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This file is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

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The source code

/*
 * MethodFunction.java - gets a method from a class and a string
 * Copyright (C) 2000 Guillaume Desnoix
 * guillaume-desnoix@memoire.com
 * http://www.memoire.com/guillaume-desnoix/
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURSubE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

package org.jext.dawn.javaccess;

import org.jext.dawn.*;
import java.lang.reflect.*;

/**
 * Returns a method.
* Usage:
* class string method
* Returns the method of the given class and declaration. * @author Guillaume Desnoix */ public class MethodFunction extends Function { public MethodFunction() { super("method"); } public void invoke(DawnParser parser) throws DawnRuntimeException { parser.checkArgsNumber(this, 2); String decl = parser.popString(); Object clazz = parser.pop(); if (!(clazz instanceof Class)) throw new DawnRuntimeException(this, parser, "" + clazz + " is not a class"); Method r=null; try { Method[] methods = ((Class) clazz).getMethods(); for(int i = 0; i < methods.length; i++) { Method m = methods[i]; Class[] p = m.getParameterTypes(); StringBuffer d = new StringBuffer(m.getName() + "("); for(int j = 0; j < p.length; j++) { if (j > 0) d.append(','); d.append(p[j].getName()); } d.append(')'); if (decl.equals(d.toString())) { r = methods[i]; break; } } if (r == null) throw new DawnRuntimeException(this, parser, "method " + decl + " can not be found"); } catch(SecurityException ex) { throw new DawnRuntimeException(this, parser, "security violation"); } // System.out.println("RESULT="+r); parser.push(r); } } // End of MethodFunction.java
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