在Grails中应用Groovy扩展会为String#toBoolean()生成MissingMet

Groovy具有adding methods to the existing classes的功能,我找到了some interesting.

然后我discovered我需要自定义我的Grails引导程序来加载它们,所以我添加：

def init = { servletContext -> addExtensionModules() }

  def addExtensionModules() {

    Map<CachedClass,List<MetaMethod>> map = [:]
    ClassLoader classLoader = Thread.currentThread().contextClassLoader
    try {
      Enumeration<URL> resources = classLoader.getResources(MetaClassRegistryImpl.MODULE_META_INF_FILE)
      for (URL url in resources) {
        if (url.path.contains('groovy-all')) {
          // already registered
          continue
        }
        Properties properties = new Properties()
        InputStream inStream
        try {
          inStream = url.openStream()
          properties.load(inStream)
          GroovySystem.metaClassRegistry.registerExtensionModuleFromProperties(properties,classLoader,map)
        }
        catch (IOException e) {
          throw new GroovyRuntimeException("Unable to load module META-INF descriptor",e)
        } finally {
          inStream?.close()
        }
      }
    }  catch (IOException ignored) {}
    map.each { CachedClass cls,List<MetaMethod> methods ->
    cls.setNewMopMethods(methods)
  }
}

我添加了BuildConfig.groovy

compile ('ca.redtoad:groovy-crypto-extensions:0.2') {
  excludes 'groovy-all'
}

问题

问题是现在我不能使用Groovy String的toBoolean()方法：

groovy.lang.MissingMethodException: No signature of method:
java.lang.String.toBoolean() is applicable for argument types: ()
values: [] Possible solutions: asBoolean(),asBoolean(),toFloat(),
toDouble()

由于groovy已经注册,为什么缺少这种方法？我正在使用Grails 2.2.4.

编辑

在一个groovy 2.0.8控制台中测试,代码可以工作,所以可能与Grails有关.

@Grab('ca.redtoad:groovy-crypto-extensions:0.2')
@GrabExclude('org.codehaus.groovy:groovy-all')

addExtensionModules() //same method of BootStrap,ommited to make shorter.

def key = "password".toKey()
def ciphertext = "some plaintext".bytes.encrypt(key: key)
def x = new String(ciphertext.decrypt(key: key)).toBoolean()
println "S".toBoolean()