pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / contrib / benchmark / src / java / org / apache / lucene / benchmark / byTask / feeds / SimpleSloppyPhraseQueryMaker.java

diff --git a/lucene-java-3.5.0/lucene/contrib/benchmark/src/java/org/apache/lucene/benchmark/byTask/feeds/SimpleSloppyPhraseQueryMaker.java b/lucene-java-3.5.0/lucene/contrib/benchmark/src/java/org/apache/lucene/benchmark/byTask/feeds/SimpleSloppyPhraseQueryMaker.java
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+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.util.ArrayList;
+import java.util.StringTokenizer;
+
+import org.apache.lucene.index.Term;
+import org.apache.lucene.search.PhraseQuery;
+import org.apache.lucene.search.Query;
+
+/**
+ * Create sloppy phrase queries for performance test, in an index created using simple doc maker.
+ */
+public class SimpleSloppyPhraseQueryMaker extends SimpleQueryMaker {
+
+  /* (non-Javadoc)
+   * @see org.apache.lucene.benchmark.byTask.feeds.SimpleQueryMaker#prepareQueries()
+   */
+  @Override
+  protected Query[] prepareQueries() throws Exception {
+    // extract some 100 words from doc text to an array
+    String words[];
+    ArrayList<String> w = new ArrayList<String>();
+    StringTokenizer st = new StringTokenizer(SingleDocSource.DOC_TEXT);
+    while (st.hasMoreTokens() && w.size()<100) {
+      w.add(st.nextToken());
+    }
+    words = w.toArray(new String[0]);
+
+    // create queries (that would find stuff) with varying slops
+    ArrayList<Query> queries = new ArrayList<Query>(); 
+    for (int slop=0; slop<8; slop++) {
+      for (int qlen=2; qlen<6; qlen++) {
+        for (int wd=0; wd<words.length-qlen-slop; wd++) {
+          // ordered
+          int remainedSlop = slop;
+          PhraseQuery q = new PhraseQuery();
+          q.setSlop(slop);
+          int wind = wd;
+          for (int i=0; i<qlen; i++) {
+            q.add(new Term(DocMaker.BODY_FIELD,words[wind++]));
+            if (remainedSlop>0) {
+              remainedSlop--;
+              wind++;
+            }
+          }
+          queries.add(q);
+          // reversed
+          remainedSlop = slop;
+          q = new PhraseQuery();
+          q.setSlop(slop+2*qlen);
+          wind = wd+qlen+remainedSlop-1;
+          for (int i=0; i<qlen; i++) {
+            q.add(new Term(DocMaker.BODY_FIELD,words[wind--]));
+            if (remainedSlop>0) {
+              remainedSlop--;
+              wind--;
+            }
+          }
+          queries.add(q);
+        }
+      }
+    }
+    return queries.toArray(new Query[0]);
+  }
+
+}