pylucene 3.5.0-3

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

diff --git a/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/index/IntBlockPool.java b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/index/IntBlockPool.java
new file mode 100644 (file)
index 0000000..013c7b3
--- /dev/null
+++ b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/index/IntBlockPool.java
@@ -0,0 +1,63 @@
+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.
+ */
+
+final class IntBlockPool {
+
+  public int[][] buffers = new int[10][];
+
+  int bufferUpto = -1;                        // Which buffer we are upto
+  public int intUpto = DocumentsWriter.INT_BLOCK_SIZE;             // Where we are in head buffer
+
+  public int[] buffer;                              // Current head buffer
+  public int intOffset = -DocumentsWriter.INT_BLOCK_SIZE;          // Current head offset
+
+  final private DocumentsWriter docWriter;
+
+  public IntBlockPool(DocumentsWriter docWriter) {
+    this.docWriter = docWriter;
+  }
+
+  public void reset() {
+    if (bufferUpto != -1) {
+      if (bufferUpto > 0)
+        // Recycle all but the first buffer
+        docWriter.recycleIntBlocks(buffers, 1, 1+bufferUpto);
+
+      // Reuse first buffer
+      bufferUpto = 0;
+      intUpto = 0;
+      intOffset = 0;
+      buffer = buffers[0];
+    }
+  }
+
+  public void nextBuffer() {
+    if (1+bufferUpto == buffers.length) {
+      int[][] newBuffers = new int[(int) (buffers.length*1.5)][];
+      System.arraycopy(buffers, 0, newBuffers, 0, buffers.length);
+      buffers = newBuffers;
+    }
+    buffer = buffers[1+bufferUpto] = docWriter.getIntBlock();
+    bufferUpto++;
+
+    intUpto = 0;
+    intOffset += DocumentsWriter.INT_BLOCK_SIZE;
+  }
+}
+