bundles/org.simantics.databoard/examples/org/simantics/databoard/example/StringVariantBindingExample.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007 VTT Technical Research Centre of Finland and others.\r
   3  * All rights reserved. This program and the accompanying materials\r
   4  * are made available under the terms of the Eclipse Public License v1.0\r
   5  * which accompanies this distribution, and is available at\r
   6  * http://www.eclipse.org/legal/epl-v10.html\r
   7  *\r
   8  * Contributors:\r
   9  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  10  *******************************************************************************/\r
  11 package org.simantics.databoard.example;\r
  12 \r
  13 import java.awt.geom.Rectangle2D;\r
  14 import java.util.Arrays;\r
  15 \r
  16 import org.simantics.databoard.Bindings;\r
  17 import org.simantics.databoard.binding.Binding;\r
  18 import org.simantics.databoard.binding.mutable.MutableVariant;\r
  19 \r
  20 public class StringVariantBindingExample {\r
  21 \r
  22         public static void main(String[] args) throws Exception {\r
  23 \r
  24                 //\r
  25                 // You can escape any string to a string that is filename and URL compatible,\r
  26                 // using StringVariantBinding\r
  27                 //              \r
  28                 String str = "Hello World";\r
  29                 String escapedString = (String) Bindings.STR_VARIANT.create(Bindings.STRING, str);\r
  30                 String unescapedString = (String) Bindings.STR_VARIANT.getContent(escapedString, Bindings.STRING);\r
  31                 System.out.println("Unescaped String: "+unescapedString);\r
  32                 System.out.println("Escaped String: "+escapedString);\r
  33                 System.out.println();\r
  34                 \r
  35                 str = "http://www.simantics.org/path?query=value";\r
  36                 escapedString = (String) Bindings.STR_VARIANT.create(Bindings.STRING, str);\r
  37                 unescapedString = (String) Bindings.STR_VARIANT.getContent(escapedString, Bindings.STRING);\r
  38                 System.out.println("Unescaped String: "+unescapedString);\r
  39                 System.out.println("Escaped String: "+escapedString);\r
  40                 System.out.println();\r
  41                 \r
  42                 // \r
  43                 // The escaped string is actually a string representation of a variant.\r
  44                 // It contains information of the data type as well.\r
  45                 // Strings are prefixed with "S", Integers with "I", Longs "L",\r
  46                 // Other types are Base64 encoded binary which are not human readable.\r
  47                 //\r
  48                 // \r
  49                 // This means you can convert almost any value Integer, Long, Array, int[], \r
  50                 // Map, Set, Bean-like Class, Immutable-like class to a string and back\r
  51                 // to an object.\r
  52                 //\r
  53                 Object value = 5;\r
  54                 escapedString = (String) Bindings.STR_VARIANT.create(Bindings.INTEGER, value);\r
  55                 Object unescapedObject = (Integer) Bindings.STR_VARIANT.getContent(escapedString, Bindings.INTEGER);\r
  56                 System.out.println("Unescaped Object: "+unescapedObject);\r
  57                 System.out.println("Escaped String: "+escapedString);\r
  58                 System.out.println();\r
  59 \r
  60                 value = new int[] {1, 2, 3, 4, 5, 6};\r
  61                 escapedString = (String) Bindings.STR_VARIANT.create(Bindings.INTEGER, value);\r
  62                 unescapedObject = (int[]) Bindings.STR_VARIANT.getContent(escapedString, Bindings.INTEGER);             \r
  63                 System.out.println("Unescaped Object: "+Arrays.toString((int[]) unescapedObject));\r
  64                 System.out.println("Escaped String: "+escapedString);\r
  65                 System.out.println();\r
  66 \r
  67                 //\r
  68                 // You can change the class to a compatible class with another binding\r
  69                 // int[] -> Integer[]\r
  70                 //\r
  71                 Binding binding1 = Bindings.INT_ARRAY;\r
  72                 Binding binding2 = Bindings.getBinding(Integer[].class);\r
  73                 value = new int[] {1, 2, 3, 4, 5, 6};\r
  74                 escapedString = (String) Bindings.STR_VARIANT.create(binding1, value);\r
  75                 unescapedObject = (Integer[]) Bindings.STR_VARIANT.getContent(escapedString,  binding2);                \r
  76                 System.out.println("Unescaped Object: "+Arrays.toString((Integer[]) unescapedObject));\r
  77                 System.out.println("Escaped String: "+escapedString);\r
  78                 System.out.println();\r
  79 \r
  80                 //\r
  81                 // Binding.getBinding creates a binding for many classes by inspecting the class using a Reflection\r
  82                 //\r
  83                 Binding rectangleBinding = Bindings.getBinding(Rectangle2D.Double.class);\r
  84                 value = new Rectangle2D.Double(10, 10, 200, 200);\r
  85                 escapedString = (String) Bindings.STR_VARIANT.create(rectangleBinding, value);\r
  86                 unescapedObject = (Rectangle2D) Bindings.STR_VARIANT.getContent(escapedString, rectangleBinding);               \r
  87                 System.out.println("Unescaped Object: "+unescapedObject);\r
  88                 System.out.println("Escaped String: "+escapedString);\r
  89                 System.out.println();\r
  90 \r
  91                 //\r
  92                 // ObjectVariantBinding binds many java classes to java.lang.Object\r
  93                 // You can adapt Objects, which are bound as variants, to strings, also bound as variants \r
  94                 //\r
  95                 value = "Some object";\r
  96                 String stringVariant = (String) Bindings.adapt(value, Bindings.OBJECT, Bindings.STR_VARIANT);\r
  97                 Object objectVariant = Bindings.adapt(stringVariant, Bindings.STR_VARIANT, Bindings.OBJECT);\r
  98                 MutableVariant variantVariant = (MutableVariant) Bindings.adapt(stringVariant, Bindings.STR_VARIANT, Bindings.MUTABLE_VARIANT);         \r
  99                 System.out.println("Object Variant: "+objectVariant+" ("+objectVariant.getClass().getName()+")");\r
 100                 System.out.println("String Variant: "+stringVariant);\r
 101                 System.out.println("Variant Variant: "+variantVariant);\r
 102                 System.out.println();\r
 103                 \r
 104         }\r
 105         \r
 106 }\r
 107 \r