Builder Of EMF Models
The aim of the BOEM library is to provide an API that eases the creation of EMF Model using XTend syntax. Using such syntax helps to:
- Speed up the creation of tests
- Improve the readability of the tests
- Improve maintainability when the tested metamodel changes
- Ease the creation of inter-connected models
It has been created and used in industrial project to ease the creation input for JUnit tests on the metamodel and business rules.
Install the feature BOEM Feature (fr.ibp.odv.boem.feature) from one of the following update sites:
Create a BOEM factory
extension BoemFactory factory = new BoemFactory(YourMM.eINSTANCE)Use the keyword extension in order to use all public methods from the BOEM factory anywhere in your class
Import static APIs
import static extension fr.ibp.odv.boem.lib.Boems.*All the examples use the following metamodel:
// Simple creation
val model = A.build [
name = "AName"
].buildTreeval model = A.build [
name = "AName";
// Single valued containment feature
childNodeA = Node.build [
name = "SingleChildName"
]
// Adds one child
childrenNodeA += Node.build [
name = "ANodeName0"
]
// Adds several children at once
childrenNodeA += #[
Node.build [
name = "ANodeName1"
],
Node.build [
name = "ANodeName2"
]
]
].buildTreeval model = B.build [
name = "AName"
// Adds one child with reference
childrenNodeA += "id0" >> Node.build [
name = "ANodeName0"
]
// Adds several children at once with references
childrenNodeA += #[
"id1" >> Node.build [
name = "ANodeName1"
],
"id2" >> Node.build [
name = "ANodeName2"
]
]
// Adds several children at once with references
childrenNodeB += #[
"id3" >> Node.build [
name = "ANodeName3"
],
"id4" >> Node.build [
name = "ANodeName4"
]
]
].buildTree
// Accessing node
assertEquals("ANodeName0", model.access(Node, "id0").name)
assertEquals("ANodeName1", model.access(Node, "id1").name)
assertEquals("ANodeName2", model.access(Node, "id2").name)
assertEquals(2, model.root.childrenNodeB.size)
assertEquals("ANodeName3", model.access(Node, "id3").name)
assertEquals("ANodeName4", model.access(Node, "id4").name)You can even register an id provider against the BoemFactory. It will compute an id for each element (at build time) using your rules. For example:
extension BoemFactory factory = new BoemFactory(BoemTestPackage.eINSTANCE).registerIdProvider([
if (it instanceof NamedElement) {
return it.name
}
return null
])
//...
val model = B.build [
name = "AName"
// Adds one child with reference
childrenNodeA += Node.build [
name = "ANodeName0"
]
// Adds several children at once with references
childrenNodeA += #[
Node.build [
name = "ANodeName1"
],
Node.build [
name = "ANodeName2"
]
]
// Adds several children at once with references
childrenNodeB += #[
Node.build [
name = "ANodeName3"
],
Node.build [
name = "ANodeName4"
]
]
].buildTree
// Accessing node
assertEquals("ANodeName0", model.access(Node, "ANodeName0").name)
assertEquals("ANodeName1", model.access(Node, "ANodeName1").name)
assertEquals("ANodeName2", model.access(Node, "ANodeName2").name)
assertEquals(2, model.root.childrenNodeB.size)
assertEquals("ANodeName3", model.access(Node, "ANodeName3").name)
assertEquals("ANodeName4", model.access(Node, "ANodeName4").name)You can also use a shorter syntax to access your elements
val model = A.build [
name = "AName"
childrenNodeA += "id1" >> Node.build [
name = "ANode"
]
].buildTree
val target = model.access(Node, "id1");
val target2 = ("id1" => model) as Node
assertTrue(target2 == target)
val target3 = model.access("id1")
assertTrue(target3 == target)
assertTrue(target == "id1" => model)val it = A.build [
name = "AName"
autoContainementA += "id0" >> B.build [
referenceNodeA = Node.buildRef("id1")
]
childrenNodeA += "id1" >> Node.build [
name = "ANode"
]
].buildTreeor with a shorter syntax
val it = A.build [
name = "AName"
autoContainementA += "id0" >> B.build [
referenceNodeA = Node << "id1"
]
childrenNodeA += "id1" >> Node.build [
name = "ANode"
]
].buildTreeval model = A.build [
autoContainementA += "B" >> B.build [
autoContainementA += "D" >> C.build
]
].buildTree
assertEquals(null, model.root.name)
assertEquals(null, model.access(NamedElement, "B").name)
assertEquals(null, model.access(A, "C").name)
model.update [
name = "NameA"
autoContainementA.get(0).with [
name = "NameB"
autoContainementA.get(0).with [
name = "NameD"
]
]
]
assertEquals("NameA", model.root.name)
assertEquals("NameB", model.access(B, "B").name)
assertEquals("NameC", model.access(C, "C").name)
model.access(B, "B").name = "NameB2"
model.access(C, "C").name = "NameB2"
assertEquals("NameB2", model.access(B, "B").name)
assertEquals("NameC2", model.access(C, "C").name)- Fork it!
- Create your feature branch:
git checkout -b my-new-feature - Commit your changes:
git commit -am 'Add some feature' - Push to the branch:
git push origin my-new-feature - Submit a pull request 😃
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