io.druid.collections.bitmap.BitSetBitmapFactory Maven / Gradle / Ivy
/*
* Licensed to Metamarkets Group Inc. (Metamarkets) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Metamarkets 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.
*/
package io.druid.collections.bitmap;
import java.nio.ByteBuffer;
import java.util.BitSet;
/**
* BitSetBitmapFactory implements BitmapFactory as a wrapper for java.util.BitSet
*/
public class BitSetBitmapFactory implements BitmapFactory
{
@Override
public MutableBitmap makeEmptyMutableBitmap()
{
return new WrappedBitSetBitmap();
}
@Override
public ImmutableBitmap makeEmptyImmutableBitmap()
{
return makeEmptyMutableBitmap();
}
@Override
public ImmutableBitmap makeImmutableBitmap(MutableBitmap mutableBitmap)
{
return mutableBitmap;
}
@Override
public ImmutableBitmap mapImmutableBitmap(ByteBuffer b)
{
return new WrappedBitSetBitmap(BitSet.valueOf(b.array()));
}
@Override
public ImmutableBitmap union(Iterable b)
{
WrappedBitSetBitmap newSet = null;
for (ImmutableBitmap bm : b) {
if (null == newSet) {
newSet = new WrappedBitSetBitmap(((WrappedBitSetBitmap) bm).cloneBitSet());
} else {
newSet.union(bm);
}
}
return newSet;
}
@Override
public ImmutableBitmap intersection(Iterable b)
{
WrappedBitSetBitmap newSet = null;
for (ImmutableBitmap bm : b) {
if (null == newSet) {
newSet = new WrappedBitSetBitmap(((WrappedBitSetBitmap) bm).cloneBitSet());
} else {
newSet.intersection(bm);
}
}
return newSet;
}
@Override
public ImmutableBitmap complement(ImmutableBitmap b)
{
BitSet bitSet = ((WrappedBitSetBitmap) b).cloneBitSet();
bitSet.flip(0, bitSet.size());
return new WrappedBitSetBitmap(bitSet);
}
@Override
public ImmutableBitmap complement(
ImmutableBitmap b, int length
)
{
return null;
}
}