cherry.foundation.testtool.invoker.InvokerImpl.java Source code

Introduction

Here is the source code for cherry.foundation.testtool.invoker.InvokerImpl.java

Source

/*
 * Copyright 2015 agwlvssainokuni
 *
 * 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 cherry.foundation.testtool.invoker;

import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.util.List;

import org.apache.commons.lang3.StringUtils;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.ObjectMapper;

public class InvokerImpl implements Invoker, ApplicationContextAware {

    private ObjectMapper objectMapper;

    private ApplicationContext appCtx;

    public void setObjectMapper(ObjectMapper objectMapper) {
        this.objectMapper = objectMapper;
    }

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) {
        this.appCtx = applicationContext;
    }

    @Override
    public String invoke(String beanName, Class<?> beanClass, Method method, List<String> args,
            List<String> argTypes) {
        try {

            Object targetBean;
            if (StringUtils.isEmpty(beanName)) {
                targetBean = appCtx.getBean(beanClass);
            } else {
                targetBean = appCtx.getBean(beanName, beanClass);
            }

            Type[] paramType = method.getGenericParameterTypes();
            Object[] param = new Object[paramType.length];
            for (int i = 0; i < paramType.length; i++) {
                String arg = getOrNull(args, i);
                String argType = getOrNull(argTypes, i);
                JavaType javaType;
                if (StringUtils.isNotEmpty(argType)) {
                    javaType = objectMapper.getTypeFactory().constructFromCanonical(argType);
                } else {
                    javaType = objectMapper.getTypeFactory().constructType(paramType[i]);
                }
                param[i] = resolve(arg, javaType);
            }

            Object result = method.invoke(targetBean, param);
            return convert(result);
        } catch (InvocationTargetException | IllegalAccessException | IOException ex) {
            throw new IllegalStateException(ex);
        }
    }

    private String getOrNull(List<String> list, int index) {
        if (list == null) {
            return null;
        } else if (list.size() <= index) {
            return null;
        } else {
            return list.get(index);
        }
    }

    private Object resolve(String arg, JavaType paramType) throws JsonProcessingException, IOException {
        if (arg == null) {
            return null;
        }
        return objectMapper.readValue(arg, paramType);
    }

    private String convert(Object result) throws JsonProcessingException {
        return objectMapper.writeValueAsString(result);
    }

}