Constructor Detail

• ConstantCallSite

  public ConstantCallSite(MethodHandle target)

  Creates a call site with a permanent target.

  Parameters:

  target - the target to be permanently associated with this call site

  Throws:

  NullPointerException - if the proposed target is null

Method Detail

• getTarget

  public final MethodHandle getTarget()

  Returns the target method of the call site, which behaves like a final field of the ConstantCallSite. That is, the the target is always the original value passed to the constructor call which created this instance.

  Specified by:

  getTarget in class CallSite

  Returns:

  the immutable linkage state of this call site, a constant method handle

  Throws:

  UnsupportedOperationException - because this kind of call site cannot change its target

  See Also:

  ConstantCallSite, VolatileCallSite, CallSite.setTarget(java.lang.invoke.MethodHandle), getTarget(), MutableCallSite.getTarget(), VolatileCallSite.getTarget()

• setTarget

  public final void setTarget(MethodHandle ignore)

  Always throws an UnsupportedOperationException. This kind of call site cannot change its target.

  Specified by:

  setTarget in class CallSite

  Parameters:

  ignore - a new target proposed for the call site, which is ignored

  Throws:

  UnsupportedOperationException - because this kind of call site cannot change its target

  See Also:

  CallSite.getTarget(), setTarget(java.lang.invoke.MethodHandle), MutableCallSite.setTarget(java.lang.invoke.MethodHandle), VolatileCallSite.setTarget(java.lang.invoke.MethodHandle)

• dynamicInvoker

  public final MethodHandle dynamicInvoker()

  Returns this call site's permanent target. Since that target will never change, this is a correct implementation of CallSite.dynamicInvoker.

  Specified by:

  dynamicInvoker in class CallSite

  Returns:

  the immutable linkage state of this call site, a constant method handle