org.h2.value

类 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.

字段概要

字段

限定符和类型	字段和说明
static Class<?>	GEOMETRY_CLASS The Geometry class.

从类继承的字段 org.h2.message.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

方法概要

限定符和类型	方法和说明
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.
static Value	readValue(Session session, JdbcResultSet rs, int columnIndex) Read a value from the given result set.
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.

从类继承的方法 org.h2.message.TraceObject

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

从类继承的方法 java.lang.Object

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

字段详细资料

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.

方法详细资料

objectToValue

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

Convert a Java object to a value.

参数:

session - the session

x - the value

type - the suggested value type, or Value#UNKNOWN

返回:

the value

valueToObject

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

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

类型参数:

T - the type

参数:

type - the class

value - the value

conn - the connection

返回:

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

getDefaultClass

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

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

参数:

type - the value type

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

返回:

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.

参数:

value - the value

conn - the connection

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

返回:

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.

参数:

value - the array value

conn - the connection

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

返回:

the object

readValue

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

Read a value from the given result set.

参数:

session - the session

rs - the result set

columnIndex - the column index (1-based)

返回:

the value