001/*-------------------------------------------------------------------------+
002|                                                                          |
003| Copyright 2005-2011 The ConQAT Project                                   |
004|                                                                          |
005| Licensed under the Apache License, Version 2.0 (the "License");          |
006| you may not use this file except in compliance with the License.         |
007| You may obtain a copy of the License at                                  |
008|                                                                          |
009|    http://www.apache.org/licenses/LICENSE-2.0                            |
010|                                                                          |
011| Unless required by applicable law or agreed to in writing, software      |
012| distributed under the License is distributed on an "AS IS" BASIS,        |
013| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
014| See the License for the specific language governing permissions and      |
015| limitations under the License.                                           |
016+-------------------------------------------------------------------------*/
017package eu.cqse.check.framework.scanner;
018
019import java.io.IOException;
020import java.io.Reader;
021
022import eu.cqse.check.framework.scanner.ETokenType.ETokenClass;
023
024/**
025 * Wrapps an {@link ILenientScanner} and converts tokens of
026 * {@link ETokenClass#ERROR} into {@link ScannerException}s.
027 */
028public class StrictScanner implements IScanner {
029
030        /** Underlying lenient scanner */
031        private final ILenientScanner scanner;
032
033        /**
034         * Constructor
035         * 
036         * @param scanner
037         *            wrapped {@link ILenientScanner}
038         */
039        public StrictScanner(ILenientScanner scanner) {
040                this.scanner = scanner;
041        }
042
043        /** {@inheritDoc} */
044        @Override
045        public IToken getNextToken() throws IOException, ScannerException {
046                IToken token = scanner.getNextToken();
047
048                if (token != null && token.getType().isError()) {
049                        throw new ScannerException(token.getType(), token.getText(), token.getLineNumber());
050                }
051
052                return token;
053        }
054
055        /** {@inheritDoc} */
056        @Override
057        public void close() throws IOException {
058                scanner.close();
059        }
060
061        /** {@inheritDoc} */
062        @Override
063        public void reset(Reader reader, String originId) {
064                scanner.reset(reader, originId);
065        }
066
067}