Adobe 38043740 - ColdFusion Standard - Mac Development Manual page 1165

DEVELOPING COLDFUSION 9 APPLICATIONS
Using Web Elements and External Objects
<!--- create a .NET Hashtable --->
<cfset table = createObject(".NET", "System.Collections.Hashtable")>
<!--- call HashTable.add(Object, Object) method for all primitives --->
<cfset table.add("shortVar", javacast("short", 10))>
<cfset table.add("sbyteVar", javacast("byte", 20))>
<cfset table.add("intVar", javacast("int", 123))>
<cfset table.add("longVar", javacast("long", 1234))>
<cfset table.add("floatVar", javacast("float", 123.4))>
<cfset table.add("doubleVar", javacast("double", 123.4))>
<cfset table.add("charVar", javacast("char", 'c'))>
<cfset table.add("booleanVar", javacast("boolean", "yes"))>
<cfset table.add("StringVar", "Hello World")>
<cfset table.add("decimalVar", javacast("bigdecimal", 123234234.505))>
<!--- call HashTable.add(Object, Object) for unsigned primitive types. --->
<cfset boxedByte = createObject(".NET", "System.BoxedByte").init(10)>
<cfset table.add("byteVar", boxedByte)>
<cfset boxedUShort = createObject(".NET", "System.BoxedUShort").init(100)>
<cfset table.add("ushortVar", boxedUShort)>
<cfset boxedUInt = createObject(".NET", "System.BoxedUInt").init(123)>
<cfset table.add("uintVar", boxedUInt)>
<cfset boxedULong = createObject(".NET", "System.BoxedULong").init(123123)>
<cfset table.add("ulongVar", boxedULong)>
<cfdump var="#DotNetToCFType(table)#">
Any other .NET objects can be passed as it is.
Handling ambiguous type conversions
ColdFusion cannot determine the correct data type conversion if a method has multiple signatures with the same
number of parameters that differ only in the parameter data types. In this case, use the JavaCast method to convert the
ColdFusion data to the Java type that corresponds to the .NET type.
For example, if a .NET class has methods myFunc(ulong) and myFunc(int), use the
ColdFusion variable to the Java float or int data type, as the following line shows:
myFunc(JavaCast(int, MyVar));
Similarly, if a .NET class has methods myFunc(int) and myFunc(String), use the
ColdFusion variable to the Java int or String data type, as shown in the following line:
myFunc(JavaCast(String, "123");
In some cases, the
JavaCast
.NET types. In these cases, ColdFusion creates a proxy with only one method, which uses the .NET data type that
corresponds directly to a Java type.
For example, if the .NET class has methods myFunc(ulong) and myFunc(float), the generated proxy has only one
method. This method calls myFunc(float), because the Java float type used to handle ColdFusion floating-point
numbers corresponds directly to the .NET float type. In this case, you can never call the .NET myFunc(ulong) method.
function cannot eliminate ambiguity because a single Java type corresponds to multiple
Last updated 1/20/2012
method to convert your
JavaCast
method to convert your
JavaCast
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