java.lang.Object
- com.mysql.cj.xdevapi.ExprUtil

```
public class ExprUtil
extends Object
```
Utilities to deal with Expr (and related) structures.

构造器概要

构造器
构造器说明

ExprUtil()

方法概要

所有方法静态方法具体方法
修饰符和类型	方法	说明
`static MysqlxDatatypes.Any`	`anyOf(MysqlxDatatypes.Scalar s)`	Protocol buffers helper to build an Any Scalar type.
`static MysqlxExpr.Expr`	`argObjectToExpr(Object value, boolean allowRelationalColumns)`	Protocol buffers helper to build Expr with any object.
`static MysqlxDatatypes.Scalar`	`argObjectToScalar(Object value)`	Protocol buffers helper to build a Scalar type with any object.
`static MysqlxDatatypes.Any`	`argObjectToScalarAny(Object value)`	Protocol buffers helper to build an Any type with any object.
`static MysqlxDatatypes.Any`	`buildAny(boolean b)`	Build a Protocol buffers Any with a boolean value.
`static MysqlxDatatypes.Any`	`buildAny(String str)`	Build a Protocol buffers Any with a string value.
`static MysqlxCrud.Collection`	`buildCollection(String schemaName, String collectionName)`	Build a Protocol buffers Collection.
`static MysqlxExpr.Expr`	`buildLiteralExpr(MysqlxDatatypes.Scalar scalar)`	Wrap an Any value in a LITERAL expression.
`static MysqlxExpr.Expr`	`buildLiteralNullScalar()`	Protocol buffers helper to build a LITERAL Expr with a Scalar NULL type.
`static MysqlxExpr.Expr`	`buildLiteralScalar(boolean b)`	Protocol buffers helper to build a LITERAL Expr with a Scalar BOOL type.
`static MysqlxExpr.Expr`	`buildLiteralScalar(byte[] bytes)`	Protocol buffers helper to build a LITERAL Expr with a Scalar OCTETS type.
`static MysqlxExpr.Expr`	`buildLiteralScalar(double d)`	Protocol buffers helper to build a LITERAL Expr with a Scalar DOUBLE type.
`static MysqlxExpr.Expr`	`buildLiteralScalar(long l)`	Protocol buffers helper to build a LITERAL Expr with a Scalar SINT (signed int) type.
`static MysqlxExpr.Expr`	`buildLiteralScalar(String str)`	Protocol buffers helper to build a LITERAL Expr with a Scalar STRING type.
`static MysqlxExpr.Expr`	`buildPlaceholderExpr(int pos)`	Creates a placeholder expression for the given position in the `args` array
`static MysqlxDatatypes.Scalar`	`nullScalar()`	Protocol buffers helper to build a Scalar NULL type.
`static MysqlxDatatypes.Scalar`	`scalarOf(boolean b)`	Protocol buffers helper to build a Scalar BOOL type.
`static MysqlxDatatypes.Scalar`	`scalarOf(byte[] bytes)`	Protocol buffers helper to build a Scalar OCTETS type.
`static MysqlxDatatypes.Scalar`	`scalarOf(double d)`	Protocol buffers helper to build a Scalar DOUBLE type.
`static MysqlxDatatypes.Scalar`	`scalarOf(long l)`	Protocol buffers helper to build a Scalar SINT (signed int) type.
`static MysqlxDatatypes.Scalar`	`scalarOf(String str)`	Protocol buffers helper to build a Scalar STRING type.

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

- 构造器详细资料
  - ExprUtil
```
public ExprUtil()
```
- 方法详细资料
  - buildLiteralNullScalar
```
public static MysqlxExpr.Expr buildLiteralNullScalar()
```
    Protocol buffers helper to build a LITERAL Expr with a Scalar NULL type.
    
    返回:
    
    MysqlxExpr.Expr
  - buildLiteralScalar
```
public static MysqlxExpr.Expr buildLiteralScalar(double d)
```
    Protocol buffers helper to build a LITERAL Expr with a Scalar DOUBLE type.
    
    参数:
    
    d - value
    
    返回:
    
    MysqlxExpr.Expr
  - buildLiteralScalar
```
public static MysqlxExpr.Expr buildLiteralScalar(long l)
```
    Protocol buffers helper to build a LITERAL Expr with a Scalar SINT (signed int) type.
    
    参数:
    
    l - value
    
    返回:
    
    MysqlxExpr.Expr
  - buildLiteralScalar
```
public static MysqlxExpr.Expr buildLiteralScalar(String str)
```
    Protocol buffers helper to build a LITERAL Expr with a Scalar STRING type.
    
    参数:
    
    str - value
    
    返回:
    
    MysqlxExpr.Expr
  - buildLiteralScalar
```
public static MysqlxExpr.Expr buildLiteralScalar(byte[] bytes)
```
    Protocol buffers helper to build a LITERAL Expr with a Scalar OCTETS type.
    
    参数:
    
    bytes - value
    
    返回:
    
    MysqlxExpr.Expr
  - buildLiteralScalar
```
public static MysqlxExpr.Expr buildLiteralScalar(boolean b)
```
    Protocol buffers helper to build a LITERAL Expr with a Scalar BOOL type.
    
    参数:
    
    b - value
    
    返回:
    
    MysqlxExpr.Expr
  - buildLiteralExpr
```
public static MysqlxExpr.Expr buildLiteralExpr(MysqlxDatatypes.Scalar scalar)
```
    Wrap an Any value in a LITERAL expression.
    
    参数:
    
    scalar - MysqlxDatatypes.Scalar
    
    返回:
    
    MysqlxExpr.Expr
  - buildPlaceholderExpr
```
public static MysqlxExpr.Expr buildPlaceholderExpr(int pos)
```
    Creates a placeholder expression for the given position in the args array
    
    参数:
    
    pos - the position of the placeholder in the args array
    
    返回:
    
    MysqlxExpr.Expr
  - nullScalar
```
public static MysqlxDatatypes.Scalar nullScalar()
```
    Protocol buffers helper to build a Scalar NULL type.
    
    返回:
    
    MysqlxDatatypes.Scalar
  - scalarOf
```
public static MysqlxDatatypes.Scalar scalarOf(double d)
```
    Protocol buffers helper to build a Scalar DOUBLE type.
    
    参数:
    
    d - value
    
    返回:
    
    MysqlxDatatypes.Scalar
  - scalarOf
```
public static MysqlxDatatypes.Scalar scalarOf(long l)
```
    Protocol buffers helper to build a Scalar SINT (signed int) type.
    
    参数:
    
    l - value
    
    返回:
    
    MysqlxDatatypes.Scalar
  - scalarOf
```
public static MysqlxDatatypes.Scalar scalarOf(String str)
```
    Protocol buffers helper to build a Scalar STRING type.
    
    参数:
    
    str - value
    
    返回:
    
    MysqlxDatatypes.Scalar
  - scalarOf
```
public static MysqlxDatatypes.Scalar scalarOf(byte[] bytes)
```
    Protocol buffers helper to build a Scalar OCTETS type.
    
    参数:
    
    bytes - value
    
    返回:
    
    MysqlxDatatypes.Scalar
  - scalarOf
```
public static MysqlxDatatypes.Scalar scalarOf(boolean b)
```
    Protocol buffers helper to build a Scalar BOOL type.
    
    参数:
    
    b - value
    
    返回:
    
    MysqlxDatatypes.Scalar
  - anyOf
```
public static MysqlxDatatypes.Any anyOf(MysqlxDatatypes.Scalar s)
```
    Protocol buffers helper to build an Any Scalar type.
    
    参数:
    
    s - value
    
    返回:
    
    MysqlxDatatypes.Any
  - buildAny
```
public static MysqlxDatatypes.Any buildAny(String str)
```
    Build a Protocol buffers Any with a string value.
    
    参数:
    
    str - value
    
    返回:
    
    MysqlxDatatypes.Any
  - buildAny
```
public static MysqlxDatatypes.Any buildAny(boolean b)
```
    Build a Protocol buffers Any with a boolean value.
    
    参数:
    
    b - value
    
    返回:
    
    MysqlxDatatypes.Any
  - buildCollection
```
public static MysqlxCrud.Collection buildCollection(String schemaName,
                                                    String collectionName)
```
    Build a Protocol buffers Collection.
    
    参数:
    
    schemaName - schema name
    
    collectionName - collection name
    
    返回:
    
    MysqlxCrud.Collection
  - argObjectToScalar
```
public static MysqlxDatatypes.Scalar argObjectToScalar(Object value)
```
    Protocol buffers helper to build a Scalar type with any object.
    
    参数:
    
    value - value
    
    返回:
    
    MysqlxDatatypes.Scalar
  - argObjectToScalarAny
```
public static MysqlxDatatypes.Any argObjectToScalarAny(Object value)
```
    Protocol buffers helper to build an Any type with any object.
    
    参数:
    
    value - value
    
    返回:
    
    MysqlxDatatypes.Any
  - argObjectToExpr
```
public static MysqlxExpr.Expr argObjectToExpr(Object value,
                                              boolean allowRelationalColumns)
```
    Protocol buffers helper to build Expr with any object.
    
    参数:
    
    value - value
    
    allowRelationalColumns - Are relational columns identifiers allowed?
    
    返回:
    
    MysqlxExpr.Expr

类 ExprUtil

构造器概要

方法概要

从类继承的方法 java.lang.Object

构造器详细资料

ExprUtil

方法详细资料

buildLiteralNullScalar

buildLiteralScalar

buildLiteralScalar

buildLiteralScalar

buildLiteralScalar

buildLiteralScalar

buildLiteralExpr

buildPlaceholderExpr

nullScalar

scalarOf

scalarOf

scalarOf

scalarOf

scalarOf

anyOf

buildAny

buildAny

buildCollection

argObjectToScalar

argObjectToScalarAny

argObjectToExpr