io.questdb.griffin.engine.functions.str.ConcatFunctionFactory Maven / Gradle / Ivy

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

import io.questdb.cairo.CairoConfiguration;
import io.questdb.cairo.ColumnType;
import io.questdb.cairo.sql.Function;
import io.questdb.cairo.sql.Record;
import io.questdb.griffin.FunctionFactory;
import io.questdb.griffin.SqlExecutionContext;
import io.questdb.griffin.engine.functions.MultiArgFunction;
import io.questdb.griffin.engine.functions.StrFunction;
import io.questdb.std.ObjList;
import io.questdb.std.Transient;
import io.questdb.std.str.CharSink;
import io.questdb.std.str.StringSink;

public class ConcatFunctionFactory implements FunctionFactory {
    private static final ObjList adapterReferences = new ObjList<>();

    static {
        adapterReferences.extendAndSet(ColumnType.LONG256, ConcatFunctionFactory::sinkLong256);
        adapterReferences.extendAndSet(ColumnType.BOOLEAN, ConcatFunctionFactory::sinkBool);
        adapterReferences.extendAndSet(ColumnType.BYTE, ConcatFunctionFactory::sinkByte);
        adapterReferences.extendAndSet(ColumnType.SHORT, ConcatFunctionFactory::sinkShort);
        adapterReferences.extendAndSet(ColumnType.CHAR, ConcatFunctionFactory::sinkChar);
        adapterReferences.extendAndSet(ColumnType.INT, ConcatFunctionFactory::sinkInt);
        adapterReferences.extendAndSet(ColumnType.LONG, ConcatFunctionFactory::sinkLong);
        adapterReferences.extendAndSet(ColumnType.FLOAT, ConcatFunctionFactory::sinkFloat);
        adapterReferences.extendAndSet(ColumnType.DOUBLE, ConcatFunctionFactory::sinkDouble);
        adapterReferences.extendAndSet(ColumnType.STRING, ConcatFunctionFactory::sinkStr);
        adapterReferences.extendAndSet(ColumnType.SYMBOL, ConcatFunctionFactory::sinkSymbol);
        adapterReferences.extendAndSet(ColumnType.BINARY, ConcatFunctionFactory::sinkBin);
        adapterReferences.extendAndSet(ColumnType.DATE, ConcatFunctionFactory::sinkDate);
        adapterReferences.extendAndSet(ColumnType.TIMESTAMP, ConcatFunctionFactory::sinkTimestamp);
    }

    private static void sinkLong(CharSink sink, Function function, Record record) {
        sink.put(function.getLong(record));
    }

    private static void sinkByte(CharSink sink, Function function, Record record) {
        sink.put(function.getByte(record));
    }

    private static void sinkShort(CharSink sink, Function function, Record record) {
        sink.put(function.getShort(record));
    }

    private static void sinkChar(CharSink sink, Function function, Record record) {
        sink.put(function.getChar(record));
    }

    private static void sinkInt(CharSink sink, Function function, Record record) {
        sink.put(function.getInt(record));
    }

    private static void sinkFloat(CharSink sink, Function function, Record record) {
        sink.put(function.getFloat(record), 3);
    }

    private static void sinkDouble(CharSink sink, Function function, Record record) {
        sink.put(function.getDouble(record));
    }

    private static void sinkSymbol(CharSink sink, Function function, Record record) {
        sink.put(function.getSymbol(record));
    }

    private static void sinkBool(CharSink sink, Function function, Record record) {
        sink.put(function.getBool(record));
    }

    private static void sinkDate(CharSink sink, Function function, Record record) {
        sink.put(function.getDate(record));
    }

    private static void sinkTimestamp(CharSink sink, Function function, Record record) {
        sink.put(function.getTimestamp(record));
    }

    private static void sinkLong256(CharSink sink, Function function, Record record) {
        function.getLong256(record, sink);
    }

    private static void sinkBin(CharSink sink, Function function, Record record) {
        sink.put('[');
        sink.put(']');
    }

    private static void sinkStr(CharSink sink, Function function, Record record) {
        function.getStr(record, sink);
    }

    @Override
    public String getSignature() {
        return "concat(V)";
    }

    @Override
    public Function newInstance(@Transient ObjList args, int position, CairoConfiguration configuration, SqlExecutionContext sqlExecutionContext) {
        final ObjList functions = new ObjList<>(args.size());
        functions.addAll(args);
        return new ConcatFunction(position, functions);
    }

    @FunctionalInterface
    private interface TypeAdapter {
        void sink(CharSink sink, Function function, Record record);
    }

    private static class ConcatFunction extends StrFunction implements MultiArgFunction {
        private final ObjList functions;
        private final ObjList adaptors;
        private final StringSink sinkA = new StringSink();
        private final StringSink sinkB = new StringSink();
        private final int functionCount;

        public ConcatFunction(int position, ObjList functions) {
            super(position);
            this.functions = functions;
            this.functionCount = functions.size();
            this.adaptors = new ObjList<>(functionCount);
            for (int i = 0; i < functionCount; i++) {
                adaptors.add(adapterReferences.getQuick(functions.getQuick(i).getType()));
            }
        }

        @Override
        public CharSequence getStr(Record rec) {
            sinkA.clear();
            getStr(rec, sinkA);
            return sinkA;
        }

        @Override
        public CharSequence getStrB(Record rec) {
            sinkB.clear();
            getStr(rec, sinkB);
            return sinkB;
        }

        @Override
        public void getStr(Record rec, CharSink sink) {
            for (int i = 0; i < functionCount; i++) {
                adaptors.getQuick(i).sink(sink, functions.getQuick(i), rec);
            }
        }

        @Override
        public ObjList getArgs() {
            return functions;
        }
    }
}