ItemMapping<TItem,TValue>

Only one of the provided ways to define a mapping can be used at the same time, therefore only one of the properties mapper, mapperFunction and constant should be set on each instance.

This class supports LayoutData<TNode,TEdge,TNodeLabel,TEdgeLabel> implementations and does not usually have to be instantiated by client code explicitly. Instances of this class are properties of concrete LayoutData<TNode,TEdge,TNodeLabel,TEdgeLabel> implementations.

Functions, IMapper<K,V>s and constant values are automatically converted to ItemMapping<TItem,TValue>s. For example:

// Constant
new HierarchicalLayoutData({
  sourceGroupIds: groupId,
})

// Delegate
new HierarchicalLayoutData({
  sourceGroupIds: (edge: IEdge) => edge.tag.sourceGroupId,
})

// Mapper
new HierarchicalLayoutData({ sourceGroupIds: new Mapper() })
// or a JavaScript Map
new HierarchicalLayoutData({ sourceGroupIds: new Map() })

Furthermore, the conversion supports a parameter object to initialize the properties. For example:

// Create a new ItemMapping from a JavaScript Map and initialize its 'mapper' with the new Map.
// This also works for the different properties as well.
new HierarchicalLayoutData({
  sourceGroupIds: new Map(),
})
// Or, instead of providing the specific property, the 'includes' key can be used
new HierarchicalLayoutData({
  sourceGroupIds: {
    includes: new Map(),
  },
})

This class cannot be instantiated