values for this DTO</param>
        public <[CurrentEntityName]>Dto(<[CurrentEntityName]>Entity entityInstance)<[ If IsSubType ]> : base(entityInstance)<[ EndIf]>
        {
<[Foreach EntityField CrLf]>            _<[CaseCamel EntityFieldName]> = entityInstance.<[EntityFieldName]>;<[NextForeach]>
        }
        
        
        /// <summary>
        /// Creates a new entity instance and copies over the values of this DTO
        /// </summary>
        public <[CurrentEntityName]>Entity ToEntity()
        {
            return ToEntity(new <[CurrentEntityName]>Entity());
        }

        
        /// <summary>
        /// Copies over the values of this DTO into the entity passed in.
        /// </summary>
        public <[CurrentEntityName]>Entity ToEntity(<[CurrentEntityName]>Entity toFill)
        {
<[Foreach EntityField CrLf]><[If Not IsReadOnly]>           toFill.<[EntityFieldName]> = _<[CaseCamel EntityFieldName]>;<[EndIf]><[NextForeach]>
<[ If IsSubType ]>          base.ToEntity(toFill);<[ EndIf]>        
            return toFill;
        }
    
    
<[Foreach EntityField CrLf]>
        /// <summary> The <[EntityFieldName]> property of the Entity <[CurrentEntityName]></summary>
        public <[If EntityFieldOverrides]>override<[Else]>virtual<[EndIf]> <[If IsNullable]><[If IsValueType]>Nullable<<[TypeOfField]>><[Else]><[TypeOfField]><[EndIf]><[Else]><[TypeOfField]><[EndIf]> <[EntityFieldName]>
        {
            get { return _<[CaseCamel EntityFieldName]>;}
            <[If Not IsReadOnly]>set { _<[CaseCamel EntityFieldName]> = value; }<[EndIf]>   
        }<[NextForeach]>
    }
}
Walaa avatar
Walaa
Support Team
Posts: 14995
Joined: 21-Aug-2005
# Posted on: 30-Oct-2007 12:17:46   

Thanks for the tip.