pylucene 3.5.0-3

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

diff --git a/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/index/CharBlockPool.java b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/index/CharBlockPool.java
new file mode 100644 (file)
index 0000000..39d2445
--- /dev/null
+++ b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/index/CharBlockPool.java
@@ -0,0 +1,60 @@
+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 static org.apache.lucene.util.RamUsageEstimator.NUM_BYTES_OBJECT_REF;
+import org.apache.lucene.util.ArrayUtil;
+
+final class CharBlockPool {
+
+  public char[][] buffers = new char[10][];
+  int numBuffer;
+
+  int bufferUpto = -1;                        // Which buffer we are upto
+  public int charUpto = DocumentsWriter.CHAR_BLOCK_SIZE;             // Where we are in head buffer
+
+  public char[] buffer;                              // Current head buffer
+  public int charOffset = -DocumentsWriter.CHAR_BLOCK_SIZE;          // Current head offset
+  final private DocumentsWriter docWriter;
+
+  public CharBlockPool(DocumentsWriter docWriter) {
+    this.docWriter = docWriter;
+  }
+
+  public void reset() {
+    docWriter.recycleCharBlocks(buffers, 1+bufferUpto);
+    bufferUpto = -1;
+    charUpto = DocumentsWriter.CHAR_BLOCK_SIZE;
+    charOffset = -DocumentsWriter.CHAR_BLOCK_SIZE;
+  }
+
+  public void nextBuffer() {
+    if (1+bufferUpto == buffers.length) {
+      char[][] newBuffers = new char[ArrayUtil.oversize(buffers.length+1,
+                                                        NUM_BYTES_OBJECT_REF)][];
+      System.arraycopy(buffers, 0, newBuffers, 0, buffers.length);
+      buffers = newBuffers;
+    }
+    buffer = buffers[1+bufferUpto] = docWriter.getCharBlock();
+    bufferUpto++;
+
+    charUpto = 0;
+    charOffset += DocumentsWriter.CHAR_BLOCK_SIZE;
+  }
+}
+