1 files changed, 94 insertions, 0 deletions
diff --git a/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/NamingContext.java b/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/NamingContext.java
new file mode 100644
index 000000000..96d908e1b
--- /dev/null
+++ b/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/NamingContext.java
@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 2016 Cisco 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.honeycomb.v3po.translate.v3po.util;
+
+import static com.google.common.base.Preconditions.checkArgument;
+
+import com.google.common.collect.BiMap;
+import com.google.common.collect.HashBiMap;
+import javax.annotation.Nonnull;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Naming context keeping a mapping between int index and string name.
+ * Provides artificial names to unknown indices.
+ */
+public final class NamingContext implements AutoCloseable {
+
+    private static final Logger LOG = LoggerFactory.getLogger(NamingContext.class);
+
+    private final BiMap<String, Integer> nameMapping = HashBiMap.create();
+    private final String artificialNamePrefix;
+
+    public NamingContext(final String artificialNamePrefix) {
+        this.artificialNamePrefix = artificialNamePrefix;
+    }
+
+    @Nonnull
+    public synchronized String getName(final int index) {
+        if(!nameMapping.inverse().containsKey(index)) {
+            final String artificialName = getArtificialName(index);
+            LOG.info("Assigning artificial name: {} for index: {}", artificialName, index);
+            addName(index, artificialName);
+        }
+        return nameMapping.inverse().get(index);
+    }
+
+    @Nonnull
+    public synchronized boolean containsName(final int index) {
+        return nameMapping.inverse().containsKey(index);
+    }
+
+    @Nonnull
+    public synchronized void addName(final int index, final String name) {
+        nameMapping.put(name, index);
+    }
+
+    @Nonnull
+    public synchronized int removeName(final String name) {
+        return nameMapping.remove(name);
+    }
+
+    /**
+     * Returns index value associated with the given name.
+     *
+     * @param name the name whose associated index value is to be returned
+     * @return integer index value matching supplied name
+     * @throws IllegalArgumentException if name was not found
+     */
+    @Nonnull
+    public synchronized int getIndex(String name) {
+        checkArgument(nameMapping.containsKey(name), "Name %s not found. Known names: %s",
+                name, nameMapping);
+        return nameMapping.get(name);
+    }
+
+    @Nonnull
+    public synchronized boolean containsIndex(String interfaceName) {
+        return nameMapping.containsKey(interfaceName);
+    }
+
+    public String getArtificialName(final int index) {
+        return artificialNamePrefix + index;
+    }
+
+    @Override
+    public void close() throws Exception {
+        nameMapping.clear();
+    }
+}