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'databene commons' is an open source Java library by Volker Bergmann. It provides extensions to the Java core library by utility classes, abstract concepts and concrete implementations.

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/*
 * Copyright (C) 2004-2015 Volker Bergmann ([email protected]).
 * 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 org.databene.commons;

import java.text.ParsePosition;

/**
 * Parent for classes which parse {@link String}. 
 * It resembles the 'parse' part of the {@link java.text.Format} class.
 * Created: 10.03.2011 15:36:54
 * @param  the result type of the parser
 * @since 0.5.8
 * @author Volker Bergmann
 */
public abstract class Parser {
	
	public E parse(String text) {
		ParsePosition pos = new ParsePosition(0);
		E result = parseObject(text, pos);
		if (pos.getIndex() < text.length())
			throw new ParseException("Illegal syntax", text, -1, pos.getIndex());
		return result;
	}

	public abstract E parseObject(String text, ParsePosition pos);
	
}