/**
* Twitter Tools
*
* Licensed 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 cc.twittertools.search;
import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import com.google.common.base.Charsets;
import com.google.common.base.Joiner;
import com.google.common.base.Preconditions;
import com.google.common.collect.Lists;
import com.google.common.io.Files;
public class TrecTopicSet implements Iterable<TrecTopic>{
private List<TrecTopic> queries = Lists.newArrayList();
private TrecTopicSet() {}
private void add(TrecTopic q) {
queries.add(q);
}
@Override
public Iterator<TrecTopic> iterator() {
return queries.iterator();
}
private static final Pattern TOP_PATTERN = Pattern.compile("<top(.*?)</top>", Pattern.DOTALL);
private static final Pattern NUM_PATTERN = Pattern.compile("<num> Number: (MB\\d+) </num>", Pattern.DOTALL);
// TREC 2011 topics uses <title> tag
private static final Pattern TITLE_PATTERN = Pattern.compile("<title>\\s*(.*?)\\s*</title>", Pattern.DOTALL);
// TREC 2012 topics use <query> tag
private static final Pattern TITLE_PATTERN2 = Pattern.compile("<query>\\s*(.*?)\\s*</query>", Pattern.DOTALL);
private static final Pattern TWEETTIME_PATTERN = Pattern.compile("<querytweettime>\\s*(\\d+)\\s*</querytweettime>", Pattern.DOTALL);
public static TrecTopicSet fromFile(File f) throws IOException {
Preconditions.checkNotNull(f);
Preconditions.checkArgument(f.exists());
String s = Joiner.on("\n").join(Files.readLines(f, Charsets.UTF_8));
TrecTopicSet queries = new TrecTopicSet();
Matcher matcher = TOP_PATTERN.matcher(s);
while (matcher.find()) {
String top = matcher.group(0);
Matcher m = NUM_PATTERN.matcher(top);
if (!m.find()) {
throw new IOException("Error parsing " + f);
}
String id = m.group(1);
// Topics from 2012 are inconsistently numbered,
// e.g., MB051 should match the qrels, which has MB51
if (id.matches("MB0\\d\\d")) {
id = id.replace("MB0", "MB");
}
m = TITLE_PATTERN.matcher(top);
if (!m.find()) {
m = TITLE_PATTERN2.matcher(top);
if (!m.find()) {
throw new IOException("Error parsing " + f);
}
}
String text = m.group(1);
m = TWEETTIME_PATTERN.matcher(top);
if (!m.find()) {
throw new IOException("Error parsing " + f);
}
long time = Long.parseLong(m.group(1));
queries.add(new TrecTopic(id, text, time));
}
return queries;
}
}