bundles/org.simantics.db.common/src/org/simantics/db/common/uri/URIToResource.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
   3  * in Industry THTH ry.\r
   4  * All rights reserved. This program and the accompanying materials\r
   5  * are made available under the terms of the Eclipse Public License v1.0\r
   6  * which accompanies this distribution, and is available at\r
   7  * http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  * Contributors:\r
  10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.db.common.uri;\r
  13 \r
  14 import java.util.Arrays;\r
  15 import java.util.Map;\r
  16 \r
  17 import org.simantics.db.AsyncReadGraph;\r
  18 import org.simantics.db.Resource;\r
  19 import org.simantics.db.common.request.Queries;\r
  20 import org.simantics.db.exception.ResourceNotFoundException;\r
  21 import org.simantics.db.procedure.AsyncProcedure;\r
  22 import org.simantics.db.request.AsyncRead;\r
  23 \r
  24 /**\r
  25  * TODO: should this be considered deprecated and favor {@link Queries#resource(String)} ?\r
  26  */\r
  27 public class URIToResource implements AsyncRead<Resource> {\r
  28         String[] nameSequence;\r
  29         \r
  30         public URIToResource(String[] nameSequence) {\r
  31                 this.nameSequence = nameSequence;\r
  32         }\r
  33         \r
  34         public URIToResource(String uri) {\r
  35                 this.nameSequence = URIEscape.splitURI(uri);\r
  36         }\r
  37 \r
  38         @Override\r
  39         public void perform(AsyncReadGraph g, final AsyncProcedure<Resource> procedure) {\r
  40                 if(nameSequence.length == 0)\r
  41                         procedure.execute(g, g.getRootLibrary());\r
  42                 else\r
  43                         g.asyncRequest(new URIToResource(Arrays.copyOf(nameSequence, nameSequence.length-1)),\r
  44                                 new AsyncProcedure<Resource>() {\r
  45 \r
  46                                         @Override\r
  47                                         public void execute(AsyncReadGraph g, Resource result) {\r
  48                                                 g.asyncRequest(new EscapedChildMapOfResource(result),\r
  49                                                         new AsyncProcedure<Map<String, Resource>>() {\r
  50 \r
  51                                                                 @Override\r
  52                                                                 public void execute(AsyncReadGraph g, Map<String, Resource> map) {\r
  53                                                                         Resource r = map.get(nameSequence[nameSequence.length-1]);\r
  54                                                                         if(r != null)\r
  55                                                                                 procedure.execute(g, r);\r
  56                                                                         else\r
  57                                                                                 procedure.exception(g, new ResourceNotFoundException(\r
  58                                                                                                 URIEscape.joinURI(nameSequence)));\r
  59                                                                 }\r
  60                                                         \r
  61                                                                 @Override\r
  62                                                                 public void exception(AsyncReadGraph g, Throwable t) {\r
  63                                                                         procedure.exception(g, t);                                                                                                                      \r
  64                                                                 }\r
  65                                                         \r
  66                                                         }\r
  67                                                 );\r
  68                                         }\r
  69                                 \r
  70                                         @Override\r
  71                                         public void exception(AsyncReadGraph g, Throwable t) {\r
  72                                                 procedure.exception(g, t);                                              \r
  73                                         }\r
  74                                 \r
  75                                 }\r
  76                         );\r
  77                 \r
  78         }\r
  79         \r
  80         @Override\r
  81         public int hashCode() {\r
  82                 return Arrays.hashCode(nameSequence);\r
  83         }\r
  84 \r
  85     @Override\r
  86     public int threadHash() {\r
  87         return hashCode();\r
  88     }\r
  89 \r
  90         @Override\r
  91         public boolean equals(Object obj) {\r
  92                 if(this == obj)\r
  93                         return true;\r
  94                 if(!(obj instanceof URIToResource))\r
  95                         return false;\r
  96                 return Arrays.equals(nameSequence, ((URIToResource)obj).nameSequence);\r
  97         }\r
  98     \r
  99     @Override\r
 100     public int getFlags() {\r
 101         return 0;\r
 102     }\r
 103 \r
 104 }\r