svn commit: r541402 - in /lucene/java/trunk: CHANGES.txt src/java/org/apache/lucene/store/BufferedIndexInput.java

[bu...@apache.org]

Author: buschmi
Date: Thu May 24 12:42:47 2007
New Revision: 541402

URL: http://svn.apache.org/viewvc?view=rev&rev=541402
Log:
LUCENE-430: Delay allocation of the buffer after a clone of BufferedIndexInput.

Modified:
    lucene/java/trunk/CHANGES.txt
    lucene/java/trunk/src/java/org/apache/lucene/store/BufferedIndexInput.java

Modified: lucene/java/trunk/CHANGES.txt
URL: http://svn.apache.org/viewvc/lucene/java/trunk/CHANGES.txt?view=diff&rev=541402&r1=541401&r2=541402
==============================================================================
--- lucene/java/trunk/CHANGES.txt (original)
+++ lucene/java/trunk/CHANGES.txt Thu May 24 12:42:47 2007
@@ -180,6 +180,10 @@
 
  4. LUCENE-882: Spellchecker doesn't store the ngrams anymore but only indexes
     them to keep the spell index small. (Daniel Naber)
+
+ 5. LUCENE-430: Delay allocation of the buffer after a clone of BufferedIndexInput.
+    Together with LUCENE-888 this will allow to adjust the buffer size
+    dynamically. (Paul Elschot, Michael Busch)
  
 Documentation
 

Modified: lucene/java/trunk/src/java/org/apache/lucene/store/BufferedIndexInput.java
URL: http://svn.apache.org/viewvc/lucene/java/trunk/src/java/org/apache/lucene/store/BufferedIndexInput.java?view=diff&rev=541402&r1=541401&r2=541402
==============================================================================
--- lucene/java/trunk/src/java/org/apache/lucene/store/BufferedIndexInput.java (original)
+++ lucene/java/trunk/src/java/org/apache/lucene/store/BufferedIndexInput.java Thu May 24 12:42:47 2007
@@ -88,8 +88,10 @@
     if (bufferLength <= 0)
       throw new IOException("read past EOF");
 
-    if (buffer == null)
+    if (buffer == null) {
       buffer = new byte[BUFFER_SIZE];		  // allocate buffer lazily
+      seekInternal(bufferStart);
+    }
     readInternal(buffer, 0, bufferLength);
 
     bufferStart = start;
@@ -127,10 +129,10 @@
   public Object clone() {
     BufferedIndexInput clone = (BufferedIndexInput)super.clone();
 
-    if (buffer != null) {
-      clone.buffer = new byte[BUFFER_SIZE];
-      System.arraycopy(buffer, 0, clone.buffer, 0, bufferLength);
-    }
+    clone.buffer = null;
+    clone.bufferLength = 0;
+    clone.bufferPosition = 0;
+    clone.bufferStart = getFilePointer();
 
     return clone;
   }