bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/variable/VariableWrite.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.variable;
  13
  14 import org.simantics.databoard.Bindings;
  15 import org.simantics.databoard.binding.Binding;
  16 import org.simantics.databoard.binding.BooleanBinding;
  17 import org.simantics.databoard.binding.NumberBinding;
  18 import org.simantics.databoard.binding.StringBinding;
  19 import org.simantics.databoard.binding.error.BindingException;
  20 import org.simantics.databoard.binding.mutable.MutableStringBinding;
  21 import org.simantics.databoard.parser.repository.DataTypeSyntaxError;
  22 import org.simantics.databoard.parser.repository.DataValueRepository;
  23 import org.simantics.databoard.primitives.MutableString;
  24 import org.simantics.databoard.type.Datatype;
  25 import org.simantics.databoard.type.DoubleType;
  26 import org.simantics.databoard.type.FloatType;
  27 import org.simantics.databoard.type.IntegerType;
  28 import org.simantics.databoard.type.NumberType;
  29 import org.simantics.databoard.units.IUnitConverter;
  30 import org.simantics.databoard.units.internal.UnitParseException;
  31 import org.simantics.databoard.util.ObjectUtils;
  32 import org.simantics.db.VirtualGraph;
  33 import org.simantics.db.WriteGraph;
  34 import org.simantics.db.common.request.WriteRequest;
  35 import org.simantics.db.exception.DatabaseException;
  36 import org.simantics.db.layer0.util.Layer0Utils;
  37 import org.simantics.db.layer0.util.PrimitiveValueParser;
  38
  39 public class VariableWrite extends WriteRequest {
  40
  41     final private Variable variable;
  42     final private String label;
  43     final private String targetUnit;
  44
  45     public VariableWrite(Variable variable, String label) {
  46         this(variable, label, null, null);
  47     }
  48
  49     public VariableWrite(Variable variable, String label, VirtualGraph provider, String targetUnit) {
  50         super(provider);
  51         this.variable = variable;
  52         this.label = label;
  53         this.targetUnit = targetUnit;
  54     }
  55
  56     public static IUnitConverter converter(final String unit, final String targetUnit) {
  57
  58         return new IUnitConverter() {
  59
  60             @Override
  61             public double convert(double value) {
  62
  63                 if(targetUnit == null) return value;
  64
  65                 if("K".equals(unit)) {
  66                     if("C".equals(targetUnit)) value = value - 273.15;
  67                     else if("F".equals(targetUnit)) value = (value - 273.15) * 9.0/5.0 + 32.0;
  68                 } else if ("C".equals(unit)) {
  69                     if("K".equals(targetUnit)) value = value + 273.15;
  70                 } else if ("F".equals(unit)) {
  71                     if("K".equals(targetUnit)) value = (value - 32.0) * 5.0/9.0 + 273.15;
  72                 } else {
  73                     try {
  74                         value = org.simantics.databoard.Units.convert(value, unit, targetUnit);
  75                     } catch (UnitParseException e) {
  76                         e.printStackTrace();
  77                     }
  78                 }
  79
  80                 return value;
  81
  82             }
  83
  84         };
  85
  86
  87     }
  88
  89     @Override
  90     public void perform(WriteGraph graph) throws DatabaseException {
  91         graph.markUndoPoint();
  92         try {
  93             //System.err.println("VariableWrite " + variable.getURI(graph) + " => " + label);
  94             Datatype type = variable.getPossibleDatatype(graph);
  95             if (type == null) {
  96                 String uri = null;
  97                 try {
  98                     uri = variable.getURI(graph);
  99                 } catch (DatabaseException e) {
 100                 }
 101                 throw new org.simantics.db.exception.BindingException("no datatype for variable " + variable + " (URI=" + uri + ")", null);
 102             }
 103
 104             Binding binding = Bindings.getBinding(type);
 105
 106             String parsedLabel = label;
 107             Object value = null;
 108
 109             if (binding instanceof StringBinding) {
 110                 if (binding instanceof MutableStringBinding)
 111                     value = new MutableString(label);
 112                 else
 113                     value = label;
 114             } else if (binding instanceof BooleanBinding) {
 115                 // This parses a bit more than just "true"/"false".
 116                 try {
 117                     value = PrimitiveValueParser.parseBoolean(label);
 118                 } catch (IllegalArgumentException e) {
 119                     throw new DatabaseException(e);
 120                 }
 121             } else {
 122                 if (binding instanceof NumberBinding) {
 123                     parsedLabel = label.replace(",", ".");
 124                 }
 125
 126                 value = binding.parseValue(parsedLabel, new DataValueRepository());
 127
 128                 // FIXME: this is Balas-specific
 129                 if (targetUnit != null) {
 130                     if (type instanceof NumberType) {
 131                         String unit = Variables.getPossibleUnit(graph, variable);
 132                         if (unit != null) {
 133                             IUnitConverter converter = converter(targetUnit, unit);
 134                             if(type instanceof FloatType) {
 135                                 float converted = (float)converter.convert(((Number)value).floatValue());
 136                                 value = binding.parseValue(Float.toString(converted), new DataValueRepository());
 137                             } else if(type instanceof DoubleType) {
 138                                 double converted = converter.convert(((Number)value).doubleValue());
 139                                 value = binding.parseValue(Double.toString(converted), new DataValueRepository());
 140                             } else if(type instanceof IntegerType) {
 141                                 value = binding.parseValue(Integer.toString(((Number)value).intValue()), new DataValueRepository());
 142                             }
 143                         }
 144                     }
 145                 }
 146             }
 147             variable.setValue(graph, value, binding);
 148
 149             String[] varParts = variable.getParent(graph).getURI(graph).split("/");
 150             String varName = varParts[varParts.length - 1];
 151
 152             // Add a comment to metadata.
 153             Layer0Utils.addCommentMetadata(graph, "Modified variable " + varName + " to " + ObjectUtils.toString(value));
 154
 155         } catch (DataTypeSyntaxError e) {
 156             throw new DatabaseException(e);
 157         } catch (BindingException e) {
 158             throw new DatabaseException(e);
 159         }
 160
 161     }
 162
 163 }