io.druid.query.groupby.orderby.NoopLimitSpec.java Source code

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Here is the source code for io.druid.query.groupby.orderby.NoopLimitSpec.java

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/*
 * Druid - a distributed column store.
 * Copyright 2012 - 2015 Metamarkets Group Inc.
 *
 * Licensed 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.google.common.base.Function;
import com.google.common.base.Functions;
import com.metamx.common.guava.Sequence;
import io.druid.data.input.Row;
import io.druid.query.aggregation.AggregatorFactory;
import io.druid.query.aggregation.PostAggregator;
import io.druid.query.dimension.DimensionSpec;

import java.util.List;

/**
 */
public class NoopLimitSpec implements LimitSpec {
    private static final byte CACHE_KEY = 0x0;

    @Override
    public Function<Sequence<Row>, Sequence<Row>> build(List<DimensionSpec> dimensions,
            List<AggregatorFactory> aggs, List<PostAggregator> 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 };
    }
}