MethodBeforeInterceptor class abstract interface

Defines an interceptor that executes logic before the target method invocation begins.

Implementations of this interface can perform pre-processing steps such as:

  • Security and authorization checks
  • Logging or auditing
  • Context or transaction initialization

Invocation Order

  1. The interceptor’s beforeInvocation is executed.
  2. If successful, the target method (or next interceptor) is invoked.
  3. If beforeInvocation throws an exception, invocation halts.

Example

class LoggingInterceptor implements MethodBeforeInterceptor {
  @override
  bool canIntercept(Method method) => true;

  @override
  Future<void> beforeInvocation<T>(MethodInvocation<T> invocation) async {
    print("Calling method: ${invocation.method.getName()}");
  }
}

See Also

Implemented types

Properties

hashCode → int
The hash code for this object.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

beforeInvocation<T>(MethodInvocation<T> invocation) → FutureOr<void>
Executed immediately before the target method invocation.
canIntercept(Method method) → bool
Determines whether this interceptor can intercept the specified method.
inherited
equalizedProperties() → List<Object?>
Mixin-style contract for value-based equality, hashCode, and toString.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited