1 files changed, 82 insertions, 0 deletions
diff --git a/srv6/srv6-impl/src/main/java/io/fd/hc2vpp/srv6/util/LocatorContextManager.java b/srv6/srv6-impl/src/main/java/io/fd/hc2vpp/srv6/util/LocatorContextManager.java
new file mode 100644
index 000000000..6241ae8e3
--- /dev/null
+++ b/srv6/srv6-impl/src/main/java/io/fd/hc2vpp/srv6/util/LocatorContextManager.java
@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2018 Bell Canada, Pantheon Technologies and/or its affiliates.
+ *
+ * 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 io.fd.hc2vpp.srv6.util;
+
+import static com.google.common.base.Preconditions.checkArgument;
+
+import io.fd.honeycomb.translate.MappingContext;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import javax.annotation.Nonnull;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv6Address;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv6Prefix;
+
+/**
+ * Manages metadata for SRv6 plugin
+ */
+public interface LocatorContextManager {
+    String GROUP_IP = "ip";
+    String GROUP_PREFIX = "prefix";
+    Pattern IP_PREFIX_PATTERN = Pattern.compile("(?<ip>\\S.*)/(?<prefix>\\d{1,3})");
+
+    /**
+     * Creates metadata for locator. Existing mapping is overwritten if exists.
+     *
+     * @param name       locator name
+     * @param ipv6Prefix locator with locator length in form of Ipv6Prefix
+     * @param ctx        mapping context providing context data for current transaction
+     */
+    void addLocator(@Nonnull final String name, @Nonnull Ipv6Prefix ipv6Prefix, @Nonnull final MappingContext ctx);
+
+    /**
+     * Check whether metadata for given locator is present.
+     *
+     * @param name locator name
+     * @param ctx  mapping context providing context data for current transaction
+     * @return true if present, false otherwise
+     */
+    boolean containsLocator(@Nonnull final String name, @Nonnull final MappingContext ctx);
+
+    /**
+     * Retrieves locator IPv6 prefix for given locator IPv6 address. If not present, artificial name will be generated.
+     *
+     * @param name locator name
+     * @param ctx  mapping context providing context data for current transaction
+     * @return Locator prefix matching supplied locator address
+     */
+    Ipv6Prefix getLocator(@Nonnull final String name, @Nonnull final MappingContext ctx);
+
+    /**
+     * Removes locator metadata from current context.
+     *
+     * @param name locator name
+     * @param ctx  mapping context providing context data for current transaction
+     */
+    void removeLocator(@Nonnull final String name, @Nonnull final MappingContext ctx);
+
+    static Integer parseLength(@Nonnull final Ipv6Prefix prefix) {
+        Matcher matcher = IP_PREFIX_PATTERN.matcher(prefix.getValue());
+        checkArgument(matcher.matches(), "Could`t parse Locator length: {}", prefix);
+        return Integer.parseInt(matcher.group(GROUP_PREFIX));
+    }
+
+    static Ipv6Address parseLocator(@Nonnull final Ipv6Prefix prefix) {
+        Matcher matcher = IP_PREFIX_PATTERN.matcher(prefix.getValue());
+        checkArgument(matcher.matches(), "Could`t parse Locator: {}", prefix);
+        return new Ipv6Address(matcher.group(GROUP_IP));
+    }
+}