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package org.apache.lucene.benchmark.byTask.feeds;
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.io.Reader;
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import java.text.DateFormat;
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import java.text.ParsePosition;
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import java.text.SimpleDateFormat;
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import java.util.ArrayList;
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import java.util.Date;
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import java.util.Locale;
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import org.apache.lucene.benchmark.byTask.feeds.TrecDocParser.ParsePathType;
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import org.apache.lucene.benchmark.byTask.utils.Config;
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import org.apache.lucene.benchmark.byTask.utils.StreamUtils;
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import org.apache.lucene.benchmark.byTask.utils.StringBuilderReader;
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import org.apache.lucene.util.ThreadInterruptedException;
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* Implements a {@link ContentSource} over the TREC collection.
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* Supports the following configuration parameters (on top of
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* {@link ContentSource}):
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* <li><b>work.dir</b> - specifies the working directory. Required if "docs.dir"
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* denotes a relative path (<b>default=work</b>).
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* <li><b>docs.dir</b> - specifies the directory where the TREC files reside.
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* Can be set to a relative path if "work.dir" is also specified
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* (<b>default=trec</b>).
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* <li><b>trec.doc.parser</b> - specifies the {@link TrecDocParser} class to use for
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* parsing the TREC documents content (<b>default=TrecGov2Parser</b>).
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* <li><b>html.parser</b> - specifies the {@link HTMLParser} class to use for
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* parsing the HTML parts of the TREC documents content (<b>default=DemoHTMLParser</b>).
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* <li><b>content.source.encoding</b> - if not specified, ISO-8859-1 is used.
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* <li><b>content.source.excludeIteration</b> - if true, do not append iteration number to docname
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public class TrecContentSource extends ContentSource {
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private static final class DateFormatInfo {
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public static final String DOCNO = "<DOCNO>";
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public static final String TERMINATING_DOCNO = "</DOCNO>";
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public static final String DOC = "<DOC>";
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public static final String TERMINATING_DOC = "</DOC>";
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/** separator between lines in the byffer */
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public static final String NEW_LINE = System.getProperty("line.separator");
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private static final String DATE_FORMATS [] = {
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"EEE, dd MMM yyyy kk:mm:ss z", // Tue, 09 Dec 2003 22:39:08 GMT
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"EEE MMM dd kk:mm:ss yyyy z", // Tue Dec 09 16:45:08 2003 EST
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"EEE, dd-MMM-':'y kk:mm:ss z", // Tue, 09 Dec 2003 22:39:08 GMT
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"EEE, dd-MMM-yyy kk:mm:ss z", // Tue, 09 Dec 2003 22:39:08 GMT
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"EEE MMM dd kk:mm:ss yyyy", // Tue Dec 09 16:45:08 2003
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"dd MMM yyyy", // 1 March 1994
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"MMM dd, yyyy", // February 3, 1994
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"hhmm z.z.z. MMM dd, yyyy", // 0901 u.t.c. April 28, 1994
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private ThreadLocal<DateFormatInfo> dateFormats = new ThreadLocal<DateFormatInfo>();
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private ThreadLocal<StringBuilderReader> trecDocReader = new ThreadLocal<StringBuilderReader>();
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private ThreadLocal<StringBuilder> trecDocBuffer = new ThreadLocal<StringBuilder>();
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private File dataDir = null;
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private ArrayList<File> inputFiles = new ArrayList<File>();
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private int nextFile = 0;
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private int rawDocSize = 0;
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// Use to synchronize threads on reading from the TREC documents.
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private Object lock = new Object();
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BufferedReader reader;
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HTMLParser htmlParser;
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private boolean excludeDocnameIteration;
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private TrecDocParser trecDocParser = new TrecGov2Parser(); // default
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ParsePathType currPathType; // not private for tests
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private DateFormatInfo getDateFormatInfo() {
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DateFormatInfo dfi = dateFormats.get();
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dfi = new DateFormatInfo();
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dfi.dfs = new SimpleDateFormat[DATE_FORMATS.length];
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for (int i = 0; i < dfi.dfs.length; i++) {
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dfi.dfs[i] = new SimpleDateFormat(DATE_FORMATS[i], Locale.US);
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dfi.dfs[i].setLenient(true);
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dfi.pos = new ParsePosition(0);
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dateFormats.set(dfi);
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private StringBuilder getDocBuffer() {
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StringBuilder sb = trecDocBuffer.get();
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sb = new StringBuilder();
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trecDocBuffer.set(sb);
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Reader getTrecDocReader(StringBuilder docBuffer) {
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StringBuilderReader r = trecDocReader.get();
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r = new StringBuilderReader(docBuffer);
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trecDocReader.set(r);
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HTMLParser getHtmlParser() {
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* Read until a line starting with the specified <code>lineStart</code>.
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* @param buf buffer for collecting the data if so specified/
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* @param lineStart line start to look for, must not be null.
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* @param collectMatchLine whether to collect the matching line into <code>buffer</code>.
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* @param collectAll whether to collect all lines into <code>buffer</code>.
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* @throws IOException
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* @throws NoMoreDataException
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private void read(StringBuilder buf, String lineStart,
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boolean collectMatchLine, boolean collectAll) throws IOException, NoMoreDataException {
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String line = reader.readLine();
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rawDocSize += line.length();
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if (lineStart!=null && line.startsWith(lineStart)) {
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if (collectMatchLine) {
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buf.append(sep).append(line);
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buf.append(sep).append(line);
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void openNextFile() throws NoMoreDataException, IOException {
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if (nextFile >= inputFiles.size()) {
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// exhausted files, start a new round, unless forever set to false.
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throw new NoMoreDataException();
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File f = inputFiles.get(nextFile++);
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System.out.println("opening: " + f + " length: " + f.length());
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InputStream inputStream = StreamUtils.inputStream(f); // support either gzip, bzip2, or regular text file, by extension
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reader = new BufferedReader(new InputStreamReader(inputStream, encoding), StreamUtils.BUFFER_SIZE);
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currPathType = TrecDocParser.pathType(f);
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} catch (Exception e) {
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System.out.println("Skipping 'bad' file " + f.getAbsolutePath()+" due to "+e.getMessage());
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throw new NoMoreDataException();
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public Date parseDate(String dateStr) {
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dateStr = dateStr.trim();
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DateFormatInfo dfi = getDateFormatInfo();
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for (int i = 0; i < dfi.dfs.length; i++) {
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DateFormat df = dfi.dfs[i];
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dfi.pos.setErrorIndex(-1);
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Date d = df.parse(dateStr, dfi.pos);
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// do not fail test just because a date could not be parsed
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System.out.println("failed to parse date (assigning 'now') for: " + dateStr);
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public void close() throws IOException {
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if (reader == null) {
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} catch (IOException e) {
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System.out.println("failed to close reader !");
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e.printStackTrace(System.out);
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public DocData getNextDocData(DocData docData) throws NoMoreDataException, IOException {
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StringBuilder docBuf = getDocBuffer();
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ParsePathType parsedPathType;
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// protect reading from the TREC files by multiple threads. The rest of the
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// method, i.e., parsing the content and returning the DocData can run unprotected.
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synchronized (lock) {
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if (reader == null) {
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// 1. skip until doc start - required for all TREC formats
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read(docBuf, DOC, false, false);
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// save parsedFile for passing trecDataParser after the sync block, in
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// case another thread will open another file in between.
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parsedPathType = currPathType;
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// 2. name - required for all TREC formats
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read(docBuf, DOCNO, true, false);
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name = docBuf.substring(DOCNO.length(), docBuf.indexOf(TERMINATING_DOCNO,
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DOCNO.length())).trim();
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if (!excludeDocnameIteration) {
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name = name + "_" + iteration;
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// 3. read all until end of doc
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read(docBuf, TERMINATING_DOC, false, true);
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// count char length of text to be parsed (may be larger than the resulted plain doc body text).
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addBytes(docBuf.length());
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// This code segment relies on HtmlParser being thread safe. When we get
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// here, everything else is already private to that thread, so we're safe.
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docData = trecDocParser.parse(docData, name, this, docBuf, parsedPathType);
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} catch (InterruptedException ie) {
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throw new ThreadInterruptedException(ie);
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public void resetInputs() throws IOException {
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synchronized (lock) {
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public void setConfig(Config config) {
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super.setConfig(config);
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File workDir = new File(config.get("work.dir", "work"));
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String d = config.get("docs.dir", "trec");
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dataDir = new File(d);
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if (!dataDir.isAbsolute()) {
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dataDir = new File(workDir, d);
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collectFiles(dataDir, inputFiles);
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if (inputFiles.size() == 0) {
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throw new IllegalArgumentException("No files in dataDir: " + dataDir);
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String trecDocParserClassName = config.get("trec.doc.parser", "org.apache.lucene.benchmark.byTask.feeds.TrecGov2Parser");
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trecDocParser = Class.forName(trecDocParserClassName).asSubclass(TrecDocParser.class).newInstance();
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} catch (Exception e) {
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// Should not get here. Throw runtime exception.
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throw new RuntimeException(e);
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String htmlParserClassName = config.get("html.parser",
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"org.apache.lucene.benchmark.byTask.feeds.DemoHTMLParser");
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htmlParser = Class.forName(htmlParserClassName).asSubclass(HTMLParser.class).newInstance();
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} catch (Exception e) {
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// Should not get here. Throw runtime exception.
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throw new RuntimeException(e);
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if (encoding == null) {
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encoding = "ISO-8859-1";
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// iteration exclusion in doc name
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excludeDocnameIteration = config.get("content.source.excludeIteration", false);