Asynchronous Expression Engine
expr := expr '==' term | expr '!=' term | expr '>' term | expr '<' term | expr '>=' term | expr term | term
term := expr OR term1 | expr AND term1 | term1
term1 := expr '+' term2 | expr '-' term2 | term2
term2 := expr '*' term3 | expr '/' term3 | term3
term3 := '(' expr ')' | decimal_literal | string_literal | boolean_literal | identifier
decimal_literal := regex [0-9][0-9]*[\.]?[0-9]*
string_literal := regex
boolean_literal := TRUE | FALSEBpmn expression example:
$task.firstname = secretary.firstname,
$task.lastname = secretary.lastname,
$task.middlename = secretary.middlename,
$task.fullname = $task.firstname + " " + $task.lastname + " " + $task.middlename,
$task.status = $task.fullname + " ("+ secretary.status + ")",
$task.counter = ($task.counter + 2) * 2,
$task.counter = ($task.counter + 2) * 2,
$task.counter = ($task.counter + 2) * 2,
$process.counter = $task.counter,
$project.counter = $process.counter + 1,
$task.counter = "4", // value conversion
$project.manager = secretary // object import
Json object
{
"isEmployee" : {
"value" : true,
"path" : "$.isEmployee",
"type" : "boolean"
},
"form1" : {
"name" : "name1",
"description" : "desc1",
"value" : {
"parent2" : {
"description" : "Reference to parent object",
"value" : {
"value" : {
"lastname" : {
"value" : "xx",
"path" : "$.form1.parent.lastname",
"type" : "string"
},
"firstname" : {
"value" : "xx",
"path" : "$.form1.parent.firstname",
"type" : "string"
},
"middlename" : {
"value" : "xx",
"path" : "$.form1.parent.middlename",
"type" : "string"
}
},
"path" : "$.form1.parent",
"type" : "object"
},
"ref" : "$.form1.parent",
"path" : "$.form1.parent2",
"type" : "ref"
},
"parent" : {
"value" : {
"lastname" : {
"value" : "xx",
"path" : "$.form1.parent.lastname",
"type" : "string"
},
"firstname" : {
"value" : "xx",
"path" : "$.form1.parent.firstname",
"type" : "string"
},
"middlename" : {
"value" : "xx",
"path" : "$.form1.parent.middlename",
"type" : "string"
}
},
"path" : "$.form1.parent",
"type" : "object"
},
"middlename" : {
"value" : "middlename",
"path" : "$.form1.middlename",
"type" : "string"
},
"data" : {
"value" : {
"title" : {
"value" : {
"en" : {
"value" : "Title",
"path" : "$.form1.data.title.en",
"type" : "string"
},
"ru" : {
"value" : "+++",
"path" : "$.form1.data.title.ru",
"type" : "string"
}
},
"path" : "$.form1.data.title",
"type" : "object"
}
},
"path" : "$.form1.data",
"type" : "object"
},
"files" : [
{
"value" : "https://github.com/duberg/object-storage",
"path" : "$.form1.files[0]",
"type" : "string"
},
{
"value" : "https://github.com/duberg/object-storage",
"path" : "$.form1.files[2]",
"type" : "string"
},
{
"value" : "https://github.com/duberg/object-storage",
"path" : "$.form1.files[1]",
"type" : "string"
}
],
"lastname" : {
"value" : "lastname",
"path" : "$.form1.lastname",
"type" : "string"
},
"check" : {
"value" : false,
"path" : "$.form1.check",
"type" : "boolean"
}
},
"path" : "$.form1",
"type" : "object"
},
"x1" : {
"name" : "name1",
"description" : "desc1",
"value" : "name1",
"path" : "$.x1",
"type" : "string"
}
}
Storage as tree
[Storage]
|__isEmployee -> BooleanElement(None,None,true,$.isEmployee)
|__form1 [ObjectElement]
|__parent2 ->
|__$.form1.parent [ObjectElement]
|__lastname -> StringElement(None,None,xx,$.form1.parent.lastname)
|__firstname -> StringElement(None,None,xx,$.form1.parent.firstname)
|__middlename -> StringElement(None,None,xx,$.form1.parent.middlename)
|__parent [ObjectElement]
|__lastname -> StringElement(None,None,xx,$.form1.parent.lastname)
|__firstname -> StringElement(None,None,xx,$.form1.parent.firstname)
|__middlename -> StringElement(None,None,xx,$.form1.parent.middlename)
|__middlename -> StringElement(None,None,middlename,$.form1.middlename)
|__data [ObjectElement]
|__title [ObjectElement]
|__en -> StringElement(None,None,Title,$.form1.data.title.en)
|__ru -> StringElement(None,None,+++,$.form1.data.title.ru)
|__files [ArrayElement]
|__ -> StringElement(None,None,https://github.com/duberg/object-storage,$.form1.files[0])
|__ -> StringElement(None,None,https://github.com/duberg/object-storage,$.form1.files[1])
|__ -> StringElement(None,None,https://github.com/duberg/object-storage,$.form1.files[2])
|__lastname -> StringElement(None,None,lastname,$.form1.lastname)
|__check -> BooleanElement(None,None,false,$.form1.check)
|__x1 -> StringElement(Some(name1),Some(desc1),name1,$.x1)
Storage representation
form1.files -> ArrayMetadata(None,None,form1.files)
form1.files[2] -> StringElement(None,None,https://github.com/duberg/object-storage,form1.files[2])
form1.data -> ObjectMetadata(None,None,form1.data)
form1.parent2 -> RefMetadata(None,Some(Reference to parent object),form1.parent,form1.parent2)
form1.lastname -> StringElement(None,None,lastname,form1.lastname)
form1.files[1] -> StringElement(None,None,https://github.com/duberg/object-storage,form1.files[1])
form1.parent.firstname -> StringElement(None,None,xx,form1.parent.firstname)
form1 -> ObjectMetadata(Some(name1),Some(desc1),form1)
form1.parent.middlename -> StringElement(None,None,xx,form1.parent.middlename)
form1.files[0] -> StringElement(None,None,https://github.com/duberg/object-storage,form1.files[0])
form1.parent.lastname -> StringElement(None,None,xx,form1.parent.lastname)
form1.parent -> ObjectMetadata(None,None,form1.parent)
form1.middlename -> StringElement(None,None,middlename,form1.middlename)
x1 -> StringElement(Some(name1),Some(desc1),name1,x1)
form1.data.title.ru -> StringElement(None,None,+++,form1.data.title.ru)
form1.check -> BooleanElement(None,None,false,form1.check)
isEmployee -> BooleanElement(None,None,true,isEmployee)
form1.data.title.en -> StringElement(None,None,Title,form1.data.title.en)
form1.data.title -> ObjectMetadata(None,None,form1.data.title)