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presto-orc/src/main/java/io/prestosql/orc/MemoryOrcDataSource.java
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|---|---|---|
| @@ -0,0 +1,102 @@ | ||
| /* | ||
| * 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.prestosql.orc; | ||
|
|
||
| import com.google.common.collect.ImmutableMap; | ||
| import io.airlift.slice.Slice; | ||
| import io.prestosql.orc.stream.MemoryOrcDataReader; | ||
| import io.prestosql.orc.stream.OrcDataReader; | ||
|
|
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| import java.util.Map; | ||
| import java.util.Map.Entry; | ||
|
|
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| import static java.lang.Math.toIntExact; | ||
| import static java.util.Objects.requireNonNull; | ||
|
|
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| public class MemoryOrcDataSource | ||
| implements OrcDataSource | ||
| { | ||
| private final OrcDataSourceId id; | ||
| private final Slice data; | ||
| private long readBytes; | ||
|
|
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| public MemoryOrcDataSource(OrcDataSourceId id, Slice data) | ||
| { | ||
| this.id = requireNonNull(id, "id is null"); | ||
| this.data = requireNonNull(data, "data is null"); | ||
| } | ||
|
|
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| @Override | ||
| public OrcDataSourceId getId() | ||
| { | ||
| return id; | ||
| } | ||
|
|
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| @Override | ||
| public long getReadBytes() | ||
| { | ||
| return readBytes; | ||
| } | ||
|
|
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| @Override | ||
| public long getReadTimeNanos() | ||
| { | ||
| return 0; | ||
| } | ||
|
|
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| @Override | ||
| public final long getSize() | ||
| { | ||
| return data.length(); | ||
| } | ||
|
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| @Override | ||
| public long getRetainedSize() | ||
| { | ||
| return data.getRetainedSize(); | ||
| } | ||
|
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| @Override | ||
| public final Slice readFully(long position, int length) | ||
| { | ||
| readBytes += length; | ||
| return data.slice(toIntExact(position), length); | ||
| } | ||
|
|
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| @Override | ||
| public final <K> Map<K, OrcDataReader> readFully(Map<K, DiskRange> diskRanges) | ||
| { | ||
| requireNonNull(diskRanges, "diskRanges is null"); | ||
|
|
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| if (diskRanges.isEmpty()) { | ||
| return ImmutableMap.of(); | ||
| } | ||
|
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| ImmutableMap.Builder<K, OrcDataReader> slices = ImmutableMap.builder(); | ||
| for (Entry<K, DiskRange> entry : diskRanges.entrySet()) { | ||
| DiskRange diskRange = entry.getValue(); | ||
| Slice slice = readFully(diskRange.getOffset(), diskRange.getLength()); | ||
| // retained memory is reported by this data source, so it should not be declared in the reader | ||
| slices.put(entry.getKey(), new MemoryOrcDataReader(id, slice, 0)); | ||
| } | ||
|
|
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| return slices.build(); | ||
| } | ||
|
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| @Override | ||
| public final String toString() | ||
| { | ||
| return id.toString(); | ||
| } | ||
| } |
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