pylucene 3.5.0-3

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

diff --git a/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/index/FormatPostingsPositionsWriter.java b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/index/FormatPostingsPositionsWriter.java
new file mode 100644 (file)
index 0000000..3649fc4
--- /dev/null
+++ b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/index/FormatPostingsPositionsWriter.java
@@ -0,0 +1,89 @@
+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.index.FieldInfo.IndexOptions;
+import org.apache.lucene.store.IndexOutput;
+import org.apache.lucene.util.IOUtils;
+
+
+import java.io.Closeable;
+import java.io.IOException;
+
+final class FormatPostingsPositionsWriter extends FormatPostingsPositionsConsumer implements Closeable {
+
+  final FormatPostingsDocsWriter parent;
+  final IndexOutput out;
+
+  boolean omitTermFreqAndPositions;
+  boolean storePayloads;
+  int lastPayloadLength = -1;
+
+  FormatPostingsPositionsWriter(SegmentWriteState state, FormatPostingsDocsWriter parent) throws IOException {
+    this.parent = parent;
+    omitTermFreqAndPositions = parent.omitTermFreqAndPositions;
+    if (parent.parent.parent.fieldInfos.hasProx()) {
+      // At least one field does not omit TF, so create the
+      // prox file
+      out = parent.parent.parent.dir.createOutput(IndexFileNames.segmentFileName(parent.parent.parent.segment, IndexFileNames.PROX_EXTENSION));
+      parent.skipListWriter.setProxOutput(out);
+    } else
+      // Every field omits TF so we will write no prox file
+      out = null;
+  }
+
+  int lastPosition;
+
+  /** Add a new position & payload */
+  @Override
+  void addPosition(int position, byte[] payload, int payloadOffset, int payloadLength) throws IOException {
+    assert !omitTermFreqAndPositions: "omitTermFreqAndPositions is true";
+    assert out != null;
+
+    final int delta = position - lastPosition;
+    lastPosition = position;
+
+    if (storePayloads) {
+      if (payloadLength != lastPayloadLength) {
+        lastPayloadLength = payloadLength;
+        out.writeVInt((delta<<1)|1);
+        out.writeVInt(payloadLength);
+      } else
+        out.writeVInt(delta << 1);
+      if (payloadLength > 0)
+        out.writeBytes(payload, payloadLength);
+    } else
+      out.writeVInt(delta);
+  }
+
+  void setField(FieldInfo fieldInfo) {
+    omitTermFreqAndPositions = fieldInfo.indexOptions == IndexOptions.DOCS_ONLY;
+    storePayloads = omitTermFreqAndPositions ? false : fieldInfo.storePayloads;
+  }
+
+  /** Called when we are done adding positions & payloads */
+  @Override
+  void finish() {       
+    lastPosition = 0;
+    lastPayloadLength = -1;
+  }
+
+  public void close() throws IOException {
+    IOUtils.close(out);
+  }
+}