Class IntrospectorBase

java.lang.Object
org.apache.velocity.util.introspection.IntrospectorBase
Direct Known Subclasses:
Introspector

public abstract class IntrospectorBase extends Object
Lookup a a Method object for a particular class given the name of a method and its parameters. The first time the Introspector sees a class it creates a class method map for the class in question. Basically the class method map is a Hashtable where Method objects are keyed by a concatenation of the method name and the names of classes that make up the parameters. For example, a method with the following signature: public void method(String a, StringBuffer b) would be mapped by the key: "method" + "java.lang.String" + "java.lang.StringBuffer" This mapping is performed for all the methods in a class and stored for.
Version:
$Id: IntrospectorBase.java 685685 2008-08-13 21:43:27Z nbubna $
  • Field Details

    • log

      protected final Log log
      Class logger
    • introspectorCache

      private final IntrospectorCache introspectorCache
      The Introspector Cache
  • Constructor Details

    • IntrospectorBase

      protected IntrospectorBase(Log log)
      C'tor.
  • Method Details

    • getMethod

      public Method getMethod(Class c, String name, Object[] params) throws IllegalArgumentException, MethodMap.AmbiguousException
      Gets the method defined by name and params for the Class c.
      Parameters:
      c - Class in which the method search is taking place
      name - Name of the method being searched for
      params - An array of Objects (not Classes) that describe the the parameters
      Returns:
      The desired Method object.
      Throws:
      IllegalArgumentException - When the parameters passed in can not be used for introspection.
      MethodMap.AmbiguousException - When the method map contains more than one match for the requested signature.
    • getIntrospectorCache

      protected IntrospectorCache getIntrospectorCache()
      Return the internal IntrospectorCache object.
      Returns:
      The internal IntrospectorCache object.
      Since:
      1.5