bundles/org.simantics.debug.browser/src/org/simantics/debug/browser/utils/Values.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2016 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  *     THTH ry - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.debug.browser.utils;\r
  13 \r
  14 import java.io.IOException;\r
  15 import java.lang.reflect.Array;\r
  16 import java.util.Arrays;\r
  17 \r
  18 import org.simantics.databoard.Bindings;\r
  19 import org.simantics.databoard.Databoard;\r
  20 import org.simantics.databoard.binding.ArrayBinding;\r
  21 import org.simantics.databoard.binding.Binding;\r
  22 import org.simantics.databoard.binding.error.BindingException;\r
  23 import org.simantics.databoard.serialization.Serializer;\r
  24 import org.simantics.databoard.type.ArrayType;\r
  25 import org.simantics.databoard.type.Datatype;\r
  26 import org.simantics.databoard.util.ObjectUtils;\r
  27 import org.simantics.db.ReadGraph;\r
  28 import org.simantics.db.Resource;\r
  29 import org.simantics.db.common.utils.CommonDBUtils;\r
  30 import org.simantics.db.exception.DatabaseException;\r
  31 import org.simantics.db.layer0.variable.RVI;\r
  32 import org.simantics.db.layer0.variable.Variable;\r
  33 import org.simantics.db.layer0.variable.Variables;\r
  34 import org.simantics.layer0.Layer0;\r
  35 \r
  36 public class Values {\r
  37 \r
  38     private static int RESOURCE_NAME_MAX_LENGTH = 1000;\r
  39     private static int RESOURCE_VALUE_MAX_SIZE = 16384;\r
  40 \r
  41     public static ValueInfo getPossibleValueInfo(ReadGraph graph, Resource r) {\r
  42         try {\r
  43             if (!graph.hasValue(r))\r
  44                 return null;\r
  45 \r
  46             String value = null;\r
  47             String datatype = null;\r
  48 \r
  49             Layer0 L0 = Layer0.getInstance(graph);\r
  50             Datatype type = graph.getPossibleRelatedValue(r, L0.HasDataType, Bindings.getBindingUnchecked(Datatype.class));\r
  51             if (type != null) {\r
  52                 if (graph.isInstanceOf(r, L0.RVI)) {\r
  53                     try {\r
  54                         RVI rvi = graph.getPossibleValue(r, graph.getService(Databoard.class).getBindingUnchecked(RVI.class));\r
  55                         Resource owner = CommonDBUtils.getPossibleOwner(graph, r);\r
  56                         if (owner != null) {\r
  57                             Variable context  = Variables.getPossibleConfigurationContext(graph, owner);\r
  58                             if (context != null)  \r
  59                                 value = rvi.asPossibleString(graph, context);\r
  60                         }\r
  61                         if (value == null)\r
  62                             value = rvi.toString( graph );\r
  63                         if (value != null)\r
  64                             datatype = "Relative Variable Identifier (RVI)";\r
  65                     } catch (DatabaseException e) {\r
  66                         // Fall through to more generic mechanisms\r
  67                     }\r
  68                 }\r
  69 \r
  70                 // Generic datatype-based fallback method\r
  71                 if (value == null) {\r
  72                     Binding b = Bindings.getBinding(type);\r
  73                     Object v = graph.getPossibleValue(r, b);\r
  74                     Serializer s = Bindings.getSerializerUnchecked(b);\r
  75                     int size = s.getSize(v);\r
  76                     if (size > RESOURCE_VALUE_MAX_SIZE) {\r
  77                         value = "Approx. " + size + " byte literal";\r
  78                     } else {\r
  79                         if (b instanceof ArrayBinding) {\r
  80                             // Manipulate data type to contain actual array\r
  81                             // length for printing purposes.\r
  82                             int arraySize = ((ArrayBinding) b).size(v);\r
  83                             ArrayType atype = (ArrayType) type;\r
  84                             atype.setLength(Integer.toString(arraySize));\r
  85                         }\r
  86                         value = b.toString(v, false);\r
  87                     }\r
  88 //                    datatype = type.toSingleLineString();\r
  89 //                    datatype = type.toString();\r
  90 //                    datatype = DataTypePrinter2.print(type);\r
  91                     datatype = Bindings.getBindingUnchecked(Datatype.class).toString(type, false);\r
  92                 }\r
  93             }\r
  94 \r
  95             // Final fallback if there's no datatype specified\r
  96             ValueInfo info = null;\r
  97             if (value != null)\r
  98                 info = new ValueInfo(r, value, datatype);\r
  99             if (info == null)\r
 100                 info = toSimpleValueInfo(r, graph.getValue(r));\r
 101 \r
 102             return info;\r
 103         } catch (DatabaseException e) {\r
 104             return null;\r
 105         } catch (IOException e) {\r
 106             return null;\r
 107         } catch (BindingException e) {\r
 108             return null;\r
 109         }\r
 110     }\r
 111 \r
 112     private static ValueInfo toSimpleValueInfo(Resource r, Object value) {\r
 113         Class<?> clazz = value.getClass();\r
 114         if (clazz.isArray()) {\r
 115             int length = Array.getLength(value);\r
 116             if (length > RESOURCE_NAME_MAX_LENGTH) {\r
 117                 if (value instanceof byte[]) {\r
 118                     byte[] arr = (byte[]) value;\r
 119                     byte[] arr2 = Arrays.copyOf(arr, RESOURCE_NAME_MAX_LENGTH);\r
 120                     return truncated(r, "byte", Arrays.toString(arr2), arr.length);\r
 121                 } else if (value instanceof int[]) {\r
 122                     int[] arr = (int[]) value;\r
 123                     int[] arr2 = Arrays.copyOf(arr, RESOURCE_NAME_MAX_LENGTH);\r
 124                     return truncated(r, "int", Arrays.toString(arr2), arr.length);\r
 125                 } else if (value instanceof long[]) {\r
 126                     long[] arr = (long[]) value;\r
 127                     long[] arr2 = Arrays.copyOf(arr, RESOURCE_NAME_MAX_LENGTH);\r
 128                     return truncated(r, "long", Arrays.toString(arr2), arr.length);\r
 129                 } else if (value instanceof float[]) {\r
 130                     float[] arr = (float[]) value;\r
 131                     float[] arr2 = Arrays.copyOf(arr, RESOURCE_NAME_MAX_LENGTH);\r
 132                     return truncated(r, "float", Arrays.toString(arr2), arr.length);\r
 133                 } else if (value instanceof double[]) {\r
 134                     double[] arr = (double[]) value;\r
 135                     double[] arr2 = Arrays.copyOf(arr, RESOURCE_NAME_MAX_LENGTH);\r
 136                     return truncated(r, "double", Arrays.toString(arr2), arr.length);\r
 137                 } else if (value instanceof boolean[]) {\r
 138                     boolean[] arr = (boolean[]) value;\r
 139                     boolean[] arr2 = Arrays.copyOf(arr, RESOURCE_NAME_MAX_LENGTH);\r
 140                     return truncated(r, "boolean", Arrays.toString(arr2), arr.length);\r
 141                 } else if (value instanceof Object[]) {\r
 142                     Object[] arr = (Object[]) value;\r
 143                     Object[] arr2 = Arrays.copyOf(arr, RESOURCE_NAME_MAX_LENGTH);\r
 144                     return truncated(r, "Object", Arrays.toString(arr2), arr.length);\r
 145                 } else {\r
 146                     return new ValueInfo(r, "", "Unknown big array " + clazz.getCanonicalName());\r
 147                 }\r
 148             } else {\r
 149                 return new ValueInfo(r, ObjectUtils.toString(value), clazz.getComponentType() + "[" + length + "]");\r
 150             }\r
 151         }\r
 152         return new ValueInfo(r, ObjectUtils.toString(value), clazz.getCanonicalName());\r
 153     }\r
 154 \r
 155     private static ValueInfo truncated(Resource r, String type, String value, int originalLength) {\r
 156         return new ValueInfo(r, value, type + "[" + RESOURCE_NAME_MAX_LENGTH + "/" + originalLength + "]");\r
 157     }\r
 158 \r
 159 }\r