| /* |
| * 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. * |
| */ |
| package org.apache.rat.header; |
| |
| import java.io.IOException; |
| import java.io.Reader; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| /** |
| * <p>Matches headers.</p> |
| * <p><strong>Usage:</strong></p> |
| * <ol> |
| * <li>{@link #read(Reader)} content</li> |
| * <li>{@link #matches(Pattern)} against filtered content</li> |
| * </ol> |
| * <p><strong>Note:</strong> use only from a single thread.</p> |
| * |
| */ |
| public class HeaderMatcher { |
| |
| private final FilteringSequenceFactory factory; |
| private final HeaderBean[] headers; |
| private CharSequence read; |
| private int lines; |
| |
| public HeaderMatcher(final CharFilter filter, final int capacity) { |
| this(filter, capacity, null); |
| } |
| |
| public HeaderMatcher(final CharFilter filter, final int capacity, final HeaderBean[] headers) { |
| factory = new FilteringSequenceFactory(capacity, filter); |
| read = null; |
| this.headers = headers; |
| } |
| |
| public void read(Reader reader) throws IOException { |
| final LineNumberReader lineNumberReader = new LineNumberReader(reader); |
| read = factory.filter(lineNumberReader); |
| if (lineNumberReader.read() == -1) { |
| lines = lineNumberReader.getLineNumber(); |
| } else { |
| lines = -1; |
| } |
| if (headers != null) { |
| for (final HeaderBean headerBean : headers) { |
| if (headerBean != null) { |
| final Pattern headerPattern = headerBean.getHeaderPattern(); |
| if (headerPattern != null) { |
| final boolean matches = matches(headerPattern); |
| headerBean.setMatch(matches); |
| } |
| } |
| } |
| } |
| } |
| |
| /** |
| * <p>Seeks a match in the last headers read.</p> |
| * <p><strong>Note</strong> that this pattern |
| * must not contain filtered characters. |
| * </p> |
| * @param pattern <code>Pattern</code> to match |
| * @return true if the pattern matches, |
| * false otherwise or if {@link #read(Reader)} has not been |
| * called |
| */ |
| public boolean matches(Pattern pattern) { |
| boolean result = false; |
| if (read != null) { |
| final Matcher matcher = pattern.matcher(read); |
| result = matcher.matches(); |
| } |
| return result; |
| } |
| |
| /** |
| * Number of lines read. |
| * @return the number of lines in the file |
| * or -1 if the file has more lines than were read |
| */ |
| public int lines() { |
| return lines; |
| } |
| } |