bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/genericrelation/UnsupportedRelation.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.layer0.genericrelation;\r
  13 \r
  14 import java.util.List;\r
  15 \r
  16 import org.simantics.db.ReadGraph;\r
  17 import org.simantics.db.exception.DatabaseException;\r
  18 import org.simantics.db.layer0.adapter.GenericRelation;\r
  19 import org.simantics.utils.datastructures.Pair;\r
  20 \r
  21 /**\r
  22  * Default implementation for some methods of IRelation interface.\r
  23  */\r
  24 public class UnsupportedRelation implements GenericRelation {\r
  25 \r
  26         @Override\r
  27         public boolean contains(ReadGraph graph, Object[] tuple) throws DatabaseException {\r
  28                 throw new UnsupportedOperationException();\r
  29         }\r
  30 \r
  31         @Override\r
  32         public boolean isRealizable() {\r
  33                 throw new UnsupportedOperationException();\r
  34         }\r
  35 \r
  36         @Override\r
  37         public List<Object[]> realize(ReadGraph graph) throws DatabaseException {\r
  38                 throw new UnsupportedOperationException();\r
  39         }\r
  40 \r
  41         @Override\r
  42         public GenericRelation select(String bindingPattern, Object[] constants) {\r
  43                 throw new UnsupportedOperationException();\r
  44         }\r
  45 \r
  46         @Override\r
  47         public GenericRelation selectByRelation(String bindingPattern,\r
  48                         GenericRelation constraint) {\r
  49                 throw new UnsupportedOperationException();\r
  50         }\r
  51 \r
  52         @Override\r
  53         public Pair<String, String>[] getFields() {\r
  54                 throw new UnsupportedOperationException();\r
  55         }\r
  56 \r
  57         private Class<?> getClass(String clazz) {\r
  58                 if("Long".equals(clazz)) return Long.class;\r
  59                 else return String.class;\r
  60         }\r
  61         \r
  62         protected void checkSelectionArguments(String bindingPattern, Object[] constants, String[] allowedPatterns) {\r
  63 \r
  64         boolean allowed = false;\r
  65         for(String allow : allowedPatterns) {\r
  66                 if(allow.equals(bindingPattern)) {\r
  67                 allowed = true;\r
  68                 break;\r
  69             }\r
  70         }\r
  71         \r
  72         if(!allowed) throw new IllegalArgumentException("Select does not support binding pattern '" + bindingPattern + "'");\r
  73 \r
  74                 Pair<String, String>[] fields = getFields();\r
  75 \r
  76                 assert(bindingPattern.length() == fields.length);\r
  77                 int constantIndex = 0;\r
  78                 for(int i=0;i<bindingPattern.length();++i) {\r
  79                         Class<?> clazz = getClass(fields[i].second);\r
  80                         switch(bindingPattern.charAt(i)) {\r
  81                         case 'b':\r
  82                                 if(!clazz.isInstance(constants[constantIndex++])) throw new IllegalArgumentException("Invalid constant.");\r
  83                                 break;\r
  84                         case 'f':\r
  85                                 break;\r
  86                         default:\r
  87                                 throw new IllegalArgumentException("Invalid binding character '" + bindingPattern.charAt(i) + "'");\r
  88                         }\r
  89                 }\r
  90 \r
  91         }\r
  92 \r
  93 }\r