Browse a directory in Velocity Template Language with Telosys

Question

I am trying to write templates in VTL to generate java classes with telosys. My starting point is a directory (src/main/resources/templates/es) that contains json files (mapping1.json, mapping2.json, ...). The number and names of json files are unknown and may vary. I have to generate several java classes per json files.

I have already write a template for each java classe that i have to generate. But these templates work with a static embedded json object.

This an example:

#set($json = {  
   "template":"acces_formation",
   "mappings":{  
      "data":{  
         "properties":{  
            "MATRICULE":{  
               "type":"string",
               "index":"not_analyzed"
            },
            "NOM":{  
               "type":"string",
               "index":"not_analyzed"
            },
            "DATE_NAIS":{  
               "type":"date",
               "format":"dd/MM/yyyy"
            },
            "SEXE":{  
               "type":"string",
               "index":"not_analyzed"
            },
            "GRADE":{  
               "type":"string",
               "index":"not_analyzed"
            }
         }
      }
   }
})
#macro(javaName $s)$s.substring(0,1).toUpperCase()$s.substring(1)#end
#macro(setter $s)set#javaName($s)#end
#macro(getter $s)get#javaName($s)#end
###############################start macro toCamelCase
#macro(toCamelCase $s)
#set($datas = $s.split("_"))
#set($name = "")
#foreach($data in $datas)
#set($data = $data.substring(0,1).toUpperCase()+$data.substring(1))
#set($name = $name+$data)
#end
$name##
#end
###############################End macro toCamelCase
###############################Start macro tab
#macro(tab $nbreTotal)
#if($nbreTotal >= 1)
#foreach($nbre in [1..$nbreTotal])
##
#end
#end
#end
###############################End macro tab
###############################Start macro javaType
#macro(javaType $f, $nbreTab)
#if($f.equals("string"))
#tab($nbreTab)String##
#elseif($f.equals("boolean"))
#tab($nbreTab)Boolean##
#elseif($f.equals("long"))
#tab($nbreTab)Long##
#elseif($f.equals("float"))
#tab($nbreTab)Float##
#elseif($f.equals("double"))
#tab($nbreTab)Double##
#elseif($f.equals("int"))
#tab($nbreTab)Integer##
#elseif($f.equals("integer"))
#tab($nbreTab)Integer##
#elseif($f.equals("date"))
#tab($nbreTab)String##
#elseif($f.equals("array"))
#tab($nbreTab)java.util.List<#javaType($f)>##
#else
#tab($nbreTab)$f##
#end
#end
###############################End macro javaType
#############################################

#set($templateName = $json.template)
#set($entity = "#toCamelCase($json.template)")
#set($entityDto = $entity+"Dto")
#set($param = "_param")

/*

Java dto for elasticSearch template $templateName
Created on $today.date ( Time $today.time )
Generator tool : $generator.name ( version $generator.version )
*/
package ${target.javaPackageFromFolder(${SRC})};

import java.util.Date;
import ${ROOT_PKG}.helper.contract.SearchParam;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.JsonPropertyOrder;
import com.fasterxml.jackson.databind.PropertyNamingStrategy;
import com.fasterxml.jackson.databind.annotation.JsonNaming;
import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;
import lombok.ToString;

/**

DTO for elasticSearch template "$templateName"
@author Lazare yao
*/
@JsonInclude(JsonInclude.Include.NON_NULL)
@JsonPropertyOrder(alphabetic = true)
@getter
@Setter
@NoArgsConstructor
@tostring

public class $entityDto implements Cloneable {
#set($properties = $json.mappings.data.properties)
    private String#tab(3)_id;

#foreach($key in $properties.keySet())
#set($field = $key.toLowerCase())
#tab(1)private #javaType($properties.get($key).type,0)#tab(3)$field ;
#end

    private SearchParam#tab(3)_id$param;
#foreach($key in $properties.keySet())
#set($field = $key.toLowerCase())
#tab(1)private SearchParam<#javaType($properties.get($key).type,0)>#tab(3)${field}$param;
#end

    private String orderDirection;
    private String orderField;
}

What i need now is to:

1- browse my json directory, get each json file and apply the templates on that json to create the java classes for that json file.

2- properly configure the file templates.cfg to create java class file with the java class name. Concerning this point, i heve tried to modify the variable ${BEANNAME}, ${BEANNAME_UC}, ${BEANNAME_LC} (given by default by telosys) since the template. But it did not work: They still empty and No file is generated. This is the content of the file templates.cfg :

#---------------------------------------------------------
# Templates configuration file
# Values separated by ";"
# . value 1 : the label
# . value 2 : the file to be generated ( var allowed : ${BEANNAME}, ${BEANNAME_UC}, ${BEANNAME_LC} )
# . value 3 : the project folder where to generate ( var allowed : ${BEANNAME}, ${BEANNAME_UC}, ${BEANNAME_LC} )
# . value 4 : the template to use
# . value 5 : number of execution : "1" for "ONCE" for all entities, default is multiple executions ( executed for each entity )
#---------------------------------------------------------
# Since v 2.0 the project's variables can be used in file and folder name
#---------------------------------------------------------


Dto                ; ${BEANNAME}Dto.java                  ; ${SRC}/${ROOT_PKG}/helper/dto                       ; dto.vm

CustomDto          ; _${BEANNAME}Dto.java                 ; ${SRC}/${ROOT_PKG}/helper/dto/customize             ; _dto.vm

Enum               ; ${BEANNAME}Enum.java                 ; ${SRC}/${ROOT_PKG}/helper/enums                     ; enum.vm

Repository         ; ${BEANNAME}Repository.java           ; ${SRC}/${ROOT_PKG}/dao/repository/es                ; repository.vm         ;

Custom Repository  ; _${BEANNAME}Repository.java          ; ${SRC}/${ROOT_PKG}/dao/repository/es/customize      ; _repository.vm        ;

Business           ; ${BEANNAME}Business.java             ; ${SRC}/${ROOT_PKG}/business/                        ; business.vm

Controller         ; ${BEANNAME}Controller.java           ; ${SRC}/${ROOT_PKG}/rest/api                         ; controller.vm

Thank you for helping me please !

Lazcool · Accepted Answer

Thank you for your help. I did what @lgu explained to me above and it works very well. But with this version i can't choose which json file i want to generate the java classes. I can not also choose which template file i want to apply. These 2 problems make me think to an other version with an other way to do what i want: I thought about taking advantage of the dbrep file. So in 2nd version, i generate the dbrep file (which is an xml file) with the DOM of java. I followed this tutorial to fill the dbrep xml tag with the json files elements. Each json file becomes a

element in the the element. And the json file properties become the elements in the

element. The final dbrep file look like this:

I did not need to write more templates. I used the same tempates I use for generation from Mysql and everything is done

Browse a directory in Velocity Template Language with Telosys

Answers (2)

Related Questions