opendaylight/md-sal/messagebus-impl/src/main/java/org/opendaylight/controller/messagebus/app/impl/Util.java

   1 /*
   2  * Copyright (c) 2015 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8
   9 package org.opendaylight.controller.messagebus.app.impl;
  10
  11 import java.util.ArrayList;
  12 import java.util.List;
  13 import java.util.UUID;
  14 import java.util.concurrent.Future;
  15 import java.util.regex.Pattern;
  16
  17 import org.opendaylight.yangtools.yang.common.RpcResult;
  18 import org.opendaylight.yangtools.yang.common.RpcResultBuilder;
  19 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
  20
  21 import com.google.common.util.concurrent.Futures;
  22
  23
  24 public final class Util {
  25
  26     public static String getUUIDIdent(){
  27         UUID uuid = UUID.randomUUID();
  28         return uuid.toString();
  29     }
  30
  31     public static <T> Future<RpcResult<T>> resultRpcSuccessFor(final T output) {
  32         final RpcResult<T> result = RpcResultBuilder.success(output).build();
  33         return Futures.immediateFuture(result);
  34     }
  35
  36     /**
  37      * Method filters qnames based on wildcard strings
  38      *
  39      * @param list
  40      * @param patterh matching pattern
  41      * @return list of filtered qnames
  42      */
  43     public static List<SchemaPath> expandQname(final List<SchemaPath> list, final Pattern pattern) {
  44         final List<SchemaPath> matchingQnames = new ArrayList<>();
  45
  46         for (final SchemaPath notification : list) {
  47             final String namespace = notification.getLastComponent().getNamespace().toString();
  48             if (pattern.matcher(namespace).matches()) {
  49                 matchingQnames.add(notification);
  50             }
  51         }
  52         return matchingQnames;
  53     }
  54
  55     /**
  56      * CREDIT to http://www.rgagnon.com/javadetails/java-0515.html
  57      * @param wildcard
  58      * @return
  59      */
  60     public static String wildcardToRegex(final String wildcard){
  61         final StringBuffer s = new StringBuffer(wildcard.length());
  62         s.append('^');
  63         for (final char c : wildcard.toCharArray()) {
  64             switch(c) {
  65                 case '*':
  66                     s.append(".*");
  67                     break;
  68                 case '?':
  69                     s.append('.');
  70                     break;
  71                 // escape special regexp-characters
  72                 case '(':
  73                 case ')':
  74                 case '[':
  75                 case ']':
  76                 case '$':
  77                 case '^':
  78                 case '.':
  79                 case '{':
  80                 case '}':
  81                 case '|':
  82                 case '\\':
  83                     s.append("\\");
  84                     s.append(c);
  85                     break;
  86                 default:
  87                     s.append(c);
  88                     break;
  89             }
  90         }
  91         s.append('$');
  92         return s.toString();
  93     }
  94 }