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![Specs
object CsvEntityTest extends Specification { • BDD
val TestReadDir = "/tmp/goldenport.d/read"
val TestCreateDir = "/tmp/goldenport.d/create/CsvEntity" • Behavior Driven
val readonlyCsvFileName = GoldenportTestUtility.readonlyCsvFileName Development
"CsvEntity Read" should {
"CsvEntity DefaultEntitySpace FileDataSource open" in { •
val space = new DefaultEntitySpace
space.addEntityClass(new CsvEntityClass())
val datasource = new FileDataSource(readonlyCsvFileName, space.context)
val mayCsv: Option[GEntity] = space.reconstitute(datasource)
mayCsv must beSome[GEntity]
val csv = mayCsv.get.asInstanceOf[CsvEntity]
csv.open()
csv.width must be(3)
csv.height must be(2)
csv.get(0, 0) must be_==("A") • Specs
csv.get(1, 0) must be_==("B")
csv.get(2, 0) must be_==("C")
csv.get(0, 1) must be_==("X")
csv.get(1, 1) must be_==("Y") • Scala
csv.get(2, 1) must be_==("Z")
csv.close()
}
2010 5 18](https://image.slidesharecdn.com/scaladsl-100517224612-phpapp02/85/Scala-DSL-5-320.jpg)
![DSL HTML
<html>
<head>
<title>TODO </title>
</head>
<body>
<ul>
<li> (20100505)</li>
<li> (20100606)</li>
<li> (20100707)</li>
<li>PC (20100808) [ ]</li>
<li>IDE (20100808) [ ]</li>
</ul>
</body>
</html>
2010 5 18](https://image.slidesharecdn.com/scaladsl-100517224612-phpapp02/85/Scala-DSL-10-320.jpg)
![class MyTodo extends Todo {
name = " "
import scala.collection.mutable.ArrayBuffer
todo(" ")
todo(" ") abstract class Todo {
var name: String = _
todo(" ") val items = new ArrayBuffer[TodoItem]
}
def todo(title: String) {
val item = new TodoItem(title)
items += item
}
}
class TodoItem(val title: String) {
}
2010 5 18](https://image.slidesharecdn.com/scaladsl-100517224612-phpapp02/85/Scala-DSL-13-320.jpg)
![import scala.collection.mutable.ArrayBuffer
class MyTodo extends Todo {
name = " " abstract class Todo {
var name: String = _
val items = new ArrayBuffer[TodoItem]
todo(" ") until 20100505
def todo(title: String): TodoItem = {
todo(" ") until 20100606 val item = new TodoItem(title)
todo(" ") until 20100707 items += item
item
} }
}
class TodoItem(val title: String) {
var untilDate: Int = _
def until(date: Int): TodoItem = {
untilDate = date
this
}
}
2010 5 18
(fluent interface)](https://image.slidesharecdn.com/scaladsl-100517224612-phpapp02/85/Scala-DSL-14-320.jpg)
![import scala.collection.mutable.ArrayBuffer
class MyTodo extends Todo {
name = " " abstract class Todo {
var name: String = _
val items = new ArrayBuffer[TodoItem]
" " until 20100505
def todo(title: String): TodoItem = {
" " until 20100606 val item = new TodoItem(title)
items += item
" " until 20100707 item
}
}
implicit def todoWrapper(title: String): TodoItem =
todo(title)
}
class TodoItem(val title: String) {
var untilDate: Int = _
def until(date: Int): TodoItem = {
untilDate = date
this
}
}
2010 5 18](https://image.slidesharecdn.com/scaladsl-100517224612-phpapp02/85/Scala-DSL-15-320.jpg)
![import scala.collection.mutable.ArrayBuffer
class TodoItem(var title: String) {
abstract class Todo { var untilDate: Int = _
var name: String = _
val items = new ArrayBuffer[TodoItem] def until(date: Int): TodoItem = {
val tasks = new ArrayBuffer[Task] untilDate = date
private[this] var currentTask: Option[Task] = None this
}
def todo(title: String): TodoItem = { }
val item = new TodoItem(title)
currentTask match { class Task(var title: String) {
case Some(tk) => tk.items += item val items = new ArrayBuffer[TodoItem]
case None => items += item var untilDate: Int = _
} }
item
}
def task(title: String)(p: => Unit): Task = {
val tk = new Task(title)
tasks += tk
currentTask = Some(tk)
p
currentTask = None
tk
}
implicit def todoWrapper(title: String): TodoItem = todo(title)
}
2010 5 18
Stack](https://image.slidesharecdn.com/scaladsl-100517224612-phpapp02/85/Scala-DSL-17-320.jpg)
![import scala.collection.mutable.ArrayBuffer
def until: Int = {
abstract class Todo { currentTask.get.untilDate
var name: String = _ }
val items = new ArrayBuffer[TodoItem]
val tasks = new ArrayBuffer[Task] def until_=(value: Int) {
private[this] var currentTask: Option[Task] = None currentTask.get.untilDate = value
}
def todo(title: String): TodoItem = {
val item = new TodoItem(title) implicit def todoWrapper(title: String): TodoItem = todo(title)
currentTask match { }
case Some(tk) => tk.items += item
case None => items += item class TodoItem(var title: String) {
} var untilDate: Int = _
item
} def until(date: Int): TodoItem = {
untilDate = date
def task(title: String)(p: => Unit): Task = { this
val tk = new Task(title) }
tasks += tk }
currentTask = Some(tk)
p class Task(var title: String) {
currentTask = None val items = new ArrayBuffer[TodoItem]
tk var untilDate: Int = _
} }
this
}
}
2010 5 18](https://image.slidesharecdn.com/scaladsl-100517224612-phpapp02/85/Scala-DSL-19-320.jpg)
![MakeTodoDsl
import scala.xml.{XML, Node}
private def makeList(todo: Todo): List[Node] = {
object MakeTodoDsl { (for (item <- todo.items) yield <li>{
def main(args: Array[String]) { "%s(%s)".format(item.title, item.untilDate)
val input = args(0) }</li>).toList :::
val output = args(1) (for (task <- todo.tasks; item <- task.items) yield <li>{
"%s(%s) [%s]".format(item.title, task.untilDate, task.title)
val appClass = Class.forName(input) }</li>).toList
val todo = appClass.newInstance.asInstanceOf[Todo] }
}
val html = <html>
<head>
<title>TODO </title>
</head>
<body>
<ul>
{ makeList(todo) }
</ul>
</body>
</html>
XML.save(output, html, "utf-8")
}
2010 5 18](https://image.slidesharecdn.com/scaladsl-100517224612-phpapp02/85/Scala-DSL-21-320.jpg)
![def main(args: Array[String]) {
val input = args(0)
val output = args(1)
val appClass = Class.forName(input)
val todo = appClass.newInstance.asInstanceOf[Todo]
2010 5 18](https://image.slidesharecdn.com/scaladsl-100517224612-phpapp02/85/Scala-DSL-22-320.jpg)
![private def makeList(todo: Todo): List[Node] = {
(for (item <- todo.items) yield <li>{
"%s(%s)".format(item.title, item.untilDate)
}</li>).toList :::
(for (task <- todo.tasks; item <- task.items) yield <li>{
"%s(%s) [%s]".format(item.title, task.untilDate, task.title)}</li>
).toList
}
2010 5 18](https://image.slidesharecdn.com/scaladsl-100517224612-phpapp02/85/Scala-DSL-24-320.jpg)
![DSL HTML
<html> •
<head>
<title>TODO </title>
</head>
<body>
<ul>
<li> (20100505)</li>
<li> (20100606)</li>
<li> (20100707)</li>
<li>PC (20100808) [ ]</li>
<li>IDE (20100808) [ ]</li>
</ul>
</body>
</html>
2010 5 18](https://image.slidesharecdn.com/scaladsl-100517224612-phpapp02/85/Scala-DSL-25-320.jpg)
Uploaded byTomoharu ASAMI
Scala DSLの作り方
This document discusses Scala as a domain-specific language (DSL) for building other DSLs. Some key points: - Scala can be used to create internal DSLs within applications as well as external DSLs for defining domain concepts. - Examples shown include using Scala for TODO list management, entity-relationship modeling, and processing streaming data. - Scala's traits, classes, functions and other features allow defining DSLs with a natural, domain-focused syntax and semantics.
Scala DSLの作り方
- 1. Scala DSL 2010 5 18 ( Lab) 2010 5 18
- 2. Scala • • • • • JVM Java • Scalable ≒ DSL 2010 5 18
- 3. DSL • Domain Specific Language • • • • OSMU (One Source Multi Use) 2010 5 18
- 4. Scala DSL 2010 5 18
- 5. Specs object CsvEntityTest extends Specification { • BDD val TestReadDir = "/tmp/goldenport.d/read" val TestCreateDir = "/tmp/goldenport.d/create/CsvEntity" • Behavior Driven val readonlyCsvFileName = GoldenportTestUtility.readonlyCsvFileName Development "CsvEntity Read" should { "CsvEntity DefaultEntitySpace FileDataSource open" in { • val space = new DefaultEntitySpace space.addEntityClass(new CsvEntityClass()) val datasource = new FileDataSource(readonlyCsvFileName, space.context) val mayCsv: Option[GEntity] = space.reconstitute(datasource) mayCsv must beSome[GEntity] val csv = mayCsv.get.asInstanceOf[CsvEntity] csv.open() csv.width must be(3) csv.height must be(2) csv.get(0, 0) must be_==("A") • Specs csv.get(1, 0) must be_==("B") csv.get(2, 0) must be_==("C") csv.get(0, 1) must be_==("X") csv.get(1, 1) must be_==("Y") • Scala csv.get(2, 1) must be_==("Z") csv.close() } 2010 5 18
- 6. SimpleModeler case class DER extends DomainResource { • DSL term = " " caption = " " brief = <t></t> description = <text></text> • Scala DSL id(" Id", DVI Id()) attribute(" Name", DVN Name()) } Google App case class DVI Id extends DomainValueId { Engine Java term = " Id" caption = " Id" brief = <t></t> description = <text></text> attribute("value", XString) } 2010 5 18
- 7. SimpleModeler 2010 5 18
- 8. g3 • class Join extends G3Application { agent('compute) { case x: Int => x + 100 • Scala DSL } start(List(1, 2, 3, 4, 5)) split() publish("compute") join() aggregate() } 2010 5 18
- 9. class MyTodo extendsTodo { • TODO name = " " Scala DSL " " until 20100505 • Scala DSL HTML " " until 20100606 " " until 20100707 task(" ") { until = 20100808 todo("PC ") "IDE " until 20100707 } } 2010 5 18
- 10. DSL HTML <html> <head> <title>TODO </title> </head> <body> <ul> <li> (20100505)</li> <li> (20100606)</li> <li> (20100707)</li> <li>PC (20100808) [ ]</li> <li>IDE (20100808) [ ]</li> </ul> </body> </html> 2010 5 18
- 11. DSL 2010 5 18
- 12. class MyTodo extendsTodo { name = " " } abstract class Todo { var name: String = _ } 2010 5 18
- 13. class MyTodo extendsTodo { name = " " import scala.collection.mutable.ArrayBuffer todo(" ") todo(" ") abstract class Todo { var name: String = _ todo(" ") val items = new ArrayBuffer[TodoItem] } def todo(title: String) { val item = new TodoItem(title) items += item } } class TodoItem(val title: String) { } 2010 5 18
- 14. import scala.collection.mutable.ArrayBuffer class MyTodo extends Todo { name = " " abstract class Todo { var name: String = _ val items = new ArrayBuffer[TodoItem] todo(" ") until 20100505 def todo(title: String): TodoItem = { todo(" ") until 20100606 val item = new TodoItem(title) todo(" ") until 20100707 items += item item } } } class TodoItem(val title: String) { var untilDate: Int = _ def until(date: Int): TodoItem = { untilDate = date this } } 2010 5 18 (fluent interface)
- 15. import scala.collection.mutable.ArrayBuffer class MyTodo extends Todo { name = " " abstract class Todo { var name: String = _ val items = new ArrayBuffer[TodoItem] " " until 20100505 def todo(title: String): TodoItem = { " " until 20100606 val item = new TodoItem(title) items += item " " until 20100707 item } } implicit def todoWrapper(title: String): TodoItem = todo(title) } class TodoItem(val title: String) { var untilDate: Int = _ def until(date: Int): TodoItem = { untilDate = date this } } 2010 5 18
- 16. class MyTodo extendsTodo { name = " " " " until 20100505 " " until 20100606 " " until 20100707 task(" ") { todo("PC ") "IDE " until 20100707 } } 2010 5 18
- 17. import scala.collection.mutable.ArrayBuffer class TodoItem(var title: String) { abstract class Todo { var untilDate: Int = _ var name: String = _ val items = new ArrayBuffer[TodoItem] def until(date: Int): TodoItem = { val tasks = new ArrayBuffer[Task] untilDate = date private[this] var currentTask: Option[Task] = None this } def todo(title: String): TodoItem = { } val item = new TodoItem(title) currentTask match { class Task(var title: String) { case Some(tk) => tk.items += item val items = new ArrayBuffer[TodoItem] case None => items += item var untilDate: Int = _ } } item } def task(title: String)(p: => Unit): Task = { val tk = new Task(title) tasks += tk currentTask = Some(tk) p currentTask = None tk } implicit def todoWrapper(title: String): TodoItem = todo(title) } 2010 5 18 Stack
- 18. class MyTodo extendsTodo { name = " " " " until 20100505 " " until 20100606 " " until 20100707 task(" ") { until = 20100808 todo("PC ") "IDE " until 20100707 } } 2010 5 18
- 19. import scala.collection.mutable.ArrayBuffer def until: Int = { abstract class Todo { currentTask.get.untilDate var name: String = _ } val items = new ArrayBuffer[TodoItem] val tasks = new ArrayBuffer[Task] def until_=(value: Int) { private[this] var currentTask: Option[Task] = None currentTask.get.untilDate = value } def todo(title: String): TodoItem = { val item = new TodoItem(title) implicit def todoWrapper(title: String): TodoItem = todo(title) currentTask match { } case Some(tk) => tk.items += item case None => items += item class TodoItem(var title: String) { } var untilDate: Int = _ item } def until(date: Int): TodoItem = { untilDate = date def task(title: String)(p: => Unit): Task = { this val tk = new Task(title) } tasks += tk } currentTask = Some(tk) p class Task(var title: String) { currentTask = None val items = new ArrayBuffer[TodoItem] tk var untilDate: Int = _ } } this } } 2010 5 18
- 20. 2010 5 18
- 21. MakeTodoDsl import scala.xml.{XML, Node} private def makeList(todo: Todo): List[Node] = { object MakeTodoDsl { (for (item <- todo.items) yield <li>{ def main(args: Array[String]) { "%s(%s)".format(item.title, item.untilDate) val input = args(0) }</li>).toList ::: val output = args(1) (for (task <- todo.tasks; item <- task.items) yield <li>{ "%s(%s) [%s]".format(item.title, task.untilDate, task.title) val appClass = Class.forName(input) }</li>).toList val todo = appClass.newInstance.asInstanceOf[Todo] } } val html = <html> <head> <title>TODO </title> </head> <body> <ul> { makeList(todo) } </ul> </body> </html> XML.save(output, html, "utf-8") } 2010 5 18
- 22. def main(args: Array[String]){ val input = args(0) val output = args(1) val appClass = Class.forName(input) val todo = appClass.newInstance.asInstanceOf[Todo] 2010 5 18
- 23. XML val html = <html> <head> <title>TODO </title> </head> <body> <ul> { makeList(todo) } </ul> </body> </html> XML.save(output, html, "utf-8") } 2010 5 18
- 24. private def makeList(todo:Todo): List[Node] = { (for (item <- todo.items) yield <li>{ "%s(%s)".format(item.title, item.untilDate) }</li>).toList ::: (for (task <- todo.tasks; item <- task.items) yield <li>{ "%s(%s) [%s]".format(item.title, task.untilDate, task.title)}</li> ).toList } 2010 5 18
- 25. DSL HTML <html> • <head> <title>TODO </title> </head> <body> <ul> <li> (20100505)</li> <li> (20100606)</li> <li> (20100707)</li> <li>PC (20100808) [ ]</li> <li>IDE (20100808) [ ]</li> </ul> </body> </html> 2010 5 18
- 26. • • • • • • XML • • • apply • (2.8) • update • (2.8) 2010 5 18
- 27. • DSL Scala • Scala Java … • • Scala DSL • • Scala 2010 5 18
- 28. End 2010 5 18