Language enhancements in cold fusion 11

© 2011 Adobe Systems Incorporated. All Rights Reserved. Adobe Confidential.
Language Enhancements in ColdFusion 11 (Splendor)
Ram Kulkarni
1
@ram_kulkarni
ramkulkarni.com

Language Enhancements in ColdFusion 11
§  Full CFScript support
§  Member functions for data types
§  JSON enhancements
§  Query functions
§  Elvis operator
§  Built-in functions as data type
§  Collection functions
§  Application specific dynamic datasource
2

Tags in CFScript
3

Tags in CFScript
§  Can call most tags in cfscript
§  Call tags as functions
§  Name of the function is same as tag name
§  Attributes are passed as name-value pair separated by comma
§  Example
<cfscript>
cfdocument (format="PDF" ,src="report.cfm");
</cfscript>
4

Tags in CFScript– child tags
<cfscript>

cfchart ( format="html")

{

cfchartseries (type="bar", seriescolor="##4dc", label="Sales")

{

cfchartdata (item="Jan" ,value="100" );

cfchartdata (item="Feb" ,value="400" );

cfchartdata (item="Mar" ,value="200" );

cfchartdata (item="Aprl" ,value="500" );

cfchartdata (item="May" ,value="700" );

cfchartdata (item="Jun" ,value="300" );

}

}

</cfscript>

5

Tags in CFScript– using writeoutput
<cfscript>
name = "Ram";
cfsavecontent (variable="var1" )
{
writeOutput("");
writeOutput("Hello #name# !");
}

writeOutput(var1);
</cfscript>
6

Custom Tags in CFScript
Call custom tags in cfscript with “cf_” prefix
<cfscript>
cf_sayHello(name="Ram");
</cfscript>

Using imported custom tags
<cfimport prefix="hello" taglib="customtags">

<cfscript>
hello:sayHello(name="Ram");
</cfscript>
7

Tags not available in CFScript
§  cfscript
§  cfoutput
§  cfdump
§  cfinvoke
§  cfinvokeargument
§  cfobject
§  cfset
8

Data Type Member Functions
9

Member Functions for Data Types
§  Access functions on data types as member functions
Example
<cfscript>
st = {
firstName: "Ram",
lastName: "Kulkarni"
};

writeDump(st.find("firstName"));
//structFind(st,"firstName");

st.append({company:"Adobe"});
//structAppend(st,{company:"Adobe"});

writeDump(st);
</cfscript>
10

Supported Data Types
§  Array
§  Struct
§  List
§  Date
§  String
§  Query
§  Xml
§  Image
§  Spreadsheet
11

JSON Enhancements
12

JSON Enhancements
§  Case of Struct keys now are preserved
§  Select option “Preserve case for Struct keys for Serialization”
in the Administrator->Settings
§  Data types inferred for Query columns and CFC properties
§  Option to serialize Query as Struct
§  Custom Serializers
13

JSON Case Sensitivity
§  Setting case preservation for Struct keys
§  Application Level
§  Server Level
§  Application.cfc setting
component {
this.name = "JSONEnhancements";
this.serialization.preserveCaseForStructKey = true;
}

§  Server setting in ColdFusion Administrator
14

Type of data preserved in CFC and Query
§  ColdFusion is loosely typed language
§  It infers data type based on value assigned
§  But sometime it can get data type wrong
e.g. “0123” could be converted to number 123
§  JSON Serialization for Query
§  Infers data type from column type of Database
§  JSON Serialization for CFC
§  Infers data type from ‘type’ attribute of CFC property
15

Serialize Query as Struct
§  Before ColdFusion 11
§  serializeJSON (object [,boolean queryFormat])
§  In ColdFusion 11
§  serializeJSON (object [, object queryFormat])
§  Second argument could be
§  True, False, “row”, “column”, “struct”
§  Application.cfc setting
component {
this.serialization.serializeQueryAs = "struct";
}
16

Custom Serializer
§  New serialize functions
§  serialzeXML and deserializeXML
§  serializeJSON and deserializeJSON already existed
§  Set custom serializer in Application.cfc
component {
this.customSerializer = "MyJSONSerializer";
}

§  Create a CFC for custom serialization and implement following functions –
function canSerialize (type) access="remote" returntype="boolean”
function serialize (objToSerialize, acceptHeader) access="remote" returntype="String”
function canDeSerialize (type) access="remote" returntype="boolean"
function deSerialize (objToSerialize, acceptHeader) access="remote" returntype="String"

17

Query Functions
18

queryExecute
§  Syntax
queryExecute (sql [,queryParams] [,queryOptions])
§  Examples:
<cfscript>
rs = queryExecute("select * from employee",[], {datasource:”EmployeeDS”}); 

rs = queryExecute("select * from employee where id = ?", [1]); 

rs = queryExecute("select * from employee where id = :empId", {empId:1}); 

rs = queryExecute("select * from employee where id = :empId", {empId:
{type="integer", value=1}}); 

rs = queryExecute("select * from employee where id = :empId and first_name
like :firstName", {empId:1, firstName:"Ram"});
</cfscript>
19

queryGetRow Function
§  Retrieves specific query row
§  Result is returned as Struct
§  Throws RowNumberOutOfBoundException if index is greater than num rows
§  Syntax:
row = queryGetRow (queryObj, rowIndex) OR
row = queryObj.getRow(rowIndex)
<cfscript>
queryObj = queryExecute("select * from employee order by first_name");

writeDump(queryObj);
writeDump(queryObj.getRow(2));
writeDump(queryGetRow(queryObj, 1));
</cfscript>
20

Other Language Enhancements
21

Elvis Operator
§  Special case of Ternary operator - ?:
<cfscript>
var1 = isDefined("var2") ? var2 : "defaultValue";
writeOutput(var1 & " ");

var1 = var2 ?: "defaultValue";
writeOutput(var1);
</cfscript>

Output is the same – “defaultValue”
22

Build-in functions as data types
§  Pass built-in function as function argument
§  Return built-in function from a function
§  Assign built-in function to a variable
You could do all of above with UDFs earlier, now supported for built-in functions
<cfscript>
a = [10, 44, 55, 60];

function arrayOperation (opFunc)
{
return opFunc(a);
}

writeOutput("Array Max = " & arrayOperation(arrayMax) & " ");
writeOutput("Array Min = " & arrayOperation(arrayMin) & " ");
writeOutput("Array Average = " & arrayOperation(arrayAvg) & " ");
§  </cfscript>
23

Enhancements to collection functions
§  Index and array object arguments added to closure function of arrayEach
§  arrayEach(array, function (arrayElement, index, arrayObj) { … });
§  New function listEach
§  listEach
(
list/String,
function (listObj, index){}
[, delimiters_string]
[, includeEmpltyFields_boolean]
)
24

Enhancements to collection functions - Continued
§  arrayReduce
§  arrayReduce (arrayObj, function(prevResult,item, index, arrayObj){});
§  Returns a single value
§  arrayMap
§  arrayMap (arrayObj, function (item, index, arrayObj){});
§  Replaces value of array element at given index and returns new array
§  Similarly structReduce, structMap, listReduce and listMap are added
25

Application Specific Datasource
§  Ways to create datasource
§  In the Administrator
§  Using Admin API
§  CF11 – New way to create dynamic datasources
§  In application.cfc
this.datasources.myDataSource = {
database = “path_to_folder",
driver = "Apache Derby Embedded"
};
this.datasource = "myDataSource";
26

Application specific datasource – continued …
§  Creating datasource using JDBC URL
this.datasources.dsn2={"driver"="MSSQLServer",
url="jdbc:macromedia:sqlserver://localhost
MSSQL2008;databaseName=regression;;sendStringParametersAsUnicode=false;querytimeout=0;M
axPooledStatements=1000","username"="sa","password"="pass"};
§  In case of clash, Application datasource will get preference
27

CFZip Enhancements
§  Support for password protected zip files
§  CFZip – added two attributes
§  password
§  encryptionAlgorithm – Standard, AES-128, AES-256 (default)
<cfscript>
cfzip (action="zip", file="C:ZipTesttestzipfile.zip",
source="C:ZipTestsample.txt", password="pass");

cfzip (action="list", name="zipFileList",
file="C:ZipTesttestzipfile.zip");

cfzip (action="unzip",
file="C:ZipTesttestzipfile.zip",
destination="C:ZipTest", password="pass", overwrite="true");
</cfscript>
28

CFZip Enhancements
§  Can specify password for individual files
<cfscript>
cfzip(action="zip",
file="C:ZipTesttestzipfile.zip", overwrite="true")
{
cfzipparam(source="C:ZipTestsample.txt", password="pass");
};

cfzip(action="unzip", file="C:ZipTesttestzipfile.zip",
destination="C:ZipTest", overwrite="true")
{
cfzipparam(source="sample.txt", password="pass");
};
</cfscript>
29

Thank you
30

Language enhancements in cold fusion 11

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