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A module that is everything required to understands Druid Segments
/*
* 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.segment.incremental;
import org.apache.druid.data.input.impl.DimensionsSpec;
import org.apache.druid.data.input.impl.InputRowParser;
import org.apache.druid.data.input.impl.TimestampSpec;
import org.apache.druid.java.util.common.granularity.Granularities;
import org.apache.druid.java.util.common.granularity.Granularity;
import org.apache.druid.query.aggregation.AggregatorFactory;
import org.apache.druid.segment.VirtualColumns;
import javax.annotation.Nullable;
/**
*/
public class IncrementalIndexSchema
{
public static IncrementalIndexSchema.Builder builder()
{
return new Builder();
}
private final long minTimestamp;
private final TimestampSpec timestampSpec;
private final Granularity gran;
private final VirtualColumns virtualColumns;
private final DimensionsSpec dimensionsSpec;
private final AggregatorFactory[] metrics;
private final boolean rollup;
public IncrementalIndexSchema(
long minTimestamp,
TimestampSpec timestampSpec,
Granularity gran,
VirtualColumns virtualColumns,
DimensionsSpec dimensionsSpec,
AggregatorFactory[] metrics,
boolean rollup
)
{
this.minTimestamp = minTimestamp;
this.timestampSpec = timestampSpec;
this.gran = gran;
this.virtualColumns = VirtualColumns.nullToEmpty(virtualColumns);
this.dimensionsSpec = dimensionsSpec;
this.metrics = metrics;
this.rollup = rollup;
}
public long getMinTimestamp()
{
return minTimestamp;
}
public TimestampSpec getTimestampSpec()
{
return timestampSpec;
}
public Granularity getGran()
{
return gran;
}
public VirtualColumns getVirtualColumns()
{
return virtualColumns;
}
public DimensionsSpec getDimensionsSpec()
{
return dimensionsSpec;
}
public AggregatorFactory[] getMetrics()
{
return metrics;
}
public boolean isRollup()
{
return rollup;
}
public static class Builder
{
private long minTimestamp;
private TimestampSpec timestampSpec;
private Granularity gran;
private VirtualColumns virtualColumns;
private DimensionsSpec dimensionsSpec;
private AggregatorFactory[] metrics;
private boolean rollup;
public Builder()
{
this.minTimestamp = 0L;
this.gran = Granularities.NONE;
this.virtualColumns = VirtualColumns.EMPTY;
this.dimensionsSpec = DimensionsSpec.EMPTY;
this.metrics = new AggregatorFactory[]{};
this.rollup = true;
}
public Builder withMinTimestamp(long minTimestamp)
{
this.minTimestamp = minTimestamp;
return this;
}
public Builder withTimestampSpec(TimestampSpec timestampSpec)
{
this.timestampSpec = timestampSpec;
return this;
}
public Builder withQueryGranularity(Granularity gran)
{
this.gran = gran;
return this;
}
public Builder withVirtualColumns(VirtualColumns virtualColumns)
{
this.virtualColumns = virtualColumns;
return this;
}
public Builder withDimensionsSpec(@Nullable DimensionsSpec dimensionsSpec)
{
this.dimensionsSpec = dimensionsSpec == null ? DimensionsSpec.EMPTY : dimensionsSpec;
return this;
}
@Deprecated
public Builder withDimensionsSpec(@Nullable InputRowParser parser)
{
if (parser != null
&& parser.getParseSpec() != null
&& parser.getParseSpec().getDimensionsSpec() != null) {
this.dimensionsSpec = parser.getParseSpec().getDimensionsSpec();
} else {
this.dimensionsSpec = DimensionsSpec.EMPTY;
}
return this;
}
public Builder withMetrics(AggregatorFactory... metrics)
{
this.metrics = metrics;
return this;
}
public Builder withRollup(boolean rollup)
{
this.rollup = rollup;
return this;
}
public IncrementalIndexSchema build()
{
return new IncrementalIndexSchema(
minTimestamp,
timestampSpec,
gran,
virtualColumns,
dimensionsSpec,
metrics,
rollup
);
}
}
}