Package io.jmix.dynmodelflowui.impl

Class ViewComponentTagCapabilities

java.lang.Object

io.jmix.dynmodelflowui.impl.ViewComponentTagCapabilities

@Component("dynmod_ViewComponentTagCapabilities")
public class ViewComponentTagCapabilities
extends Object

Answers which behavior handler triggers a view XML tag can serve, so the Admin UI handler editor can offer only the components a trigger can actually attach to.

The answer is derived from the same interfaces DynamicViewBehaviorManager tests at runtime: ClickNotifier for click, and SupportsTypedValue or HasValue for valueChange. The component class behind a tag is resolved through LoaderResolver, which honors application-registered custom tags and overrides of built-in ones, and then read from the loader's ComponentLoader type argument — no component is instantiated.

A tag whose component class cannot be pinned down serves neither trigger: when the tag has no loader of its own, or the loader's type argument is missing or as unspecific as the base component type, nothing supports offering it, and such an element is unlikely to be a usable target. It is left out of the dropdown; the editor's combo still accepts a typed value, so it stays reachable by hand.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final record	ViewComponentTagCapabilities.Capabilities	What a tag can be used for.

Field Summary

Fields

Modifier and Type	Field	Description
protected final Map<String,ViewComponentTagCapabilities.Capabilities>	cache	The component registry is populated once on context refresh and does not change afterwards, so a resolved tag stays valid for the lifetime of the application.
protected LoaderResolver	loaderResolver
protected static final ViewComponentTagCapabilities.Capabilities	UNRESOLVED	Reported for a tag whose component class cannot be pinned down: offered for neither trigger.

Constructor Summary

Constructors

Constructor	Description
ViewComponentTagCapabilities()

Method Summary

Modifier and Type	Method	Description
ViewComponentTagCapabilities.Capabilities	get(String tag)	Returns what the given view XML tag can be used for.
protected ViewComponentTagCapabilities.Capabilities	resolve(String tag)
protected @Nullable Class<?>	resolveComponentClass(String tag)	Resolves the component class declared by the loader registered for the tag, or null when the tag has no loader or the loader does not name a component type.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

UNRESOLVED

protected static final ViewComponentTagCapabilities.Capabilities UNRESOLVED

Reported for a tag whose component class cannot be pinned down: offered for neither trigger.

loaderResolver

@Autowired
protected LoaderResolver loaderResolver

cache

protected final Map<String,ViewComponentTagCapabilities.Capabilities> cache

The component registry is populated once on context refresh and does not change afterwards, so a resolved tag stays valid for the lifetime of the application.

Constructor Details

ViewComponentTagCapabilities

public ViewComponentTagCapabilities()

Method Details

get

public ViewComponentTagCapabilities.Capabilities get(String tag)

Returns what the given view XML tag can be used for. Never throws.

Parameters:

tag - view XML element name, such as button or textField

resolve

protected ViewComponentTagCapabilities.Capabilities resolve(String tag)

resolveComponentClass

protected @Nullable Class<?> resolveComponentClass(String tag)

Resolves the component class declared by the loader registered for the tag, or null when the tag has no loader or the loader does not name a component type.