ai.rapids.cudf

类 HostColumnVector.ColumnBuilder

java.lang.Object

ai.rapids.cudf.HostColumnVector.ColumnBuilder

所有已实现的接口

AutoCloseable

封闭类

HostColumnVector

public static final class HostColumnVector.ColumnBuilder
extends Object
implements AutoCloseable

构建

构造器摘要

构造器

构造器和描述
ColumnBuilder(HostColumnVector.DataType type, long estimatedRows)

方法摘要

修饰符和类型	方法和描述
HostColumnVector.ColumnBuilder	append(BigDecimal value)
HostColumnVector.ColumnBuilder	append(BigInteger unscaledVal)
HostColumnVector.ColumnBuilder	append(boolean value)
HostColumnVector.ColumnBuilder	append(byte value)
HostColumnVector.ColumnBuilder	append(byte[] value, int srcOffset, int length) 追加多个非空字节值。
HostColumnVector.ColumnBuilder	append(double value)
HostColumnVector.ColumnBuilder	append(float value)
HostColumnVector.ColumnBuilder	append(int value)
HostColumnVector.ColumnBuilder	append(long value)
HostColumnVector.ColumnBuilder	append(short value)
HostColumnVector.ColumnBuilder	append(String value)
HostColumnVector.ColumnBuilder	appendByteList(byte[] value) 将字节附加到 INT8/UINT8 的 LIST
HostColumnVector.ColumnBuilder	appendByteList(byte[] value, int srcOffset, int length) 将字节附加到 INT8/UINT8 的 LIST
HostColumnVector.ColumnBuilder	appendDecimal128(byte[] binary) 接受包含未缩放值二进制补码表示的字节数组，该数组为大端字节序。
HostColumnVector.ColumnBuilder	appendLists(List... inputLists)
HostColumnVector.ColumnBuilder	appendNull()
HostColumnVector.ColumnBuilder	appendStructValues(HostColumnVector.StructData... inputList)
HostColumnVector.ColumnBuilder	appendStructValues(List<HostColumnVector.StructData> inputList)
HostColumnVector.ColumnBuilder	appendUTF8String(byte[] value)
HostColumnVector.ColumnBuilder	appendUTF8String(byte[] value, int srcOffset, int length)
HostColumnVector	build()
ColumnVector	buildAndPutOnDevice() 完成并创建不可变的 ColumnVector，并复制到设备上。
void	close()
HostColumnVector.ColumnBuilder	endList() 如果你想构建列表列，你可以获取 `builder.getChild(0)` 并向其追加，完成后调用 `endList`，此时追加到该构建器的所有内容都将位于下一个列表中。
HostColumnVector.ColumnBuilder	endStruct() 如果你想构建结构体列，你可以获取每个子项 `builder.getChild(N)` 并向所有子项追加，完成后调用 `endStruct` 来更新此构建器。
HostColumnVector.ColumnBuilder	getChild(int index)
int	getCurrentByteIndex() 已弃用。
int	getCurrentIndex()
void	incrCurrentIndex() 已弃用。
String	toString()

从类 java.lang.Object 继承的方法

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait(long), wait(long, int)

构造器详情

ColumnBuilder

public ColumnBuilder(HostColumnVector.DataType type,
                     long estimatedRows)

方法详情

build

public HostColumnVector build()

appendLists

public HostColumnVector.ColumnBuilder appendLists(List... inputLists)

appendStructValues

public HostColumnVector.ColumnBuilder appendStructValues(List<HostColumnVector.StructData> inputList)

appendStructValues

public HostColumnVector.ColumnBuilder appendStructValues(HostColumnVector.StructData... inputList)

appendNull

public final HostColumnVector.ColumnBuilder appendNull()

endStruct

public HostColumnVector.ColumnBuilder endStruct()

如果你想构建一个结构体列，你可以获取每个子项 `builder.getChild(N)` 并向所有子项追加，完成后调用 `endStruct` 来更新此构建器。不要在尚未结束结构体之前就开始向子项追加然后向此构建器追加空值，否则可能无法获得预期结果。

返回

此对象用于链式调用。

endList

public HostColumnVector.ColumnBuilder endList()

如果你想构建列表列，你可以获取 `builder.getChild(0)` 并向其追加，完成后调用 `endList`，此时追加到该构建器的所有内容都将位于下一个列表中。不要在尚未结束列表之前就开始向子项追加然后向此构建器追加空值，否则可能无法获得预期结果。

返回

此对象用于链式调用。

incrCurrentIndex

@Deprecated
public void incrCurrentIndex()

已弃用。

getCurrentIndex

public int getCurrentIndex()

getCurrentByteIndex

@Deprecated
public int getCurrentByteIndex()

已弃用。

append

public final HostColumnVector.ColumnBuilder append(byte value)

append

public final HostColumnVector.ColumnBuilder append(short value)

append

public final HostColumnVector.ColumnBuilder append(int value)

append

public final HostColumnVector.ColumnBuilder append(long value)

append

public final HostColumnVector.ColumnBuilder append(float value)

append

public final HostColumnVector.ColumnBuilder append(double value)

append

public final HostColumnVector.ColumnBuilder append(boolean value)

append

public HostColumnVector.ColumnBuilder append(BigDecimal value)

append

public HostColumnVector.ColumnBuilder append(BigInteger unscaledVal)

append

public HostColumnVector.ColumnBuilder append(String value)

appendUTF8String

public HostColumnVector.ColumnBuilder appendUTF8String(byte[] value)

appendUTF8String

public HostColumnVector.ColumnBuilder appendUTF8String(byte[] value,
                                                       int srcOffset,
                                                       int length)

append

public HostColumnVector.ColumnBuilder append(byte[] value,
                                             int srcOffset,
                                             int length)

追加多个非空字节值。

appendByteList

public HostColumnVector.ColumnBuilder appendByteList(byte[] value)

将字节附加到 INT8/UINT8 的 LIST

appendByteList

public HostColumnVector.ColumnBuilder appendByteList(byte[] value,
                                                     int srcOffset,
                                                     int length)

将字节附加到 INT8/UINT8 的 LIST

appendDecimal128

public HostColumnVector.ColumnBuilder appendDecimal128(byte[] binary)

接受包含未缩放值二进制补码表示的字节数组，该数组为大端字节序。然后将其转换为 cuDF Decimal128 的表示形式进行追加。如果我们可以通过 `toByteArray` 方法直接访问 BigDecimal 的二进制补码表示而无需编码，则此方法比 `append(BigInteger unscaledVal)` 更高效。

getChild

public HostColumnVector.ColumnBuilder getChild(int index)

buildAndPutOnDevice

public final ColumnVector buildAndPutOnDevice()

完成并创建不可变的 ColumnVector，并复制到设备上。

close

public void close()

指定者:

接口 AutoCloseable 中的 close

toString

public String toString()

覆盖:

类 Object 中的 toString