Package jfun.yan

Source Code of jfun.yan.MethodFunction

/*****************************************************************************
* Copyright (C) Codehaus.org. All rights reserved.            *
* ------------------------------------------------------------------------- *
* The software in this package is published under the terms of the BSD      *
* style license a copy of which has been included with this distribution in *
* the LICENSE.txt file.                                                     *
*****************************************************************************/
/*
* Created on Feb 28, 2005
*
* Author Ben Yu
* ZBS
*/
package jfun.yan;

import jfun.util.Misc;
import jfun.util.SerializableMethod;
import jfun.yan.function.Function;

/**
* Codehaus.org.
*
* @author Ben Yu
*
*/
final class MethodFunction implements Function{
  private final Object obj;
  private final jfun.util.SerializableMethod mtd;
 
  public Object call(Object[] args)
  throws Throwable{
    try{
      return mtd.getMethod().invoke(obj, args);
    }
    catch(java.lang.reflect.InvocationTargetException e){
      throw Utils.wrapInvocationException(e);
    }
  }
  public Class[] getParameterTypes() {
    return mtd.getMethod().getParameterTypes();
  }
  public Class getReturnType() {
    return mtd.getMethod().getReturnType();
  }
  public boolean isConcrete(){
    return false;
  }
  MethodFunction(final Object obj, final java.lang.reflect.Method mtd) {
    this.obj = obj;
    this.mtd = new SerializableMethod(mtd);
  }
 
  public boolean equals(Object other) {
    if(other instanceof MethodFunction){
      final MethodFunction m2 = (MethodFunction)other;
      return obj==m2.obj && mtd.equals(m2.mtd);
    }
    else return false;
  }
  public String getName() {
    return mtd.getMethod().getName();
  }
  public int hashCode() {
    return Misc.hashcode(obj)*31+mtd.hashCode();
  }
  public String toString() {
    return mtd.toString();
  }
}
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