Java Reflection Method Getter Get getGetterShorthandName(Method method)

Description

get Getter Shorthand Name

License

Apache License

Declaration

public static String getGetterShorthandName(Method method) 

Method Source Code

//package com.java2s;
/* Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * /* w  ww  .  j  a v a  2 s.  co  m*/
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.lang.reflect.Method;

import java.util.Locale;
import java.util.regex.Pattern;

public class Main {
    private static final Pattern GETTER_PATTERN = Pattern.compile("(get|is)[A-Z].*");

    public static String getGetterShorthandName(Method method) {
        if (!isGetter(method)) {
            return method.getName();
        }

        String name = method.getName();
        if (name.startsWith("get")) {
            name = name.substring(3);
            name = name.substring(0, 1).toLowerCase(Locale.ENGLISH) + name.substring(1);
        } else if (name.startsWith("is")) {
            name = name.substring(2);
            name = name.substring(0, 1).toLowerCase(Locale.ENGLISH) + name.substring(1);
        }

        return name;
    }

    public static boolean isGetter(Method method) {
        String name = method.getName();
        Class<?> type = method.getReturnType();
        Class<?> params[] = method.getParameterTypes();

        if (!GETTER_PATTERN.matcher(name).matches()) {
            return false;
        }

        // special for isXXX boolean
        if (name.startsWith("is")) {
            return params.length == 0 && type.getSimpleName().equalsIgnoreCase("boolean");
        }

        return params.length == 0 && !type.equals(Void.TYPE);
    }

    private static boolean matches(Class<?>[] parameterTypes, Object[] args) {
        if ((parameterTypes == null) || (parameterTypes.length == 0)) {
            return ((args == null) || (args.length == 0));
        }
        if ((args == null) || (parameterTypes.length != args.length)) {
            return false;
        }
        for (int i = 0; i < parameterTypes.length; i++) {
            if ((args[i] != null) && !parameterTypes[i].isAssignableFrom(args[i].getClass())) {
                return false;
            }
        }
        return true;
    }
}

Related

1. getGetters(final Class clazz)
2. getGetters(Object bean)
3. getGetters(Object obj)
4. getGettersAndSetters(Object obj)
5. getGetterSetterMethodsParameterType(Field f)
6. getGettersMethods(Object object)
7. getGetterValue(Method method, Object o)
8. getGetterWithPrefix(final Class target, final String property, final String prefix)