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Implemented last-access-caching for getLazyBlock().

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This commit is contained in:
sk89q 2014-03-31 18:43:47 -07:00
parent fa24eb60fa
commit b2d1562595
2 changed files with 68 additions and 1 deletions
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3
src/main/java/com/sk89q/worldedit/EditSession.java
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@ -129,7 +129,8 @@ public class EditSession implements Extent {
// This extents are ALWAYS used
fastModeExtent = new FastModeExtent(world, false);
ChunkLoadingExtent chunkLoadingExtent = new ChunkLoadingExtent(fastModeExtent, world);
BlockQuirkExtent quirkExtent = new BlockQuirkExtent(chunkLoadingExtent, world);
LastAccessExtentCache cacheExtent = new LastAccessExtentCache(chunkLoadingExtent);
BlockQuirkExtent quirkExtent = new BlockQuirkExtent(cacheExtent, world);
DataValidatorExtent validator = new DataValidatorExtent(quirkExtent, world);
blockBagExtent = new BlockBagExtent(validator, world, blockBag);

66
src/main/java/com/sk89q/worldedit/extent/LastAccessExtentCache.java Normal file
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@ -0,0 +1,66 @@
/*
* WorldEdit, a Minecraft world manipulation toolkit
* Copyright (C) sk89q <http://www.sk89q.com>
* Copyright (C) WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.worldedit.extent;
import com.sk89q.worldedit.BlockVector;
import com.sk89q.worldedit.Vector;
import com.sk89q.worldedit.blocks.BaseBlock;
/**
* Returns the same cached {@link BaseBlock} for repeated calls to
* {@link #getLazyBlock(Vector)} with the same position.
*/
public class LastAccessExtentCache extends ExtentDelegate {
private CachedBlock lastBlock;
/**
* Create a new instance.
*
* @param extent the extent
*/
public LastAccessExtentCache(Extent extent) {
super(extent);
}
@Override
public BaseBlock getLazyBlock(Vector position) {
BlockVector blockVector = position.toBlockVector();
CachedBlock lastBlock = this.lastBlock;
if (lastBlock != null && lastBlock.position.equals(blockVector)) {
return lastBlock.block;
} else {
BaseBlock block = super.getLazyBlock(position);
this.lastBlock = new CachedBlock(blockVector, block);
return block;
}
}
private static class CachedBlock {
private final BlockVector position;
private final BaseBlock block;
private CachedBlock(BlockVector position, BaseBlock block) {
this.position = position;
this.block = block;
}
}
}