plugins/org.eclipse.dltk.ruby.core/jruby/org/jruby/lexer/yacc/SourcePositionFactory.java

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 * License Version 1.0 (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.eclipse.org/legal/cpl-v10.html
 *
 * Software distributed under the License is distributed on an "AS
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 * implied. See the License for the specific language governing
 * rights and limitations under the License.
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 * Copyright (C) 2005 Thomas E Enebo <enebo@acm.org>
 * 
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 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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 package org.jruby.lexer.yacc;

public class SourcePositionFactory implements ISourcePositionFactory {
    // Position of last token returned.
    private SourcePosition lastPosition = new SourcePosition();
    private LexerSource source;
    
    public SourcePositionFactory(LexerSource source) {
        this.source = source;
    }

    public ISourcePosition getPosition(ISourcePosition startPosition, boolean inclusive) {

        if (startPosition == null) {
            lastPosition = new SourcePosition(source.getFilename(), lastPosition.getEndLine(), 
                    source.getLine(), lastPosition.getEndOffset(), source.getOffset());
        } else if (inclusive) {
            lastPosition = new SourcePosition(source.getFilename(), startPosition.getStartLine(), 
                    source.getLine(), startPosition.getStartOffset(), source.getOffset());
        } else {
            lastPosition = new SourcePosition(source.getFilename(), startPosition.getEndLine(), 
                    source.getLine(), startPosition.getEndOffset(), source.getOffset());
        }

        return lastPosition;
	}
    
    public ISourcePosition getDummyPosition() {
        return new SourcePosition("", -1, -1, 0, 0);
    }
}