ProjectedRow (Paimon : Common 0.7.0-incubating API)

java.lang.Object
- org.apache.paimon.utils.ProjectedRow

所有已实现的接口:

DataGetters, InternalRow
```
public class ProjectedRow
extends Object
implements InternalRow
```
An implementation of InternalRow which provides a projected view of the underlying InternalRow.
Projection includes both reducing the accessible fields and reordering them.
Note: This class supports only top-level projections, not nested projections.

嵌套类概要
- 从接口继承的嵌套类/接口 org.apache.paimon.data.InternalRow
  InternalRow.FieldGetter

字段概要

字段
限定符和类型字段和说明

protected int[] indexMapping

protected InternalRow row

字段
限定符和类型	字段和说明
`protected int[]`	`indexMapping`
`protected InternalRow`	`row`

构造器概要

构造器
限定符构造器和说明

protected ProjectedRow(int[] indexMapping)

构造器
限定符	构造器和说明
`protected`	`ProjectedRow(int[] indexMapping)`

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
`boolean`	`equals(Object o)`
`static ProjectedRow`	`from(int[] projection)` Create an empty `ProjectedRow` starting from a `projection` array.
`static ProjectedRow`	`from(int[][] projection)` Like `from(int[])`, but throws `IllegalArgumentException` if the provided `projection` array contains nested projections, which are not supported by `ProjectedRow`.
`static ProjectedRow`	`from(Projection projection)` Create an empty `ProjectedRow` starting from a `Projection`.
`InternalArray`	`getArray(int pos)` Returns the array value at the given position.
`byte[]`	`getBinary(int pos)` Returns the binary value at the given position.
`boolean`	`getBoolean(int pos)` Returns the boolean value at the given position.
`byte`	`getByte(int pos)` Returns the byte value at the given position.
`Decimal`	`getDecimal(int pos, int precision, int scale)` Returns the decimal value at the given position.
`double`	`getDouble(int pos)` Returns the double value at the given position.
`int`	`getFieldCount()` Returns the number of fields in this row.
`float`	`getFloat(int pos)` Returns the float value at the given position.
`int`	`getInt(int pos)` Returns the integer value at the given position.
`long`	`getLong(int pos)` Returns the long value at the given position.
`InternalMap`	`getMap(int pos)` Returns the map value at the given position.
`InternalRow`	`getRow(int pos, int numFields)` Returns the row value at the given position.
`RowKind`	`getRowKind()` Returns the kind of change that this row describes in a changelog.
`short`	`getShort(int pos)` Returns the short value at the given position.
`BinaryString`	`getString(int pos)` Returns the string value at the given position.
`Timestamp`	`getTimestamp(int pos, int precision)` Returns the timestamp value at the given position.
`int`	`hashCode()`
`boolean`	`isNullAt(int pos)` Returns true if the element is null at the given position.
`ProjectedRow`	`replaceRow(InternalRow row)` Replaces the underlying `InternalRow` backing this `ProjectedRow`.
`void`	`setRowKind(RowKind kind)` Sets the kind of change that this row describes in a changelog.
`String`	`toString()`

从类继承的方法 java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

从接口继承的方法 org.apache.paimon.data.InternalRow
createFieldGetter, getDataClass

- 字段详细资料
  - indexMapping
```
protected final int[] indexMapping
```
  - row
```
protected InternalRow row
```
- 构造器详细资料
  - ProjectedRow
```
protected ProjectedRow(int[] indexMapping)
```
- 方法详细资料
  - replaceRow
```
public ProjectedRow replaceRow(InternalRow row)
```
    Replaces the underlying InternalRow backing this ProjectedRow.
    This method replaces the row data in place and does not return a new object. This is done for performance reasons.
  - getFieldCount
```
public int getFieldCount()
```
    从接口复制的说明: InternalRow
    
    Returns the number of fields in this row.
    The number does not include RowKind. It is kept separately.
    
    指定者:
    
    getFieldCount 在接口中 InternalRow
  - getRowKind
```
public RowKind getRowKind()
```
    从接口复制的说明: InternalRow
    
    Returns the kind of change that this row describes in a changelog.
    
    指定者:
    
    getRowKind 在接口中 InternalRow
    
    另请参阅:
    
    RowKind
  - setRowKind
```
public void setRowKind(RowKind kind)
```
    从接口复制的说明: InternalRow
    
    Sets the kind of change that this row describes in a changelog.
    
    指定者:
    
    setRowKind 在接口中 InternalRow
    
    另请参阅:
    
    RowKind
  - isNullAt
```
public boolean isNullAt(int pos)
```
    从接口复制的说明: DataGetters
    
    Returns true if the element is null at the given position.
    
    指定者:
    
    isNullAt 在接口中 DataGetters
  - getBoolean
```
public boolean getBoolean(int pos)
```
    从接口复制的说明: DataGetters
    
    Returns the boolean value at the given position.
    
    指定者:
    
    getBoolean 在接口中 DataGetters
  - getByte
```
public byte getByte(int pos)
```
    从接口复制的说明: DataGetters
    
    Returns the byte value at the given position.
    
    指定者:
    
    getByte 在接口中 DataGetters
  - getShort
```
public short getShort(int pos)
```
    从接口复制的说明: DataGetters
    
    Returns the short value at the given position.
    
    指定者:
    
    getShort 在接口中 DataGetters
  - getInt
```
public int getInt(int pos)
```
    从接口复制的说明: DataGetters
    
    Returns the integer value at the given position.
    
    指定者:
    
    getInt 在接口中 DataGetters
  - getLong
```
public long getLong(int pos)
```
    从接口复制的说明: DataGetters
    
    Returns the long value at the given position.
    
    指定者:
    
    getLong 在接口中 DataGetters
  - getFloat
```
public float getFloat(int pos)
```
    从接口复制的说明: DataGetters
    
    Returns the float value at the given position.
    
    指定者:
    
    getFloat 在接口中 DataGetters
  - getDouble
```
public double getDouble(int pos)
```
    从接口复制的说明: DataGetters
    
    Returns the double value at the given position.
    
    指定者:
    
    getDouble 在接口中 DataGetters
  - getString
```
public BinaryString getString(int pos)
```
    从接口复制的说明: DataGetters
    
    Returns the string value at the given position.
    
    指定者:
    
    getString 在接口中 DataGetters
  - getDecimal
```
public Decimal getDecimal(int pos,
                          int precision,
                          int scale)
```
    从接口复制的说明: DataGetters
    
    Returns the decimal value at the given position.
    The precision and scale are required to determine whether the decimal value was stored in a compact representation (see Decimal).
    
    指定者:
    
    getDecimal 在接口中 DataGetters
  - getTimestamp
```
public Timestamp getTimestamp(int pos,
                              int precision)
```
    从接口复制的说明: DataGetters
    
    Returns the timestamp value at the given position.
    The precision is required to determine whether the timestamp value was stored in a compact representation (see Timestamp).
    
    指定者:
    
    getTimestamp 在接口中 DataGetters
  - getBinary
```
public byte[] getBinary(int pos)
```
    从接口复制的说明: DataGetters
    
    Returns the binary value at the given position.
    
    指定者:
    
    getBinary 在接口中 DataGetters
  - getArray
```
public InternalArray getArray(int pos)
```
    从接口复制的说明: DataGetters
    
    Returns the array value at the given position.
    
    指定者:
    
    getArray 在接口中 DataGetters
  - getMap
```
public InternalMap getMap(int pos)
```
    从接口复制的说明: DataGetters
    
    Returns the map value at the given position.
    
    指定者:
    
    getMap 在接口中 DataGetters
  - getRow
```
public InternalRow getRow(int pos,
                          int numFields)
```
    从接口复制的说明: DataGetters
    
    Returns the row value at the given position.
    The number of fields is required to correctly extract the row.
    
    指定者:
    
    getRow 在接口中 DataGetters
  - 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
  - from
```
public static ProjectedRow from(int[][] projection)
                         throws IllegalArgumentException
```
    Like from(int[]), but throws IllegalArgumentException if the provided projection array contains nested projections, which are not supported by ProjectedRow.
    The array represents the mapping of the fields of the original DataType, including nested rows. For example, [[0, 2, 1], ...] specifies to include the 2nd field of the 3rd field of the 1st field in the top-level row.
    
    抛出:
    
    IllegalArgumentException
    
    另请参阅:
    
    Projection, ProjectedRow
  - from
```
public static ProjectedRow from(int[] projection)
```
    Create an empty ProjectedRow starting from a projection array.
    The array represents the mapping of the fields of the original DataType. For example, [0, 2, 1] specifies to include in the following order the 1st field, the 3rd field and the 2nd field of the row.
    
    另请参阅:
    
    Projection, ProjectedRow
  - from
```
public static ProjectedRow from(Projection projection)
```
    Create an empty ProjectedRow starting from a Projection.
    Throws IllegalStateException if the provided projection array contains nested projections, which are not supported by ProjectedRow.
    
    另请参阅:
    
    Projection, ProjectedRow

类 ProjectedRow

嵌套类概要

从接口继承的嵌套类/接口 org.apache.paimon.data.InternalRow

字段概要

构造器概要

方法概要

从类继承的方法 java.lang.Object

从接口继承的方法 org.apache.paimon.data.InternalRow

字段详细资料

indexMapping

row

构造器详细资料

ProjectedRow

方法详细资料

replaceRow

getFieldCount

getRowKind

setRowKind

isNullAt

getBoolean

getByte

getShort

getInt

getLong

getFloat

getDouble

getString

getDecimal

getTimestamp

getBinary

getArray

getMap

getRow

equals

hashCode

toString

from

from

from