pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / src / java / org / apache / lucene / index / NormsWriterPerField.java

diff --git a/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/index/NormsWriterPerField.java b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/index/NormsWriterPerField.java
new file mode 100644 (file)
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--- /dev/null
+++ b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/index/NormsWriterPerField.java
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+package org.apache.lucene.index;
+
+/**
+ * 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 org.apache.lucene.util.ArrayUtil;
+import org.apache.lucene.search.Similarity;
+
+/** Taps into DocInverter, as an InvertedDocEndConsumer,
+ *  which is called at the end of inverting each field.  We
+ *  just look at the length for the field (docState.length)
+ *  and record the norm. */
+
+final class NormsWriterPerField extends InvertedDocEndConsumerPerField implements Comparable<NormsWriterPerField> {
+
+  final NormsWriterPerThread perThread;
+  final FieldInfo fieldInfo;
+  final DocumentsWriter.DocState docState;
+
+  // Holds all docID/norm pairs we've seen
+  int[] docIDs = new int[1];
+  byte[] norms = new byte[1];
+  int upto;
+
+  final FieldInvertState fieldState;
+
+  public void reset() {
+    // Shrink back if we are overallocated now:
+    docIDs = ArrayUtil.shrink(docIDs, upto);
+    norms = ArrayUtil.shrink(norms, upto);
+    upto = 0;
+  }
+
+  public NormsWriterPerField(final DocInverterPerField docInverterPerField, final NormsWriterPerThread perThread, final FieldInfo fieldInfo) {
+    this.perThread = perThread;
+    this.fieldInfo = fieldInfo;
+    docState = perThread.docState;
+    fieldState = docInverterPerField.fieldState;
+  }
+
+  @Override
+  void abort() {
+    upto = 0;
+  }
+
+  public int compareTo(NormsWriterPerField other) {
+    return fieldInfo.name.compareTo(other.fieldInfo.name);
+  }
+  
+  @Override
+  void finish() {
+    if (fieldInfo.isIndexed && !fieldInfo.omitNorms) {
+      if (docIDs.length <= upto) {
+        assert docIDs.length == upto;
+        docIDs = ArrayUtil.grow(docIDs, 1+upto);
+      }
+      if (norms.length <= upto) {
+        assert norms.length == upto;
+        norms = ArrayUtil.grow(norms, 1+upto);
+      }
+      final float norm = docState.similarity.computeNorm(fieldInfo.name, fieldState);
+      norms[upto] = docState.similarity.encodeNormValue(norm);
+      docIDs[upto] = docState.docID;
+      upto++;
+    }
+  }
+}