Exercise 4 - 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 Example4 extends YAMTLModule {
    public Example4(EPackage flowchartPk, EPackage htmlPk) {
        YAMTLGroovyExtensions_dynamicEMF.init(this)

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

        ruleStore([
            rule('Node2TableRows')
                .in("n", flowchartPk.Node)
                .out("name", htmlPk.TD, {
                    name.value = n.name 
                })
                .out("from", htmlPk.TD, {
                    from.value = n.incoming.name.toString()
                })
                .out("to", htmlPk.TD, { 
                    to.value = n.outgoing.name.toString()
                })
                .out("tr", htmlPk.TR, {
                    //TODO: Add name object to 1st column

                    //TODO: Add from object to 2nd column

                    //TODO: Add to object to 3rd column

                }),
            rule('Flowchart2Table')
                .in("f", flowchartPk.Flowchart)
                .out("headingName", htmlPk.TH, {
                    headingName.value = "Node"
                })
                .out("headingIncoming", htmlPk.TH, {
                    headingIncoming.value = "Incoming Transition(s)"
                })
                .out("headingOutgoing", htmlPk.TH, {
                    headingOutgoing.value = "Outgoing Transition(s)"
                })
                .out("headingRow", htmlPk.TR, {
                    //TODO: Add headingName object to 1st column

                    //TODO: Add headingIncoming object to 2nd column

                    //TODO: Add headingOutgoing object to 3rd column

                })
                .out("table", htmlPk.TABLE, {
                    //TODO: Add heading row

                    //TODO: Add all table rows using fetch operation

                })
        ]) 
    }
}

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 Example4 extends YAMTLModule {
    public Example4(EPackage flowchartPk, EPackage htmlPk) {
        YAMTLGroovyExtensions_dynamicEMF.init(this)

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

        ruleStore([
            rule('Node2TableRows')
                .in("n", flowchartPk.Node)
                .out("name", htmlPk.TD, {
                    name.value = n.name 
                })
                .out("from", htmlPk.TD, {
                    from.value = n.incoming.name.toString()
                })
                .out("to", htmlPk.TD, { 
                    to.value = n.outgoing.name.toString()
                })
                .out("tr", htmlPk.TR, {
                    //Add name object to 1st column
                    tr.tds.add(name)
                    //Add from object to 2nd column
                    tr.tds.add(from)
                    //Add to object to 3rd column
                    tr.tds.add(to)
                }),
            rule('Flowchart2Table')
                .in("f", flowchartPk.Flowchart)
                .out("headingName", htmlPk.TH, {
                    headingName.value = "Node"
                })
                .out("headingIncoming", htmlPk.TH, {
                    headingIncoming.value = "Incoming Transition(s)"
                })
                .out("headingOutgoing", htmlPk.TH, {
                    headingOutgoing.value = "Outgoing Transition(s)"
                })
                .out("headingRow", htmlPk.TR, {
                    //Add headingName object to 1st column
                    headingRow.tds.add(headingName)
                    //Add headingIncoming object to 2nd column
                    headingRow.tds.add(headingIncoming)
                    //Add headingOutgoing object to 3rd column
                    headingRow.tds.add(headingOutgoing)
                })
                .out("table", htmlPk.TABLE, {
                    //Add heading row
                    table.trs.add(headingRow)
                    //Add all table rows using fetch operation
                    table.trs.addAll(fetch(f.nodes, "tr"))
                })
        ]) 
    }
}