Package org.apache.drill.exec.store.dfs

Class FormatMatcher

java.lang.Object

org.apache.drill.exec.store.dfs.FormatMatcher

Direct Known Subclasses:

BasicFormatMatcher, DeltaFormatMatcher, IcebergFormatMatcher

public abstract class FormatMatcher
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static final int	HIGH_PRIORITY
static final int	MEDIUM_PRIORITY

Constructor Summary

Constructors

Constructor	Description
FormatMatcher()

Method Summary

Modifier and Type	Method	Description
FormatLocationTransformer	getFormatLocationTransformer()	Returns FormatLocationTransformer instance relevant for {@link this} format matcher.
abstract FormatPlugin	getFormatPlugin()
abstract boolean	isFileReadable(DrillFileSystem fs, org.apache.hadoop.fs.FileStatus status)
abstract DrillTable	isReadable(DrillFileSystem fs, FileSelection selection, FileSystemPlugin fsPlugin, String storageEngineName, SchemaConfig schemaConfig)
int	priority()	Priority of specific format matcher to be applied.
abstract boolean	supportDirectoryReads()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

MEDIUM_PRIORITY

public static final int MEDIUM_PRIORITY

See Also:

• Constant Field Values

HIGH_PRIORITY

public static final int HIGH_PRIORITY

See Also:

• Constant Field Values

Constructor Details

FormatMatcher

public FormatMatcher()

Method Details

supportDirectoryReads

public abstract boolean supportDirectoryReads()

isReadable

public abstract DrillTable isReadable(DrillFileSystem fs,
 FileSelection selection,
 FileSystemPlugin fsPlugin,
 String storageEngineName,
 SchemaConfig schemaConfig)
                               throws IOException

Throws:

IOException

isFileReadable

public abstract boolean isFileReadable(DrillFileSystem fs,
 org.apache.hadoop.fs.FileStatus status)
                                throws IOException

Throws:

IOException

getFormatPlugin

public abstract FormatPlugin getFormatPlugin()

priority

public int priority()

Priority of specific format matcher to be applied. Can be used for the case when several formats can match the format, but matchers with some more specific requirements should be applied at first.

Returns:

priority of {@link this} format matcher.

getFormatLocationTransformer

public FormatLocationTransformer getFormatLocationTransformer()

Returns FormatLocationTransformer instance relevant for {@link this} format matcher.

Returns:

FormatLocationTransformer instance