archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-08-28 15:24:43 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

8265029: Preserve SIZED characteristics on slice operations (skip, limit)

Browse source 
Reviewed-by: psandoz
This commit is contained in:
Tagir F. Valeev 2021-05-28 01:56:38 +00:00
parent 95b1fa7a88
commit 0c9daa7ed5
12 changed files with 704 additions and 89 deletions
Download patch file Download diff file Expand all files Collapse all files

42
src/java.base/share/classes/java/util/stream/ReduceOps.java
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2012, 2015, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2012, 2021, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -252,16 +252,18 @@ final class ReduceOps {
@Override
public <P_IN> Long evaluateSequential(PipelineHelper<T> helper,
Spliterator<P_IN> spliterator) {
if (StreamOpFlag.SIZED.isKnown(helper.getStreamAndOpFlags()))
return spliterator.getExactSizeIfKnown();
long size = helper.exactOutputSizeIfKnown(spliterator);
if (size != -1)
return size;
return super.evaluateSequential(helper, spliterator);
}
@Override
public <P_IN> Long evaluateParallel(PipelineHelper<T> helper,
Spliterator<P_IN> spliterator) {
if (StreamOpFlag.SIZED.isKnown(helper.getStreamAndOpFlags()))
return spliterator.getExactSizeIfKnown();
long size = helper.exactOutputSizeIfKnown(spliterator);
if (size != -1)
return size;
return super.evaluateParallel(helper, spliterator);
}
@ -426,16 +428,18 @@ final class ReduceOps {
@Override
public <P_IN> Long evaluateSequential(PipelineHelper<Integer> helper,
Spliterator<P_IN> spliterator) {
if (StreamOpFlag.SIZED.isKnown(helper.getStreamAndOpFlags()))
return spliterator.getExactSizeIfKnown();
long size = helper.exactOutputSizeIfKnown(spliterator);
if (size != -1)
return size;
return super.evaluateSequential(helper, spliterator);
}
@Override
public <P_IN> Long evaluateParallel(PipelineHelper<Integer> helper,
Spliterator<P_IN> spliterator) {
if (StreamOpFlag.SIZED.isKnown(helper.getStreamAndOpFlags()))
return spliterator.getExactSizeIfKnown();
long size = helper.exactOutputSizeIfKnown(spliterator);
if (size != -1)
return size;
return super.evaluateParallel(helper, spliterator);
}
@ -600,16 +604,18 @@ final class ReduceOps {
@Override
public <P_IN> Long evaluateSequential(PipelineHelper<Long> helper,
Spliterator<P_IN> spliterator) {
if (StreamOpFlag.SIZED.isKnown(helper.getStreamAndOpFlags()))
return spliterator.getExactSizeIfKnown();
long size = helper.exactOutputSizeIfKnown(spliterator);
if (size != -1)
return size;
return super.evaluateSequential(helper, spliterator);
}
@Override
public <P_IN> Long evaluateParallel(PipelineHelper<Long> helper,
Spliterator<P_IN> spliterator) {
if (StreamOpFlag.SIZED.isKnown(helper.getStreamAndOpFlags()))
return spliterator.getExactSizeIfKnown();
long size = helper.exactOutputSizeIfKnown(spliterator);
if (size != -1)
return size;
return super.evaluateParallel(helper, spliterator);
}
@ -774,16 +780,18 @@ final class ReduceOps {
@Override
public <P_IN> Long evaluateSequential(PipelineHelper<Double> helper,
Spliterator<P_IN> spliterator) {
if (StreamOpFlag.SIZED.isKnown(helper.getStreamAndOpFlags()))
return spliterator.getExactSizeIfKnown();
long size = helper.exactOutputSizeIfKnown(spliterator);
if (size != -1)
return size;
return super.evaluateSequential(helper, spliterator);
}
@Override
public <P_IN> Long evaluateParallel(PipelineHelper<Double> helper,
Spliterator<P_IN> spliterator) {
if (StreamOpFlag.SIZED.isKnown(helper.getStreamAndOpFlags()))
return spliterator.getExactSizeIfKnown();
long size = helper.exactOutputSizeIfKnown(spliterator);
if (size != -1)
return size;
return super.evaluateParallel(helper, spliterator);
}