Examples with PlanGenException edu.uci.ics.textdb.api.exception.PlanGenException used on opensource projects

Example 1 with PlanGenException

use of edu.uci.ics.textdb.api.exception.PlanGenException in project textdb by TextDB.

the class LogicalPlan method findSinkOperator.

/*
     * Finds the sink operator in the operator graph.
     * 
     * This function assumes that the graph is valid and there is only one sink in the graph.
     */
private ISink findSinkOperator(HashMap<String, IOperator> operatorObjectMap) throws PlanGenException {
    IOperator sinkOperator = adjacencyList.keySet().stream().filter(operator -> operatorPredicateMap.get(operator).getClass().toString().toLowerCase().contains("sink")).map(operator -> operatorObjectMap.get(operator)).findFirst().orElse(null);
    PlanGenUtils.planGenAssert(sinkOperator != null, "Error: sink operator doesn't exist.");
    PlanGenUtils.planGenAssert(sinkOperator instanceof ISink, "Error: sink operator's type doesn't match.");
    return (ISink) sinkOperator;
}