Java Reflection Method Signature getMethodSignature(Method method)

Description

get Method Signature

License

Apache License

Declaration

public static String getMethodSignature(Method method) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.lang.reflect.Method;

import java.util.Arrays;

import java.util.List;
import java.util.Map;

import java.util.concurrent.ConcurrentHashMap;

public class Main {
    private static final Map<Method, List<Class<?>>> parameterTypeCache = new ConcurrentHashMap<>();

    public static String getMethodSignature(Method method) {
        StringBuilder sb = new StringBuilder();
        if (method.getReturnType() != null) {
            sb.append(method.getReturnType().getName()).append("#");
        }//from ww  w.j a  v  a 2s  .c o m

        sb.append(method.getName());

        Class<?>[] parameterTypes = method.getParameterTypes();
        if (parameterTypes != null) {
            for (int i = 0, length = parameterTypes.length; i < length; i++) {
                if (i == 0) {
                    sb.append(":");
                } else {
                    sb.append(",");
                }
                sb.append(parameterTypes[i].getName());
            }
        }
        return sb.toString();
    }

    /**
     * @param method
     * @return {@code List<Class<?>>}
     */
    public static List<Class<?>> getParameterTypes(Method method) {
        if (parameterTypeCache.containsKey(method)) {
            return parameterTypeCache.get(method);
        }

        List<Class<?>> types = Arrays.asList(method.getParameterTypes());
        parameterTypeCache.put(method, types);

        return types;
    }
}

Related

1. getMethodSignature(Method method)
2. getMethodSignature(Method method)
3. getMethodSignature(Method method)
4. getMethodSignature(Method method)
5. getMethodSignature(Method method)
6. getMethodSignatureWithLongTypeNames(Method method)
7. getMethodWithSignature(Class clazz, String methodName, Class[] params)