groovy - Groovy 类工厂模式给出了奇怪的错误

Question

我是 groovy 的新手，我正在尝试一些 groovy 代码。我有这种情况。我有以下模块

package com.utils

abstract class Base {

    static String data = ''

}

package com.utils

class A extends Base {

    static String data = 'dummy'

}

package com.utils

class B extends Base {

    static String data = 'dummy'

}

package com.utils

class ShapeFactory {
    static Map <String,Object> shapes = [
        "a": A,
        "b": B
    ]

    static Object get_shapes(String shape) {
        return shapes.get(shape);
    }
}

And in the main file I am using

在主文件中，这里是它失败并出现奇怪错误的地方。我无法确定原因，我将不胜感激。

import com.utils.ShapeFactory

def shapeA = ShapeFactory.get_shapes('a')

shapeA.data // here it fails with the below error

hudson.remoting.ProxyException: org.codehaus.groovy.runtime.typehandling.GroovyCastException: 
Cannot cast object '[]' with class 'java.util.ArrayList' to class 'java.util.Map' 
due to: groovy.lang.GroovyRuntimeException: 
Could not find matching constructor for: java.util.Map()

任何帮助将不胜感激，谢谢

标签： groovyjenkins-groovy

Answer 1

抱歉，我发现了问题，在 Base 类中，我还有一个 Map 变量，它被初始化为一个数组

abstract class Base {
   static String data = ''
   static Map mapper = []  // This has to be [:]
}