Github user geomacy commented on a diff in the pull request:
https://github.com/apache/brooklyn-server/pull/737#discussion_r124014747
--- Diff:
core/src/main/java/org/apache/brooklyn/core/typereg/RegisteredTypeNaming.java
---
@@ -0,0 +1,111 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you 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 org.apache.brooklyn.core.typereg;
+
+/**
+ * Methods for testing validity of names and decomposing them.
+ * Mostly based on OSGi, specifically sections 1.3.2 and 3.2.5 of
+ * osgi.core-4.3.0 spec
(https://www.osgi.org/release-4-version-4-3-download/). */
+public class RegisteredTypeNaming {
+
+ private static final String USABLE_REGEX = "[^:\\s/\\\\]+";
+
+ private final static String DOT = "\\.";
+
+ public final static String OSGI_TOKEN_CHARS = "A-Za-z0-9_-";
+ public final static String OSGI_TOKEN_REGEX = "[" + OSGI_TOKEN_CHARS +
"]+";
+ public final static String OSGI_SYMBOLIC_NAME_REGEX = OSGI_TOKEN_REGEX
+ "(" + DOT + OSGI_TOKEN_REGEX + ")*";
+ public final static String NUMBER = "[0-9]+";
+ public final static String QUALIFIER = OSGI_TOKEN_REGEX;
+ public final static String VERSION_REGEX =
+ NUMBER +
+ "(" + "\\." + NUMBER +
--- End diff --
You've already defined `DOT`, might as well use it here.
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