pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / contrib / highlighter / src / java / org / apache / lucene / search / vectorhighlight / ScoreOrderFragmentsBuilder.java

diff --git a/lucene-java-3.5.0/lucene/contrib/highlighter/src/java/org/apache/lucene/search/vectorhighlight/ScoreOrderFragmentsBuilder.java b/lucene-java-3.5.0/lucene/contrib/highlighter/src/java/org/apache/lucene/search/vectorhighlight/ScoreOrderFragmentsBuilder.java
new file mode 100644 (file)
index 0000000..a2e6e29
--- /dev/null
+++ b/lucene-java-3.5.0/lucene/contrib/highlighter/src/java/org/apache/lucene/search/vectorhighlight/ScoreOrderFragmentsBuilder.java
@@ -0,0 +1,78 @@
+package org.apache.lucene.search.vectorhighlight;
+
+/**
+ * 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.Collections;
+import java.util.Comparator;
+import java.util.List;
+
+import org.apache.lucene.search.vectorhighlight.FieldFragList.WeightedFragInfo;
+
+/**
+ * An implementation of FragmentsBuilder that outputs score-order fragments.
+ */
+public class ScoreOrderFragmentsBuilder extends BaseFragmentsBuilder {
+
+  /**
+   * a constructor.
+   */
+  public ScoreOrderFragmentsBuilder(){
+    super();
+  }
+
+  /**
+   * a constructor.
+   * 
+   * @param preTags array of pre-tags for markup terms.
+   * @param postTags array of post-tags for markup terms.
+   */
+  public ScoreOrderFragmentsBuilder( String[] preTags, String[] postTags ){
+    super( preTags, postTags );
+  }
+
+  public ScoreOrderFragmentsBuilder( BoundaryScanner bs ){
+    super( bs );
+  }
+
+  public ScoreOrderFragmentsBuilder( String[] preTags, String[] postTags, BoundaryScanner bs ){
+    super( preTags, postTags, bs );
+  }
+
+  /**
+   * Sort by score the list of WeightedFragInfo
+   */
+  @Override
+  public List<WeightedFragInfo> getWeightedFragInfoList( List<WeightedFragInfo> src ) {
+    Collections.sort( src, new ScoreComparator() );
+    return src;
+  }
+
+  public static class ScoreComparator implements Comparator<WeightedFragInfo> {
+
+    public int compare( WeightedFragInfo o1, WeightedFragInfo o2 ) {
+      if( o1.totalBoost > o2.totalBoost ) return -1;
+      else if( o1.totalBoost < o2.totalBoost ) return 1;
+      // if same score then check startOffset
+      else{
+        if( o1.startOffset < o2.startOffset ) return -1;
+        else if( o1.startOffset > o2.startOffset ) return 1;
+      }
+      return 0;
+    }
+  }
+}