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This is the api to interact with Concourse, a schemaless and distributed version control database with optimistic availability, serializable transactions and full-text search. Concourse provides a more intuitive approach to data management that is easy to deploy, access and scale with minimal tuning while also maintaining the referential integrity and ACID characteristics of traditional database systems.

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/*
 * The MIT License (MIT)
 * 
 * Copyright (c) 2014 Jeff Nelson, Cinchapi Software Collective
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package org.cinchapi.concourse.lang;

import java.text.MessageFormat;

/**
 * A {@link Symbol} that represents either an open or close parenthesis in a
 * {@link Criteria}.
 * 
 * @author jnelson
 */
enum ParenthesisSymbol implements Symbol {
    LEFT, RIGHT;

    /**
     * Return the {@link ParenthesisSymbol} that is parsed from {@code string}.
     * 
     * @param string
     * @return the symbol
     */
    public static ParenthesisSymbol parse(String string) {
        if(string.equalsIgnoreCase("(") || string.equalsIgnoreCase(LEFT.name())) {
            return LEFT;
        }
        else if(string.equalsIgnoreCase(")")
                || string.equalsIgnoreCase(RIGHT.name())) {
            return RIGHT;
        }
        throw new RuntimeException(MessageFormat.format(
                "Cannot parse {0} into a ParenthesisSymbol", string));
    }

    @Override
    public String toString() {
        return this == LEFT ? "(" : ")";
    }
}