public static string From(
ICodegenContext context,
Type expectedUnderlyingType,
EventPropertyGetterSPI innerGetter,
AccessType accessType,
Type generator)
{
var block = context.AddMethod(accessType == AccessType.EXISTS ? typeof(bool) : typeof(object),
typeof(object), "value", generator)
.IfNotInstanceOf("value", expectedUnderlyingType)
.IfInstanceOf("value", typeof(EventBean))
.DeclareVarWCast(typeof(EventBean), "bean", "value");
switch (accessType)
{
case AccessType.GET:
block = block.BlockReturn(innerGetter.CodegenEventBeanGet(Ref("bean"), context));
break;
case AccessType.EXISTS:
block = block.BlockReturn(innerGetter.CodegenEventBeanExists(Ref("bean"), context));
break;
case AccessType.FRAGMENT:
block = block.BlockReturn(innerGetter.CodegenEventBeanFragment(Ref("bean"), context));
break;
default:
throw new UnsupportedOperationException("Invalid access type " + accessType);
}
block = block.BlockReturn(Constant(accessType == AccessType.EXISTS ? (object)false : null));
ICodegenExpression expression;
switch (accessType)
{
case AccessType.GET:
expression = innerGetter.CodegenUnderlyingGet(Cast(
expectedUnderlyingType, Ref("value")), context);
break;
case AccessType.EXISTS:
expression = innerGetter.CodegenUnderlyingExists(Cast(
expectedUnderlyingType, Ref("value")), context);
break;
case AccessType.FRAGMENT:
expression = innerGetter.CodegenUnderlyingFragment(
Cast(expectedUnderlyingType, Ref("value")), context);
break;
default:
throw new UnsupportedOperationException("Invalid access type " + accessType);
}
return(block.MethodReturn(expression));
}
public static EventPropertyGetter Compile(
this ICodegenContext codegenContext,
string engineURI,
ClassLoaderProvider classLoaderProvider,
EventPropertyGetterSPI getterSPI,
string propertyExpression)
{
var get = getterSPI.CodegenEventBeanGet(Ref("bean"), codegenContext);
var exists = getterSPI.CodegenEventBeanExists(Ref("bean"), codegenContext);
var fragment = getterSPI.CodegenEventBeanFragment(Ref("bean"), codegenContext);
var singleBeanParam = CodegenNamedParam.From(typeof(EventBean), "bean");
// For: public object Get(EventBean eventBean) ;
// For: public bool IsExistsProperty(EventBean eventBean);
// For: public object GetFragment(EventBean eventBean) ;
var getMethod = new CodegenMethod(typeof(object), "Get", singleBeanParam, null);
getMethod.Statements.MethodReturn(get);
var isExistsPropertyMethod = new CodegenMethod(typeof(bool), "IsExistsProperty", singleBeanParam, null);
isExistsPropertyMethod.Statements.MethodReturn(exists);
var fragmentMethod = new CodegenMethod(typeof(object), "GetFragment", singleBeanParam, null);
fragmentMethod.Statements.MethodReturn(fragment);
var clazz = new CodegenClass(
"com.espertech.esper.codegen.uri_" + engineURI,
typeof(EventPropertyGetter).Name + "_" + CodeGenerationIDGenerator.GenerateClass(),
typeof(EventPropertyGetter),
codegenContext.Members,
new [] { getMethod, isExistsPropertyMethod, fragmentMethod },
codegenContext.Methods
);
string debugInfo = null;
if (codegenContext.IsDebugEnabled)
{
debugInfo = getterSPI.GetType().FullName + " for property '" + propertyExpression + "'";
}
return(codegenContext.Compiler.Compile(
clazz, classLoaderProvider, typeof(EventPropertyGetter), debugInfo));
}