com.home.ln_spring.ch4.mi.FormatMessageReplacer.java Source code

Introduction

Here is the source code for com.home.ln_spring.ch4.mi.FormatMessageReplacer.java

Source

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

package com.home.ln_spring.ch4.mi;

import java.lang.reflect.Method;
import org.springframework.beans.factory.support.MethodReplacer;

/**
 *
 * @author vitaliy
 */
public class FormatMessageReplacer implements MethodReplacer {

    public Object reimplement(Object arg0, Method method, Object[] args) {

        if (isFormatMessageMethod(method)) {
            String msg = (String) args[0];

            return "<h2>" + msg + "</h2>";
        } else {
            throw new IllegalArgumentException("Unable to reimplement method " + method.getName());
        }

    }

    private boolean isFormatMessageMethod(Method method) {
        //  ? ? 
        if (method.getParameterTypes().length != 1) {
            return false;
        }

        //  ? 
        if (!("formatMessage".equals(method.getName()))) {
            return false;
        }

        //   
        if (method.getReturnType() != String.class) {
            return false;
        }

        //   
        if (method.getParameterTypes()[0] != String.class) {
            return false;
        }

        return true;
    }
}