SharedBlock

java.lang.Object
- ohos.data.resultset.SharedBlock

所有已实现的接口:

Sequenceable
```
public class SharedBlock
extends Object
implements Sequenceable
```
Stores result set data.
This class also provides methods for operating shared blocks, such as obtaining the index of a specified column and inserting data into a specified position.

从以下版本开始:

3

SystemCapability

SystemCapability.Data#DATA_APPDATAMGR

嵌套类概要
- 从接口继承的嵌套类/接口 ohos.utils.Sequenceable
  Sequenceable.Producer<T>

构造器概要

构造器
构造器	说明
`SharedBlock(String name)`	A constructor used to create a `SharedBlock` instance with a given `Parcel` object.
`SharedBlock(Parcel source)`	A constructor used to create a `SharedBlock` instance with a given `Parcel` object.

方法概要

所有方法实例方法具体方法
限定符和类型	方法	说明
`boolean`	`allocateRow()`	Adds a new row at the end of a `SharedBlock`.
`void`	`clear()`	Clears data in a shared block.
`void`	`close()`	Release a reference of this object, closing this object if the last reference is released.
`protected void`	`finalize()`	Reclaims resources of this object.
`void`	`freeLastRow()`	Releases data in the last row of a `SharedBlock`.
`byte[]`	`getBlob(int rowIndex, int columnIndex)`	Obtains the `byte array` value at the position specified by `rowIndex` and `columnIndex`.
`double`	`getDouble(int rowIndex, int columnIndex)`	Obtains the `double` value at the position specified by `rowIndex` and `columnIndex`.
`float`	`getFloat(int rowIndex, int columnIndex)`	Obtains the `float` value at the position specified by `rowIndex` and `columnIndex`.
`int`	`getInt(int rowIndex, int columnIndex)`	Obtains the `int` value at the position specified by `rowIndex` and `columnIndex`.
`long`	`getLong(int rowIndex, int columnIndex)`	Obtains the `long` value at the position specified by `rowIndex` and `columnIndex`.
`String`	`getName()`	Obtains the name of a shared block.
`int`	`getRowCount()`	Obtains the number of data rows in a `SharedBlock`.
`short`	`getShort(int rowIndex, int columnIndex)`	Obtains the `short` value at the position specified by `rowIndex` and `columnIndex`.
`int`	`getStartRowIndex()`	Obtains the start row index from a shared block.
`String`	`getString(int rowIndex, int columnIndex)`	Obtains the `string` value at the position specified by `rowIndex` and `columnIndex`.
`ResultSet.ColumnType`	`getType(int rowIndex, int columnIndex)`	Obtains the `ColumnType` of the value at the position specified by `rowIndex` and `columnIndex`.
`boolean`	`marshalling(Parcel out)`	Marshals this `Sequenceable` object into a `Parcel`.
`boolean`	`putBlob(byte[] value, int rowIndex, int columnIndex)`	Assigns a `byte array` value to a specified position in the `SharedBlock`.
`boolean`	`putDouble(double value, int rowIndex, int columnIndex)`	Assigns a `double` value to a specified position in the `SharedBlock`.
`boolean`	`putLong(long value, int rowIndex, int columnIndex)`	Assigns a `long` value to a specified position in the `SharedBlock`.
`boolean`	`putNull(int rowIndex, int columnIndex)`	Assigns `null` to a specified position in the `SharedBlock`.
`boolean`	`putString(String value, int rowIndex, int columnIndex)`	Assigns a `string` value to a specified position in the `SharedBlock`.
`boolean`	`setColumnCount(int count)`	Sets the number of data columns in a `SharedBlock`.
`void`	`setStartRowIndex(int rowIndex)`	Sets the start row index of a shared block to `rowIndex`.
`boolean`	`unmarshalling(Parcel in)`	Unmarshals this `Sequenceable` object from a `Parcel`.

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

从接口继承的方法 ohos.utils.Sequenceable
hasFileDescriptor

- 构造器详细资料
  - SharedBlock
```
public SharedBlock(String name)
```
    A constructor used to create a SharedBlock instance with a given Parcel object.
    If name is null, the default value unKnown will be used.
    
    参数:
    
    name - Indicates the name of the SharedBlock instance.
    
    从以下版本开始:
    
    3
  - SharedBlock
```
public SharedBlock(Parcel source)
```
    A constructor used to create a SharedBlock instance with a given Parcel object.
    
    参数:
    
    source - Indicates the Parcel object containing the source data.
    
    从以下版本开始:
    
    3
- 方法详细资料
  - allocateRow
```
public boolean allocateRow()
```
    Adds a new row at the end of a SharedBlock.
    
    返回:
    
    Returns true if the row is added successfully; returns false if the shared block has insufficient space.
    
    从以下版本开始:
    
    3
  - freeLastRow
```
public void freeLastRow()
```
    Releases data in the last row of a SharedBlock.
    
    从以下版本开始:
    
    3
  - getType
```
public ResultSet.ColumnType getType(int rowIndex,
                                    int columnIndex)
```
    Obtains the ColumnType of the value at the position specified by rowIndex and columnIndex.
    
    参数:
    
    rowIndex - The zero-based row index.
    
    columnIndex - The zero-based column index.
    
    返回:
    
    Returns the ColumnType of the value at the specified position.
    
    从以下版本开始:
    
    3
  - getName
```
public String getName()
```
    Obtains the name of a shared block.
    The name of the shared block will never be null.
    
    返回:
    
    Returns the name of the shared block.
    
    从以下版本开始:
    
    3
  - clear
```
public void clear()
```
    Clears data in a shared block.
    After the data is cleared, new data can be allocated to the shared block.
    
    从以下版本开始:
    
    3
  - getStartRowIndex
```
public int getStartRowIndex()
```
    Obtains the start row index from a shared block.
    
    返回:
    
    Returns the specified row index, which starts from 0.
    
    从以下版本开始:
    
    3
  - setStartRowIndex
```
public void setStartRowIndex(int rowIndex)
```
    Sets the start row index of a shared block to rowIndex.
    
    参数:
    
    rowIndex - Indicates the specified row index, which starts from 0.
    
    从以下版本开始:
    
    3
  - getRowCount
```
public int getRowCount()
```
    Obtains the number of data rows in a SharedBlock.
    
    返回:
    
    Returns the number of data rows in the shared block.
    
    从以下版本开始:
    
    3
  - setColumnCount
```
public boolean setColumnCount(int count)
```
    Sets the number of data columns in a SharedBlock.
    
    参数:
    
    count - Indicates the number of data columns.
    
    返回:
    
    Returns true if the number of data columns is set successfully; returns false otherwise.
    
    从以下版本开始:
    
    3
  - getBlob
```
public byte[] getBlob(int rowIndex,
                      int columnIndex)
```
    Obtains the byte array value at the position specified by rowIndex and columnIndex.
    The returned result varies depending on the value type.
    - If the value type is ColumnType#TYPE_NULL, null is returned.
    - If the value type is ColumnType#TYPE_BLOB, the value is returned directly.
    - If the value type is ColumnType#TYPE_STRING, a byte array value converted from the string value is returned.
    - If the value type is ColumnType#TYPE_FLOAT or ColumnType#TYPE_INTEGER, an exception is thrown.
    参数:
    
    rowIndex - Indicates the specified row index, which starts from 0.
    
    columnIndex - Indicates the specified column index, which starts from 0.
    
    返回:
    
    Returns the byte array value at the specified position.
    
    从以下版本开始:
    
    3
  - getString
```
public String getString(int rowIndex,
                        int columnIndex)
```
    Obtains the string value at the position specified by rowIndex and columnIndex.
    The returned result varies depending on the value type.
    - If the value type is ColumnType#TYPE_NULL, null is returned.
    - If the value type is ColumnType#TYPE_STRING, the value is returned directly.
    - If the value type is ColumnType#TYPE_FLOAT, a string of float data in decimal format is returned.
    - If the value type is ColumnType#TYPE_INTEGER, a string of a decimal integer is returned.
    - If the value type is ColumnType#TYPE_BLOB, an exception is thrown.
    参数:
    
    rowIndex - Indicates the specified row index, which starts from 0.
    
    columnIndex - Indicates the specified column index, which starts from 0.
    
    返回:
    
    Returns the string value at the specified position.
    
    从以下版本开始:
    
    3
  - getLong
```
public long getLong(int rowIndex,
                    int columnIndex)
```
    Obtains the long value at the position specified by rowIndex and columnIndex.
    The returned result varies depending on the value type.
    - If the value type is ColumnType#TYPE_NULL, 0L is returned.
    - If the value type is ColumnType#TYPE_STRING, a long value converted from the string value is returned.
    - If the value type is ColumnType#TYPE_INTEGER, the value is returned directly.
    - If the value type is ColumnType#TYPE_FLOAT, a long value converted from the float value is returned.
    - If the value type is ColumnType#TYPE_BLOB, an exception is thrown.
    参数:
    
    rowIndex - Indicates the specified row index, which starts from 0.
    
    columnIndex - Indicates the specified column index, which starts from 0.
    
    返回:
    
    Returns the long value at the specified position.
    
    从以下版本开始:
    
    3
  - getDouble
```
public double getDouble(int rowIndex,
                        int columnIndex)
```
    Obtains the double value at the position specified by rowIndex and columnIndex.
    The returned result varies depending on the value type.
    - If the value type is ColumnType#TYPE_NULL, 0.0 is returned.
    - If the value type is ColumnType#TYPE_STRING, a double value converted from the string value is returned.
    - If the value type is ColumnType#TYPE_INTEGER, a double value converted from the integer value is returned.
    - If the value type is ColumnType#TYPE_FLOAT, the value is returned directly.
    - If the value type is ColumnType#TYPE_BLOB, an exception is thrown.
    参数:
    
    rowIndex - Indicates the specified row index, which starts from 0.
    
    columnIndex - Indicates the specified column index, which starts from 0.
    
    返回:
    
    Returns the double value at the specified position.
    
    从以下版本开始:
    
    3
  - getShort
```
public short getShort(int rowIndex,
                      int columnIndex)
```
    Obtains the short value at the position specified by rowIndex and columnIndex.
    You can call the getLong(int, int) method to convert the result into a short value.
    
    参数:
    
    rowIndex - Indicates the specified row index, which starts from 0.
    
    columnIndex - Indicates the specified column index, which starts from 0.
    
    返回:
    
    Returns the short value at the specified position.
    
    从以下版本开始:
    
    3
  - getInt
```
public int getInt(int rowIndex,
                  int columnIndex)
```
    Obtains the int value at the position specified by rowIndex and columnIndex.
    You can call the getLong(int, int) method to convert the result into an int value.
    
    参数:
    
    rowIndex - Indicates the specified row index, which starts from 0.
    
    columnIndex - Indicates the specified column index, which starts from 0.
    
    返回:
    
    Returns the int value at the specified position.
    
    从以下版本开始:
    
    3
  - getFloat
```
public float getFloat(int rowIndex,
                      int columnIndex)
```
    Obtains the float value at the position specified by rowIndex and columnIndex.
    You can call the getDouble(int, int) method to convert the result into a float value.
    
    参数:
    
    rowIndex - Indicates the specified row index, which starts from 0.
    
    columnIndex - Indicates the specified column index, which starts from 0.
    
    返回:
    
    Returns the float value at the specified position.
    
    从以下版本开始:
    
    3
  - putBlob
```
public boolean putBlob(byte[] value,
                       int rowIndex,
                       int columnIndex)
```
    Assigns a byte array value to a specified position in the SharedBlock.
    
    参数:
    
    value - Indicates the value to assign.
    
    rowIndex - Indicates the specified row index, which starts from 0.
    
    columnIndex - Indicates the specified column index, which starts from 0.
    
    返回:
    
    Returns true if the value is assigned; returns false otherwise.
    
    从以下版本开始:
    
    3
  - putString
```
public boolean putString(String value,
                         int rowIndex,
                         int columnIndex)
```
    Assigns a string value to a specified position in the SharedBlock.
    
    参数:
    
    value - Indicates the value to assign.
    
    rowIndex - Indicates the specified row index, which starts from 0.
    
    columnIndex - Indicates the specified column index, which starts from 0.
    
    返回:
    
    Returns true if the value is assigned; returns false otherwise.
    
    从以下版本开始:
    
    3
  - putLong
```
public boolean putLong(long value,
                       int rowIndex,
                       int columnIndex)
```
    Assigns a long value to a specified position in the SharedBlock.
    
    参数:
    
    value - Indicates the value to assign.
    
    rowIndex - Indicates the specified row index, which starts from 0.
    
    columnIndex - Indicates the specified column index, which starts from 0.
    
    返回:
    
    Returns true if the value is assigned; returns false otherwise.
    
    从以下版本开始:
    
    3
  - putDouble
```
public boolean putDouble(double value,
                         int rowIndex,
                         int columnIndex)
```
    Assigns a double value to a specified position in the SharedBlock.
    
    参数:
    
    value - Indicates the value to assign.
    
    rowIndex - Indicates the specified row index, which starts from 0.
    
    columnIndex - Indicates the specified column index, which starts from 0.
    
    返回:
    
    Returns true if the value is assigned; returns false otherwise.
    
    从以下版本开始:
    
    3
  - putNull
```
public boolean putNull(int rowIndex,
                       int columnIndex)
```
    Assigns null to a specified position in the SharedBlock.
    
    参数:
    
    rowIndex - Indicates the specified row index, which starts from 0.
    
    columnIndex - Indicates the specified column index, which starts from 0.
    
    返回:
    
    Returns true if the value is assigned; returns false otherwise.
    
    从以下版本开始:
    
    3
  - finalize
```
protected void finalize()
                 throws Throwable
```
    Reclaims resources of this object.
    
    覆盖:
    
    finalize 在类中 Object
    
    抛出:
    
    Throwable - Throws this exception if an error occurs during the resource reclaiming.
    
    从以下版本开始:
    
    3
    
    另请参阅:
    
    WeakReference, PhantomReference
  - marshalling
```
public boolean marshalling(Parcel out)
```
    从接口复制的说明: Sequenceable
    
    Marshals this Sequenceable object into a Parcel.
    
    指定者:
    
    marshalling 在接口中 Sequenceable
    
    参数:
    
    out - Indicates the Parcel object to which the Sequenceable object will be marshaled..
    
    返回:
    
    Returns true if the marshalling is successful; returns false otherwise.
  - unmarshalling
```
public boolean unmarshalling(Parcel in)
```
    从接口复制的说明: Sequenceable
    
    Unmarshals this Sequenceable object from a Parcel.
    
    指定者:
    
    unmarshalling 在接口中 Sequenceable
    
    参数:
    
    in - Indicates the Parcel object into which the Sequenceable object has been marshaled.
    
    返回:
    
    Returns true if the unmarshalling is successful; returns false otherwise.
  - close
```
public void close()
```
    Release a reference of this object, closing this object if the last reference is released.

类 SharedBlock

嵌套类概要

从接口继承的嵌套类/接口 ohos.utils.Sequenceable

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 ohos.utils.Sequenceable

构造器详细资料

SharedBlock

SharedBlock

方法详细资料

allocateRow

freeLastRow

getType

getName

clear

getStartRowIndex

setStartRowIndex

getRowCount

setColumnCount

getBlob

getString

getLong

getDouble

getShort

getInt

getFloat

putBlob

putString

putLong

putDouble

putNull

finalize

marshalling

unmarshalling

close