JavaToSqlTypeConversionRules (Apache Calcite API)

java.lang.Object
- org.apache.calcite.sql.type.JavaToSqlTypeConversionRules

```
public class JavaToSqlTypeConversionRules
extends java.lang.Object
```
JavaToSqlTypeConversionRules defines mappings from common Java types to corresponding SQL types.

Nested Class Summary

Nested Classes
Modifier and Type Class Description

private static interface JavaToSqlTypeConversionRules.ColumnList
Make this public when needed.

Field Summary

Fields
Modifier and Type Field Description

private static JavaToSqlTypeConversionRules INSTANCE

private java.util.Map<java.lang.Class<?>,SqlTypeName> rules

Constructor Summary

Constructors
Constructor Description

JavaToSqlTypeConversionRules()

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static JavaToSqlTypeConversionRules`	`instance()`	Returns the `singleton` instance.
`SqlTypeName`	`lookup(java.lang.Class javaClass)`	Returns a corresponding `SqlTypeName` for a given Java class.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - INSTANCE
```
private static final JavaToSqlTypeConversionRules INSTANCE
```
  - rules
```
private final java.util.Map<java.lang.Class<?>,SqlTypeName> rules
```
- Constructor Detail
  - JavaToSqlTypeConversionRules
```
public JavaToSqlTypeConversionRules()
```
- Method Detail
  - instance
```
public static JavaToSqlTypeConversionRules instance()
```
    Returns the singleton instance.
  - lookup
```
public SqlTypeName lookup(java.lang.Class javaClass)
```
    Returns a corresponding SqlTypeName for a given Java class.
    
    Parameters:
    
    javaClass - the Java class to lookup
    
    Returns:
    
    a corresponding SqlTypeName if found, otherwise null is returned