bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/genericrelation/UnsupportedRelation.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.db.layer0.genericrelation;
  13
  14 import java.util.List;
  15
  16 import org.simantics.db.ReadGraph;
  17 import org.simantics.db.exception.DatabaseException;
  18 import org.simantics.db.layer0.adapter.GenericRelation;
  19 import org.simantics.utils.datastructures.Pair;
  20
  21 /**
  22  * Default implementation for some methods of IRelation interface.
  23  */
  24 public class UnsupportedRelation implements GenericRelation {
  25
  26         @Override
  27         public boolean contains(ReadGraph graph, Object[] tuple) throws DatabaseException {
  28                 throw new UnsupportedOperationException();
  29         }
  30
  31         @Override
  32         public boolean isRealizable() {
  33                 throw new UnsupportedOperationException();
  34         }
  35
  36         @Override
  37         public List<Object[]> realize(ReadGraph graph) throws DatabaseException {
  38                 throw new UnsupportedOperationException();
  39         }
  40
  41         @Override
  42         public GenericRelation select(String bindingPattern, Object[] constants) {
  43                 throw new UnsupportedOperationException();
  44         }
  45
  46         @Override
  47         public GenericRelation selectByRelation(String bindingPattern,
  48                         GenericRelation constraint) {
  49                 throw new UnsupportedOperationException();
  50         }
  51
  52         @Override
  53         public Pair<String, String>[] getFields() {
  54                 throw new UnsupportedOperationException();
  55         }
  56
  57         private Class<?> getClass(String clazz) {
  58                 if("Long".equals(clazz)) return Long.class;
  59                 else return String.class;
  60         }
  61
  62         protected void checkSelectionArguments(String bindingPattern, Object[] constants, String[] allowedPatterns) {
  63
  64         boolean allowed = false;
  65         for(String allow : allowedPatterns) {
  66                 if(allow.equals(bindingPattern)) {
  67                 allowed = true;
  68                 break;
  69             }
  70         }
  71
  72         if(!allowed) throw new IllegalArgumentException("Select does not support binding pattern '" + bindingPattern + "'");
  73
  74                 Pair<String, String>[] fields = getFields();
  75
  76                 assert(bindingPattern.length() == fields.length);
  77                 int constantIndex = 0;
  78                 for(int i=0;i<bindingPattern.length();++i) {
  79                         Class<?> clazz = getClass(fields[i].second);
  80                         switch(bindingPattern.charAt(i)) {
  81                         case 'b':
  82                                 if(!clazz.isInstance(constants[constantIndex++])) throw new IllegalArgumentException("Invalid constant.");
  83                                 break;
  84                         case 'f':
  85                                 break;
  86                         default:
  87                                 throw new IllegalArgumentException("Invalid binding character '" + bindingPattern.charAt(i) + "'");
  88                         }
  89                 }
  90
  91         }
  92
  93 }