pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / src / test / org / apache / lucene / search / TestScoreCachingWrappingScorer.java

diff --git a/lucene-java-3.5.0/lucene/src/test/org/apache/lucene/search/TestScoreCachingWrappingScorer.java b/lucene-java-3.5.0/lucene/src/test/org/apache/lucene/search/TestScoreCachingWrappingScorer.java
new file mode 100644 (file)
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--- /dev/null
+++ b/lucene-java-3.5.0/lucene/src/test/org/apache/lucene/search/TestScoreCachingWrappingScorer.java
@@ -0,0 +1,115 @@
+package org.apache.lucene.search;
+
+/**
+ * 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.IOException;
+
+import org.apache.lucene.index.IndexReader;
+import org.apache.lucene.util.LuceneTestCase;
+
+public class TestScoreCachingWrappingScorer extends LuceneTestCase {
+
+  private static final class SimpleScorer extends Scorer {
+    private int idx = 0;
+    private int doc = -1;
+    
+    public SimpleScorer() {
+      super((Similarity)null);
+    }
+    
+    @Override public float score() throws IOException {
+      // advance idx on purpose, so that consecutive calls to score will get
+      // different results. This is to emulate computation of a score. If
+      // ScoreCachingWrappingScorer is used, this should not be called more than
+      // once per document.
+      return idx == scores.length ? Float.NaN : scores[idx++];
+    }
+
+    @Override public int docID() { return doc; }
+
+    @Override public int nextDoc() throws IOException {
+      return ++doc < scores.length ? doc : NO_MORE_DOCS;
+    }
+    
+    @Override public int advance(int target) throws IOException {
+      doc = target;
+      return doc < scores.length ? doc : NO_MORE_DOCS;
+    }
+    
+  }
+  
+  private static final class ScoreCachingCollector extends Collector {
+
+    private int idx = 0;
+    private Scorer scorer;
+    float[] mscores;
+    
+    public ScoreCachingCollector(int numToCollect) {
+      mscores = new float[numToCollect];
+    }
+    
+    @Override public void collect(int doc) throws IOException {
+      // just a sanity check to avoid IOOB.
+      if (idx == mscores.length) {
+        return; 
+      }
+      
+      // just call score() a couple of times and record the score.
+      mscores[idx] = scorer.score();
+      mscores[idx] = scorer.score();
+      mscores[idx] = scorer.score();
+      ++idx;
+    }
+
+    @Override public void setNextReader(IndexReader reader, int docBase)
+        throws IOException {
+    }
+
+    @Override public void setScorer(Scorer scorer) throws IOException {
+      this.scorer = new ScoreCachingWrappingScorer(scorer);
+    }
+    
+    @Override public boolean acceptsDocsOutOfOrder() {
+      return true;
+    }
+
+  }
+
+  private static final float[] scores = new float[] { 0.7767749f, 1.7839992f,
+      8.9925785f, 7.9608946f, 0.07948637f, 2.6356435f, 7.4950366f, 7.1490803f,
+      8.108544f, 4.961808f, 2.2423935f, 7.285586f, 4.6699767f };
+  
+  public void testGetScores() throws Exception {
+    
+    Scorer s = new SimpleScorer();
+    ScoreCachingCollector scc = new ScoreCachingCollector(scores.length);
+    scc.setScorer(s);
+    
+    // We need to iterate on the scorer so that its doc() advances.
+    int doc;
+    while ((doc = s.nextDoc()) != DocIdSetIterator.NO_MORE_DOCS) {
+      scc.collect(doc);
+    }
+    
+    for (int i = 0; i < scores.length; i++) {
+      assertEquals(scores[i], scc.mscores[i], 0f);
+    }
+    
+  }
+  
+}