Package org.springframework.boot.util

Class LambdaSafe.InvocationResult<R>

java.lang.Object
org.springframework.boot.util.LambdaSafe.InvocationResult<R>
Type Parameters:
R - the result type
Enclosing class:
LambdaSafe
public static final class LambdaSafe.InvocationResult<R> extends Object
The result of a callback which may be a value, null or absent entirely if the callback wasn't suitable. Similar in design to Optional but allows for null as a valid value.

  • Method Details

    • hasResult

      public boolean hasResult()
      Return true if a result in present.
      Returns:
      if a result is present

    • get

      public R get()
      Return the result of the invocation or null if the callback wasn't suitable.
      Returns:
      the result of the invocation or null

    • get

      public R get(R fallback)
      Return the result of the invocation or the given fallback if the callback wasn't suitable.
      Parameters:
      fallback - the fallback to use when there is no result
      Returns:
      the result of the invocation or the fallback

    • of

      public static <R> LambdaSafe.InvocationResult<R> of(R value)
      Create a new LambdaSafe.InvocationResult instance with the specified value.
      Type Parameters:
      R - the result type
      Parameters:
      value - the value (may be null)
      Returns:
      an LambdaSafe.InvocationResult

    • noResult

      public static <R> LambdaSafe.InvocationResult<R> noResult()
      Return an LambdaSafe.InvocationResult instance representing no result.
      Type Parameters:
      R - the result type
      Returns:
      an LambdaSafe.InvocationResult