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Java Source Code / Java Documentation » Template Engine » Velocity » org.apache.velocity.util.introspection 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   org.apache.velocity.util.introspection.IntrospectorBase
      org.apache.velocity.util.introspection.Introspector

All known Subclasses:   org.apache.velocity.util.introspection.SecureIntrospectorImpl,
Introspector
public class Introspector extends IntrospectorBase (Code)
This basic function of this class is to return a Method object for a particular class given the name of a method and the parameters to the method in the form of an Object[] 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 Hastable 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
author:
   Jason van Zyl
author:
   Bob McWhirter
author:
   Attila Szegedi
author:
   Paulo Gaspar
author:
   Henning P. Schmiedehausen
version:
   $Id: Introspector.java 477003 2006-11-20 01:14:22Z henning $


Field Summary
final public static  StringCACHEDUMP_MSG
    

Constructor Summary
public  Introspector(Log log)
    
public  Introspector(RuntimeLogger logger)
    

Method Summary
public  MethodgetMethod(Class c, String name, Object[] params)
     Gets the method defined by name and params for the Class c.
public  voidtriggerClear()
     Logs that the Introspector Cache has been cleared.

Field Detail
CACHEDUMP_MSG
final public static String CACHEDUMP_MSG(Code)
define a public string so that it can be looked for if interested




Constructor Detail
Introspector
public Introspector(Log log)(Code)

Parameters:
  log - A Log object to use for the introspector.



Introspector
public Introspector(RuntimeLogger logger)(Code)

Parameters:
  logger - A runtime logger object.




Method Detail
getMethod
public Method getMethod(Class c, String name, Object[] params) throws IllegalArgumentException(Code)
Gets the method defined by name and params for the Class c.
Parameters:
  c - Class in which the method search is taking place
Parameters:
  name - Name of the method being searched for
Parameters:
  params - An array of Objects (not Classes) that describe thethe parameters The desired Method object.
throws:
  IllegalArgumentException - When the parameters passed in can not be used for introspection.



triggerClear
public void triggerClear()(Code)
Logs that the Introspector Cache has been cleared.



Fields inherited from org.apache.velocity.util.introspection.IntrospectorBase
final protected Log log(Code)(Java Doc)

Methods inherited from org.apache.velocity.util.introspection.IntrospectorBase
protected void clearCache()(Code)(Java Doc)
protected ClassMap createClassMap(Class c)(Code)(Java Doc)
protected IntrospectorCache getIntrospectorCache()(Code)(Java Doc)
public Method getMethod(Class c, String name, Object[] params) throws IllegalArgumentException, MethodMap.AmbiguousException(Code)(Java Doc)
protected ClassMap lookupClassMap(Class c)(Code)(Java Doc)
public void triggerClear()(Code)(Java Doc)
public void triggerGet(Class c, ClassMap classMap)(Code)(Java Doc)
public void triggerPut(Class c, ClassMap classMap)(Code)(Java Doc)

Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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