org.h2.value

类 ValueBytes

java.lang.Object

org.h2.value.Value

org.h2.value.ValueBytes

直接已知子类:

ValueJavaObject

public class ValueBytes
extends Value

Implementation of the BINARY data type. It is also the base class for ValueJavaObject.

嵌套类概要

从类继承的嵌套类/接口 org.h2.value.Value

Value.ValueBlob, Value.ValueClob

字段概要

字段

限定符和类型	字段和说明
protected int	hash The hash code.
protected byte[]	value The value.

从类继承的字段 org.h2.value.Value

ARRAY, BLOB, BOOLEAN, BYTE, BYTES, CLOB, DATE, DECIMAL, DOUBLE, FLOAT, GEOMETRY, INT, JAVA_OBJECT, LONG, NULL, RESULT_SET, SHORT, STRING, STRING_FIXED, STRING_IGNORECASE, TIME, TIMESTAMP, TIMESTAMP_TZ, TYPE_COUNT, UNKNOWN, UUID

构造器概要

构造器

限定符	构造器和说明
protected	ValueBytes(byte[] v)

方法概要

限定符和类型	方法和说明
protected int	compareSecure(Value v, CompareMode mode) Compare the value with another value of the same type.
Value	convertPrecision(long precision, boolean force) Convert the precision to the requested value.
boolean	equals(Object other) Check if the two values have the same hash code.
static ValueBytes	get(byte[] b) Get or create a bytes value for the given byte array.
byte[]	getBytes()
byte[]	getBytesNoCopy()
int	getDisplaySize() Get the display size in characters.
int	getMemory() Get the memory used by this object.
static ValueBytes	getNoCopy(byte[] b) Get or create a bytes value for the given byte array.
Object	getObject() Get the value as an object.
long	getPrecision() Get the precision.
String	getSQL() Get the SQL expression for this value.
String	getString() Get the value as a string.
int	getType() Get the value type.
int	hashCode()
void	set(PreparedStatement prep, int parameterIndex) Set the value as a parameter in a prepared statement.

从类继承的方法 org.h2.value.Value

add, checkPrecision, clearCache, compareTo, compareTypeSafe, convertScale, convertTo, copy, copyToResult, copyToTemp, divide, getBigDecimal, getBoolean, getByte, getDataHandler, getDate, getDouble, getFloat, getHigherOrder, getInputStream, getInt, getLong, getReader, getResultSet, getScale, getShort, getSignum, getSmall, getTableId, getTime, getTimestamp, getTraceSQL, isLinkedToTable, modulus, multiply, negate, remove, subtract, throwUnsupportedExceptionForType, toString

从类继承的方法 java.lang.Object

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

字段详细资料

value

protected byte[] value

The value.

hash

protected int hash

The hash code.

构造器详细资料

ValueBytes

protected ValueBytes(byte[] v)

方法详细资料

get

public static ValueBytes get(byte[] b)

Get or create a bytes value for the given byte array. Clone the data.

参数:

b - the byte array

返回:

the value

getNoCopy

public static ValueBytes getNoCopy(byte[] b)

Get or create a bytes value for the given byte array. Do not clone the date.

参数:

b - the byte array

返回:

the value

getType

public int getType()

从类复制的说明: Value

Get the value type.

指定者:

getType 在类中 Value

返回:

the type

getSQL

public String getSQL()

从类复制的说明: Value

Get the SQL expression for this value.

指定者:

getSQL 在类中 Value

返回:

the SQL expression

getBytesNoCopy

public byte[] getBytesNoCopy()

覆盖:

getBytesNoCopy 在类中 Value

getBytes

public byte[] getBytes()

覆盖:

getBytes 在类中 Value

compareSecure

protected int compareSecure(Value v,
                            CompareMode mode)

从类复制的说明: Value

Compare the value with another value of the same type.

指定者:

compareSecure 在类中 Value

参数:

v - the other value

mode - the compare mode

返回:

0 if both values are equal, -1 if the other value is smaller, and 1 otherwise

getString

public String getString()

从类复制的说明: Value

Get the value as a string.

指定者:

getString 在类中 Value

返回:

the string

getPrecision

public long getPrecision()

从类复制的说明: Value

Get the precision.

指定者:

getPrecision 在类中 Value

返回:

the precision

hashCode

public int hashCode()

指定者:

hashCode 在类中 Value

getObject

public Object getObject()

从类复制的说明: Value

Get the value as an object.

指定者:

getObject 在类中 Value

返回:

the object

set

public void set(PreparedStatement prep,
                int parameterIndex)
         throws SQLException

从类复制的说明: Value

Set the value as a parameter in a prepared statement.

指定者:

set 在类中 Value

参数:

prep - the prepared statement

parameterIndex - the parameter index

抛出:

SQLException

getDisplaySize

public int getDisplaySize()

从类复制的说明: Value

Get the display size in characters.

指定者:

getDisplaySize 在类中 Value

返回:

the display size

getMemory

public int getMemory()

从类复制的说明: Value

Get the memory used by this object.

覆盖:

getMemory 在类中 Value

返回:

the memory used in bytes

equals

public boolean equals(Object other)

从类复制的说明: Value

Check if the two values have the same hash code. No data conversion is made; this method returns false if the other object is not of the same class. For some values, compareTo may return 0 even if equals return false. Example: ValueDecimal 0.0 and 0.00.

指定者:

equals 在类中 Value

参数:

other - the other value

返回:

true if they are equal

convertPrecision

public Value convertPrecision(long precision,
                              boolean force)

从类复制的说明: Value

Convert the precision to the requested value. The precision of the returned value may be somewhat larger than requested, because values with a fixed precision are not truncated.

覆盖:

convertPrecision 在类中 Value

参数:

precision - the new precision

force - true if losing numeric precision is allowed

返回:

the new value