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 *  Copyright (c) 2014-2019 Appsicle
 *  Copyright (c) 2019-2024 QuestDB
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 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
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 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
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package io.questdb.griffin.engine.functions.test;

import io.questdb.cairo.CairoConfiguration;
import io.questdb.cairo.sql.Function;
import io.questdb.cairo.sql.Record;
import io.questdb.cairo.sql.SymbolTableSource;
import io.questdb.griffin.FunctionFactory;
import io.questdb.griffin.PlanSink;
import io.questdb.griffin.SqlException;
import io.questdb.griffin.SqlExecutionContext;
import io.questdb.griffin.engine.functions.BooleanFunction;
import io.questdb.griffin.engine.functions.constants.BooleanConstant;
import io.questdb.std.IntList;
import io.questdb.std.ObjList;

public class TestNPEFactory implements FunctionFactory {
    public static final String SIGNATURE = "npe()";

    @Override
    public String getSignature() {
        return SIGNATURE;
    }

    @Override
    public Function newInstance(
            int position,
            ObjList args,
            IntList argPositions,
            CairoConfiguration configuration,
            SqlExecutionContext sqlExecutionContext
    ) {
        if (configuration.isDevModeEnabled()) {
            return NPEFunction.INSTANCE;
        }
        return BooleanConstant.FALSE;
    }

    private static class NPEFunction extends BooleanFunction {
        private static final NPEFunction INSTANCE = new NPEFunction();

        @Override
        public boolean getBool(Record rec) {
            throw new NullPointerException();
        }

        @Override
        public void init(SymbolTableSource symbolTableSource, SqlExecutionContext executionContext) throws SqlException {
            executionContext.getSecurityContext().authorizeSystemAdmin();
            super.init(symbolTableSource, executionContext);
        }

        @Override
        public boolean isThreadSafe() {
            return true;
        }

        @Override
        public void toPlan(PlanSink sink) {
            sink.val(SIGNATURE);
        }
    }
}