com.smartgwt.client.types

## Enum UnionFieldsStrategy

- 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`