X-Git-Url: http://git.argeo.org/?a=blobdiff_plain;f=org.argeo.cms.ui%2Fsrc%2Forg%2Fargeo%2Fcms%2Fui%2FMvcProvider.java;fp=org.argeo.cms.ui%2Fsrc%2Forg%2Fargeo%2Fcms%2Fui%2FMvcProvider.java;h=5d48873ab89e04bf6feb970919a6cf75ed6dc377;hb=b2c3ef991bc34596830e31e58a2b74147010374f;hp=0000000000000000000000000000000000000000;hpb=ed889869ecd572e9699260306c346b64f4439e3b;p=lgpl%2Fargeo-commons.git

diff --git a/org.argeo.cms.ui/src/org/argeo/cms/ui/MvcProvider.java b/org.argeo.cms.ui/src/org/argeo/cms/ui/MvcProvider.java
new file mode 100644
index 000000000..5d48873ab
--- /dev/null
+++ b/org.argeo.cms.ui/src/org/argeo/cms/ui/MvcProvider.java
@@ -0,0 +1,44 @@
+package org.argeo.api;
+
+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);
+	}
+}