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  11. CFML Reference
    1. Introduction to CFML Reference
      1. New functions in ColdFusion (2018 release)
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      3. Script supported tags and functions
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    2. Reserved words and variables
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    5. Ajax JavaScript functions
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      5. ColdFusion.Layout.enableSourceBind
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      9. JavaScriptFunctionsinColdFusion9Update1
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    8. Application.cfc reference
      1. Application.CFC reference
      2. Application variables
      3. Method summary
      4. onAbort
      5. onApplicationEnd
      6. onApplicationStart
      7. onMissingTemplate
      8. onCFCRequest
      9. onError
      10. onRequestEnd
      11. onRequest
      12. onRequestStart
      13. onServerStart
      14. onSessionEnd
      15. onSessionStart
    9. Script functions implemented as CFCs
      1. Script Functions Implemented as CFCs
      2. Accessing the functions
      3. Function summary
      4. ftp
      5. http
      6. mail
      7. pdf
      8. query
      9. Script functions implemented as CFCs in ColdFusion 9 Update 1
      10. storedproc
    10. ColdFusion Flash Form style reference
      1. Styles valid for all controls
      2. Styles for cfform
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      8. Styles for cfinput with radio, checkbox, button, image, or submit type attributes
      9. Styles for cftextarea tag and cfinput with text, password, or hidden type attributes
      10. Styles for cfselect with size attribute value of 1
      11. Styles for cfselect with size attribute value greater than 1
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      15. ColdFusion Flash Form Style Reference
    11. ColdFusion event gateway reference
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      17. onIMServerMessage
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      21. IM Gateway CFC incoming message methods
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      23. CFML CFEvent structure
      24. warn
      25. info
      26. setOriginatorID
      27. data command
      28. submit Multi command
      29. submit command
      30. setGatewayType
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      32. setData
      33. setCFCListeners
      34. outgoingMessage
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      38. removeBuddy
      39. removeDeny
      40. removePermit
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      44. SMS Gateway CFEvent structure and commands
      45. SMS Gateway incoming message CFEvent structure
      46. getStatusAsString
      47. getProtocolName
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      54. getQueueSize
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      56. getHelper
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      59. getGatewayID_1
      60. getGatewayID
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      64. getCFCPath
      65. getCFCMethod
      66. GatewayServices class
      67. Gateway interface
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      70. addDeny
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      72. error
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      75. stop
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    12. ColdFusion C++ CFX Reference
      1. C++ class overview
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      3. CCFXException class
      4. CCFXQuery class
      5. CCFXRequest class
      6. CCFXStringSet class
      7. ColdFusion C++ CFX Reference
    13. ColdFusion Java CFX reference
      1. ColdFusion Java CFX reference
      2. Class libraries overview
      3. Custom tag interface
      4. Query interface
      5. Request interface
      6. Response interface
      7. Debugging classes reference
    14. WDDX JavaScript Objects
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  12. Develop ColdFusion applications
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      2. About ColdFusion
      3. About Internet applications and web application servers
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    2. Changes in ColdFusion
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      16. Server update using ColdFusion Administrator
      17. Secure Profile for ColdFusion Administrator
    3. Introduction to application development
      1. Introduction to application development using ColdFusion
      2. Using the Developing ColdFusion Applications guide
      3. About Adobe ColdFusion documentation for Developers
    4. The CFML programming language
      1. The CFML programming language
      2. Elements of CFML
      3. ColdFusion variables
      4. Expressions and number signs
      5. Arrays and structures
      6. Extend ColdFusion pages with CFML scripting
      7. Regular expressions in functions
      8. ColdFusion language enhancements
      9. Built-in functions as first class citizen
      10. Data types- Developing guide
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      3. Write and call user-defined functions
      4. Build and use ColdFusion Components
      5. Create and use custom CFML tags
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      8. Object Oriented Programming in ColdFusion
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      3. Handle errors
      4. Use persistent data and locking
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      8. Use the ColdFusion debugger
      9. Debugging and Troubleshooting Applications
      10. Develop globalized applications
      11. REST enhancements in ColdFusion
      12. Authentication through OAuth
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      7. Device detection
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      9. Mobile Templates
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    8. Access and use data
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      5. Use Query of Queries
      6. Manage LDAP directories
      7. Solr search support
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      2. Use ColdFusion Web Sockets
      3. Media Player enhancements
      4. Client-side charting
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      2. Use the Flash Remoting Service
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      4. Offline AIR application support
      5. Proxy ActionScript classes for ColdFusion services
      6. Use LiveCycle Data Services ES assembler
      7. Use server-side ActionScript
    12. Request and present information
      1. Request and present information
      2. Retrieve and format data
      3. Build dynamic forms with cfform tags
      4. Validate data
      5. Create forms in Flash
      6. Create skinnable XML forms
      7. Use Ajax data and development features
      8. Use Ajax User Interface components and features
    13. Office file interoperability
      1. Office file interoperability
      2. Using cfdocument
      3. Using cfpresentation
      4. Using cfspreadsheet
      5. Supported Office conversion formats
      6. SharePoint integration
    14. ColdFusion portlets
      1. ColdFusion portlets
      2. Run a ColdFusion portlet on a JBoss portal server
      3. Run a ColdFusion portlet on a WebSphere portal server
      4. Common methods used in portlet.cfc
      5. ColdFusion portlet components
      6. Support for JSR-286
    15. Work with documents, charts, and reports
      1. Work with documents, charts, and reports
      2. Manipulate PDF forms in ColdFusion
      3. Assemble PDF documents
      4. Create and manipulate ColdFusion images
      5. Create charts and graphs
      6. Create reports and documents for printing
      7. Create reports with Report Builder
      8. Create slide presentations
    16. Use web elements and external objects
      1. Use web elements and external objects
      2. Use XML and WDDX
      3. Use web services
      4. Use ColdFusion web services
      5. Integrate JEE and Java elements in CFML applications
      6. Use Microsoft .NET assemblies
      7. Integrate COM and CORBA objects in CFML applications
    17. Use external resources
      1. Send and receive e-mail
      2. Interact with Microsoft Exchange servers
      3. Interact with remote servers
      4. Manage files on the server
      5. Use event gateways
      6. Create custom event gateways
      7. Use the ColdFusion extensions for Eclipse
      8. Use the data services messaging event gateway
      9. Use the data management event gateway
      10. Use the FMS event gateway
      11. Use the instant messaging event gateways
      12. Use the SMS event gateway

 

public abstract interface Request

Interface to a request made to a CustomTag. The interface includes methods for retrieving attributes passed to the tag (including queries) and reading global tag settings.

Methods

Returns

Syntax

Description

boolean

attributeExists(String name)

Checks whether the attribute was passed to this tag.

boolean

debug()

Checks whether the tag contains the debug attribute.

String

getAttribute(String name)

Retrieves the value of the passed attribute.

String

getAttributeList()

Retrieves a list of attributes passed to the tag.

int

getIntAttribute(String name)

Retrieves the value of the passed attribute as an integer.

int

getIntAttribute(String name, int def)

Retrieves the value of the passed attribute as an integer (returns default if the attribute does not exist or is not a valid number).

Query

getQuery()

Retrieves the query that was passed to this tag.

attributeExists

Description

Checks whether the attribute was passed to this tag. Returns True if the attribute is available; otherwise returns False.

Category

Request interface

Syntax

public boolean attributeExists(String name)

See also

getAttribute, getAttributeList

Parameters

Parameter

Description

name

Name of the attribute to check (case-insensitive)

Example

The following example checks whether the user passed an attribute named DESTINATION to the tag; if not, it throws an exception:

if ( ! request.attributeExists("DESTINATION") )
{
throw new Exception(
"Missing DESTINATION parameter",
"You must pass a DESTINATION parameter in "
"order for this tag to work correctly." ) ;
} ;

debug

Description

Checks whether the tag contains the debug attribute. Use this method to determine whether to write debug information for this request. For more information, see writeDebug. Returns True if the tag contains the debug attribute; False, otherwise.

Category

Request interface

Syntax

public boolean debug()

See also

writeDebug

Example

The following example checks whether the debug attribute is present, and if so, it writes a brief debug message:

if ( request.debug() )
{
response.writeDebug( "debug info" ) ;
}

getAttribute

Description

Retrieves the value of a passed attribute. Returns an empty string if the attribute does not exist (use attributeExists to test whether an attribute was passed to the tag). Use getAttribute(String,String) to return a default value rather than an empty string. Returns the value of the attribute passed to the tag. If no attribute of that name was passed to the tag, an empty string is returned.

Category

Request interface

Syntax

public String getAttribute(String name)

See also

attributeExists, getAttributeList, getIntAttribute

Parameters

Parameter

Description

name

The attribute to retrieve (case-insensitive)

Example

The following example retrieves an attribute named DESTINATION and writes its value back to the user:

String strDestination = request.getAttribute("DESTINATION") ;
response.write( "The destination is: " + strDestination ) ;

getAttributeList

Description

Retrieves a list of attributes passed to the tag. To retrieve the value of one attribute, use the getAttribute method. Returns an array of strings containing the names of the attributes passed to the tag.

Category

Request interface

Syntax

public String[] getAttributeList()

See also

attributeExists

Example

The following example retrieves the list of attributes, then iterates over the list, writing each attribute and its value back to the user:

String[] attribs = request.getAttributeList() ;
int nNumAttribs = attribs.length ;

for( int i = 0; i < nNumAttribs; i++ )
{
String strName = attribs[i] ;
String strValue = request.getAttribute( strName ) ;
response.write( strName + "=" + strValue + "<BR>" ) ;
}

getIntAttribute

Description

Retrieves the value of the passed attribute as an integer. Returns -1 if the attribute does not exist. Use attributeExists to test whether an attribute was passed to the tag. Use getIntAttribute(String,int) to return a default value rather than throwing an exception or returning -1. Returns the value of the attribute passed to the tag. If no attribute of that name was passed to the tag, -1 is returned.

Category

Request interface

Syntax

public int getIntAttribute(String name)

Throws

NumberFormatException if the attribute is not a valid number.

See also

attributeExists, getAttributeList

Parameters

Parameter

Description

name

The attribute to retrieve (case-insensitive)

Example

The following example retrieves an attribute named PORT and writes its value back to the user:

int nPort = request.getIntAttribute("PORT") ;
if ( nPort != -1 )
response.write( "The port is: " + String.valueOf(nPort) ) ;

getQuery

Description

Retrieves the query that was passed to this tag. To pass a query to a custom tag, you use the query attribute. It should be set to the name of a query (created using the cfquery tag). The query attribute is optional and should be used only by tags that process an existing dataset. Returns the Query that was passed to the tag. If no query was passed, returns null.

Category

Request interface

Syntax

public Query getQuery()

Example

The following example retrieves a query that was passed to a tag. If no query was passed, an exception is thrown:

Query query = request.getQuery() ;
if ( query == null )
{
throw new Exception(
"Missing QUERY parameter. " +
"You must pass a QUERY parameter in "
"order for this tag to work correctly." ) ;
}

getSetting

Description

Retrieves the value of a global custom tag setting. Custom tag settings are stored in the CustomTags section of the ColdFusion Registry key.Returns the value of the custom tag setting. If no setting of that name exists, an empty string is returned.

Category

Request interface

Syntax

public String getSetting(String name)

Parameters

Parameter

Description

name

The name of the setting to retrieve (case-insensitive)

Usage

All custom tags implemented in Java share a registry key for storing settings. To avoid name conflicts, preface the names of settings with the name of your custom tag class. For example, the code below retrieves the value of a setting named VerifyAddress for a custom tag class named MyCustomTag:

String strVerify = request.getSetting("MyCustomTag.VerifyAddress") ;
if ( Boolean.valueOf(strVerify) )
{
// Do address verification...
}
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