opendaylight/md-sal/messagebus-util/src/main/java/org/opendaylight/controller/messagebus/app/util/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.util;
  10
  11 import java.util.ArrayList;
  12 import java.util.List;
  13 import java.util.concurrent.Future;
  14 import java.util.regex.Pattern;
  15
  16 import org.opendaylight.yangtools.yang.common.RpcResult;
  17 import org.opendaylight.yangtools.yang.common.RpcResultBuilder;
  18 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
  19
  20 import com.google.common.util.concurrent.Futures;
  21
  22
  23 public final class Util {
  24
  25     public static <T> Future<RpcResult<T>> resultRpcSuccessFor(final T output) {
  26         final RpcResult<T> result = RpcResultBuilder.success(output).build();
  27         return Futures.immediateFuture(result);
  28     }
  29
  30     /**
  31      * Method filters qnames based on wildcard strings
  32      *
  33      * @param list
  34      * @param pattern matching pattern
  35      * @return list of filtered qnames
  36      */
  37     public static List<SchemaPath> expandQname(final List<SchemaPath> list, final Pattern pattern) {
  38         final List<SchemaPath> matchingQnames = new ArrayList<>();
  39
  40         for (final SchemaPath notification : list) {
  41             final String namespace = notification.getLastComponent().getNamespace().toString();
  42             if (pattern.matcher(namespace).matches()) {
  43                 matchingQnames.add(notification);
  44             }
  45         }
  46         return matchingQnames;
  47     }
  48
  49     /**
  50      * CREDIT to http://www.rgagnon.com/javadetails/java-0515.html
  51      * @param wildcard
  52      * @return
  53      */
  54     public static String wildcardToRegex(final String wildcard){
  55         final StringBuilder s = new StringBuilder(wildcard.length());
  56         s.append('^');
  57         for (final char c : wildcard.toCharArray()) {
  58             switch(c) {
  59                 case '*':
  60                     s.append(".*");
  61                     break;
  62                 case '?':
  63                     s.append('.');
  64                     break;
  65                 // escape special regexp-characters
  66                 case '(':
  67                 case ')':
  68                 case '[':
  69                 case ']':
  70                 case '$':
  71                 case '^':
  72                 case '.':
  73                 case '{':
  74                 case '}':
  75                 case '|':
  76                 case '\\':
  77                     s.append("\\");
  78                     s.append(c);
  79                     break;
  80                 default:
  81                     s.append(c);
  82                     break;
  83             }
  84         }
  85         s.append('$');
  86         return s.toString();
  87     }
  88 }