
com.facebook.presto.orc.StreamDescriptor Maven / Gradle / Ivy
/*
* 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 com.facebook.presto.orc;
import com.facebook.presto.orc.StreamDescriptorFactory.AllStreams;
import com.facebook.presto.orc.StreamDescriptorFactory.StreamProperty;
import com.facebook.presto.orc.metadata.OrcType;
import com.facebook.presto.orc.metadata.OrcType.OrcTypeKind;
import com.google.common.collect.ImmutableList;
import java.util.List;
import static com.facebook.presto.orc.metadata.ColumnEncoding.DEFAULT_SEQUENCE_ID;
import static com.google.common.base.MoreObjects.toStringHelper;
import static java.util.Objects.requireNonNull;
public final class StreamDescriptor
{
private final AllStreams allStreams;
private final int streamId;
private final int sequence;
public StreamDescriptor(int streamId, AllStreams allStreams)
{
this(streamId, DEFAULT_SEQUENCE_ID, allStreams);
}
public StreamDescriptor(int streamId, int sequence, AllStreams allStreams)
{
this.streamId = streamId;
this.sequence = sequence;
this.allStreams = requireNonNull(allStreams, "allStreams is null");
}
public StreamDescriptor duplicate(int sequence)
{
return new StreamDescriptor(streamId, sequence, allStreams);
}
public String getStreamName()
{
return getStreamProperty().getStreamName();
}
public int getStreamId()
{
return streamId;
}
public int getSequence()
{
return sequence;
}
public OrcTypeKind getOrcTypeKind()
{
return getOrcType().getOrcTypeKind();
}
public OrcType getOrcType()
{
return getStreamProperty().getOrcType();
}
public String getFieldName()
{
return getStreamProperty().getFieldName();
}
public OrcDataSourceId getOrcDataSourceId()
{
return getOrcDataSource().getId();
}
public OrcDataSource getOrcDataSource()
{
return allStreams.getOrcDataSource();
}
public List getNestedStreams()
{
List nestedStreamIds = getStreamProperty().getNestedStreamIds();
if (nestedStreamIds.isEmpty()) {
return ImmutableList.of();
}
ImmutableList.Builder nestedStreamsBuilder = ImmutableList.builderWithExpectedSize(nestedStreamIds.size());
for (int nestedStreamId : nestedStreamIds) {
nestedStreamsBuilder.add(new StreamDescriptor(nestedStreamId, sequence, allStreams));
}
return nestedStreamsBuilder.build();
}
private StreamProperty getStreamProperty()
{
return allStreams.getStreamProperty(streamId);
}
@Override
public String toString()
{
return toStringHelper(this)
.add("streamName", getStreamName())
.add("streamId", streamId)
.add("sequence", sequence)
.add("orcType", getOrcType())
.add("dataSource", getOrcDataSourceId())
.toString();
}
}
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