GInfuser

A gosu implementation to map a domain class into a DTO (data transfer object). This utilizes annotations to describe how the fields in the DTO must be populated.

Default Annotations

Annotation	Target	Description
@CalculatedFieldInfuser(sourceType: String, calculateMethod: String, calculateMethodReturnType: String, supportClass: String)	Property	Describes that the value of the property will be calculated from a method (i.e. calculateMethod) of the supportClass. The return type of the method must be specified by calculateMethodReturnType parameter. The sourceType is optional.
@DateFieldInfuser(sourceType: String, sourceField: String, defaultValue: String)	Property	Describes that the string value of the property will be copied from a date property (i.e. sourceField) of the domain class (i.e. sourceType). The string value and the defaultValue is in the format YYYY-MM-DD.
@InfuseFieldInfuser(sourceType: String, sourceField: String, sourceFieldType: String)	Property	Describes that the value of the property will be an output of another infusion based on the property (i.e. sourceField) of a particular type (i.e. sourceFieldType) of the domain class (i.e. sourceType).
@SourceTypeInfuser(sourceType: String)	Class	Describes the type of the class that the DTO depends on. The sourceTypes of the other annotations are all optional.
@StringConstantInfuser(value : String)	Property	Describes that the string property in the DTO will have a specific value identified by the value parameter.
@StringFieldInfuser(sourceType: String, sourceField: String, defaultValue: String)	Property	Describes that the string value of the property will be copied from a string property (i.e. sourceField) of the domain class (i.e. sourceType).

Infuser Class

The Infuser class is the one that interprets the description and perform the necessary actions for each property in the DTO. This class can only be created by an Infuser.Builder class. This class has the following methods:

Infuser Methods

Method	Description
static getBuilder<TYPE_DTO_BUILD>() : Builder<TYPE_DTO_BUILD>	Returns an instance of Infuser.Builder class.
infuse(sourceObject: Object, beanObject: TYPE_BEAN) : TYPE_BEAN	The actual method that infuse the sourceObject to the beanObject.

Infuser.Builder Class

The only class that can create an instance of Infuser and it can be created by invoking Infuser.getBuilder() method.

Builder Methods

Method	Description
addInfuser(infuserObject : IInfuser) : Builder<TYPE_BEAN_BUILD>	Add a single implementation of IInfuser.
addInfusers(infuserObjects : List<IInfuser>) : Builder<TYPE_BEAN_BUILD>	Add a multiple implementation of IInfusers.
async() : Builder<TYPE_BEAN_BUILD>	The infuser method of the Infuser instance might run each property processing in parallel.
build() : Infuser<TYPE_BEAN_BUILD>	The method the return an instance of Infuser.
sync() : Builder<TYPE_BEAN_BUILD>	The infuser method of the Infuser instance is running the property processing in synchronous.

Custom IInfuser Implementation

Usage

As a Code Dependency to Your Gosu Project

Add the following maven dependency to your gosu project:

Property	Value
Group ID	xyz.ronella.gosu
Artifact ID	ginfuser
Version	1.1.0

Using gradle, this can be added as a dependency entry like the following:

compile group: 'xyz.ronella.gosu', name: 'ginfuser', version: '1.1.0'

Sample Usage

SampleClass Class

class SampleClass {

  private var _field1 : String as Field1
  private var _field2 : String as Field2
  private var _names : List<String> as Nomenclatures = {}
  private var _date : Date as StartDate
  private var _enddate : Date as EndDate
  private var _sampleClass2 : SampleClass2 as SubClass

}

SampleClass2 Class

class SampleClass2 {

  private var _field1 : String as Field1
  private var _field2 : String as Field2
  private var _names : List<String> as Nomenclatures = {}
  private var _date : Date as StartDate

}

SampleDTO Class

@SourceTypeInfuser("SampleClass")
final class SampleDTO {

  @StringFieldInfuser(:sourceField = "Field1", :defaultValue = "Default1")
  private var _col1 : String as Column1

  @StringFieldInfuser(:sourceField = "Field2")
  private var _col2 : String as Column2

  @CalculatedFieldInfuser(
      :calculateMethod = "generateNames", :calculateMethodReturnType = "java.util.List<String>",
      :supportClass = "SampleSupport"
  )
  private var _names : List<String> as Names

  @DateFieldInfuser(:sourceField = "StartDate")
  private var _date : String as Date

  @DateFieldInfuser(:sourceField = "EndDate", :defaultValue = "2021-03-17")
  private var _date2 : String as Date2

  @StringConstantInfuser(:value =  "Constant")
  private var _tmp : String as Dummy

  @InfuseFieldInfuser(:sourceField = "SubClass",
    :sourceFieldType = "SampleClass2"
  )
  private var _childClass : SampleDTO2 as ChildClass

}

SampleDTO2 Class

@SourceTypeInfuser("SampleClass2")
class SampleDTO2 {

  @StringFieldInfuser(:sourceField = "Field1",
      :defaultValue = "no-value"
  )
  private var _col1 : String as Column1

  @StringFieldInfuser(:sourceField = "Field2"
      , :defaultValue = "no-value"
  )
  private var _col2 : String as Column2

  @CalculatedFieldInfuser(
      :calculateMethod = "generateNames2",
      :calculateMethodReturnType = "java.util.List<String>",
      :supportClass = "SampleSupport"
  )
  private var _names : List<String> as Names

  @DateFieldInfuser(:sourceField = "StartDate"
      , :defaultValue = "no-date"
  )
  private var _date : String as Date

  @StringConstantInfuser(:value =  "Constant2")
  private var _tmp : String as Dummy

}

SampleSupport Class

class SampleSupport {

  public function generateNames(sourceObject : Object, beanObject : Object) : List<String> {
    var tests : List<String> = {}
    if (sourceObject typeis SampleClass) {
      tests.addAll(sourceObject.Nomenclatures)
    }
    return tests
  }

  public function generateNames2(sourceObject : Object, beanObject : Object) : List<String> {
    var tests : List<String> = {}
    if (sourceObject typeis SampleClass2) {
      tests.addAll(sourceObject.Nomenclatures)
    }
    return tests
  }
}

Infusing the SampleClass to SampleDTO

var sampleClass = new SampleClass()
var sampleClass2 = new SampleClass2()

sampleClass.SubClass = sampleClass2
sampleClass.Field1 = "Field1"
sampleClass.StartDate = Date.create(2020, Month.MARCH, 17, 0, 0, 0, 0)
sampleClass.Nomenclatures = {"One", "Two"}

sampleClass2.Field1 = "SubClassTest"

var sampleDTO = Infuser.getBuilder<SampleDTO>().async().build().infuse(sampleClass, new SampleDTO())

print("sampleDTO.Column1: ${sampleDTO.Column1}")
print("sampleDTO.Date: ${sampleDTO.Date}")
print("sampleDTO.Names: ${sampleDTO.Names}")
print("sampleDTO.ChildClass.Column1: ${sampleDTO.ChildClass.Column1}")

The output will be as described in the SampleDTO class

sampleDTO.Column1: Field1
sampleDTO.Date: 2020-03-17
sampleDTO.Names: [One, Two]
sampleDTO.ChildClass.Column1: SubClassTest

License

This project is licensed under the MIT License - see the LICENSE.md file for details

Build

Changelog

Author

• Ronaldo Webb