com.adobe.cq.dam.cfm

Interface FragmentData

public interface FragmentData

Represents a piece of content (or data) provided by a content fragment.

In general, FragmentData works as a wrapper around a (generic) Java object that represents the actual value. This avoids using Object in the API and also allows to provide helper functionality to access the generic value in a controlled way.

Values are typed. For more information about data types, see DataType.

Values of a given type - represented by an Object wrapped by FragmentData - may need to be converted to the needs of the client. Basically, getValue(Class) supports to convert each value to a String (and back).

For the conversion to a String the following rules are followed:

• The conversion of numbers is technical, i.e. based on Xxxx.toString()/Xxx.parseXxx rather than NumberFormat
• The conversion of Calendar is based on ISO-8601.

Since:

1.1

Method Summary

Modifier and Type	Method and Description
java.lang.String	getContentType() Returns the content type for textbased data types.
DataType	getDataType() Gets the data type of the value.
java.lang.Object	getValue() Gets the original value as a generic Java object.
<T> T	getValue(java.lang.Class<T> type) Gets the value, converted to the provided type.
boolean	isTypeSupported(java.lang.Class type) Checks if the specified Java data type is supported for calls to getValue(Class) and setValue(Object).
void	setContentType(java.lang.String contentType) Sets the content type for text-based data types.
void	setValue(java.lang.Object value) Sets the value.

Method Detail

getDataType

DataType getDataType()

Gets the data type of the value.

Returns:

The data type

getValue

<T> T getValue(java.lang.Class<T> type)

Gets the value, converted to the provided type.

For information about supported type conversions: see DataType.

Note that this method is supposed to return a suitably converted value for all types where isTypeSupported(Class) returns true

Type Parameters:

T - Describes the type parameter

Parameters:

type - The type the value should be converted to

Returns:

The value; null if the value could not be converted to the provided type

isTypeSupported

boolean isTypeSupported(java.lang.Class type)

Checks if the specified Java data type is supported for calls to getValue(Class) and setValue(Object).

Parameters:

type - The class object representing the type

Returns:

true if the type is supported

getValue

java.lang.Object getValue()

Gets the original value as a generic Java object.

Returns:

The value

setValue

void setValue(java.lang.Object value)
       throws ContentFragmentException

Sets the value.

The general rule is that a non-null value that was retrieved using getValue(Class) needs to be accepted and converted to a suitable original value. Also, every value of a type where isTypeSupported(Class) returns true needs to be accepted and converted accordingly.

Note that for the value to be persisted, ContentElement.setValue(FragmentData) or ContentVariation.setValue(FragmentData) have to be called explicitly. This allows for manipulating the value multiple times before actually persisting it.

Parameters:

value - The value

Throws:

ContentFragmentException - if the type of the value provided is unsupported

getContentType

java.lang.String getContentType()

Returns the content type for textbased data types.

This will return a MIME type only when applicable. For numbers, dates, booleans, it will typically be null.

Returns:

The content type; null if not applicable

setContentType

void setContentType(java.lang.String contentType)

Sets the content type for text-based data types.

For data other than text-based types null should be provided.

Parameters:

contentType - The content type; null if not applicable