com.aliyun.odps

Class Column

java.lang.Object

com.aliyun.odps.Column

All Implemented Interfaces:

Serializable

public final class Column
extends Object
implements Serializable

Column表示ODPS中表的列定义

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Column.ColumnBuilder

Constructor Summary

Constructors

Constructor and Description
Column(Column.ColumnBuilder columnBuilder)
Column(String name, OdpsType type) Deprecated.
Column(String name, OdpsType type, String comment) Deprecated.
Column(String name, OdpsType type, String comment, String label, List<OdpsType> genericOdpsTypeList) Deprecated.
Column(String name, TypeInfo typeInfo) Constructor of Column.
Column(String name, TypeInfo typeInfo, String comment) Constructor of Column.
Column(String name, TypeInfo typeInfo, String comment, String label) Constructor of Column.
Column(String name, TypeInfo typeInfo, String comment, String label, List<String> extendedLabels) Constructor of Column.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object o)
String	getCategoryLabel()
String	getComment() 获得列注释
String	getDefaultValue() 获取 Column 的默认值， 若没有设置，则返回 NULL 注意: 目前不论 column type 是什么，都返回的是字符串形式的默认值
List<String>	getExtendedlabels() 获取 Column 的扩展标签
List<OdpsType>	getGenericTypeList() Deprecated.
Long	getLabel() Deprecated.
String	getName() 获得列名
OdpsType	getType() Deprecated.
TypeInfo	getTypeInfo() 获得列类型
boolean	hasDefaultValue() Column 是否有默认值
int	hashCode()
boolean	isNullable() Column 是否可以为 NULL
static Column.ColumnBuilder	newBuilder(String name, TypeInfo typeInfo)
void	setDefaultValue(String defaultValue) 设置 Column 的默认值 注意: 目前不论 column type 是什么，都是字符串形式的默认值
void	setGenericTypeList(List<OdpsType> genericOdpsTypeList) Deprecated.
void	setNullable(boolean nullable) 设置 Column 是否可以为 null

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Column

public Column(String name,
              TypeInfo typeInfo)

Constructor of Column. Representing a column of a table.

Parameters:

name - Column name.

typeInfo - TypeInfo. See TypeInfoFactory.

Column

public Column(String name,
              TypeInfo typeInfo,
              String comment)

Constructor of Column. Representing a column of a table.

Parameters:

name - Column name.

typeInfo - TypeInfo. See TypeInfoFactory.

comment - Comment.

Column

public Column(String name,
              TypeInfo typeInfo,
              String comment,
              String label)

Constructor of Column. Representing a column of a table.

Parameters:

name - Column name.

typeInfo - TypeInfo. See TypeInfoFactory.

comment - Comment.

label - Column label.

Column

public Column(String name,
              TypeInfo typeInfo,
              String comment,
              String label,
              List<String> extendedLabels)

Constructor of Column. Representing a column of a table.

Parameters:

name - Column name.

typeInfo - TypeInfo. See TypeInfoFactory.

comment - Comment.

label - Column label.

extendedLabels - Column extended labels.

Column

public Column(Column.ColumnBuilder columnBuilder)

Column

@Deprecated
public Column(String name,
                          OdpsType type)

Deprecated.

Deprecated.

See Also:

Column(String, TypeInfo).

Column

@Deprecated
public Column(String name,
                          OdpsType type,
                          String comment)

Deprecated.

Deprecated.

See Also:

Column(String, TypeInfo, String).

Column

@Deprecated
public Column(String name,
                          OdpsType type,
                          String comment,
                          String label,
                          List<OdpsType> genericOdpsTypeList)

Deprecated.

Deprecated.

See Also:

Column(String, TypeInfo).

Method Detail

newBuilder

public static Column.ColumnBuilder newBuilder(String name,
                                              TypeInfo typeInfo)

getName

public String getName()

获得列名

Returns:

列名

getType

@Deprecated
public OdpsType getType()

Deprecated.

Deprecated.

See Also:

getTypeInfo().

getTypeInfo

public TypeInfo getTypeInfo()

获得列类型

Returns:

列类型. See TypeInfo.

getComment

public String getComment()

获得列注释

Returns:

列注释

getLabel

@Deprecated
public Long getLabel()

Deprecated.

Deprecated.

Returns:

列标签

See Also:

getCategoryLabel().

getExtendedlabels

public List<String> getExtendedlabels()

获取 Column 的扩展标签

Returns:

列扩展标签

getCategoryLabel

public String getCategoryLabel()

getGenericTypeList

@Deprecated
public List<OdpsType> getGenericTypeList()

Deprecated.

Deprecated.

setGenericTypeList

@Deprecated
public void setGenericTypeList(List<OdpsType> genericOdpsTypeList)

Deprecated.

Deprecated.

getDefaultValue

public String getDefaultValue()

获取 Column 的默认值， 若没有设置，则返回 NULL 注意: 目前不论 column type 是什么，都返回的是字符串形式的默认值

Returns:

列默认值

setDefaultValue

public void setDefaultValue(String defaultValue)

设置 Column 的默认值 注意: 目前不论 column type 是什么，都是字符串形式的默认值

Parameters:

defaultValue -

isNullable

public boolean isNullable()

Column 是否可以为 NULL

Returns:

是否可以是 null

setNullable

public void setNullable(boolean nullable)

设置 Column 是否可以为 null

Parameters:

nullable -

hasDefaultValue

public boolean hasDefaultValue()

Column 是否有默认值

Returns:

是否有默认值

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object