{"action":"created","comment":{"url":"https://api.github.com/repos/caskdata/cdap/pulls/comments/41688308","id":41688308,"diff_hunk":"@@ -0,0 +1,104 @@\n+/*\n+ * Copyright © 2015 Cask Data, Inc.\n+ *\n+ * Licensed under the Apache License, Version 2.0 (the \"License\"); you may not\n+ * use this file except in compliance with the License. You may obtain a copy of\n+ * the License at\n+ *\n+ * http://www.apache.org/licenses/LICENSE-2.0\n+ *\n+ * Unless required by applicable law or agreed to in writing, software\n+ * distributed under the License is distributed on an \"AS IS\" BASIS, WITHOUT\n+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the\n+ * License for the specific language governing permissions and limitations under\n+ * the License.\n+ */\n+package co.cask.cdap.proto.id;\n+\n+import co.cask.cdap.proto.Id;\n+import co.cask.cdap.proto.element.ElementType;\n+import com.google.common.base.Preconditions;\n+import com.google.common.base.Splitter;\n+\n+import java.util.Iterator;\n+import java.util.Objects;\n+\n+/**\n+ * Uniquely identifies a particular instance of an element.","path":"cdap-proto/src/main/java/co/cask/cdap/proto/id/ElementId.java","position":27,"original_position":27,"commit_id":"7576ef9a927067ec20ab4bc7b4b4a3d96492025a","original_commit_id":"7576ef9a927067ec20ab4bc7b4b4a3d96492025a","user":{"login":"anew","id":483004,"avatar_url":"https://avatars.githubusercontent.com/u/483004?v=3","gravatar_id":"","url":"https://api.github.com/users/anew","html_url":"https://github.com/anew","followers_url":"https://api.github.com/users/anew/followers","following_url":"https://api.github.com/users/anew/following{/other_user}","gists_url":"https://api.github.com/users/anew/gists{/gist_id}","starred_url":"https://api.github.com/users/anew/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/anew/subscriptions","organizations_url":"https://api.github.com/users/anew/orgs","repos_url":"https://api.github.com/users/anew/repos","events_url":"https://api.github.com/users/anew/events{/privacy}","received_events_url":"https://api.github.com/users/anew/received_events","type":"User","site_admin":false},"body":"Can you add some instructions on how to add a new element type? (it requires that ElementType enum is updated).","created_at":"2015-10-09T23:46:13Z","updated_at":"2015-10-09T23:46:13Z","html_url":"https://github.com/caskdata/cdap/pull/4262#discussion_r41688308","pull_request_url":"https://api.github.com/repos/caskdata/cdap/pulls/4262","_links":{"self":{"href":"https://api.github.com/repos/caskdata/cdap/pulls/comments/41688308"},"html":{"href":"https://github.com/caskdata/cdap/pull/4262#discussion_r41688308"},"pull_request":{"href":"https://api.github.com/repos/caskdata/cdap/pulls/4262"}}},"pull_request":{"url":"https://api.github.com/repos/caskdata/cdap/pulls/4262","id":47122203,"html_url":"https://github.com/caskdata/cdap/pull/4262","diff_url":"https://github.com/caskdata/cdap/pull/4262.diff","patch_url":"https://github.com/caskdata/cdap/pull/4262.patch","issue_url":"https://api.github.com/repos/caskdata/cdap/issues/4262","number":4262,"state":"open","locked":false,"title":"CDAP-3657: Improve Id serialization","user":{"login":"jwang47","id":1084704,"avatar_url":"https://avatars.githubusercontent.com/u/1084704?v=3","gravatar_id":"","url":"https://api.github.com/users/jwang47","html_url":"https://github.com/jwang47","followers_url":"https://api.github.com/users/jwang47/followers","following_url":"https://api.github.com/users/jwang47/following{/other_user}","gists_url":"https://api.github.com/users/jwang47/gists{/gist_id}","starred_url":"https://api.github.com/users/jwang47/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jwang47/subscriptions","organizations_url":"https://api.github.com/users/jwang47/orgs","repos_url":"https://api.github.com/users/jwang47/repos","events_url":"https://api.github.com/users/jwang47/events{/privacy}","received_events_url":"https://api.github.com/users/jwang47/received_events","type":"User","site_admin":false},"body":"- Create new set of id classes (ElementId) with flat representation\r\n- Use ElementId for 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