Package org.apache.felix.scr.impl.inject.field

Class FieldUtils

java.lang.Object
org.apache.felix.scr.impl.inject.field.FieldUtils
public class FieldUtils extends Object
Utility methods for handling field injection.

  • Constructor Details

    • FieldUtils

      public FieldUtils()

  • Method Details

    • searchField

      public static FieldUtils.FieldSearchResult searchField(Class<?> componentClass, String fieldName, ComponentLogger logger)
      Searches the field named fieldName in the given targetClass. If the target class has no acceptable field the class hierarchy is traversed until a field is found or the root of the class hierarchy is reached without finding a field.

      If an unexpected error occurs while searching, null is returned. In all other cases a FieldSearchResult is returned. If no field is found, FieldSearchResult#field is set to null. If the field is found, but not usable (e.g. due to visibility restrictions), FieldSearchResult#usable is set to false.

      Parameters:
      fieldName - The name of the field
      logger - A logger to log errors / problems
      targetClass - The class of the component
      Returns:
      A field search result or null if an unexpected error occurred.

    • toString

      public static String toString(Class<?> componentClass, Field field)
      Return a string representation of the field
      Parameters:
      componentClass - The component class
      field - The field
      Returns:
      A string representation of the field

    • setField

      public static void setField(Field f, Object component, Object value, ComponentLogger logger)
      Set the field, type etc.
      Parameters:
      f - The field
      component - The component instance
      value - The value to set
      logger - The logger