Expose minimum YANG version for YangFunction

Not all YangFunctions are available when we are operating in RFC6020
mode. This patch exposes the minimum YANG version from YangFunction,
so it can be checked at runtime.

JIRA: YANGTOOLS-1036
Change-Id: Ieedd58202dd14be9da7cd079c5180e92450c9e5b
Signed-off-by: Robert Varga <robert.varga@pantheon.tech>
(cherry picked from commit d360dda9dc1fd55ecb6bf02be98e385948270068)

diff --git a/yang/yang-xpath-api/src/main/java/org/opendaylight/yangtools/yang/xpath/api/YangFunction.java b/yang/yang-xpath-api/src/main/java/org/opendaylight/yangtools/yang/xpath/api/YangFunction.java
index 7e893eb146986c466a9b817e6cd9af8afddaf6b8..4e82369296028c433d1668699947553fdc5ee783 100644 (file)
--- a/yang/yang-xpath-api/src/main/java/org/opendaylight/yangtools/yang/xpath/api/YangFunction.java
+++ b/yang/yang-xpath-api/src/main/java/org/opendaylight/yangtools/yang/xpath/api/YangFunction.java
@@ -7,10 +7,13 @@
  */
 package org.opendaylight.yangtools.yang.xpath.api;
 
+import static java.util.Objects.requireNonNull;
+
 import com.google.common.annotations.Beta;
 import org.opendaylight.yangtools.concepts.Identifiable;
 import org.opendaylight.yangtools.yang.common.QName;
 import org.opendaylight.yangtools.yang.common.YangConstants;
+import org.opendaylight.yangtools.yang.common.YangVersion;
 
 /**
  * Functions known to a YANG XPath.
@@ -48,23 +51,40 @@ public enum YangFunction implements Identifiable<QName> {
     TRANSLATE("translate"),
     TRUE("true"),
 
-    // RFC7950 functions
-    BIT_IS_SET("bit-is-set"),
+    // RFC6020 functions
     CURRENT("current"),
-    DEREF("deref"),
-    DERIVED_FROM("derived-from"),
-    DERIVED_FROM_OR_SELF("derived-from-or-self"),
-    ENUM_VALUE("enum-value"),
-    RE_MATCH("re-match");
+
+    // RFC7950 functions
+    BIT_IS_SET("bit-is-set", YangVersion.VERSION_1_1),
+    DEREF("deref", YangVersion.VERSION_1_1),
+    DERIVED_FROM("derived-from", YangVersion.VERSION_1_1),
+    DERIVED_FROM_OR_SELF("derived-from-or-self", YangVersion.VERSION_1_1),
+    ENUM_VALUE("enum-value", YangVersion.VERSION_1_1),
+    RE_MATCH("re-match", YangVersion.VERSION_1_1);
 
     private final QName identifier;
+    private final YangVersion yangVersion;
 
-    YangFunction(final String localName) {
+    YangFunction(final String localName, final YangVersion yangVersion) {
         identifier = QName.create(YangConstants.RFC6020_YIN_MODULE, localName).intern();
+        this.yangVersion = requireNonNull(yangVersion);
+    }
+
+    YangFunction(final String localName) {
+        this(localName, YangVersion.VERSION_1);
     }
 
     @Override
     public QName getIdentifier() {
         return identifier;
     }
+
+    /**
+     * Return the minimum YANG version where this function is supported.
+     *
+     * @return First YANG version where this function appeared.
+     */
+    public YangVersion getYangVersion() {
+        return yangVersion;
+    }
 }