Just trying to implement the Typesafe Enum Design Pattern in ColdFusion,
and am looking for some feedback/input on the following code.
I have tried to get some feedback before on the Singleton design pattern,
but got not one response, so I am thinking;
1. This is not the list to post to for feedback, only problems.
2. There is no interest in these type of posts.
3. I was so way off that it wasn't even worth replying.
4. Fill in......
So here is another go at another design pattern..
Following is the code to call the CFC
**************
<cfscript>
DataType = createObject( "component",
"_resource.class.database.microsoftSQLServer.DataType" ).init();
</cfscript>
<cfoutput>
<cfdump var="#DataType.INTEGER.getLower()#">
<cfdump var="#DataType.BIGINT.getUpper()#">
<cfscript>
for ( Constant in DataType.instance )
{
writeOutput( DataType.instance[ Constant ].getLower() & "<br/>" );
}
</cfscript>
<cfdump var="#DataType#">
</cfoutput>
**************
Following is the CFC itself
**************
<cfcomponent
displayname="DataType"
hint="This CFC implements the Typesafe Enum Design Pattern"
output="false"
author="Taco Fleur ([EMAIL PROTECTED])">
<!---
This CFC would be a good candidate for the singleton pattern
on the other hand it won't be called that much, so it might be a waste
in the server scope
--->
<!---
Define: Is A
Define: Has A
--->
<!--- Declare properties for this Object --->
<cfproperty
name="upper"
access="private"
type="any"
displayname="Upper"
hint="Holds the upper value of the constant."
required="true" />
<cfscript>
this.instance = structNew();
</cfscript>
<cffunction
name="init"
access="public"
returntype="DataType">
<cfscript>
// Public static
newConstant( name = "BIGINT", lower = -9223372036854775808, upper
= 9223372036854775807, type = "numeric" );
newConstant( name = "INTEGER", lower = -2147483648, upper =
2147483647, type = "numeric" );
newConstant( name = "SMALLINT", lower = -32768, upper = 32767,
type = "numeric" );
newConstant( name = "TINYINT", lower = 0, upper = 255, type =
"numeric" );
newConstant( name = "BIT", lower = 0, upper = 1, type = "numeric"
);
newConstant( name = "DECIMAL", lower = "-10^38+1", upper =
"10^38-1", type = "numeric" );
// Same as Decimal constant
structInsert( this, "NUMERIC", this.DECIMAL, false );
newConstant( name = "MONEY", lower = -922337203685477.5808, upper
= 922337203685477.5807, type = "numeric" );
newConstant( name = "SMALLMONEY", lower = -214748.3648, upper =
214748.3647, type = "numeric" );
newConstant( name = "FLOAT", lower = -1.79E+308, upper =
1.79E+308, type = "numeric" );
newConstant( name = "REAL", lower = -3.40E+38, upper = 3.40E+38,
type = "numeric" );
newConstant( name = "DATETIME", lower = createDate( 1753, 1, 1 ),
upper = createDate( 9999, 12, 31 ), type = "date" );
newConstant( name = "SMALLDATETIME", lower = createDate( 1900, 1,
1 ), upper = createDate( 2079, 6, 6 ), type = "date" );
newConstant( name = "CHAR", lower = 0, upper = 8000, type =
"string" );
newConstant( name = "TEXT", lower = 0, upper = 8000, type =
"string" );
newConstant( name = "VARCHAR", lower = 0, upper = 2147483647, type
= "string" );
newConstant( name = "NCHAR", lower = 0, upper = 4000, type =
"string" );
newConstant( name = "NVARCHAR", lower = 0, upper = 4000, type =
"string" );
newConstant( name = "BINARY", lower = 0, upper = 8000, type =
"string" );
newConstant( name = "VARBINARY", lower = 0, upper = 8000, type =
"string" );
newConstant( name = "IMAGE", lower = 0, upper = 2147483647, type =
"string" );
// Return the instance of the Object
return this;
</cfscript>
</cffunction>
<cffunction
name="newConstant"
access="package"
returntype="DataType">
<cfargument
name="name"
type="string"
required="yes"
hint="The name of the constant." />
<cfargument
name="upper"
type="any"
required="yes"
hint="The upper value of the constant." />
<cfargument
name="lower"
type="any"
required="yes"
hint="The lower value of the constant." />
<cfargument
name="type"
type="string"
required="yes"
hint="The type of the constant." />
<cfscript>
structInsert( this, arguments.name, createObject( "component",
"DataType" ).setConstant( lower = arguments.lower, upper = arguments.upper,
type = arguments.type ), false );
// Create a reference in the this.instance structure
structInsert( this.instance, arguments.name, this[ arguments.name
], false );
return this;
</cfscript>
</cffunction>
<cffunction
name="setConstant"
access="package"
returntype="DataType">
<cfargument
name="upper"
type="any"
required="yes"
hint="The upper value of the constant." />
<cfargument
name="lower"
type="any"
required="yes"
hint="The lower value of the constant." />
<cfargument
name="type"
type="string"
required="yes"
hint="The type of the constant." />
<cfscript>
setUpper( upper = arguments.upper );
setLower( lower = arguments.lower );
setType( type = arguments.type );
return this;
</cfscript>
</cffunction>
<cffunction
name="setUpper"
access="public"
returntype="void">
<cfargument
name="upper"
type="any"
required="yes"
hint="The upper value of the constant." />
<cfscript>
variables.upper = arguments.upper;
</cfscript>
</cffunction>
<cffunction
name="getUpper"
access="public"
returntype="any">
<cfscript>
return variables.upper;
</cfscript>
</cffunction>
<cffunction
name="setLower"
access="public"
returntype="void">
<cfargument
name="lower"
type="any"
required="yes"
hint="The lower value of the constant." />
<cfscript>
variables.lower = arguments.lower;
</cfscript>
</cffunction>
<cffunction
name="getLower"
access="public"
returntype="any">
<cfscript>
return variables.lower;
</cfscript>
</cffunction>
<cffunction
name="setType"
access="public"
returntype="void">
<cfargument
name="type"
type="string"
required="yes"
hint="The type of the constant." />
<cfscript>
variables.type = arguments.type;
</cfscript>
</cffunction>
<cffunction
name="getType"
access="public"
returntype="numeric">
<cfscript>
return variables.type;
</cfscript>
</cffunction>
</cfcomponent>
Taco Fleur
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