Package org.apache.beam.sdk.schemas.annotations

Annotation Interface DefaultSchema

@Documented
@Retention(RUNTIME)
@Target(TYPE)
public @interface DefaultSchema

The DefaultSchema annotation specifies a SchemaProvider class to handle obtaining a schema and row for the specified class.

For example, if your class is JavaBean, the JavaBeanSchema provider class knows how to vend schemas for this class. You can annotate it as follows:

@DefaultSchema(JavaBeanSchema.class)
 class MyClass {
   public String getFoo();
   void setFoo(String foo);
         ....
 }
 

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	DefaultSchema.DefaultSchemaProvider	SchemaProvider for default schemas.
static class	DefaultSchema.DefaultSchemaProviderRegistrar	Registrar for default schemas.

Required Element Summary

Required Elements

Modifier and Type	Required Element	Description
Class<? extends SchemaProvider>	value	The schema provider implementation that knows how to vend schemas for the annotated class.

Element Details

value

@CheckForNull
Class<? extends SchemaProvider> value

The schema provider implementation that knows how to vend schemas for the annotated class.