Examples with PatternPartMatchConstraint org.vertexium.cypher.executor.models.match.PatternPartMatchConstraint used on opensource projects

Example 1 with PatternPartMatchConstraint

use of org.vertexium.cypher.executor.models.match.PatternPartMatchConstraint in project vertexium by visallo.

the class MergeClauseExecutor method execute.

public VertexiumCypherScope execute(VertexiumCypherQueryContext ctx, CypherMergeClause clause, VertexiumCypherScope scope) {
    LOGGER.debug("execute: %s", clause);
    // need to materialize the scope
    scope.run();
    PatternPartMatchConstraint patternPartConstraint = new MatchConstraintBuilder().patternPartToConstraints(clause.getPatternPart(), false);
    Stream<VertexiumCypherScope> results = scope.stream().map(item -> {
        Stream<VertexiumCypherScope.Item> patternPartResults = ctx.getMatchClauseExecutor().executePatternPartConstraint(ctx, patternPartConstraint, item);
        return StreamUtils.ifEmpty(patternPartResults, () -> {
            Stream<VertexiumCypherScope.Item> createResults = executeCreate(ctx, clause, patternPartConstraint, item);
            return VertexiumCypherScope.newItemsScope(createResults, scope);
        }, (stream) -> executeMatch(ctx, clause, stream, scope));
    });
    return results.collect(VertexiumCypherScope.concatStreams(scope));
}