Package liquibase.snapshot.jvm

Class ColumnSnapshotGenerator

java.lang.Object

liquibase.snapshot.jvm.JdbcSnapshotGenerator

liquibase.snapshot.jvm.ColumnSnapshotGenerator

All Implemented Interfaces:

SnapshotGenerator

Direct Known Subclasses:

ColumnSnapshotGeneratorH2, ColumnSnapshotGeneratorInformix, ColumnSnapshotGeneratorOracle

public class ColumnSnapshotGenerator
extends JdbcSnapshotGenerator

Field Summary

Fields

Modifier and Type	Field	Description
protected static final String	COLUMN_DEF_COL

Fields inherited from interface liquibase.snapshot.SnapshotGenerator

PRIORITY_ADDITIONAL, PRIORITY_DATABASE, PRIORITY_DEFAULT, PRIORITY_NONE

Constructor Summary

Constructors

Constructor	Description
ColumnSnapshotGenerator()

Method Summary

Modifier and Type	Method	Description
protected void	addTo(DatabaseObject foundObject, DatabaseSnapshot snapshot)
protected Column	readColumn(CachedRow columnMetadataResultSet, Relation table, Database database)
protected DataType	readDataType(CachedRow columnMetadataResultSet, Column column, Database database)	Processes metadata of a column, e.g.
protected Object	readDefaultValue(CachedRow columnMetadataResultSet, Column columnInfo, Database database)
protected void	setAutoIncrementDetails(Column column, Database database, DatabaseSnapshot snapshot)
protected DatabaseObject	snapshotObject(DatabaseObject example, DatabaseSnapshot snapshot)

Methods inherited from class liquibase.snapshot.jvm.JdbcSnapshotGenerator

addStatusListener, addsTo, cleanNameFromDatabase, getDatabaseCatalogNames, getPriority, replaces, shouldAddTo, snapshot, updateListeners

Methods inherited from class java.lang.Object

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

Field Details

COLUMN_DEF_COL

protected static final String COLUMN_DEF_COL

See Also:

• Constant Field Values

Constructor Details

ColumnSnapshotGenerator

public ColumnSnapshotGenerator()

Method Details

snapshotObject

protected DatabaseObject snapshotObject(DatabaseObject example,
 DatabaseSnapshot snapshot)
                                 throws DatabaseException

Specified by:

snapshotObject in class JdbcSnapshotGenerator

Throws:

DatabaseException

addTo

protected void addTo(DatabaseObject foundObject,
 DatabaseSnapshot snapshot)
              throws DatabaseException

Specified by:

addTo in class JdbcSnapshotGenerator

Throws:

DatabaseException

setAutoIncrementDetails

protected void setAutoIncrementDetails(Column column,
 Database database,
 DatabaseSnapshot snapshot)

readColumn

protected Column readColumn(CachedRow columnMetadataResultSet,
 Relation table,
 Database database)
                     throws SQLException,
DatabaseException

Throws:

SQLException

DatabaseException

readDataType

protected DataType readDataType(CachedRow columnMetadataResultSet,
 Column column,
 Database database)
                         throws DatabaseException

Processes metadata of a column, e.g. name, type and default value. We start with the result of the JDBC DatabaseMetaData.getColumns() method. Depending on Database, additional columns might be present.

Parameters:

columnMetadataResultSet - the result from the JDBC getColumns() call for the column

column - logical definition of the column (object form)

database - the database from which the column originates

Returns:

a DataType object with detailed information about the type

Throws:

DatabaseException - If an error occurs during processing (mostly caused by Exceptions in JDBC calls)

readDefaultValue

protected Object readDefaultValue(CachedRow columnMetadataResultSet,
 Column columnInfo,
 Database database)