Add EditorComponentGenerator interface (#7990)

* Add EditorComponentGenerator interface

Closes vaadin/framework8-issues#565

* Add missing @FunctionalInterface

* Rebase onto current master

* Fix imports

* Restore old import order

1 files changed, 45 insertions, 0 deletions

diff --git a/server/src/main/java/com/vaadin/ui/components/grid/EditorComponentGenerator.java b/server/src/main/java/com/vaadin/ui/components/grid/EditorComponentGenerator.java
new file mode 100644
index 0000000000..c21142ffee
--- /dev/null
+++ b/server/src/main/java/com/vaadin/ui/components/grid/EditorComponentGenerator.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2000-2016 Vaadin Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package com.vaadin.ui.components.grid;
+
+import com.vaadin.server.SerializableFunction;
+import com.vaadin.ui.Component;
+
+/**
+ * A callback interface for generating an editor component corresponding to an
+ * editable column of a grid. The generated component will be used in the grid
+ * editor to edit the value of the column for the selected grid row.
+ * 
+ * @author Vaadin Ltd.
+ * @since 8.0
+ *
+ * @param <BEAN>
+ *            the bean type this generator is compatible with
+ */
+@FunctionalInterface
+public interface EditorComponentGenerator<BEAN>
+        extends SerializableFunction<BEAN, Component> {
+
+    /**
+     * Gets a component for a given {@code bean}.
+     * 
+     * @param bean
+     *            the bean this component will be used to edit
+     * @return the generated component
+     */
+    @Override
+    public Component apply(BEAN bean);
+}