Exercise 2 - Implementation

Base Transformation

Transformation class containing the MT definition. All rules are defined in the ruleStore().

package flowchartToHtmlExamples
import static yamtl.dsl.Rule.*
import org.eclipse.emf.ecore.EPackage
import yamtl.core.YAMTLModule
import yamtl.groovy.YAMTLGroovyExtensions
import yamtl.groovy.YAMTLGroovyExtensions_dynamicEMF

class Example2 extends YAMTLModule {
    public Example2(EPackage flowchartPk, EPackage htmlPk) {
        YAMTLGroovyExtensions_dynamicEMF.init(this)

        header().in("in", flowchartPk).out("out", htmlPk)

        ruleStore([
            //TODO: Update the rule with a .filter{} block
            rule('SelectedTransitions2Text')
                .in("t", flowchartPk.Transition)
                .out("p", htmlPk.P, {
                    p.value = "Node: ${t.source.name} --> Transition: ${t.name}".toString()
                })
        ])

    }
}

Solution

The correct transformation definition for this problem is:

package flowchartToHtmlExamples
import static yamtl.dsl.Rule.*
import org.eclipse.emf.ecore.EPackage
import yamtl.core.YAMTLModule
import yamtl.groovy.YAMTLGroovyExtensions
import yamtl.groovy.YAMTLGroovyExtensions_dynamicEMF

class Example2 extends YAMTLModule {
    public Example2(EPackage flowchartPk, EPackage htmlPk) {
        YAMTLGroovyExtensions_dynamicEMF.init(this)

        header().in("in", flowchartPk).out("out", htmlPk)



        ruleStore([
            rule('SelectedTransitions2Text')
                .in("t", flowchartPk.Transition)
                .filter{
                    //Only transform those transitions
                    //that satisfy the following condition
                    t.source.name == "Is it really too early?"

                }
                .out("p", htmlPk.P, {
                    p.value = "Node: ${t.source.name} --> Transition: ${t.name}".toString()
                })
        ])

    }
}