org.apache.druid.query.groupby.orderby.NoopLimitSpec.java Source code

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

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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 org.apache.druid.query.groupby.orderby;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.google.common.base.Function;
import com.google.common.base.Functions;
import org.apache.druid.data.input.Row;
import org.apache.druid.java.util.common.granularity.Granularity;
import org.apache.druid.java.util.common.guava.Sequence;
import org.apache.druid.query.aggregation.AggregatorFactory;
import org.apache.druid.query.aggregation.PostAggregator;
import org.apache.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<Row>, Sequence<Row>> build(List<DimensionSpec> dimensions,
            List<AggregatorFactory> aggs, List<PostAggregator> postAggs, Granularity granularity,
            boolean sortByDimsFirst) {
        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 };
    }
}