1 files changed, 42 insertions, 0 deletions
diff --git a/mojo/public/tools/bindings/generators/java_templates/enum_definition.tmpl b/mojo/public/tools/bindings/generators/java_templates/enum_definition.tmpl
new file mode 100644
index 0000000000..d37288ac5d
--- /dev/null
+++ b/mojo/public/tools/bindings/generators/java_templates/enum_definition.tmpl
@@ -0,0 +1,42 @@
+{%- macro enum_value(enum, field, index) -%}
+{%- if field.value -%}
+(int) ({{field.value|expression_to_text('i32')}})
+{%- elif index == 0 -%}
+0
+{%- else -%}
+{{enum.fields[index - 1]|name}} + 1
+{%- endif -%}
+{%- endmacro -%}
+
+{%- macro enum_def(enum, top_level) -%}
+public {{ 'static ' if not top_level }}final class {{enum|name}} {
+
+{% for field in enum.fields %}
+    public static final int {{field|name}} = {{enum_value(enum, field, loop.index0)}};
+{% endfor %}
+
+    private static final boolean IS_EXTENSIBLE = {% if enum.extensible %}true{% else %}false{% endif %};
+
+    public static boolean isKnownValue(int value) {
+{%- if enum.fields %}
+        switch (value) {
+{%-   for enum_field in enum.fields|groupby('numeric_value') %}
+            case {{enum_field[0]}}:
+{%-   endfor %}
+                return true;
+        }
+{%- endif %}
+        return false;
+    }
+
+    public static void validate(int value) {
+        if (IS_EXTENSIBLE || isKnownValue(value))
+            return;
+
+        throw new DeserializationException("Invalid enum value.");
+    }
+
+    private {{enum|name}}() {}
+
+}
+{%- endmacro -%}