io.druid.query.groupby.orderby.NoopLimitSpec 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.query.groupby.orderby;
import com.fasterxml.jackson.annotation.JsonCreator;
import com.google.common.base.Function;
import com.google.common.base.Functions;
import io.druid.data.input.Row;
import io.druid.java.util.common.guava.Sequence;
import io.druid.query.aggregation.AggregatorFactory;
import io.druid.query.aggregation.PostAggregator;
import io.druid.query.dimension.DimensionSpec;
import java.util.List;
/**
*/
public final class NoopLimitSpec implements LimitSpec
{
private static final byte CACHE_KEY = 0x0;
public static final NoopLimitSpec INSTANCE = new NoopLimitSpec();
@JsonCreator
public static NoopLimitSpec instance()
{
return INSTANCE;
}
private NoopLimitSpec()
{
}
@Override
public Function, Sequence> build(
List dimensions,
List aggs,
List postAggs
)
{
return Functions.identity();
}
@Override
public LimitSpec merge(LimitSpec other)
{
return other;
}
@Override
public String toString()
{
return "NoopLimitSpec";
}
@Override
public boolean equals(Object other)
{
return (other instanceof NoopLimitSpec);
}
@Override
public int hashCode()
{
return 0;
}
@Override
public byte[] getCacheKey()
{
return new byte[]{CACHE_KEY};
}
}