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

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