pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / contrib / misc / src / java / org / apache / lucene / misc / GetTermInfo.java

diff --git a/lucene-java-3.5.0/lucene/contrib/misc/src/java/org/apache/lucene/misc/GetTermInfo.java b/lucene-java-3.5.0/lucene/contrib/misc/src/java/org/apache/lucene/misc/GetTermInfo.java
new file mode 100644 (file)
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+++ b/lucene-java-3.5.0/lucene/contrib/misc/src/java/org/apache/lucene/misc/GetTermInfo.java
@@ -0,0 +1,63 @@
+package org.apache.lucene.misc;
+
+/**
+ * Copyright 2004 The Apache Software Foundation
+ *
+ * Licensed 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.File;
+import org.apache.lucene.store.Directory;
+import org.apache.lucene.store.FSDirectory;
+
+import org.apache.lucene.index.Term;
+import org.apache.lucene.index.IndexReader;
+
+
+/*
+ * Utility to get document frequency and total number of occurrences (sum of the tf for each doc)  of a term. 
+ */
+public class GetTermInfo {
+  
+    public static void main(String[] args) throws Exception {
+    
+    FSDirectory dir = null;
+    String inputStr = null;
+    String field = null;
+    
+    if (args.length == 3) {
+      dir = FSDirectory.open(new File(args[0]));
+      field = args[1];
+      inputStr = args[2];
+    } else {
+      usage();
+      System.exit(1);
+    }
+    Term term = new Term(field, inputStr);
+    getTermInfo(dir,term);
+  }
+  
+    public static void getTermInfo(Directory dir, Term term) throws Exception {
+    IndexReader reader = IndexReader.open(dir);
+    
+    long totalTF = HighFreqTerms.getTotalTermFreq(reader, term);
+    System.out.printf("%s:%s \t total_tf = %,d \t doc freq = %,d \n",
+        term.field(), term.text(), totalTF, reader.docFreq(term)); 
+  }
+   
+  private static void usage() {
+    System.out
+        .println("\n\nusage:\n\t"
+            + "java " + GetTermInfo.class.getName() + " <index dir> field term \n\n");
+  }
+}