Neo4j 4，OGM ClassCastException：[Lscala.collection.convert.Wrappers $ MapWrapper;无法强制转换为java.util.List

Question

我有以下Neo4j / Cypher / Spring Data Neo4j逻辑：

@Query("MATCH (parentD:Decision)-[:CONTAINS]->(childD:Decision) WHERE id(parentD) = {parentDecisionId} RETURN childD AS decision, [ (parentD)<-[:DEFINED_BY]-(c:Criterion)<-[:VOTED_ON]-(vg:VoteGroup)-[:VOTED_FOR]->(childD) | {criterion: c,  weight: vg.avgVotesWeight} ] AS weightedCriteria, [ (parentD)<-[:DEFINED_BY]-(ch:Characteristic)<-[:SET_ON]-(v:Value)-[:SET_FOR]->(childD) | {characteristic: ch,  value: v.value} ] AS valuedCharacteristics")
List<DecisionMatrix> findAllDecisionMatrixs(@Param("parentDecisionId") Long parentDecisionId);

因此，此SDN 4存储库方法检索DecisionMatrix：

的列表

@QueryResult
public class DecisionMatrix {

    private Decision decision;

    private List<WeightedCriterion> weightedCriteria;

    private List<ValuedCharacteristic> valuedCharacteristics;

}

到目前为止一切正常。

但由于条件复杂，我需要在代码中动态构造此查询，然后使用org.neo4j.ogm.session.Session执行：

Result queryResult = session.query(cypherQuery, parameters);

获得结果后，我必须将其转换为List<DecisionMatrix>

这是我的转换器：

    @SuppressWarnings("unchecked")
    public static List<DecisionMatrix> convertResultToDecisionMatrixs(Result queryResult) {
        List<DecisionMatrix> decisionMatrixs = new ArrayList<>();
        for (Map<String, Object> result : queryResult) {
            DecisionMatrix decisionMatrix = new DecisionMatrix();
            decisionMatrix.setDecision((Decision) result.get(DecisionQueryBuilder.DECISION_VARIABLE_BASE_NAME));
            Object weightedCriteria = result.get("weightedCriteria");
            if (weightedCriteria != null) {
                decisionMatrix.setWeightedCriteria((List<WeightedCriterion>) weightedCriteria);
            }
            Object valuedCharacteristics = result.get("valuedCharacteristics");
            if (valuedCharacteristics != null) {
                decisionMatrix.setValuedCharacteristics((List<ValuedCharacteristic>) valuedCharacteristics);
            }

            decisionMatrixs.add(decisionMatrix);
        }
        return decisionMatrixs;
    }

但它现在在以下行中失败：

decisionMatrix.setWeightedCriteria((List<WeightedCriterion>) weightedCriteria);

有以下例外：

java.lang.ClassCastException: [Lscala.collection.convert.Wrappers$MapWrapper; cannot be cast to java.util.List
    at com.example.domain.util.OGMUtils.convertResultToDecisionMatrixs(OGMUtils.java:43)

如何正确地将我的结果转换为List<DecisionMatrix>（如SDN 4存储库方法那样）？

已更新

我更新了我的转换器：

    @SuppressWarnings("unchecked")
    public static List<DecisionMatrix> convertResultToDecisionMatrixs(Result queryResult) {
        List<DecisionMatrix> decisionMatrixs = new ArrayList<>();
        for (Map<String, Object> result : queryResult) {
            DecisionMatrix decisionMatrix = new DecisionMatrix();
            decisionMatrix.setDecision((Decision) result.get(DecisionQueryBuilder.DECISION_VARIABLE_BASE_NAME));
            Object weightedCriteria = result.get("weightedCriteria");
            if (weightedCriteria != null) {
                List<WeightedCriterion> weightedCriterions = new LinkedList<>();
                MapWrapper<String, Object>[] weightedCriteriaArray = (MapWrapper<String, Object>[]) weightedCriteria;
                for (int i = 0; i < weightedCriteriaArray.length; i++) {
                    MapWrapper<String, Object> weightedCriteriaArrayElement = (MapWrapper<String, Object>) weightedCriteriaArray[i];
                    Double weight = (Double) weightedCriteriaArrayElement.get("weight");
                    Criterion criterion = (Criterion) weightedCriteriaArrayElement.get("criterion");
                    weightedCriterions.add(new WeightedCriterion(criterion, weight));
                }
                decisionMatrix.setWeightedCriteria(weightedCriterions);
            }
            Object valuedCharacteristics = result.get("valuedCharacteristics");
            if (valuedCharacteristics != null) {
                decisionMatrix.setValuedCharacteristics((List<ValuedCharacteristic>) valuedCharacteristics);
            }

            decisionMatrixs.add(decisionMatrix);
        }
        return decisionMatrixs;
    }

以下行没有失败：

Criterion criterion = (Criterion) weightedCriteriaArrayElement.get("criterion");

有以下例外：

java.lang.ClassCastException: org.neo4j.kernel.impl.core.NodeProxy cannot be cast to com.example.domain.model.entity.decision.Criterion

如何解决这个问题？是否有机会从SDN 4存储库方法内部重用某些逻辑以获得正确的结果？

例如，AFAIK之前我们使用过

neo4jOperations.convert(nodeProxy, Criterion.class); 

今天如何实现？