gudusoft.gsqlparser.dlineage.dataflow.metadata

Class MetadataReader

Object

gudusoft.gsqlparser.dlineage.dataflow.metadata.MetadataReader

public class MetadataReader
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
static String	SHARDED_FORMAT The "sqlflow-sharded" manifest format tag.
static int	SUPPORTED_SHARDED_FORMAT_VERSION Highest sqlflow-sharded formatVersion this reader understands.
static int	UNSUPPORTED_SHARDED_VERSION Sentinel for a sqlflow-sharded manifest whose formatVersion is present but unusable (out of int range, non-integral, or non-numeric).

Constructor Summary

Constructors

Constructor and Description
MetadataReader()

Method Summary

Modifier and Type	Method and Description
static boolean	isGrabit(String metadata)
static boolean	isMetadata(String metadata)
static boolean	isSqlflow(String metadata) Check if the given metadata is in the old sqlflow format.
static boolean	isSqlflowSharded(String metadata)
static boolean	isSupportedSqlflowSharded(String metadata) True iff metadata is a sqlflow-sharded manifest whose formatVersion this reader supports (≤ SUPPORTED_SHARDED_FORMAT_VERSION).
static List<MetadataRelation>	read(String metadata)
static int	shardedFormatVersion(String metadata) The declared formatVersion of a sharded manifest, or 1 when the field is absent (v1 predates the field).

Methods inherited from class Object

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

Field Detail

SUPPORTED_SHARDED_FORMAT_VERSION

public static final int SUPPORTED_SHARDED_FORMAT_VERSION

Highest sqlflow-sharded formatVersion this reader understands. The exporter contract is additive within a major version, so a manifest at or below this is consumed; a higher one is refused rather than silently mis-parsed.

See Also:

Constant Field Values

SHARDED_FORMAT

public static final String SHARDED_FORMAT

The "sqlflow-sharded" manifest format tag.

See Also:

Constant Field Values

UNSUPPORTED_SHARDED_VERSION

public static final int UNSUPPORTED_SHARDED_VERSION

Sentinel for a sqlflow-sharded manifest whose formatVersion is present but unusable (out of int range, non-integral, or non-numeric). It never passes isSupportedSqlflowSharded(java.lang.String), so such a manifest is refused rather than silently accepted via a lossy conversion.

See Also:

Constant Field Values

Constructor Detail

MetadataReader

public MetadataReader()

Method Detail

shardedFormatVersion

public static int shardedFormatVersion(String metadata)

The declared formatVersion of a sharded manifest, or 1 when the field is absent (v1 predates the field). Returns -1 when metadata is not a sqlflow-sharded manifest at all, and UNSUPPORTED_SHARDED_VERSION when it IS a sharded manifest but the version field cannot be read as a supported integer.

isSupportedSqlflowSharded

public static boolean isSupportedSqlflowSharded(String metadata)

True iff metadata is a sqlflow-sharded manifest whose formatVersion this reader supports (≤ SUPPORTED_SHARDED_FORMAT_VERSION). A manifest with a higher version is a sqlflow-sharded manifest (isSqlflowSharded(java.lang.String) is still true) but is NOT supported — the caller must refuse it, not consume it as if it were the supported version.

read

public static List<MetadataRelation> read(String metadata)

isMetadata

public static boolean isMetadata(String metadata)

isGrabit

public static boolean isGrabit(String metadata)

isSqlflow

public static boolean isSqlflow(String metadata)

Check if the given metadata is in the old sqlflow format.

The old sqlflow format has no format key and identifies itself via createdBy containing "sqlflow". This is distinct from the newer sqlflow-sharded format, which has format: "sqlflow-sharded".

Data structure: servers[].queries[] — queries are nested under servers, not at the root level.

Parameters:

metadata - the JSON string to check

Returns:

true if the metadata is in the old sqlflow format

isSqlflowSharded

public static boolean isSqlflowSharded(String metadata)