org.apache.druid.query.spec.MultipleSpecificSegmentSpec.java Source code

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Here is the source code for org.apache.druid.query.spec.MultipleSpecificSegmentSpec.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.spec;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.base.Function;
import com.google.common.collect.Iterables;
import org.apache.druid.java.util.common.JodaUtils;
import org.apache.druid.query.Query;
import org.apache.druid.query.QueryRunner;
import org.apache.druid.query.QuerySegmentWalker;
import org.apache.druid.query.SegmentDescriptor;
import org.joda.time.Interval;

import java.util.List;

/**
 */
public class MultipleSpecificSegmentSpec implements QuerySegmentSpec {
    private final List<SegmentDescriptor> descriptors;

    private volatile List<Interval> intervals = null;

    @JsonCreator
    public MultipleSpecificSegmentSpec(@JsonProperty("segments") List<SegmentDescriptor> descriptors) {
        this.descriptors = descriptors;
    }

    @JsonProperty("segments")
    public List<SegmentDescriptor> getDescriptors() {
        return descriptors;
    }

    @Override
    public List<Interval> getIntervals() {
        if (intervals != null) {
            return intervals;
        }

        intervals = JodaUtils
                .condenseIntervals(Iterables.transform(descriptors, new Function<SegmentDescriptor, Interval>() {
                    @Override
                    public Interval apply(SegmentDescriptor input) {
                        return input.getInterval();
                    }
                }));

        return intervals;
    }

    @Override
    public <T> QueryRunner<T> lookup(Query<T> query, QuerySegmentWalker walker) {
        return walker.getQueryRunnerForSegments(query, descriptors);
    }

    @Override
    public String toString() {
        return "MultipleSpecificSegmentSpec{" + "descriptors=" + descriptors + '}';
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }

        MultipleSpecificSegmentSpec that = (MultipleSpecificSegmentSpec) o;

        if (descriptors != null ? !descriptors.equals(that.descriptors) : that.descriptors != null) {
            return false;
        }
        if (intervals != null ? !intervals.equals(that.intervals) : that.intervals != null) {
            return false;
        }

        return true;
    }

    @Override
    public int hashCode() {
        int result = descriptors != null ? descriptors.hashCode() : 0;
        result = 31 * result + (intervals != null ? intervals.hashCode() : 0);
        return result;
    }
}