Package org.geotools.api.feature.type

Interface Operation

All Superinterfaces:
PropertyDescriptor
public interface Operation extends PropertyDescriptor
An implementation of an operation that may be invoked on an Attribute.
Author:
Jody Garnett, Refractions Research

  • Method Details

    • getMaxOccurs

      int getMaxOccurs()
      Operations are not part of the structure.
      Specified by:
      getMaxOccurs in interface PropertyDescriptor
      Returns:
      0 in order to not trip up

    • getMinOccurs

      int getMinOccurs()
      Operations are not part of the structure.
      Specified by:
      getMinOccurs in interface PropertyDescriptor
      Returns:
      0 in order to not trip up

    • getType

      OperationType getType()
      Indicates the OpperationType of this attribute
      Specified by:
      getType in interface PropertyDescriptor

    • isImplemented

      boolean isImplemented()
      Indicates if invoke may be called.

      In order allow for faithful description of a software system we will need construct models dynamically at runtime, possibly when no implementation of this Operation is available. As an example when working with features in a web application some operations may only be available when being executed on a remote web processing service.

      Returns:
      true if invoke may be called.

    • invoke

      Object invoke(Attribute target, Object... params) throws InvocationTargetException
      Invoke this operation on an attribute using the provided parameters.

      The state of the attribute may be used and / or updated during the execution of the operation.

      Please check to ensure that isImplemented returns true before calling invoke.

      Parameters:
      target - Attribute this operation is being applied to, the state of this attribute may be changed by this operation.
      params - parameters used by the operation
      Returns:
      the result of the operation
      Throws:
      InvoationTargetException - if an error occurred while processing
      InvocationTargetException