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LUCENE-761: The proxStream is now cloned lazily in SegmentTermPositions when nextPosition() is called for the first time. 

git-svn-id: https://svn.apache.org/repos/asf/lucene/java/trunk@516863 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Michael Busch 2007-03-11 07:06:40 +00:00
parent 45ff9e467a
commit 0b706b4688
2 changed files with 11 additions and 2 deletions
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4
CHANGES.txt
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@ -66,6 +66,10 @@ New features
Optimizations Optimizations
1. LUCENE-761: The proxStream is now cloned lazily in SegmentTermPositions
when nextPosition() is called for the first time. This allows using instances
of SegmentTermPositions instead of SegmentTermDocs without additional costs.
(Michael Busch)
Documentation: Documentation:
1. LUCENE 791 && INFRA-1173: Infrastructure moved the Wiki to http://wiki.apache.org/lucene-java/ Updated the links in the docs and wherever else I found references. (Grant Ingersoll, Joe Schaefer) 1. LUCENE 791 && INFRA-1173: Infrastructure moved the Wiki to http://wiki.apache.org/lucene-java/ Updated the links in the docs and wherever else I found references. (Grant Ingersoll, Joe Schaefer)

9
src/java/org/apache/lucene/index/SegmentTermPositions.java
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@ -34,7 +34,7 @@ extends SegmentTermDocs implements TermPositions {
SegmentTermPositions(SegmentReader p) { SegmentTermPositions(SegmentReader p) {
super(p); super(p);
this.proxStream = (IndexInput)parent.proxStream.clone(); this.proxStream = null; // the proxStream will be cloned lazily when nextPosition() is called for the first time
} }
final void seek(TermInfo ti) throws IOException { final void seek(TermInfo ti) throws IOException {
@ -48,7 +48,7 @@ extends SegmentTermDocs implements TermPositions {
public final void close() throws IOException { public final void close() throws IOException {
super.close(); super.close();
proxStream.close(); if (proxStream != null) proxStream.close();
} }
public final int nextPosition() throws IOException { public final int nextPosition() throws IOException {
@ -105,6 +105,11 @@ extends SegmentTermDocs implements TermPositions {
// So we move the prox pointer lazily to the document // So we move the prox pointer lazily to the document
// as soon as positions are requested. // as soon as positions are requested.
private void lazySkip() throws IOException { private void lazySkip() throws IOException {
if (proxStream == null) {
// clone lazily
proxStream = (IndexInput)parent.proxStream.clone();
}
if (lazySkipPointer != 0) { if (lazySkipPointer != 0) {
proxStream.seek(lazySkipPointer); proxStream.seek(lazySkipPointer);
lazySkipPointer = 0; lazySkipPointer = 0;