| package org.apache.rat.analysis; |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one * |
| * or more contributor license agreements. See the NOTICE file * |
| * distributed with this work for additional information * |
| * regarding copyright ownership. The ASF licenses this file * |
| * to you 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. * |
| */ |
| |
| import org.apache.commons.io.IOUtils; |
| import org.apache.rat.api.Document; |
| import org.apache.rat.api.MetaData; |
| |
| import java.io.BufferedReader; |
| import java.io.IOException; |
| import java.io.Reader; |
| |
| /** |
| * <p>Reads from a stream to check license.</p> |
| * <p><strong>Note</strong> that this class is not thread safe.</p> |
| */ |
| class HeaderCheckWorker { |
| |
| public static final int DEFAULT_NUMBER_OF_RETAINED_HEADER_LINES = 50; |
| |
| private final int numberOfRetainedHeaderLines; |
| private final BufferedReader reader; |
| private final IHeaderMatcher matcher; |
| private final Document subject; |
| |
| private boolean match = false; |
| |
| private int headerLinesToRead; |
| private boolean finished = false; |
| |
| public HeaderCheckWorker(Reader reader, int numberOfRetainedHeaderLine, |
| final IHeaderMatcher matcher, final Document name) { |
| this(new BufferedReader(reader), numberOfRetainedHeaderLine, matcher, name); |
| } |
| |
| |
| /** |
| * Convenience constructor wraps given <code>Reader</code> |
| * in a <code>BufferedReader</code>. |
| * @param reader a <code>Reader</code> for the content, not null |
| * @param name the name of the checked content, possibly null |
| */ |
| public HeaderCheckWorker(Reader reader, final IHeaderMatcher matcher, final Document name) { |
| this(new BufferedReader(reader), matcher, name); |
| } |
| |
| public HeaderCheckWorker(BufferedReader reader, final IHeaderMatcher matcher, |
| final Document name) { |
| this(reader, DEFAULT_NUMBER_OF_RETAINED_HEADER_LINES, matcher, name); |
| } |
| |
| public HeaderCheckWorker(BufferedReader reader, int numberOfRetainedHeaderLine, final IHeaderMatcher matcher, |
| final Document name) { |
| this.reader = reader; |
| this.numberOfRetainedHeaderLines = numberOfRetainedHeaderLine; |
| this.matcher = matcher; |
| this.subject = name; |
| } |
| |
| public boolean isFinished() { |
| return finished; |
| } |
| |
| public void read() throws RatHeaderAnalysisException { |
| if (!finished) { |
| final StringBuilder headers = new StringBuilder(); |
| headerLinesToRead = numberOfRetainedHeaderLines; |
| try { |
| while(readLine(headers)) { |
| // do nothing |
| } |
| if (!match) { |
| final String notes = headers.toString(); |
| final MetaData metaData = subject.getMetaData(); |
| metaData.set(new MetaData.Datum(MetaData.RAT_URL_HEADER_SAMPLE, notes)); |
| metaData.set(new MetaData.Datum(MetaData.RAT_URL_HEADER_CATEGORY, MetaData.RAT_LICENSE_FAMILY_CATEGORY_VALUE_UNKNOWN)); |
| metaData.set(MetaData.RAT_LICENSE_FAMILY_NAME_DATUM_UNKNOWN); |
| } |
| } catch (IOException e) { |
| throw new RatHeaderAnalysisException("Cannot read header for " + subject, e); |
| } |
| IOUtils.closeQuietly(reader); |
| matcher.reset(); |
| } |
| finished = true; |
| } |
| |
| boolean readLine(StringBuilder headers) throws IOException, RatHeaderAnalysisException { |
| String line = reader.readLine(); |
| boolean result = line != null; |
| if (result) { |
| if (headerLinesToRead-- > 0) { |
| headers.append(line); |
| headers.append('\n'); |
| } |
| match = matcher.match(subject, line); |
| result = !match; |
| } |
| return result; |
| } |
| } |