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Concourse is a self-tuning database that is designed for both ad hoc analytics and high volume transactions at scale. Developers use Concourse to quickly build mission critical software while also benefiting from real time insight into their most important data. With Concourse, end-to-end data management requires no extra infrastructure, no prior configuration and no additional coding–all of which greatly reduce costs and allow developers to focus on core business problems.

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/*
 * Copyright (c) 2013-2019 Cinchapi Inc.
 *
 * 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 com.cinchapi.concourse.lang;

import com.cinchapi.ccl.grammar.KeySymbol;

/**
 * The {@link StartState} marks the logical beginning of a new {@link Criteria}.
 * 
 * @author Jeff Nelson
 */
public class StartState extends State {

    /**
     * Construct a new instance.
     * 
     * @param criteria
     */
    public StartState(BuiltCriteria criteria) {
        super(criteria);
    }

    /**
     * Add a sub {@code criteria} to the Criteria that is building. A sub
     * criteria is one that is wrapped in parenthesis.
     * 
     * @param criteria
     * @return the builder
     */
    public BuildableStartState group(Criteria criteria) {
        this.criteria.add(criteria);
        return new BuildableStartState(this.criteria);
    }

    /**
     * Add a sub {@code criteria} to the Criteria that is building. A sub
     * criteria is one that is wrapped in parenthesis.
     * 
     * @param criteria
     * @return the builder
     */
    // CON-131: account for cases when the caller forgets to "build" the
    // sub criteria
    public BuildableStartState group(Object criteria) {
        if(criteria instanceof BuildableState) {
            return group(((BuildableState) criteria).build());
        }
        else {
            throw new IllegalArgumentException(
                    criteria + " is not a valid argument for the group method");
        }
    }

    /**
     * Add a {@code key} to the Criteria that is building.
     * 
     * @param key
     * @return the builder
     */
    public KeyState key(String key) {
        criteria.add(new KeySymbol(key));
        return new KeyState(criteria);
    }

}