Class ValueToObjectConverter

java.lang.Object

org.h2.message.TraceObject

org.h2.value.ValueToObjectConverter

public final class ValueToObjectConverter
extends TraceObject

Data type conversion methods between values and Java objects.

Field Summary

Fields

Modifier and Type	Field	Description
static final Class<?>	GEOMETRY_CLASS	The Geometry class.
private static final String	GEOMETRY_CLASS_NAME

Fields inherited from class TraceObject

ARRAY, BLOB, CALLABLE_STATEMENT, CLOB, CONNECTION, DATA_SOURCE, DATABASE_META_DATA, PARAMETER_META_DATA, PREPARED_STATEMENT, RESULT_SET, RESULT_SET_META_DATA, SAVEPOINT, SQLXML, STATEMENT, trace, XA_DATA_SOURCE, XID

Constructor Summary

Constructors

Modifier	Constructor	Description
private	ValueToObjectConverter()

Method Summary

Modifier and Type	Method	Description
private static Value	arrayToValue(Session session, Object x)
static Class<?>	getDefaultClass(int type, boolean forJdbc)	Get the name of the Java class for the given value type.
static Value	objectToValue(Session session, Object x, int type)	Convert a Java object to a value.
private static Value	otherToValue(Session session, Object x)
private static LinkedHashMap<String,TypeInfo>	readResultSetMeta(Session session, ResultSetMetaData meta, int columnCount)
static Value	readValue(Session session, JdbcResultSet rs, int columnIndex)	Read a value from the given result set.
(package private) static Value	resultSetToValue(Session session, ResultSet rs)
private static Object	valueToArray(Class<?> type, Value value, JdbcConnection conn)
static Object	valueToDefaultArray(Value value, JdbcConnection conn, boolean forJdbc)	Converts the specified array value to array of default Java objects for its type.
static Object	valueToDefaultObject(Value value, JdbcConnection conn, boolean forJdbc)	Converts the specified value to the default Java object for its type.
static <T> T	valueToObject(Class<T> type, Value value, JdbcConnection conn)	Converts the specified value to an object of the specified type.
private static Object	valueToOther(Class<?> type, Value value, JdbcConnection conn)

Methods inherited from class TraceObject

debugCode, debugCodeAssign, debugCodeCall, debugCodeCall, debugCodeCall, getNextId, getTraceId, getTraceObjectName, isDebugEnabled, isInfoEnabled, logAndConvert, quote, quoteArray, quoteBigDecimal, quoteBytes, quoteDate, quoteIntArray, quoteMap, quoteTime, quoteTimestamp, setTrace, unsupported

Methods inherited from class Object

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

Field Details

GEOMETRY_CLASS

public static final Class<?> GEOMETRY_CLASS

The Geometry class. This object is null if the JTS jar file is not in the classpath.

GEOMETRY_CLASS_NAME

private static final String GEOMETRY_CLASS_NAME

See Also:

• Constant Field Values

Constructor Details

ValueToObjectConverter

private ValueToObjectConverter()

Method Details

objectToValue

public static Value objectToValue(Session session,
 Object x,
 int type)

Convert a Java object to a value.

Parameters:

session - the session

x - the value

type - the suggested value type, or Value#UNKNOWN

Returns:

the value

otherToValue

private static Value otherToValue(Session session,
 Object x)

arrayToValue

private static Value arrayToValue(Session session,
 Object x)

resultSetToValue

static Value resultSetToValue(Session session,
 ResultSet rs)

readResultSetMeta

private static LinkedHashMap<String,TypeInfo> readResultSetMeta(Session session,
 ResultSetMetaData meta,
 int columnCount)
                                                         throws SQLException

Throws:

SQLException

valueToObject

public static <T> T valueToObject(Class<T> type,
 Value value,
 JdbcConnection conn)

Converts the specified value to an object of the specified type.

Type Parameters:

T - the type

Parameters:

type - the class

value - the value

conn - the connection

Returns:

the object of the specified class representing the specified value, or null

valueToArray

private static Object valueToArray(Class<?> type,
 Value value,
 JdbcConnection conn)

valueToOther

private static Object valueToOther(Class<?> type,
 Value value,
 JdbcConnection conn)

getDefaultClass

public static Class<?> getDefaultClass(int type,
 boolean forJdbc)

Get the name of the Java class for the given value type.

Parameters:

type - the value type

forJdbc - if true get class for JDBC layer, if false get class for Java functions API

Returns:

the class

valueToDefaultObject

public static Object valueToDefaultObject(Value value,
 JdbcConnection conn,
 boolean forJdbc)

Converts the specified value to the default Java object for its type.

Parameters:

value - the value

conn - the connection

forJdbc - if true perform conversion for JDBC layer, if false perform conversion for Java functions API

Returns:

the object

valueToDefaultArray

public static Object valueToDefaultArray(Value value,
 JdbcConnection conn,
 boolean forJdbc)

Converts the specified array value to array of default Java objects for its type.

Parameters:

value - the array value

conn - the connection

forJdbc - if true perform conversion for JDBC layer, if false perform conversion for Java functions API

Returns:

the object

readValue

public static Value readValue(Session session,
 JdbcResultSet rs,
 int columnIndex)

Read a value from the given result set.

Parameters:

session - the session

rs - the result set

columnIndex - the column index (1-based)

Returns:

the value