/*
 * Reference ETL Parser for Java
 * Copyright (c) 2000-2009 Constantine A Plotnikov
 *
 * 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 net.sf.etl.parsers.internal.phrase_parser;

/**
 * In this state a sequence of segments is parsed
 * 
 * @author const
 */
public final class SegmentSequenceState extends ParsingState {
	/**
	 * if true, this sequence could end with "}" otherwise it is an error this
	 * variable is true only for top level segment sequence
	 */
	boolean closingCurlyAllowed = true;
	/**
	 * if true, the error about bad token has been already reported
	 */
	boolean errorReported = false;

	/**
	 * @param parser
	 *            owning parser
	 * @param cca
	 *            true if closing curly is allowed exit
	 */
	public SegmentSequenceState(DefaultPhraseParser parser, boolean cca) {
		super(parser);
		closingCurlyAllowed = cca;
	}

	/**
	 * @param parser
	 *            owning parser
	 */
	public SegmentSequenceState(DefaultPhraseParser parser) {
		super(parser);
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public boolean startParse() {
		return parseMore();
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public boolean parseMore() {
		if (skipIgnorable()) {
			return true;
		}
		switch (getLexer().current().kind()) {
		case CLOSE_CURLY:
			if (closingCurlyAllowed) {
				exit();
				return false;
			} else {
				if (errorReported) {
					this.controlToken();
					errorReported = false;
					return true;
				} else {
					errorReported = true;
					controlError("phrase.UnterminatedSegment", getLexer()
							.current().start());
					return true;
				}
			}
		case EOF:
			exit();
			return false;
		default:
			new SegmentState(parser);
			return false;
		}
	}
}