Class MediaContext

All Implemented Interfaces:
Serializable, Comparable

public class MediaContext extends GeneratedMediaContext
Container for holding format mappings.
Since:
3.0-u5
See Also:
  • Constructor Details

    • MediaContext

      public MediaContext()
  • Method Details

    • createItem

      protected Item createItem(SessionContext ctx, ComposedType type, Item.ItemAttributeMap allAttributes) throws JaloBusinessException
      Description copied from class: Item
      Has to be implemented for each concrete subtype of item. This method is responsible for creating a new item instance ( by calling managers, ejb homes, etc. ) during ComposedType.newInstance(Map).

      In case this method uses any of the attribute values during creation it is required to override Item.getNonInitialAttributes(SessionContext, ItemAttributeMap) too.
      Sn example:

      
       public static final String MY_ATTRIBUTE = "someAttribute"; ... protected Item createItem(SessionContext
       ctx, ComposedType type, Map allAttributes ) throws JaloBusinessException { MyManager man = ... return
       man.createMyItem( (String)allAttributes.get(MY_ATTRIBUTE) );
       // here MY_ATTRIBUTE is used for creation, so it must not be set again } protected Map getNonInitialAttributes(
       SessionContext ctx, Map allAttributes ) { // let superclass remove its own initial attributes Map ret =
       super.getNonInitialAttributes( ctx, allAttributes );
       // remove MY_ATTRIBUTE from all attributes since if has already been set ret.remove(MY_ATTRIBUTE); return ret; }
      
       
      Overrides:
      createItem in class GenericItem
      Parameters:
      ctx - the current session context which this item is created within
      type - the actual item type ( since subtypes may not provide a own jalo class this may be different from the type which this method was implemented for )
      Returns:
      the new item instance
      Throws:
      JaloBusinessException - indicates an error during creation - any changes will be rollbacked
    • getTargetFormat

      public MediaFormat getTargetFormat(MediaFormat source)
      Gets the format to which given format is mapped.
      Parameters:
      source - format for which a mapped format is needed
      Returns:
      mapped format or null if no mapping for given format is defined
    • setMappings

      public void setMappings(SessionContext ctx, Collection<MediaFormatMapping> value) throws JaloInvalidParameterException
      Sets given format mappings for this container.
      Overrides:
      setMappings in class GeneratedMediaContext
      value - the mappings
      Throws:
      JaloInvalidParameterException - thrown if two mapping have same source format
    • addToMappings

      public void addToMappings(SessionContext ctx, MediaFormatMapping value) throws JaloInvalidParameterException
      Adds a format mapping to the context.
      Overrides:
      addToMappings in class GeneratedMediaContext
      value - the item to add to mappings
      Throws:
      JaloInvalidParameterException - a mapping with same source format already exists