UnionFieldsStrategy (Smart GWT EE API 14.0p (2026-01-20))

java.lang.Object
- java.lang.Enum<UnionFieldsStrategy>
- - com.smartgwt.client.types.UnionFieldsStrategy

All Implemented Interfaces:

ValueEnum, java.io.Serializable, java.lang.Comparable<UnionFieldsStrategy>
```
public enum UnionFieldsStrategy
extends java.lang.Enum<UnionFieldsStrategy>
implements ValueEnum
```
The strategy used when auto-deriving the fields that make up a UnionDataSource, if no unionFields setting is provided.

Enum Constant Summary

Enum Constants
Enum Constant and Description
`ALL` Create a unioned field for every field contributed by every member dataSource.
`INTERSECT` Only create a unioned field where all of the member dataSources have a field with the same name and data type
`MATCHING` Create a unioned field where at least two of the member dataSources have a field with the same name and data type.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`java.lang.String`	`getValue()`
`static UnionFieldsStrategy`	`valueOf(java.lang.String name)` Returns the enum constant of this type with the specified name.
`static UnionFieldsStrategy[]`	`values()` Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum
clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait

- Enum Constant Detail
  - INTERSECT
```
public static final UnionFieldsStrategy INTERSECT
```
    Only create a unioned field where all of the member dataSources have a field with the same name and data type
    If this enumerated value is used in a Component XML file or server-side DataSource descriptor (.ds.xml file), use the value "intersect".
  - MATCHING
```
public static final UnionFieldsStrategy MATCHING
```
    Create a unioned field where at least two of the member dataSources have a field with the same name and data type. Any member dataSources that do not have the field will contribute a null value for that field in the unioned dataset
    If this enumerated value is used in a Component XML file or server-side DataSource descriptor (.ds.xml file), use the value "matching".
  - ALL
```
public static final UnionFieldsStrategy ALL
```
    Create a unioned field for every field contributed by every member dataSource. Where there are matching fields on other dataSource(s), we will union the fields as described for "matching". Where a field only exists on one dataSource, all other dataSources will contribute null for that field in the unioned dataset
    If this enumerated value is used in a Component XML file or server-side DataSource descriptor (.ds.xml file), use the value "all".
- Method Detail
  - values
```
public static UnionFieldsStrategy[] values()
```
    Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:
```
for (UnionFieldsStrategy c : UnionFieldsStrategy.values())
    System.out.println(c);
```
    Returns:
    
    an array containing the constants of this enum type, in the order they are declared
  - valueOf
```
public static UnionFieldsStrategy valueOf(java.lang.String name)
```
    Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
    
    Parameters:
    
    name - the name of the enum constant to be returned.
    
    Returns:
    
    the enum constant with the specified name
    
    Throws:
    
    java.lang.IllegalArgumentException - if this enum type has no constant with the specified name
    
    java.lang.NullPointerException - if the argument is null
  - getValue
```
public java.lang.String getValue()
```
    Specified by:
    
    getValue in interface ValueEnum

Enum UnionFieldsStrategy

Enum Constant Summary

Method Summary

Methods inherited from class java.lang.Enum

Methods inherited from class java.lang.Object

Enum Constant Detail

INTERSECT

MATCHING

ALL

Method Detail

values

valueOf

getValue