ceresdb-protocol/src/main/java/com/ceresdb/MetricParserFactory.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.ceresdb;

/**
 *
 * @author jiachun.fjc
 */
public interface MetricParserFactory {

    MetricParserFactory DEFAULT = new NoopFactory();

    MetricParser getParser(final String ql);

    class NoopFactory implements MetricParserFactory {

        @Override
        public MetricParser getParser(final String ql) {
            return MetricParser.DEFAULT;
        }
    }
}