io.deephaven.engine.table.impl.select.FormulaParserConfiguration Maven / Gradle / Ivy

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/**
 * Copyright (c) 2016-2022 Deephaven Data Labs and Patent Pending
 */
package io.deephaven.engine.table.impl.select;

import io.deephaven.base.Pair;
import io.deephaven.configuration.Configuration;

public enum FormulaParserConfiguration {
    Deephaven(), Numba();

    public static final String OBFUSCATED_PARSER_ANNOTATION = "";

    public static FormulaParserConfiguration parser = FormulaParserConfiguration
            .valueOf(Configuration.getInstance().getStringWithDefault("default.parser", Deephaven.name()));

    public static void setParser(FormulaParserConfiguration parser) {
        FormulaParserConfiguration.parser = parser;
    }

    public static Pair extractParserAndExpression(String expression) {
        if (expression.startsWith(FormulaParserConfiguration.OBFUSCATED_PARSER_ANNOTATION)) {
            expression = expression.substring(OBFUSCATED_PARSER_ANNOTATION.length());
            int endOfTag = expression.indexOf(':');
            FormulaParserConfiguration parserConfig =
                    FormulaParserConfiguration.valueOf(expression.substring(0, endOfTag));
            return new Pair<>(parserConfig, expression.substring(endOfTag + 1));
        }

        return new Pair<>(parser, expression);
    }

    public static String nb(String expression) {
        return new StringBuilder().append(OBFUSCATED_PARSER_ANNOTATION).append(Numba.name()).append(":")
                .append(expression).toString();
    }

    public static String dh(String expression) {
        return new StringBuilder().append(OBFUSCATED_PARSER_ANNOTATION).append(Deephaven.name()).append(":")
                .append(expression).toString();
    }

}