要获得helper方法的完整列表,请参考类org.codehaus.groovy.transform.stc.GroovyTypeCheckingExtensionSupport和类org.codehaus.groovy.transform.stc.TypeCheckingExtension。但是,要特别注意以下方法: isDynamic: 接受VariableExpression作为参数,如果变量是DynamicExpression则返回true,这意味着在脚本中,它不是使用类型或def定义...
def person = new Person(name:'tom',age:23)//调用一个没有的方法//会报 groovy.lang.MissingMethodException 异常person.show()//输出Caught: groovy.lang.MissingMethodException: No signature of method: variable.Person.show() is applicable for argument types: () values: [] //重写invokeMethod()方...
对于较简单的变量,或者 variable.property,甚至还可以去掉大括号。 throw new Exception("Unable to convert resource: $resource")甚至还可以使用 ${→ resource } 和闭包形式来拖延计算那些表达式。当 GString 被迫转换为字符串时,就会计算闭包,获得返回值的 toString() 表示形式。
如下例所示: def binding = new Binding() 1⃣️ def shell = new GroovyShell(binding) 2⃣️ binding.setVariable('x',1) 3⃣️ binding.setVariable('y',3) shell.evaluate 'z=2*x+y' 4⃣️ assert binding.getVariable('z') == 5 5⃣️ ...
A type can be assigned to each input field that defines the type of the Groovy variable in the script. If necessary, a type conversion of the input data is done before the script is executed (with the exception of Object type, which does no conversion and keeps the input type). This ...
在大括号里面,你可以放入任何类型的表达式,而不仅仅是变量。譬如,简单的变量、variable.property,你甚至可以去掉大括号: throw new Exception("Unable to convert resource: $resource") 1. 你甚至可以通过闭包${-> resource }来延迟执行这些表达式。当GString被强制转换为String时,它将执行闭包然后调用toString()方法...
CheckingVisitor提供的功能外,类型检查DSL脚本还从org.codehaus.groovy.ast.ClassHelper和org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport导入静态成员,允许通过OBJECT_TYPE、STRING_TYPE、THROWABLE_TYPE等对公共类型进行访问,并检查诸如missesgenericsttypes(ClassNode)、isClassClassNodeWrappingConcreteType(Class...
.power(2,3)///importgroovy.transform.TypeChecked//类型检测@TypeCheckedIntegertestTypeCheck(){//[Static type checking] -//Cannot assign value of type java.lang.String to variable of type java.lang.IntegerInteger num="1"returnnum}///importgroovy.transform.CompileStatic//静态方法@CompileStaticint...
Static and dynamic typing (when the type of a variable is interpreted at runtime) Operator overloading Associative arrays Expressions embedded inside strings Safe navigation operator “?.”to check automatically for nulls – which make sense, due to NullPointerException beingthe most common exception...
Variable annotation used for changing the scope of a variable within a script from being within the run method of the script to being at the class level for the script. The annotated variable will become a private field of the script class. The type of the field will be the same as the...