SOLR-1985: FastVectorHighlighter: add wrapper class for Lucene's SingleFragListBuilder

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@961821 13f79535-47bb-0310-9956-ffa450edef68

solr/CHANGES.txt

@@ -194,6 +194,8 @@ New Features
   if fields that do not have term vector options (termVectors, offsets, positions)
    that align with the schema declaration. It also
     will now return warnings about (gsingers)
+
+* SOLR-1985: FastVectorHighlighter: add wrapper class for Lucene's SingleFragListBuilder (koji)
    
 Optimizations
 ----------------------

solr/example/solr/conf/solrconfig.xml

@@ -1019,6 +1019,9 @@
    <!-- Configure the standard fragListBuilder -->
    <fragListBuilder name="simple" class="org.apache.solr.highlight.SimpleFragListBuilder" default="true"/>
 
+   <!-- Configure the single fragListBuilder -->
+   <fragListBuilder name="single" class="org.apache.solr.highlight.SingleFragListBuilder"/>
+
    <!-- multi-colored tag FragmentsBuilder -->
    <fragmentsBuilder name="colored" class="org.apache.solr.highlight.MultiColoredScoreOrderFragmentsBuilder" default="true"/>
   </highlighting>

solr/src/java/org/apache/solr/highlight/SingleFragListBuilder.java

@@ -0,0 +1,59 @@
+/**
+ * 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.
+ */
+
+package org.apache.solr.highlight;
+
+import org.apache.lucene.search.vectorhighlight.FragListBuilder;
+import org.apache.solr.common.params.DefaultSolrParams;
+import org.apache.solr.common.params.SolrParams;
+
+public class SingleFragListBuilder extends HighlightingPluginBase implements
+    SolrFragListBuilder {
+
+  public FragListBuilder getFragListBuilder(SolrParams params) {
+    numRequests++;
+    if( defaults != null ) {
+      params = new DefaultSolrParams( params, defaults );
+    }
+    
+    return new org.apache.lucene.search.vectorhighlight.SingleFragListBuilder();
+  }
+
+  ///////////////////////////////////////////////////////////////////////
+  //////////////////////// SolrInfoMBeans methods ///////////////////////
+  ///////////////////////////////////////////////////////////////////////
+
+  @Override
+  public String getDescription() {
+    return "SingleFragListBuilder";
+  }
+
+  @Override
+  public String getSource() {
+    return "$URL$";
+  }
+
+  @Override
+  public String getSourceId() {
+    return "$Id$";
+  }
+
+  @Override
+  public String getVersion() {
+    return "$Revision$";
+  }
+}