Unsupported Cypher Map Projections expression with translation library #360
Description
Here is the Pom file:
<dependency>
<groupId>org.opencypher.gremlin</groupId>
<artifactId>translation</artifactId>
<version>1.0.4</version>
</dependency>
Source code:
import org.opencypher.gremlin.translation.CypherAst
import org.opencypher.gremlin.translation.translator.Translator
import org.opencypher.gremlin.translation.translator.TranslatorFlavor
fun main() {
val cypher = """
MATCH (decks:Deck)
WHERE decks.externalId = 'abcd'
RETURN decks {
.tokenizedName
} AS decks
"""
val ast = CypherAst.parse(cypher)
val translator = Translator.builder()
.gremlinGroovy()
.inlineParameters()
.enableMultipleLabels()
.build(TranslatorFlavor.neptune())
val gremlin = ast.buildTranslation(translator)
System.out.println(gremlin)
}
Produces following exception :
Exception in thread "main" java.lang.UnsupportedOperationException: Unsupported value expression: DesugaredMapProjection(Variable(decks),List(LiteralEntry(PropertyKeyName(tokenizedName),Property(Variable(decks),PropertyKeyName(tokenizedName)))),false)
at org.opencypher.gremlin.translation.context.WalkerContext.unsupported(WalkerContext.scala:69)
at org.opencypher.gremlin.translation.walker.NodeUtils$.traversalValueToJava(NodeUtils.scala:51)
at org.opencypher.gremlin.translation.walker.NodeUtils$.expressionValue(NodeUtils.scala:35)
at org.opencypher.gremlin.translation.walker.ExpressionWalker.org$opencypher$gremlin$translation$walker$ExpressionWalker$$walkLocal(ExpressionWalker.scala:326)
at org.opencypher.gremlin.translation.walker.ExpressionWalker$.walkLocal(ExpressionWalker.scala:49)
at org.opencypher.gremlin.translation.walker.ProjectionWalker.walkLocal(ProjectionWalker.scala:411)
at org.opencypher.gremlin.translation.walker.ProjectionWalker.subTraversal(ProjectionWalker.scala:279)
at org.opencypher.gremlin.translation.walker.ProjectionWalker.$anonfun$returnSubTraversals$1(ProjectionWalker.scala:119)
at scala.collection.Iterator.foreach(Iterator.scala:937)
at scala.collection.Iterator.foreach$(Iterator.scala:937)
at scala.collection.AbstractIterator.foreach(Iterator.scala:1425)
at scala.collection.IterableLike.foreach(IterableLike.scala:70)
at scala.collection.IterableLike.foreach$(IterableLike.scala:69)
at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
at org.opencypher.gremlin.translation.walker.ProjectionWalker.returnSubTraversals(ProjectionWalker.scala:116)
at org.opencypher.gremlin.translation.walker.ProjectionWalker.walk(ProjectionWalker.scala:75)
at org.opencypher.gremlin.translation.walker.ProjectionWalker.walkFinal(ProjectionWalker.scala:101)
at org.opencypher.gremlin.translation.walker.ProjectionWalker$.walk(ProjectionWalker.scala:44)
at org.opencypher.gremlin.translation.walker.StatementWalker.walkClause(StatementWalker.scala:125)
at org.opencypher.gremlin.translation.walker.StatementWalker.$anonfun$walkSingle$1(StatementWalker.scala:84)
at org.opencypher.gremlin.translation.walker.StatementWalker.$anonfun$walkSingle$1$adapted(StatementWalker.scala:84)
at scala.collection.immutable.List.foreach(List.scala:388)
at org.opencypher.gremlin.translation.walker.StatementWalker.walkSingle(StatementWalker.scala:84)
at org.opencypher.gremlin.translation.walker.StatementWalker.walk(StatementWalker.scala:45)
at org.opencypher.gremlin.translation.walker.StatementWalker$.walk(StatementWalker.scala:32)
at org.opencypher.gremlin.translation.CypherAst.translate(CypherAst.scala:98)
at org.opencypher.gremlin.translation.CypherAst.buildTranslation(CypherAst.scala:119)
at org.neo4j.graphql.examples.dgsspringboot.datafetcher.CypherToGremlinKt.main(CypherToGremlin.kt:24)
at org.neo4j.graphql.examples.dgsspringboot.datafetcher.CypherToGremlinKt.main(CypherToGremlin.kt)
Am i missing something here? Please help.