MethodInfoDemo.java Source code

Introduction

Here is the source code for MethodInfoDemo.java

Source

/*
 *     file: MethodInfoDemo.java
 *  package: oreilly.hcj.reflection
 *
 * This software is granted under the terms of the Common Public License,
 * CPL, which may be found at the following URL:
 * http://www-124.ibm.com/developerworks/oss/CPLv1.0.htm
 *
 * Copyright(c) 2003-2005 by the authors indicated in the @author tags.
 * All Rights are Reserved by the various authors.
 *
 ########## DO NOT EDIT ABOVE THIS LINE ########## */

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

/**
 * Demonstrates how to get simple method information.
 * 
 * @author <a href=mailto:kraythe@arcor.de>Robert Simmons jr. (kraythe)</a>
 * @version $Revision: 1.3 $
 */
public class MethodInfoDemo {
    /**
     * __UNDOCUMENTED__
     * 
     * @param obj
     *          __UNDOCUMENTED__
     * 
     * @throws IllegalAccessException
     *           __UNDOCUMENTED__
     * @throws InvocationTargetException
     *           __UNDOCUMENTED__
     */
    public static void emptyStrings(final Object obj) throws IllegalAccessException, InvocationTargetException {
        final String PREFIX = "set"; //$NON-NLS-1$
        Method[] methods = obj.getClass().getMethods();
        for (int idx = 0; idx < methods.length; idx++) {
            if (methods[idx].getName().startsWith(PREFIX)) {
                if (methods[idx].getParameterTypes()[0] == String.class) {
                    methods[idx].invoke(obj, new Object[] { new String() });
                }
            }
        }
    }

    /**
     * Demo method.
     * 
     * @param args
     *          Command line arguments.
     */
    public static void main(final String[] args) {
        String s = "";
        printMethodInfo(s);

        try {
            emptyStrings(s);
        } catch (final Exception ex) {
            ex.printStackTrace();
        }
    }

    /**
     * __UNDOCUMENTED__
     * 
     * @param obj
     *          __UNDOCUMENTED__
     */
    public static void printMethodInfo(final Object obj) {
        Class type = obj.getClass();
        final Method[] methods = type.getMethods();
        for (int idx = 0; idx < methods.length; idx++) {
            System.out.println(methods[idx]);
        }
    }
}

/* ########## End of File ########## */