SOLR-792: fix pivot facet native type representation via FieldType.toObject(indexedTerm)

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1031863 13f79535-47bb-0310-9956-ffa450edef68

solr/src/java/org/apache/solr/schema/StrFieldSource.java

@@ -0,0 +1,94 @@
+/**
+ * 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.schema;
+
+import org.apache.lucene.index.IndexReader;
+import org.apache.lucene.util.BytesRef;
+import org.apache.solr.search.function.DocValues;
+import org.apache.solr.search.function.FieldCacheSource;
+import org.apache.solr.search.function.StringIndexDocValues;
+
+import java.io.IOException;
+import java.util.Map;
+
+public class StrFieldSource extends FieldCacheSource {
+
+  public StrFieldSource(String field) {
+    super(field);
+  }
+
+  public String description() {
+    return "str(" + field + ')';
+  }
+
+  public DocValues getValues(Map context, IndexReader reader) throws IOException {
+    return new StringIndexDocValues(this, reader, field) {
+      protected String toTerm(String readableValue) {
+        return readableValue;
+      }
+
+      public float floatVal(int doc) {
+        return (float)intVal(doc);
+      }
+
+      public int intVal(int doc) {
+        int ord=termsIndex.getOrd(doc);
+        return ord;
+      }
+
+      public long longVal(int doc) {
+        return (long)intVal(doc);
+      }
+
+      public double doubleVal(int doc) {
+        return (double)intVal(doc);
+      }
+
+      public int ordVal(int doc) {
+        return termsIndex.getOrd(doc);
+      }
+
+      public int numOrd() {
+        return termsIndex.numOrd();
+      }
+
+      public String strVal(int doc) {
+        int ord=termsIndex.getOrd(doc);
+        if (ord == 0) {
+          return null;
+        } else {
+          return termsIndex.lookup(ord, new BytesRef()).utf8ToString();
+        }
+      }
+
+      public String toString(int doc) {
+        return description() + '=' + strVal(doc);
+      }
+    };
+  }
+
+  public boolean equals(Object o) {
+    return o instanceof StrFieldSource
+            && super.equals(o);
+  }
+
+  private static int hcode = SortableFloatFieldSource.class.hashCode();
+  public int hashCode() {
+    return hcode + super.hashCode();
+  };
+}