ColumnValue (AliCloud TableStore SDK for Java 5.17.6 API)

java.lang.Object
- com.alicloud.openservices.tablestore.model.ColumnValue

所有已实现的接口:

Jsonizable, Measurable, Comparable<ColumnValue>
```
public class ColumnValue
extends Object
implements Comparable<ColumnValue>, Jsonizable, Measurable
```
Represents the value of an attribute column.

字段概要

字段
限定符和类型字段和说明

static ColumnValue INTERNAL_NULL_VALUE
For internal use only.

字段
限定符和类型	字段和说明
`static ColumnValue`	`INTERNAL_NULL_VALUE` For internal use only.

构造器概要

构造器
构造器和说明

ColumnValue(Object value, ColumnType type)

构造器
构造器和说明
`ColumnValue(Object value, ColumnType type)`

方法概要

所有方法静态方法实例方法具体方法
限定符和类型	方法和说明
`byte[]`	`asBinary()` Get the value of the attribute column as a binary string.
`boolean`	`asBoolean()` Get the boolean value of the attribute column.
`double`	`asDouble()` Get the value of the attribute column with DOUBLE type.
`long`	`asLong()` Get the long integer value of the attribute column.
`String`	`asString()` Get the string value of the attribute column.
`byte[]`	`asStringInBytes()`
`int`	`compareTo(ColumnValue target)` Compare the values of two property columns.
`boolean`	`equals(Object o)`
`static ColumnValue`	`fromBinary(byte[] value)` Constructs a property column of type `ColumnType.BINARY`.
`static ColumnValue`	`fromBoolean(boolean value)` Constructs a property column of type `ColumnType.BOOLEAN`.
`static ColumnValue`	`fromDouble(double value)` Constructs a property column of type `ColumnType.DOUBLE`.
`static ColumnValue`	`fromLong(long value)` Constructs a property column of type `ColumnType.INTEGER`.
`static ColumnValue`	`fromString(String value)` Construct an attribute column of type `ColumnType.STRING`.
`byte`	`getChecksum(byte crc)` Get a checksum using the crc8 algorithm, mainly used to calculate the checksum of a cell
`int`	`getDataSize()` Get the size of the primary key column value, the size calculation formula for each type is as follows: - `ColumnType.INTEGER`: Constant size of 8 bytes - `ColumnType.DOUBLE`: Constant size of 8 bytes - `ColumnType.BOOLEAN`: Constant size of 1 byte - `ColumnType.BINARY`: Size equals the number of bytes - `ColumnType.STRING`: Size equals the number of bytes after UTF-8 encoding
`ColumnType`	`getType()` Get the type of the attribute column.
`Object`	`getValue()`
`int`	`hashCode()`
`String`	`jsonize()`
`void`	`jsonize(StringBuilder sb, String newline)`
`String`	`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
  - INTERNAL_NULL_VALUE
```
public static ColumnValue INTERNAL_NULL_VALUE
```
    For internal use only. Do not use it.
- 构造器详细资料
  - ColumnValue
```
public ColumnValue(Object value,
                   ColumnType type)
```
- 方法详细资料
  - getValue
```
public Object getValue()
```
  - getDataSize
```
public int getDataSize()
```
    Get the size of the primary key column value, the size calculation formula for each type is as follows: - ColumnType.INTEGER: Constant size of 8 bytes - ColumnType.DOUBLE: Constant size of 8 bytes - ColumnType.BOOLEAN: Constant size of 1 byte - ColumnType.BINARY: Size equals the number of bytes - ColumnType.STRING: Size equals the number of bytes after UTF-8 encoding
    
    指定者:
    
    getDataSize 在接口中 Measurable
    
    返回:
    
    The size of the value
  - getType
```
public ColumnType getType()
```
    Get the type of the attribute column.
    
    返回:
    
    The type of the attribute column.
  - fromString
```
public static ColumnValue fromString(String value)
```
    Construct an attribute column of type ColumnType.STRING.
    Note: The value must not be a null pointer.
    
    参数:
    
    value - A value of string type.
    
    返回:
    
    The generated instance.
  - fromLong
```
public static ColumnValue fromLong(long value)
```
    Constructs a property column of type ColumnType.INTEGER.
    
    参数:
    
    value - The long integer value.
    
    返回:
    
    The generated instance
  - fromBinary
```
public static ColumnValue fromBinary(byte[] value)
```
    Constructs a property column of type ColumnType.BINARY.
    Note: The value cannot be a null pointer.
    
    参数:
    
    value - The value of binary string type.
    
    返回:
    
    The generated instance
  - fromDouble
```
public static ColumnValue fromDouble(double value)
```
    Constructs a property column of type ColumnType.DOUBLE.
    
    参数:
    
    value - A value of type double.
    
    返回:
    
    The generated instance.
  - fromBoolean
```
public static ColumnValue fromBoolean(boolean value)
```
    Constructs a property column of type ColumnType.BOOLEAN.
    
    参数:
    
    value - A boolean type value.
    
    返回:
    
    The generated instance
  - asString
```
public String asString()
```
    Get the string value of the attribute column.
    Currently, the value can only be obtained when the data type is ColumnType.STRING.
    
    返回:
    
    String value
  - asStringInBytes
```
public byte[] asStringInBytes()
```
  - asLong
```
public long asLong()
```
    Get the long integer value of the attribute column.
    Currently, the value can only be retrieved when the data type is ColumnType.INTEGER.
    
    返回:
    
    Long integer value
  - asBinary
```
public byte[] asBinary()
```
    Get the value of the attribute column as a binary string.
    Currently, the value can only be obtained when the data type is ColumnType.BINARY.
    
    返回:
    
    The value as a binary string
  - asDouble
```
public double asDouble()
```
    Get the value of the attribute column with DOUBLE type.
    Currently, the value can only be obtained when the data type is ColumnType.DOUBLE.
    
    返回:
    
    Value in Double type
  - asBoolean
```
public boolean asBoolean()
```
    Get the boolean value of the attribute column.
    Currently, the value can only be obtained when the data type is ColumnType.BOOLEAN.
    
    返回:
    
    The boolean value
  - getChecksum
```
public byte getChecksum(byte crc)
                 throws IOException
```
    Get a checksum using the crc8 algorithm, mainly used to calculate the checksum of a cell
    
    参数:
    
    crc - initial value of crc
    
    返回:
    
    抛出:
    
    IOException
  - equals
```
public boolean equals(Object o)
```
    覆盖:
    
    equals 在类中 Object
  - hashCode
```
public int hashCode()
```
    覆盖:
    
    hashCode 在类中 Object
  - toString
```
public String toString()
```
    覆盖:
    
    toString 在类中 Object
  - compareTo
```
public int compareTo(ColumnValue target)
```
    Compare the values of two property columns.
    Note: Property columns of different types cannot be compared.
    
    指定者:
    
    compareTo 在接口中 Comparable<ColumnValue>
    
    参数:
    
    target -
    
    返回:
    
    Returns a value greater than 0 if it is greater, 0 if equal, and less than 0 if it is smaller
  - jsonize
```
public String jsonize()
```
    指定者:
    
    jsonize 在接口中 Jsonizable
  - jsonize
```
public void jsonize(StringBuilder sb,
                    String newline)
```
    指定者:
    
    jsonize 在接口中 Jsonizable

类 ColumnValue

字段概要

构造器概要

方法概要

从类继承的方法 java.lang.Object

字段详细资料

INTERNAL_NULL_VALUE

构造器详细资料

ColumnValue

方法详细资料

getValue

getDataSize

getType

fromString

fromLong

fromBinary

fromDouble

fromBoolean

asString

asStringInBytes

asLong

asBinary

asDouble

asBoolean

getChecksum

equals

hashCode

toString

compareTo

jsonize

jsonize