Packages:
default
System
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System.Data
System.Data.ActiveRecord
System.Data.ActiveRecord.Relations
System.Data.ActiveRecord.Scaffold
System.Data.ActiveReecord.Scaffold.InputBuilder
System.Data.Commom.Sqlite
System.Data.Common
System.Data.Common.Mssql
System.Data.Common.Mysql
System.Data.Common.Oracle
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System.Util
System.Web
System.Web.Services
System.Web.UI
System.Web.UI.ActiveControls
System.Web.UI.WebControls
System.Web.UI.WebControls.assets
System.Xml


Classes:
Keyword

Class TDataFieldAccessor


TDataFieldAccessor class

TDataFieldAccessor is a utility class that provides access to a field of some data. The accessor attempts to obtain the field value in the following order:

  • If the data is an array, then the field is treated as an array index and the corresponding element value is returned;
  • If the data is a TMap or TList object, then the field is treated as a key into the map or list, and the corresponding value is returned.
  • If the data is an object, the field is treated as a property or sub-property defined with getter methods. For example, if the object has a method called getMyValue(), then field 'MyValue' will retrieve the result of this method call. If getMyValue() returns an object which contains a method getMySubValue(), then field 'MyValue.MySubValue' will return that method call result.

Since: 3.0
Author: Qiang Xue <qiang.xue@gmail.com>

Method Summary
mixed
getDataFieldValue ( mixed $data, mixed $field)
Evaluates the data value at the specified field.

Method Details

getDataFieldValue

public mixed getDataFieldValue (mixed $data , mixed $field )

Evaluates the data value at the specified field.

  • If the data is an array, then the field is treated as an array index and the corresponding element value is returned;
  • If the data is a TMap or TList object, then the field is treated as a key into the map or list, and the corresponding value is returned.
  • If the data is an object, the field is treated as a property or sub-property defined with getter methods. For example, if the object has a method called getMyValue(), then field 'MyValue' will retrieve the result of this method call. If getMyValue() returns an object which contains a method getMySubValue(), then field 'MyValue.MySubValue' will return that method call result.

Input
mixed$datadata containing the field value, can be an array, TMap, TList or object.
mixed$fieldfield value
Output
mixed value at the specified field
Exception
throwsTInvalidDataValueException if field or data is invalid