org.datanucleus.store.rdbms.schema
Class SQLTypeInfo

java.lang.Object
  org.datanucleus.store.rdbms.schema.SQLTypeInfo

All Implemented Interfaces:

org.datanucleus.store.schema.StoreSchemaData

Direct Known Subclasses:

DB2TypeInfo, DerbyTypeInfo, FirebirdTypeInfo, H2TypeInfo, HSQLTypeInfo, InformixTypeInfo, McKoiTypeInfo, MSSQLTypeInfo, MySQLTypeInfo, OracleTypeInfo, PostgresqlTypeInfo, SQLiteTypeInfo

public class SQLTypeInfo
extends Object
implements org.datanucleus.store.schema.StoreSchemaData

Representation of SQL type information in the datastore.

Field Summary

protected boolean	allowsPrecisionSpec Whether the type allows specification of the precision in parentheses after the type name.
protected boolean	autoIncrement Whether the type automatically increments for each new row inserted.
protected boolean	caseSensitive Whether the data type is case-sensitive in comparisons.
protected String	createParams Indicates the parameters used in defining columns of this type.
protected short	dataType The JDBC data type number of this data type (see java.sql.Types).
protected boolean	fixedPrecScale Whether the type can be assigned a fixed scale value, such as for decimal or currency types.
protected String	literalPrefix The prefix used to quote a literal of this data type; may be null.
protected String	literalSuffix The suffix used to quote a literal of this data type; may be null.
protected String	localTypeName Localized version of the DBMS-specific type name of this data type.
protected short	maximumScale The maximum supported scale value for this data type.
protected short	minimumScale The minimum supported scale value for this data type.
protected int	nullable Indicates whether null values are allowed for this data type.
protected int	numPrecRadix Indicates the numeric radix of this data type, which is usually 2 or 10.
protected int	precision The maximum precision/length allowed for this data type.
protected short	searchable The searchability of this data type in terms of the kinds of SQL WHERE clauses that are allowed.
protected String	typeName The RDBMS-specific name for this data type.
protected boolean	unsignedAttribute true indicates the type is unsigned, false otherwise.

Constructor Summary

SQLTypeInfo(ResultSet rs)
Constructor to create a type info definition for the current row of the passed ResultSet.

SQLTypeInfo(String typeName, short dataType, int precision, String literalPrefix, String literalSuffix, String createParams, int nullable, boolean caseSensitive, short searchable, boolean unsignedAttribute, boolean fixedPrecScale, boolean autoIncrement, String localTypeName, short minimumScale, short maximumScale, int numPrecRadix)
Constructor to create a type info definition from the passed values.

Method Summary

void	addProperty(String name, Object value) Method to add a property for the type.
boolean	equals(Object obj) Indicates whether some object is "equal to" this one.
String	getCreateParams()
short	getDataType()
String	getLiteralPrefix()
String	getLiteralSuffix()
String	getLocalTypeName()
short	getMaximumScale()
short	getMinimumScale()
int	getNullable()
int	getNumPrecRadix()
int	getPrecision()
Object	getProperty(String name) Accessor for a property.
short	getSearchable()
String	getTypeName()
int	hashCode() Returns a hash code value for this object.
boolean	isAllowsPrecisionSpec()
boolean	isAutoIncrement()
boolean	isCaseSensitive()
boolean	isCompatibleWith(RDBMSColumnInfo colInfo) Convenience method for returning if this type is compatible with the provided column.
boolean	isFixedPrecScale()
boolean	isUnsignedAttribute()
void	setAllowsPrecisionSpec(boolean allowsPrecisionSpec)
void	setLocalTypeName(String localTypeName)
void	setTypeName(String typeName)
String	toString() Returns the string representation of this object.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

typeName

protected String typeName

The RDBMS-specific name for this data type.

dataType

protected short dataType

The JDBC data type number of this data type (see java.sql.Types).

precision

protected int precision

The maximum precision/length allowed for this data type.

literalPrefix

protected String literalPrefix

The prefix used to quote a literal of this data type; may be null.

literalSuffix

protected String literalSuffix

The suffix used to quote a literal of this data type; may be null.

createParams

protected String createParams

Indicates the parameters used in defining columns of this type.

nullable

protected int nullable

Indicates whether null values are allowed for this data type.

caseSensitive

protected boolean caseSensitive

Whether the data type is case-sensitive in comparisons.

searchable

protected short searchable

The searchability of this data type in terms of the kinds of SQL WHERE clauses that are allowed.

unsignedAttribute

protected boolean unsignedAttribute

true indicates the type is unsigned, false otherwise.

fixedPrecScale

protected boolean fixedPrecScale

Whether the type can be assigned a fixed scale value, such as for decimal or currency types.

autoIncrement

protected boolean autoIncrement

Whether the type automatically increments for each new row inserted.

localTypeName

protected String localTypeName

Localized version of the DBMS-specific type name of this data type.

minimumScale

protected short minimumScale

The minimum supported scale value for this data type.

maximumScale

protected short maximumScale

The maximum supported scale value for this data type.

numPrecRadix

protected int numPrecRadix

Indicates the numeric radix of this data type, which is usually 2 or 10.

allowsPrecisionSpec

protected boolean allowsPrecisionSpec

Whether the type allows specification of the precision in parentheses after the type name.

Constructor Detail

SQLTypeInfo

public SQLTypeInfo(String typeName,
                   short dataType,
                   int precision,
                   String literalPrefix,
                   String literalSuffix,
                   String createParams,
                   int nullable,
                   boolean caseSensitive,
                   short searchable,
                   boolean unsignedAttribute,
                   boolean fixedPrecScale,
                   boolean autoIncrement,
                   String localTypeName,
                   short minimumScale,
                   short maximumScale,
                   int numPrecRadix)

Constructor to create a type info definition from the passed values.

SQLTypeInfo

public SQLTypeInfo(ResultSet rs)

Constructor to create a type info definition for the current row of the passed ResultSet.

Parameters:

rs - ResultSet (from DatabaseMetaData.getTypeInfo() for example).

Throws:

org.datanucleus.exceptions.NucleusDataStoreException - Thrown if an error occurs getting the information

Method Detail

addProperty

public void addProperty(String name,
                        Object value)

Method to add a property for the type.

Specified by:

addProperty in interface org.datanucleus.store.schema.StoreSchemaData

Parameters:

name - Name of property

value - Its value

getProperty

public Object getProperty(String name)

Accessor for a property.

Specified by:

getProperty in interface org.datanucleus.store.schema.StoreSchemaData

Parameters:

name - Name of the property

Returns:

Its value, or null if not defined

equals

public final boolean equals(Object obj)

Indicates whether some object is "equal to" this one. Two SQLTypeInfo are considered equal if their type name and data type properties are equal.

Overrides:

equals in class Object

Parameters:

obj - the reference object with which to compare

Returns:

true if this object is equal to the obj argument; false otherwise.

hashCode

public final int hashCode()

Returns a hash code value for this object.

Overrides:

hashCode in class Object

Returns:

a hash code value for this object.

toString

public String toString()

Returns the string representation of this object.

Overrides:

toString in class Object

Returns:

string representation of this object.

isCompatibleWith

public boolean isCompatibleWith(RDBMSColumnInfo colInfo)

Convenience method for returning if this type is compatible with the provided column. Compares the data type of each record, and returns true if the types are equivalent. For example one could be VARCHAR, and the other LONGVARCHAR so they both store string data, and hence they are compatible.

Parameters:

colInfo - The column

Returns:

Whether they are considered compatible

setTypeName

public void setTypeName(String typeName)

getTypeName

public String getTypeName()

getDataType

public short getDataType()

getPrecision

public int getPrecision()

getLiteralPrefix

public String getLiteralPrefix()

getLiteralSuffix

public String getLiteralSuffix()

getCreateParams

public String getCreateParams()

getNullable

public int getNullable()

isCaseSensitive

public boolean isCaseSensitive()

getSearchable

public short getSearchable()

isUnsignedAttribute

public boolean isUnsignedAttribute()

isFixedPrecScale

public boolean isFixedPrecScale()

isAutoIncrement

public boolean isAutoIncrement()

setLocalTypeName

public void setLocalTypeName(String localTypeName)

getLocalTypeName

public String getLocalTypeName()

getMinimumScale

public short getMinimumScale()

getMaximumScale

public short getMaximumScale()

getNumPrecRadix

public int getNumPrecRadix()

setAllowsPrecisionSpec

public void setAllowsPrecisionSpec(boolean allowsPrecisionSpec)

isAllowsPrecisionSpec

public boolean isAllowsPrecisionSpec()