X-Git-Url: https://git.argeo.org/?a=blobdiff_plain;f=org.argeo.api%2Fsrc%2Forg%2Fargeo%2Fapi%2Fcms%2FMvcProvider.java;fp=org.argeo.api%2Fsrc%2Forg%2Fargeo%2Fapi%2Fcms%2FMvcProvider.java;h=c1aa6006c793f2ad024481142f0332c5334524f2;hb=b7683883512d924a039a43c2e1102290aa49f64d;hp=0000000000000000000000000000000000000000;hpb=03f646fd0d7e7ce393694c836c779bc67a4eef55;p=lgpl%2Fargeo-commons.git

diff --git a/org.argeo.api/src/org/argeo/api/cms/MvcProvider.java b/org.argeo.api/src/org/argeo/api/cms/MvcProvider.java
new file mode 100644
index 000000000..c1aa6006c
--- /dev/null
+++ b/org.argeo.api/src/org/argeo/api/cms/MvcProvider.java
@@ -0,0 +1,44 @@
+package org.argeo.api.cms;
+
+import java.util.function.BiFunction;
+
+/**
+ * Stateless UI part creator. Takes a parent view (V) and a model context (M) in
+ * order to create a view part (W) which can then be further configured. Such
+ * object can be used as services and reference other part of the model which
+ * are relevant for all created UI part.
+ */
+@FunctionalInterface
+public interface MvcProvider<V, M, W> extends BiFunction<V, M, W> {
+	W createUiPart(V parent, M context);
+	
+	/**
+	 * Whether this parent view is supported.
+	 * 
+	 * @return true by default.
+	 */
+	default boolean isViewSupported(V parent) {
+		return true;
+	}
+
+	/**
+	 * Whether this context is supported.
+	 * 
+	 * @return true by default.
+	 */
+	default boolean isModelSupported(M context) {
+		return true;
+	}
+
+	default W apply(V parent, M context) {
+		if (!isViewSupported(parent))
+			throw new IllegalArgumentException("Parent view " + parent + "is not supported.");
+		if (!isModelSupported(context))
+			throw new IllegalArgumentException("Model context " + context + "is not supported.");
+		return createUiPart(parent, context);
+	}
+
+	default W createUiPart(V parent) {
+		return createUiPart(parent, null);
+	}
+}