com.lambdaworks.redis.dynamic.support.StandardReflectionParameterNameDiscoverer Maven / Gradle / Ivy

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Advanced and thread-safe Java Redis client for synchronous, asynchronous, and reactive usage. Supports Cluster, Sentinel, Pipelining, Auto-Reconnect, Codecs and much more.

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/*
 * Copyright 2011-2016 the original author or authors.
 *
 * 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
 *
 *      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.
 */
package com.lambdaworks.redis.dynamic.support;

import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.lang.reflect.Parameter;

/**
 * {@link ParameterNameDiscoverer} implementation which uses JDK 8's reflection facilities for introspecting parameter names
 * (based on the "-parameters" compiler flag).
 *
 * @see java.lang.reflect.Parameter#getName()
 */
public class StandardReflectionParameterNameDiscoverer implements ParameterNameDiscoverer {

    @Override
    public String[] getParameterNames(Method method) {
        Parameter[] parameters = method.getParameters();
        String[] parameterNames = new String[parameters.length];
        for (int i = 0; i < parameters.length; i++) {
            Parameter param = parameters[i];
            if (!param.isNamePresent()) {
                return null;
            }
            parameterNames[i] = param.getName();
        }
        return parameterNames;
    }

    @Override
    public String[] getParameterNames(Constructor ctor) {
        Parameter[] parameters = ctor.getParameters();
        String[] parameterNames = new String[parameters.length];
        for (int i = 0; i < parameters.length; i++) {
            Parameter param = parameters[i];
            if (!param.isNamePresent()) {
                return null;
            }
            parameterNames[i] = param.getName();
        }
        return parameterNames;
    }

}