Exercise 6 - Implementation

Base Transformation

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

package flowchartToHtmlExamples

import static yamtl.dsl.Helper.*
import static yamtl.dsl.Rule.*

import org.eclipse.emf.ecore.EClass
import org.eclipse.emf.ecore.EPackage

import yamtl.core.YAMTLModule
import yamtl.groovy.YAMTLGroovyExtensions_dynamicEMF

class Example6 extends YAMTLModule {
    public int i = 1

    public Example6(EPackage flowchartPk, EPackage htmlPk) {
        YAMTLGroovyExtensions_dynamicEMF.init(this)

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

        ruleStore([
            rule('Action2Heading')
                    .in("a", flowchartPk.Action)
                    .out("h1", htmlPk.H1, {                 
                        h1.value = att.toString()
                    }),
            rule('Decision2Heading')
                    .in("d", flowchartPk.Decision)
                    .out("h1", htmlPk.H1, {
                        h1.value = op(['obj': d])
                    }),
            rule('Transition2Heading')
                    .in("t", flowchartPk.Transition)
                    .out("h1", htmlPk.H1, {
                        //TODO: Set value of h1 as the value returned from contextual operation

                    }) 
        ])

        helperStore([
            staticAttribute('att', {                
                def actionList = []
                for (anAction in allInstances(flowchartPk.Action)) {
                    actionList.add(anAction.name)
                }

                //returns all instances of Action elements from the source model
                return actionList
            }),
            staticOperation('op', { argsMap ->
                def aTransition = (flowchartPk.Transition as EClass)
                aTransition = argsMap.obj.outgoing

                //The name of the target node of the outgoing transition from 'd' Decision element
                return aTransition.target.name.toString()
            }),
            //TODO: Create a contextualOperation helper function that has 2 parameters




        ])

    }
}

Solution

The correct transformation definition for this problem is:

package flowchartToHtmlExamples

import static yamtl.dsl.Helper.*
import static yamtl.dsl.Rule.*

import org.eclipse.emf.ecore.EClass
import org.eclipse.emf.ecore.EPackage

import yamtl.core.YAMTLModule
import yamtl.groovy.YAMTLGroovyExtensions_dynamicEMF

class Example6 extends YAMTLModule {
    public int i = 1

    public Example6(EPackage flowchartPk, EPackage htmlPk) {
        YAMTLGroovyExtensions_dynamicEMF.init(this)

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

        ruleStore([
            rule('Action2Heading')
                    .in("a", flowchartPk.Action)
                    .out("h1", htmlPk.H1, {                 
                        h1.value = att.toString()
                    }),
            rule('Decision2Heading')
                    .in("d", flowchartPk.Decision)
                    .out("h1", htmlPk.H1, {
                        h1.value = op(['obj': d])
                    }),
            rule('Transition2Heading')
                    .in("t", flowchartPk.Transition)
                    .out("h1", htmlPk.H1, {
                        h1.value = c_op(t, ['prefix': "${i++}. "])
                    }) 
        ])

        helperStore([
            staticAttribute('att', {                
                def actionList = []
                for (anAction in allInstances(flowchartPk.Action)) {
                    actionList.add(anAction.name)
                }

                //returns all instances of Action elements from the source model
                return actionList
            }),
            staticOperation('op', { argsMap ->
                def aTransition = (flowchartPk.Transition as EClass)
                aTransition = argsMap.obj.outgoing

                //The name of the target node of the outgoing transition from 'd' Decision element
                return aTransition.target.name.toString()
            }),
            contextualOperation('c_op', { obj, argsMap ->
                //returns the name of the contextual instance 'obj' and argument 'suffix'
                return argsMap['prefix'].toString() + obj.name
            })
        ])

    }
}