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

Go to download
Show more of this group Show more artifacts with this name
Show all versions of questdb Show documentation
QuestDB is high performance SQL time series database
There is a newer version: 8.2.1
/*******************************************************************************
 *     ___                  _   ____  ____
 *    / _ \ _   _  ___  ___| |_|  _ \| __ )
 *   | | | | | | |/ _ \/ __| __| | | |  _ \
 *   | |_| | |_| |  __/\__ \ |_| |_| | |_) |
 *    \__\_\\__,_|\___||___/\__|____/|____/
 *
 *  Copyright (c) 2014-2019 Appsicle
 *  Copyright (c) 2019-2024 QuestDB
 *
 *  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
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 ******************************************************************************/

package io.questdb.griffin.engine.functions.str;

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.SqlExecutionContext;
import io.questdb.griffin.engine.functions.StrFunction;
import io.questdb.griffin.engine.functions.UnaryFunction;
import io.questdb.std.Chars;
import io.questdb.std.IntList;
import io.questdb.std.ObjList;
import io.questdb.std.str.StringSink;

public class ToUppercaseFunctionFactory implements FunctionFactory {
    @Override
    public String getSignature() {
        return "to_uppercase(S)";
    }

    @Override
    public Function newInstance(
            int position,
            ObjList args,
            IntList argPositions,
            CairoConfiguration configuration,
            SqlExecutionContext sqlExecutionContext
    ) {
        return new ToUppercaseFunc(args.get(0));
    }

    private static class ToUppercaseFunc extends StrFunction implements UnaryFunction {
        private final Function arg;
        private final StringSink sinkA = new StringSink();
        private final StringSink sinkB = new StringSink();

        public ToUppercaseFunc(final Function arg) {
            this.arg = arg;
        }

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

        @Override
        public String getName() {
            return "to_uppercase";
        }

        @Override
        public CharSequence getStrA(final Record rec) {
            CharSequence str = getArg().getStrA(rec);
            if (str == null) {
                return null;
            }
            sinkA.clear();
            Chars.toUpperCase(str, sinkA);
            return sinkA;
        }

        @Override
        public CharSequence getStrB(final Record rec) {
            CharSequence str = getArg().getStrA(rec);
            if (str == null) {
                return null;
            }
            sinkB.clear();
            Chars.toUpperCase(str, sinkB);
            return sinkB;
        }

        @Override
        public int getStrLen(final Record rec) {
            return arg.getStrLen(rec);
        }

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