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Implement native in filter (Fix for apache#2577)
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80 changes: 80 additions & 0 deletions
80
processing/src/main/java/io/druid/segment/filter/InFilter.java
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|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
|
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| package io.druid.segment.filter; | ||
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| import com.google.common.base.Function; | ||
| import com.google.common.base.Predicate; | ||
| import com.google.common.base.Strings; | ||
| import com.google.common.collect.Iterables; | ||
| import com.metamx.collections.bitmap.BitmapFactory; | ||
| import com.metamx.collections.bitmap.ImmutableBitmap; | ||
| import io.druid.query.filter.BitmapIndexSelector; | ||
| import io.druid.query.filter.Filter; | ||
| import io.druid.query.filter.ValueMatcher; | ||
| import io.druid.query.filter.ValueMatcherFactory; | ||
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| import javax.annotation.Nullable; | ||
| import java.util.Set; | ||
|
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| /** | ||
| */ | ||
| public class InFilter implements Filter | ||
| { | ||
| private final String dimension; | ||
| private final Set<String> values; | ||
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| public InFilter(String dimension, Set<String> values) | ||
| { | ||
| this.dimension = dimension; | ||
| this.values = values; | ||
| } | ||
|
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| @Override | ||
| public ImmutableBitmap getBitmapIndex(final BitmapIndexSelector selector) | ||
| { | ||
| return selector.getBitmapFactory().union( | ||
| Iterables.transform( | ||
| values, new Function<String, ImmutableBitmap>() | ||
| { | ||
| @Override | ||
| public ImmutableBitmap apply(String value) | ||
| { | ||
| return selector.getBitmapIndex(dimension, value); | ||
| } | ||
| } | ||
| ) | ||
| ); | ||
| } | ||
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| @Override | ||
| public ValueMatcher makeMatcher(ValueMatcherFactory factory) | ||
| { | ||
| return factory.makeValueMatcher( | ||
| dimension, new Predicate<String>() | ||
| { | ||
| @Override | ||
| public boolean apply(String input) | ||
| { | ||
| return values.contains(Strings.nullToEmpty(input)); | ||
| } | ||
| } | ||
| ); | ||
| } | ||
| } |
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