Sun CodeModel通用方法 [英] Sun CodeModel generic method
本文介绍了Sun CodeModel通用方法的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
有谁知道使用CodeModel生成以下通用方法声明:
public< T> T getValue(Class< T> clazz){...}
用法:
ValueType value = getValue(ValueType.class);
似乎不会被现有的暗示处理。
我知道我可以如下处理代码,但它需要强制转换:
public Object getValue(Class class ){...}
用法:
ValueType value =(ValueType)getValue(ValueType.class);
显然这是因为剧组的混乱。
Object 返回类型创建方法,Generify方法,然后覆盖返回类型。 >
final JDefinedClass exampleClass = codeModel._class(com.example.ExampleClass);
final JMethod method = exampleClass.method(JMod.PUBLIC,Object.class,getValue);
final JTypeVar t = method.generify(T);
method.type(t);
method.param(codeModel.ref(Class.class).narrow(t),type);
method.body()._ return(JExpr._null());
Does anyone know to to generate the following generic method declaration using CodeModel:
public <T> T getValue(Class<T> clazz){...}
usage:
ValueType value = getValue(ValueType.class);
Seems not to be handled by the existing implmentation.
I know I could handle the code as follows, but it requires a cast:
public Object getValue(Class class){...}
usage:
ValueType value = (ValueType)getValue(ValueType.class);
Obviously this is a bit messy because of the cast.
解决方案
Create the method with an Object
return type, generify the method, then overwrite the return type.
final JDefinedClass exampleClass = codeModel._class( "com.example.ExampleClass" );
final JMethod method = exampleClass.method( JMod.PUBLIC, Object.class, "getValue" );
final JTypeVar t = method.generify( "T" );
method.type( t );
method.param( codeModel.ref( Class.class ).narrow( t ), "type" );
method.body()._return(JExpr._null());
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