--- /dev/null
+package org.apache.lucene.benchmark.byTask.feeds;
+
+/**
+ * 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 java.io.File;
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Locale;
+import java.util.Map;
+
+/**
+ * Parser for trec doc content, invoked on doc text excluding <DOC> and <DOCNO>
+ * which are handled in TrecContentSource. Required to be stateless and hence thread safe.
+ */
+public abstract class TrecDocParser {
+
+ /** Types of trec parse paths, */
+ public enum ParsePathType { GOV2, FBIS, FT, FR94, LATIMES }
+
+ /** trec parser type used for unknown extensions */
+ public static final ParsePathType DEFAULT_PATH_TYPE = ParsePathType.GOV2;
+
+ static final Map<ParsePathType,TrecDocParser> pathType2parser = new HashMap<ParsePathType,TrecDocParser>();
+ static {
+ pathType2parser.put(ParsePathType.GOV2, new TrecGov2Parser());
+ pathType2parser.put(ParsePathType.FBIS, new TrecFBISParser());
+ pathType2parser.put(ParsePathType.FR94, new TrecFR94Parser());
+ pathType2parser.put(ParsePathType.FT, new TrecFTParser());
+ pathType2parser.put(ParsePathType.LATIMES, new TrecLATimesParser());
+ }
+
+ static final Map<String,ParsePathType> pathName2Type = new HashMap<String,ParsePathType>();
+ static {
+ for (ParsePathType ppt : ParsePathType.values()) {
+ pathName2Type.put(ppt.name().toUpperCase(Locale.ENGLISH),ppt);
+ }
+ }
+
+ /** max length of walk up from file to its ancestors when looking for a known path type */
+ private static final int MAX_PATH_LENGTH = 10;
+
+ /**
+ * Compute the path type of a file by inspecting name of file and its parents
+ */
+ public static ParsePathType pathType(File f) {
+ int pathLength = 0;
+ while (f != null && ++pathLength < MAX_PATH_LENGTH) {
+ ParsePathType ppt = pathName2Type.get(f.getName().toUpperCase(Locale.ENGLISH));
+ if (ppt!=null) {
+ return ppt;
+ }
+ f = f.getParentFile();
+ }
+ return DEFAULT_PATH_TYPE;
+ }
+
+ /**
+ * parse the text prepared in docBuf into a result DocData,
+ * no synchronization is required.
+ * @param docData reusable result
+ * @param name name that should be set to the result
+ * @param trecSrc calling trec content source
+ * @param docBuf text to parse
+ * @param pathType type of parsed file, or null if unknown - may be used by
+ * parsers to alter their behavior according to the file path type.
+ */
+ public abstract DocData parse(DocData docData, String name, TrecContentSource trecSrc,
+ StringBuilder docBuf, ParsePathType pathType) throws IOException, InterruptedException;
+
+ /**
+ * strip tags from <code>buf</code>: each tag is replaced by a single blank.
+ * @return text obtained when stripping all tags from <code>buf</code> (Input StringBuilder is unmodified).
+ */
+ public static String stripTags(StringBuilder buf, int start) {
+ return stripTags(buf.substring(start),0);
+ }
+
+ /**
+ * strip tags from input.
+ * @see #stripTags(StringBuilder, int)
+ */
+ public static String stripTags(String buf, int start) {
+ if (start>0) {
+ buf = buf.substring(0);
+ }
+ return buf.replaceAll("<[^>]*>", " ");
+ }
+
+ /**
+ * Extract from <code>buf</code> the text of interest within specified tags
+ * @param buf entire input text
+ * @param startTag tag marking start of text of interest
+ * @param endTag tag marking end of text of interest
+ * @param maxPos if ≥ 0 sets a limit on start of text of interest
+ * @return text of interest or null if not found
+ */
+ public static String extract(StringBuilder buf, String startTag, String endTag, int maxPos, String noisePrefixes[]) {
+ int k1 = buf.indexOf(startTag);
+ if (k1>=0 && (maxPos<0 || k1<maxPos)) {
+ k1 += startTag.length();
+ int k2 = buf.indexOf(endTag,k1);
+ if (k2>=0 && (maxPos<0 || k2<maxPos)) { // found end tag with allowed range
+ if (noisePrefixes != null) {
+ for (String noise : noisePrefixes) {
+ int k1a = buf.indexOf(noise,k1);
+ if (k1a>=0 && k1a<k2) {
+ k1 = k1a + noise.length();
+ }
+ }
+ }
+ return buf.substring(k1,k2).trim();
+ }
+ }
+ return null;
+ }
+
+ //public static void main(String[] args) {
+ // System.out.println(stripTags("is it true that<space>2<<second space>><almost last space>1<one more space>?",0));
+ //}
+
+}
fnp / pylucene.git / blobdiff