/*
* Copyright (c) 2008-2017, Hazelcast, Inc. All Rights Reserved.
*
* 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.hazelcast.query.extractor;
/**
* Common superclass for all argument parsers.
* <p/>
* For now, it's not possible to register a custom {@link ArgumentParser}, thus a default parser is used.
* It follows a "pass-through" semantics, which means that the string located in the square-brackets is passed
* "as-is" to the extract method.
* <p/>
* <b>It is not allowed to use square brackets within the argument string.</b>
*
* @param <I> type of the unparsed argument object (input)
* @param <O> type of the parsed argument object (output)
*/
public abstract class ArgumentParser<I, O> {
/**
* This method takes the unparsed argument object as an input and returns
* the parsed output that will be used by the {@link ValueExtractor}.
*
* @param input extraction argument in the specified format
* @return parsed argument object that will be passed to the {@link ValueExtractor}
*/
public abstract O parse(I input);
}