io.questdb.griffin.engine.functions.bool.AllNotEqStrFunctionFactory Maven / Gradle / Ivy

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 *  Copyright (c) 2014-2019 Appsicle
 *  Copyright (c) 2019-2020 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.bool;

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

public class AllNotEqStrFunctionFactory implements FunctionFactory {

    @Override
    public String getSignature() {
        return "<>all(Ss[])";
    }

    @Override
    public Function newInstance(ObjList args, int position, CairoConfiguration configuration, SqlExecutionContext sqlExecutionContext) {
        Function arrayFunction = args.getQuick(1);
        int arraySize = arrayFunction.getArrayLength();
        if (arraySize == 0) {
            return new BooleanConstant(position, true);
        }

        CharSequenceHashSet set = new CharSequenceHashSet();
        for (int i = 0; i < arraySize; i++) {
            set.add(arrayFunction.getStr(null, i));
        }

        Function var = args.getQuick(0);
        if (var.isConstant()) {
            CharSequence str = var.getStr(null);
            return new BooleanConstant(position, str != null && set.excludes(str));
        }

        return new AllNotEqualStrFunction(position, var, set);
    }

    private static class AllNotEqualStrFunction extends BooleanFunction implements UnaryFunction {
        private final Function arg;
        private final CharSequenceHashSet set;

        private AllNotEqualStrFunction(int position, Function arg, CharSequenceHashSet set) {
            super(position);
            this.arg = arg;
            this.set = set;
        }

        @Override
        public Function getArg() {
            return arg;
        }

        @Override
        public boolean getBool(Record rec) {
            CharSequence str = arg.getStr(rec);
            return str != null && set.excludes(str);
        }
    }
}