I cannot seem to find anywhere, any examples on how to make use of the GroupFormatter delegate to allow me to add footers to my groups when using the ObjectListView control.
Does anyone have any examples that could demonstrate this? I want to remove the text from the group header and add a footer (different text per footer). As well as changing font, etc.
Any examples would be very helpful.
You can analyze the code for the
public void MakeGroupies<T>(T[] values, string[] descriptions, object[] images, string[] subtitles, string[] tasks)
method of the ObjectListView class. That explicitly sets the GroupKeyGetter, GroupKeyToTitleConverter and GroupFormatter property delegates.
This is C# but your VB adaptation should be straightforward. I am using this small test class as the object type to bind to the list view.
public class TestClass
{
private readonly string _s;
private readonly float _f;
public TestClass( string p1, float p2 )
{
this._s = p1;
this._f = p2;
}
[OLVColumn(DisplayIndex = 1, Name="S", Title="String")]
public string S {get {return this._s;}}
[OLVColumn( DisplayIndex = 2, Name = "F", Title = "Float" )]
public float F {get {return this._f;}}
}
So as not to manually define column traits I am using attributes inside the bound object and a
BrightIdeasSoftware.Generator.GenerateColumns( this.olv, typeof( TestClass ) );
call in the form/user control where I am using the list view. In fact here is the method that completely isolates ObjectListView configuration:
void SetData( TestClass[] objects )
{
// build list columns
Generator.GenerateColumns( this.olv, typeof( TestClass ) );
// use groups and make current column the priimary sort column
this.olv.ShowGroups = true;
this.olv.SortGroupItemsByPrimaryColumn = false;
// loop through columns and set properties
foreach( OLVColumn col in this.olv.Columns )
{
col.Groupable = true;
col.Sortable = true;
if( col.Name == "F" )
{
col.MakeGroupies<float>( new float[] { 10f, 100f, 1000f }, new string[] { "<10", "10-100", "100-1000", ">1000" } );
}
else if( col.Name == "S" )
{
col.UseInitialLetterForGroup = false;
//
col.GroupKeyGetter = ( obj ) =>
{
TestClass tc = (TestClass)obj;
switch( char.ToLower( tc.S[0] ) )
{
case 'a':
case 'e':
case 'i':
case 'o':
case 'u': return true;
default: return false;
}
};
//
col.GroupKeyToTitleConverter = ( o ) => { bool b = (bool)o; return b ? "vowel" : "consonant"; };
//
col.GroupFormatter = ( /*OLVGroup*/ group, /*GroupingParameters*/ parms ) =>
{
string s = string.Format ("{0} {1}", group.GroupId, group.Id);
//group.BottomDescription = "BottomDescription: " + s;
//group.TopDescription = "TopDescription: " + s;
group.Footer = "Footer: " + s;
};
}
}
//
this.olv.RebuildColumns();
//
this.olv.SetObjects( objects );
}
You will definitely have one different footer per each group.
Related
I'm trying to aplicate Flyweight method pattern in a simple .net core Api to see how much memory is saved compared to not using the pattern.
I have two methods, the first one creates 5000 objects without uses the pattern and the another creates 5000 object using the pattern. After each of them create the objects, then they call a method that returns the current memory used by the App.
public class MemoryService : IMemoryService
{
private readonly TreeFactory _treeFactory;
public MemoryService()
{
_treeFactory = new TreeFactory();
}
//create without pattern
public long SetObjectsMemory()
{
List<Tree> trees = new List<Tree>();
for (int i = 0; i < 5000; i++)
{
var tree = new Tree()
{
Id = new Random().Next(1, 9999999),
Part = new PartTree()
{
Name = "Nameany",
Bark = "Barkany",
Color = "Colorany"
}
};
trees.Add(tree);
};
return Utilities.GetCurrentMemoryUsed();
}
//crete with flyweight pattern
public long SetObjectsMemoryFactory()
{
List<Tree> trees = new List<Tree>();
for (int i = 0; i < 5000; i++)
{
var tree = new Tree()
{
Id = new Random().Next(1, 9999999),
Part = _treeFactory.GetPartTree("Nameany", "Barkany", "Colorany")
};
trees.Add(tree);
}
return Utilities.GetCurrentMemoryUsed();
}
}
I use the pattern like a class that uses a list of Parts and return a part object if exists.
public class TreeFactory
{
private static List<PartTree> _parts;
public TreeFactory() {
_parts = new List<PartTree>();
}
public PartTree GetPartTree(string name, string bark, string color)
{
if (_parts.Any(x => x.Name == name && x.Bark == bark && x.Color == color))
{
return _parts.Where(x => x.Name == name && x.Bark == bark && x.Color == color).FirstOrDefault();
}
else {
var newpart = new PartTree()
{
Name = name,
Bark = bark,
Color = color
};
_parts.Add(newpart);
return newpart;
}
}
}
The way to get the current memory used by the App is using Process of this way (in Utilities class):
public static long GetCurrentMemoryUsed() {
Int64 memory;
using (Process proc = Process.GetCurrentProcess())
{
memory = proc.PrivateMemorySize64 / (1024 * 1024);
}
return memory;
}
And in my Startup i inject the MemoryService like a Singleton. In the controller i use 3 methods for call the functions:
[HttpGet, Route(nameof(WeatherForecastController.GenerateMemory))]
public IActionResult GenerateMemory()
{
var total=_memoryService.SetObjectsMemory();
return Ok(total);
}
[HttpGet, Route(nameof(WeatherForecastController.GenerateLiftMemory))]
public IActionResult GenerateLiftMemory()
{
var total = _memoryService.SetObjectsMemoryFactory();
return Ok(total);
}
[HttpGet, Route(nameof(WeatherForecastController.GetMemory))]
public IActionResult GetMemory()
{
var total = Utilities.GetCurrentMemoryUsed();
return Ok(total);
}
The problem is: When i call in the navigator the method in controller without pattern (/weatherforecast/GenerateMemory), then this returns (current)+2mb, but when i call the method
with pattern (/weatherforecast/GenerateLiftMemory) this returns (current)+3mb.
Why the method with pattern flyweight returns more used MB (growing) than the methods without the pattern ??
The repository with the code for test it. Gitlab repository memory api
The code which uses TreeFactory consumes more memory because its GetPartTree method called many times in a loop so as Linq methods Any and Where inside it. Both of these methods create additional Iterator objects under the hood in order to iterate through the collection and it causes additional memory consumption.
I wrote simple benchmark using BenchmarkDotNet with more options to demonstrate the issue
Extended MemoryService
public class MemoryService : IMemoryService
{
private const int TreeCount = 50000;
private readonly TreeFactory _treeFactory;
public MemoryService()
{
_treeFactory = new TreeFactory();
}
//crea objetos en memoria sin patrones
public decimal SetObjectsMemory()
{
List<Tree> trees = new List<Tree>();
for (int i = 0; i < TreeCount; i++)
{
var tree = new Tree()
{
Id = 1,
Part = new PartTree()
{
Name = "Nameany",
Bark = "Barkany",
Color = "Colorany"
}
};
trees.Add(tree);
};
return Utilities.GetCurrentMemoryUsed();
}
//crea objetos en memoria usando patron flyweight
public decimal SetObjectsMemoryFactory()
{
List<Tree> trees = new List<Tree>();
for (int i = 0; i < TreeCount; i++)
{
var tree = new Tree()
{
Id = 1,
Part = _treeFactory.GetPartTree("Nameany", "Barkany", "Colorany")
};
trees.Add(tree);
}
return Utilities.GetCurrentMemoryUsed();
}
public decimal SetObjectsMemoryFactoryImproved()
{
List<Tree> trees = new List<Tree>();
for (int i = 0; i < TreeCount; i++)
{
var tree = new Tree()
{
Id = 1,
Part = _treeFactory.GetPartTreeImproved("Nameany", "Barkany", "Colorany")
};
trees.Add(tree);
}
return Utilities.GetCurrentMemoryUsed();
}
//crea objetos en memoria usando patron flyweight
public decimal SetObjectsMemoryFactoryWithoutLambda()
{
List<Tree> trees = new List<Tree>();
for (int i = 0; i < TreeCount; i++)
{
var tree = new Tree()
{
Id = 1,
Part = _treeFactory.GetPartTreeWithoutLambda("Nameany", "Barkany", "Colorany")
};
trees.Add(tree);
}
return Utilities.GetCurrentMemoryUsed();
}
}
Extended TreeFactory
public class TreeFactory
{
private static List<PartTree> _parts;
public TreeFactory()
{
_parts = new List<PartTree>();
}
public PartTree GetPartTree(string name, string bark, string color)
{
if (_parts.Any(x => x.Name == name && x.Bark == bark && x.Color == color))
{
return _parts.Where(x => x.Name == name && x.Bark == bark && x.Color == color).FirstOrDefault();
}
var newpart = new PartTree()
{
Name = name,
Bark = bark,
Color = color
};
_parts.Add(newpart);
return newpart;
}
public PartTree GetPartTreeImproved(string name, string bark, string color)
{
var existingPart = _parts.Where(x => x.Name == name && x.Bark == bark && x.Color == color).FirstOrDefault();
if (existingPart != null)
return existingPart;
var newpart = new PartTree()
{
Name = name,
Bark = bark,
Color = color
};
_parts.Add(newpart);
return newpart;
}
public PartTree GetPartTreeWithoutLambda(string name, string bark, string color)
{
for (int i = 0; i < _parts.Count; i++)
{
var x = _parts[i];
if (x.Name == name && x.Bark == bark && x.Color == color)
return x;
}
var newpart = new PartTree()
{
Name = name,
Bark = bark,
Color = color
};
_parts.Add(newpart);
return newpart;
}
}
Benchmark in a separate console project
class Program
{
static void Main(string[] args)
{
var result = BenchmarkRunner.Run<MemoryBenchmark>();
}
}
[MemoryDiagnoser]
public class MemoryBenchmark
{
private IMemoryService memoryService;
[GlobalSetup]
public void Setup()
{
memoryService = new MemoryService();
}
[Benchmark]
public object SimpleTrees()
{
var trees = memoryService.SetObjectsMemory();
return trees;
}
[Benchmark]
public object FlyTrees()
{
var trees = memoryService.SetObjectsMemoryFactory();
return trees;
}
[Benchmark]
public object FlyTreesImproved()
{
var trees = memoryService.SetObjectsMemoryFactoryImproved();
return trees;
}
[Benchmark]
public object FlyTreesWithoutLambda()
{
var trees = memoryService.SetObjectsMemoryFactoryWithoutLambda();
return trees;
}
}
And its results
Method
Mean
Error
StdDev
Gen 0
Gen 1
Gen 2
Allocated
SimpleTrees
9.040 ms
0.1804 ms
0.2346 ms
718.7500
453.1250
265.6250
4.44 MB
FlyTrees
19.701 ms
0.1716 ms
0.1521 ms
2500.0000
906.2500
437.5000
15.88 MB
FlyTreesImproved
18.075 ms
0.2869 ms
0.2684 ms
1781.2500
625.0000
312.5000
10.92 MB
FlyTreesWithoutLambda
4.919 ms
0.0273 ms
0.0242 ms
421.8750
281.2500
281.2500
2.53 MB
We insert a point cloud in Revit and have to move and rotate it in several axles to get a good world alignment. We then need to apply the same transforms to a Revit MEP link that contains edgwise piping.
I have acquired the 3x4 matrix from the point cloud in revit, I would like to apply that to the revit mep link so that they are in alignment.
I have successfully applied the translation portion of the transform, I am stuck on the rotation portion. Could someone please assist with this. Dyslexia and Matrices do not work well together.
Thanks to Jeremy at the Building Coder for getting me this far!
9/4/19 - I edited the rotational part of the code, however the "ElementTransformUtils.RotateElement" does not have any effect on the link in Revit.
Autodesk.Revit.DB.View
pView = ActiveUIDocument.Document.ActiveView;Autodesk.Revit.DB.Transaction
t = new Autodesk.Revit.DB.Transaction(ActiveUIDocument.Document, "EdgewiseCoordination");
t.Start();
UIDocument uidoc = this.ActiveUIDocument;
Document document = uidoc.Document;
Autodesk.Revit.ApplicationServices.Application application = document.Application;
ElementId elementid = null;
elementid = uidoc.Selection.PickObject(ObjectType.Element, "Select element to Copy Transform or ESC to reset the view").ElementId;
Element e = document.GetElement(elementid);
Instance ei = e as Instance;
Transform pct = ei.GetTransform();
ElementId elementid2 = null;
elementid2 = uidoc.Selection.PickObject(ObjectType.Element, "Select element to Apply Transform or ESC to reset the view").ElementId;
Element e2 = document.GetElement(elementid2);
Instance ei2 = e2 as Instance;
ElementTransformUtils.MoveElement(document,elementid2,pct.Origin);
Line lineaxis = GetRotationAxisFromTransform(pct);
double tangle = GetRotationAngleFromTransform(pct);
ElementTransformUtils.RotateElement(document,elementid2,lineaxis,tangle);
t.Commit();
}
private static Line GetRotationAxisFromTransform(Transform transform)
{
double x = transform.BasisY.Z - transform.BasisZ.Y;
double y = transform.BasisZ.X - transform.BasisX.Z;
double z = transform.BasisX.Y - transform.BasisY.X;
return Line.CreateUnbound(transform.Origin, new XYZ(x, y, z));
}
private static double GetRotationAngleFromTransform(Transform transform)
{
double x = transform.BasisX.X;
double y = transform.BasisY.Y;
double z = transform.BasisZ.Z;
double trace = x + y + z;
return Math.Acos((trace - 1) / 2.0);
}
Earlier Code to save out the transform----------------------------------
public void Objectlocation()
{
Autodesk.Revit.DB.View
pView = ActiveUIDocument.Document.ActiveView;Autodesk.Revit.DB.Transaction
t = new Autodesk.Revit.DB.Transaction(ActiveUIDocument.Document, "Objectlocation");
t.Start();
UIDocument uidoc = this.ActiveUIDocument;
Document document = uidoc.Document;
Autodesk.Revit.ApplicationServices.Application application = document.Application;
ElementId elementid = null;
elementid = uidoc.Selection.PickObject(ObjectType.Element, "Select element or ESC to reset the view").ElementId;
Element e = document.GetElement(elementid);
Instance ei = e as Instance;
Transform pct = ei.GetTransform();
//string spctrans = TransformString(pct);
//TaskDialog.Show("Point Cloud Transform", spctrans);
//spctrans = (spctrans + ",0,0,0,1");
string slocx = TransformStringX(pct);
string slocy = TransformStringY(pct);
string slocz = TransformStringZ(pct);
string slocation = (slocx + "," + slocy + "," + slocz + ",0,0,0,1");
using (StreamWriter sw = new StreamWriter("test.txt"))
{
sw.WriteLine(slocation);
}
t.Commit();
}
static public string RealString( double a )
{
return a.ToString( "0.####################" );
}
static public string PointStringX( XYZ p )
{
double convunit = 0;
convunit = UnitUtils.ConvertFromInternalUnits(p.X,DisplayUnitType.DUT_DECIMAL_INCHES);
return string.Format( "{0}", RealString( convunit ));
}
static public string TransformStringX( Transform t )
{
return string.Format( "{0},{1},{2},{3}", PointStringX( t.BasisX ),
PointStringX( t.BasisY ), PointStringX( t.BasisZ ), PointStringX( t.Origin ) );
}
static public string PointStringY( XYZ p )
{
double convunit = 0;
convunit = UnitUtils.ConvertFromInternalUnits(p.Y,DisplayUnitType.DUT_DECIMAL_INCHES);
return string.Format( "{0}", RealString( convunit ));
}
static public string TransformStringY( Transform t )
{
return string.Format( "{0},{1},{2},{3}", PointStringY( t.BasisX ),
PointStringY( t.BasisY ), PointStringY( t.BasisZ ), PointStringY( t.Origin ) );
}
static public string PointStringZ( XYZ p )
{
double convunit = 0;
convunit = UnitUtils.ConvertFromInternalUnits(p.Z,DisplayUnitType.DUT_DECIMAL_INCHES);
return string.Format( "{0}", RealString( convunit ));
}
static public string TransformStringZ( Transform t )
{
return string.Format( "{0},{1},{2},{3}", PointStringZ( t.BasisX ),
PointStringZ( t.BasisY ), PointStringZ( t.BasisZ ), PointStringZ( t.Origin ) );
}
I edited the stuff you had on bcoder to split up the matrix in order to match the acad api that I was feeding it into.
ACAD API below-----------------------------------------------------------
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.EditorInput;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.Geometry;
using Autodesk.AutoCAD.Runtime;
using System.Reflection;
namespace Transformer
{
public class Commands
{
[CommandMethod("TRANS", CommandFlags.UsePickSet)]
static public void TransformEntity()
{
Document doc =
Application.DocumentManager.MdiActiveDocument;
Database db = doc.Database;
Editor ed = doc.Editor;
// Our selected entity (only one supported, for now)
ObjectId id;
// First query the pickfirst selection set
PromptSelectionResult psr = ed.SelectImplied();
if (psr.Status != PromptStatus.OK || psr.Value == null)
{
// If nothing selected, ask the user
PromptEntityOptions peo =
new PromptEntityOptions(
"\nSelect entity to transform: "
);
PromptEntityResult per = ed.GetEntity(peo);
if (per.Status != PromptStatus.OK)
return;
id = per.ObjectId;
}
else
{
// If the pickfirst set has one entry, take it
SelectionSet ss = psr.Value;
if (ss.Count != 1)
{
ed.WriteMessage(
"\nThis command works on a single entity."
);
return;
}
ObjectId[] ids = ss.GetObjectIds();
id = ids[0];
}
PromptResult pr = ed.GetString("\nEnter property name: ");
if (pr.Status != PromptStatus.OK)
return;
string prop = pr.StringResult;
// Now let's ask for the matrix string
pr = ed.GetString("\nEnter matrix values: ");
if (pr.Status != PromptStatus.OK)
return;
// Split the string into its individual cells
string[] cells = pr.StringResult.Split(new char[] { ',' });
if (cells.Length != 16)
{
ed.WriteMessage("\nMust contain 16 entries.");
return;
}
try
{
// Convert the array of strings into one of doubles
double[] data = new double[cells.Length];
for (int i = 0; i < cells.Length; i++)
{
data[i] = double.Parse(cells[i]);
}
// Create a 3D matrix from our cell data
Matrix3d mat = new Matrix3d(data);
// Now we can transform the selected entity
Transaction tr =
doc.TransactionManager.StartTransaction();
using (tr)
{
Entity ent =
tr.GetObject(id, OpenMode.ForWrite)
as Entity;
if (ent != null)
{
bool transformed = false;
// If the user specified a property to modify
if (!string.IsNullOrEmpty(prop))
{
// Query the property's value
object val =
ent.GetType().InvokeMember(
prop, BindingFlags.GetProperty, null, ent, null
);
// We only know how to transform points and vectors
if (val is Point3d)
{
// Cast and transform the point result
Point3d pt = (Point3d)val,
res = pt.TransformBy(mat);
// Set it back on the selected object
ent.GetType().InvokeMember(
prop, BindingFlags.SetProperty, null,
ent, new object[] { res }
);
transformed = true;
}
else if (val is Vector3d)
{
// Cast and transform the vector result
Vector3d vec = (Vector3d)val,
res = vec.TransformBy(mat);
// Set it back on the selected object
ent.GetType().InvokeMember(
prop, BindingFlags.SetProperty, null,
ent, new object[] { res }
);
transformed = true;
}
}
// If we didn't transform a property,
// do the whole object
if (!transformed)
ent.TransformBy(mat);
}
tr.Commit();
}
}
catch (Autodesk.AutoCAD.Runtime.Exception ex)
{
ed.WriteMessage(
"\nCould not transform entity: {0}", ex.Message
);
}
}
}
}
END ACAD API
I am using script component in ssis with C# code using Microsoft.Analysisservices namespace to fetch the cube metadata. The code looks somewhat like this
using System;
using System.Data;
using Microsoft.SqlServer.Dts.Pipeline.Wrapper;
using Microsoft.SqlServer.Dts.Runtime.Wrapper;
using Microsoft.AnalysisServices;
using System.Windows.Forms;
[Microsoft.SqlServer.Dts.Pipeline.SSISScriptComponentEntryPointAttribute]
public class ScriptMain : UserComponent
{
//IDTSConnectionManager100 connMgr;
Server OLAPServer = new Server();
public override void AcquireConnections(object Transaction)
{
OLAPServer.Connect(this.Connections.OLAPConnection.ConnectionString);
}
public override void PreExecute()
{
base.PreExecute();
/*
Add your code here for preprocessing or remove if not needed
*/
}
public override void PostExecute()
{
base.PostExecute();
/*
Add your code here for postprocessing or remove if not needed
You can set read/write variables here, for example:
Variables.MyIntVar = 100
*/
}
public override void CreateNewOutputRows()
{
IDTSVariables100 vars = null;
string OLAPDBName;
VariableDispenser.LockOneForRead("OLAPDBName", ref vars);
Database OLAPDB;
OLAPDBName = vars[0].Value.ToString();
try
{
OLAPDB = OLAPServer.Databases.GetByName(OLAPDBName);
}
catch
{
return;
}
// loop through cubes
CubeCollection Cubes = OLAPDB.Cubes;
MeasureGroupCollection Mgroups;
CubeDimensionCollection Dimensions;
MeasureGroupDimensionCollection MgroupDims;
DimensionAttributeCollection Attributes;
foreach (Cube cb in Cubes)
{
//Test for one Measure Group
//MeasureGroup mgroup = Mgroups.GetByName("Inward Exposure");
Mgroups = cb.MeasureGroups;
// all dimensions associated with that Measure Group
// loop through Measure Groups
foreach (MeasureGroup mg in Mgroups)
{
// loop though all cube dimensions
Dimensions = cb.Dimensions;**strong text**
foreach (CubeDimension dim in Dimensions)
{
bool CanBeAnalysed = false;**strong text**
// loop through dimensions and see if dimension exists in mgroupDims (ie check if it can be analysed)
MgroupDims = mg.Dimensions;
foreach (MeasureGroupDimension mgd in MgroupDims)
{
if (mgd.CubeDimension == dim)
{
CanBeAnalysed = true;
break;
}
}
// loop through each Measure and Attribute a
String DimName = dim.Name;
bool DimVisible = dim.Visible;
String MgroupName = mg.Name;
String CubeName = cb.Name;
String MeasureExpression;
String Description;
// for every attribute in dimension
Attributes = dim.Dimension.Attributes;
foreach (DimensionAttribute Attr in Attributes)
{
String AttrName = Attr.Name;
bool AttrVisible = Attr.AttributeHierarchyVisible;
String AttrNameColumn = Attr.NameColumn.ToString();
String AttributeRelationship = Attr.AttributeRelationships.ToString();
// get every measure in measuregroup
foreach (Measure m in mg.Measures)
{
String MeasureName = m.Name.ToString();
bool MeasureVisible = m.Visible;
String MeasureNameColumn = m.Source.ToString();
if (m.MeasureExpression != null)
{
// MessageBox.Show(m.MeasureExpression.ToString());
MeasureExpression = m.MeasureExpression.ToString();
}
else
{
// MessageBox.Show(m.MeasureExpression.ToString());
MeasureExpression = " " ;
}
if (m.Description != null)
{
// MessageBox.Show(m.MeasureExpression.ToString());
Description = m.Description.ToString();
}
else
{
// MessageBox.Show(m.MeasureExpression.ToString());
Description = " ";
}
Output0Buffer.AddRow();
Output0Buffer.OLAPDBName = OLAPDBName;
Output0Buffer.CubeName = CubeName;
Output0Buffer.DimensionName = DimName;
Output0Buffer.DimensionVisible = DimVisible;
Output0Buffer.AttrDDSColumn = AttrNameColumn;
Output0Buffer.AttrName = AttrName;
Output0Buffer.AttrVisible = AttrVisible;
Output0Buffer.MeasureGroupName = MgroupName;
Output0Buffer.MeasureName = MeasureName;
Output0Buffer.MeasureVisible = MeasureVisible;
Output0Buffer.MeasureDDSColumn = MeasureNameColumn;
Output0Buffer.IsAnalysable = CanBeAnalysed;
Output0Buffer.MeasureExpression = MeasureExpression;
Output0Buffer.Description = Description;
Output0Buffer.AttributeRelationship = AttributeRelationship;
}
}
} // end of Cube Dim Loop
} // end of Measure Group loop
} // end of cube loop
}
}
I was successful in getting the cube metadata with the above code.However, i am stuck at getting the metadata of the perspective cube and the Relationships of the measure groups i.e whether the measure groups are many-many. Any help is very much appreciated.
Here is some code for detecting dimension relationships including many-to-many. See the GetDimensionUsage function:
https://raw.githubusercontent.com/BIDeveloperExtensions/bideveloperextensions/master/SSAS/PrinterFriendlyDimensionUsage.cs
Here is some code around navigating perspectives:
https://raw.githubusercontent.com/BIDeveloperExtensions/bideveloperextensions/master/SSAS/TriStatePerspectivesPlugin.cs
Start reading around the following line:
if (perspective.MeasureGroups.Contains(mg.Name))
I am trying to serialize Guava Range objects to JSON using Gson, however the default serialization fails, and I'm unsure how to correctly implement a TypeAdapter for this generic type.
Gson gson = new Gson();
Range<Integer> range = Range.closed(10, 20);
String json = gson.toJson(range);
System.out.println(json);
Range<Integer> range2 = gson.fromJson(json,
new TypeToken<Range<Integer>>(){}.getType());
System.out.println(range2);
assertEquals(range2, range);
This fails like so:
{"lowerBound":{"endpoint":10},"upperBound":{"endpoint":20}}
PASSED: typeTokenInterface
FAILED: range
java.lang.RuntimeException: Unable to invoke no-args constructor for
com.google.common.collect.Cut<java.lang.Integer>. Register an
InstanceCreator with Gson for this type may fix this problem.
at com.google.gson.internal.ConstructorConstructor$12.construct(
ConstructorConstructor.java:210)
...
Note that the default serialization actually loses information - it fails to report whether the endpoints are open or closed. I would prefer to see it serialized similar to its toString(), e.g. [10‥20] however simply calling toString() won't work with generic Range instances, as the elements of the range may not be primitives (Joda-Time LocalDate instances, for example). For the same reason, implementing a custom TypeAdapter seems difficult, as we don't know how to deserialize the endpoints.
I've implemented most of a TypeAdaptorFactory based on the template provided for Multimap which ought to work, but now I'm stuck on the generics. Here's what I have so far:
public class RangeTypeAdapterFactory implements TypeAdapterFactory {
public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> typeToken) {
Type type = typeToken.getType();
if (typeToken.getRawType() != Range.class
|| !(type instanceof ParameterizedType)) {
return null;
}
Type elementType = ((ParameterizedType) type).getActualTypeArguments()[0];
TypeAdapter<?> elementAdapter = (TypeAdapter<?>)gson.getAdapter(TypeToken.get(elementType));
// Bound mismatch: The generic method newRangeAdapter(TypeAdapter<E>) of type
// GsonUtils.RangeTypeAdapterFactory is not applicable for the arguments
// (TypeAdapter<capture#4-of ?>). The inferred type capture#4-of ? is not a valid
// substitute for the bounded parameter <E extends Comparable<?>>
return (TypeAdapter<T>) newRangeAdapter(elementAdapter);
}
private <E extends Comparable<?>> TypeAdapter<Range<E>> newRangeAdapter(final TypeAdapter<E> elementAdapter) {
return new TypeAdapter<Range<E>>() {
#Override
public void write(JsonWriter out, Range<E> value) throws IOException {
if (value == null) {
out.nullValue();
return;
}
String repr = (value.lowerBoundType() == BoundType.CLOSED ? "[" : "(") +
(value.hasLowerBound() ? elementAdapter.toJson(value.lowerEndpoint()) : "-\u221e") +
'\u2025' +
(value.hasLowerBound() ? elementAdapter.toJson(value.upperEndpoint()) : "+\u221e") +
(value.upperBoundType() == BoundType.CLOSED ? "]" : ")");
out.value(repr);
}
public Range<E> read(JsonReader in) throws IOException {
if (in.peek() == JsonToken.NULL) {
in.nextNull();
return null;
}
String[] endpoints = in.nextString().split("\u2025");
E lower = elementAdapter.fromJson(endpoints[0].substring(1));
E upper = elementAdapter.fromJson(endpoints[1].substring(0,endpoints[1].length()-1));
return Range.range(lower, endpoints[0].charAt(0) == '[' ? BoundType.CLOSED : BoundType.OPEN,
upper, endpoints[1].charAt(endpoints[1].length()-1) == '[' ? BoundType.CLOSED : BoundType.OPEN);
}
};
}
}
However the return (TypeAdapter<T>) newRangeAdapter(elementAdapter); line has a compilation error and I'm now at a loss.
What's the best way to resolve this error? Is there a better way to serialize Range objects that I'm missing? What about if I want to serialize RangeSets?
Rather frustrating that the Google utility library and Google serialization library seem to require so much glue to work together :(
This feels somewhat like reinventing the wheel, but it was a lot quicker to put together and test than the time spent trying to get Gson to behave, so at least presently I'll be using the following Converters to serialize Range and RangeSet*, rather than Gson.
/**
* Converter between Range instances and Strings, essentially a custom serializer.
* Ideally we'd let Gson or Guava do this for us, but presently this is cleaner.
*/
public static <T extends Comparable<? super T>> Converter<Range<T>, String> rangeConverter(final Converter<T, String> elementConverter) {
final String NEG_INFINITY = "-\u221e";
final String POS_INFINITY = "+\u221e";
final String DOTDOT = "\u2025";
return new Converter<Range<T>, String>() {
#Override
protected String doForward(Range<T> range) {
return (range.hasLowerBound() && range.lowerBoundType() == BoundType.CLOSED ? "[" : "(") +
(range.hasLowerBound() ? elementConverter.convert(range.lowerEndpoint()) : NEG_INFINITY) +
DOTDOT +
(range.hasUpperBound() ? elementConverter.convert(range.upperEndpoint()) : POS_INFINITY) +
(range.hasUpperBound() && range.upperBoundType() == BoundType.CLOSED ? "]" : ")");
}
#Override
protected Range<T> doBackward(String range) {
String[] endpoints = range.split(DOTDOT);
Range<T> ret = Range.all();
if(!endpoints[0].substring(1).equals(NEG_INFINITY)) {
T lower = elementConverter.reverse().convert(endpoints[0].substring(1));
ret = ret.intersection(Range.downTo(lower, endpoints[0].charAt(0) == '[' ? BoundType.CLOSED : BoundType.OPEN));
}
if(!endpoints[1].substring(0,endpoints[1].length()-1).equals(POS_INFINITY)) {
T upper = elementConverter.reverse().convert(endpoints[1].substring(0,endpoints[1].length()-1));
ret = ret.intersection(Range.upTo(upper, endpoints[1].charAt(endpoints[1].length()-1) == ']' ? BoundType.CLOSED : BoundType.OPEN));
}
return ret;
}
};
}
/**
* Converter between RangeSet instances and Strings, essentially a custom serializer.
* Ideally we'd let Gson or Guava do this for us, but presently this is cleaner.
*/
public static <T extends Comparable<? super T>> Converter<RangeSet<T>, String> rangeSetConverter(final Converter<T, String> elementConverter) {
return new Converter<RangeSet<T>, String>() {
private final Converter<Range<T>, String> rangeConverter = rangeConverter(elementConverter);
#Override
protected String doForward(RangeSet<T> rs) {
ArrayList<String> ls = new ArrayList<>();
for(Range<T> range : rs.asRanges()) {
ls.add(rangeConverter.convert(range));
}
return Joiner.on(", ").join(ls);
}
#Override
protected RangeSet<T> doBackward(String rs) {
Iterable<String> parts = Splitter.on(",").trimResults().split(rs);
ImmutableRangeSet.Builder<T> build = ImmutableRangeSet.builder();
for(String range : parts) {
build.add(rangeConverter.reverse().convert(range));
}
return build.build();
}
};
}
*For inter-process communication, Java serialization would likely work just fine, as both classes implement Serializable. However I'm serializing to disk for more permanent storage, meaning I need a format I can trust won't change over time. Guava's serialization doesn't provide that guarantee.
Here is a Gson JsonSerializer and JsonDeserializer that generically supports a Range: https://github.com/jamespedwards42/Fava/wiki/Range-Marshaller
#Override
public JsonElement serialize(final Range src, final Type typeOfSrc, final JsonSerializationContext context) {
final JsonObject jsonObject = new JsonObject();
if ( src.hasLowerBound() ) {
jsonObject.add( "lowerBoundType", context.serialize( src.lowerBoundType() ) );
jsonObject.add( "lowerBound", context.serialize( src.lowerEndpoint() ) );
} else
jsonObject.add( "lowerBoundType", context.serialize( BoundType.OPEN ) );
if ( src.hasUpperBound() ) {
jsonObject.add( "upperBoundType", context.serialize( src.upperBoundType() ) );
jsonObject.add( "upperBound", context.serialize( src.upperEndpoint() ) );
} else
jsonObject.add( "upperBoundType", context.serialize( BoundType.OPEN ) );
return jsonObject;
}
#Override
public Range<? extends Comparable<?>> deserialize(final JsonElement json, final Type typeOfT, final JsonDeserializationContext context) throws JsonParseException {
if ( !( typeOfT instanceof ParameterizedType ) )
throw new IllegalStateException( "typeOfT must be a parameterized Range." );
final JsonObject jsonObject = json.getAsJsonObject();
final JsonElement lowerBoundTypeJsonElement = jsonObject.get( "lowerBoundType" );
final JsonElement upperBoundTypeJsonElement = jsonObject.get( "upperBoundType" );
if ( lowerBoundTypeJsonElement == null || upperBoundTypeJsonElement == null )
throw new IllegalStateException( "Range " + json
+ "was not serialized with this serializer! The default serialization does not store the boundary types, therfore we can not deserialize." );
final Type type = ( ( ParameterizedType ) typeOfT ).getActualTypeArguments()[0];
final BoundType lowerBoundType = context.deserialize( lowerBoundTypeJsonElement, BoundType.class );
final JsonElement lowerBoundJsonElement = jsonObject.get( "lowerBound" );
final Comparable<?> lowerBound = lowerBoundJsonElement == null ? null : context.deserialize( lowerBoundJsonElement, type );
final BoundType upperBoundType = context.deserialize( upperBoundTypeJsonElement, BoundType.class );
final JsonElement upperBoundJsonElement = jsonObject.get( "upperBound" );
final Comparable<?> upperBound = upperBoundJsonElement == null ? null : context.deserialize( upperBoundJsonElement, type );
if ( lowerBound == null && upperBound != null )
return Range.upTo( upperBound, upperBoundType );
else if ( lowerBound != null && upperBound == null )
return Range.downTo( lowerBound, lowerBoundType );
else if ( lowerBound == null && upperBound == null )
return Range.all();
return Range.range( lowerBound, lowerBoundType, upperBound, upperBoundType );
}
Here is a straight forward solution. Works very well
import com.google.common.collect.BoundType;
import com.google.common.collect.Range;
import com.google.gson.*;
import java.lang.reflect.Type;
public class GoogleRangeAdapter implements JsonSerializer, JsonDeserializer {
public static String TK_hasLowerBound = "hasLowerBound";
public static String TK_hasUpperBound = "hasUpperBound";
public static String TK_lowerBoundType = "lowerBoundType";
public static String TK_upperBoundType = "upperBoundType";
public static String TK_lowerBound = "lowerBound";
public static String TK_upperBound = "upperBound";
#Override
public Object deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
JsonObject jsonObject = (JsonObject)json;
boolean hasLowerBound = jsonObject.get(TK_hasLowerBound).getAsBoolean();
boolean hasUpperBound = jsonObject.get(TK_hasUpperBound).getAsBoolean();
if (!hasLowerBound && !hasUpperBound) {
return Range.all();
}
else if (!hasLowerBound && hasUpperBound){
double upperBound = jsonObject.get(TK_upperBound).getAsDouble();
BoundType upperBoundType = BoundType.valueOf(jsonObject.get(TK_upperBoundType).getAsString());
if (upperBoundType == BoundType.OPEN)
return Range.lessThan(upperBound);
else
return Range.atMost(upperBound);
}
else if (hasLowerBound && !hasUpperBound){
double lowerBound = jsonObject.get(TK_lowerBound).getAsDouble();
BoundType lowerBoundType = BoundType.valueOf(jsonObject.get(TK_lowerBoundType).getAsString());
if (lowerBoundType == BoundType.OPEN)
return Range.greaterThan(lowerBound);
else
return Range.atLeast(lowerBound);
}
else {
double lowerBound = jsonObject.get(TK_lowerBound).getAsDouble();
double upperBound = jsonObject.get(TK_upperBound).getAsDouble();
BoundType upperBoundType = BoundType.valueOf(jsonObject.get(TK_upperBoundType).getAsString());
BoundType lowerBoundType = BoundType.valueOf(jsonObject.get(TK_lowerBoundType).getAsString());
if (lowerBoundType == BoundType.OPEN && upperBoundType == BoundType.OPEN)
return Range.open(lowerBound, upperBound);
else if (lowerBoundType == BoundType.OPEN && upperBoundType == BoundType.CLOSED)
return Range.openClosed(lowerBound, upperBound);
else if (lowerBoundType == BoundType.CLOSED && upperBoundType == BoundType.OPEN)
return Range.closedOpen(lowerBound, upperBound);
else
return Range.closed(lowerBound, upperBound);
}
}
#Override
public JsonElement serialize(Object src, Type typeOfSrc, JsonSerializationContext context) {
JsonObject jsonObject = new JsonObject();
Range<Double> range = (Range<Double>)src;
boolean hasLowerBound = range.hasLowerBound();
boolean hasUpperBound = range.hasUpperBound();
jsonObject.addProperty(TK_hasLowerBound, hasLowerBound);
jsonObject.addProperty(TK_hasUpperBound, hasUpperBound);
if (hasLowerBound) {
jsonObject.addProperty(TK_lowerBound, range.lowerEndpoint());
jsonObject.addProperty(TK_lowerBoundType, range.lowerBoundType().name());
}
if (hasUpperBound) {
jsonObject.addProperty(TK_upperBound, range.upperEndpoint());
jsonObject.addProperty(TK_upperBoundType, range.upperBoundType().name());
}
return jsonObject;
}
}
I've read a possible solution to this, but would require a lot of rewriting, the possible solution is linked here, but there wouldn't be any sense to doing it that way if I am just a couple words off in my dropdownlistfor.
I'm having an issue with my dropdownlistfor as this is all new to me:
#Html.DropDownListFor(model => model.pageID, new SelectList (Enum.GetNames(typeof(PageIndex)), EnumHelper.GetSelectedItemList<PageIndex>().SelectedValue))
Trying to grab the "description" of my enum values as the drop down lists text values, then have an integer value returned to the database on POST.
Here's my enum:
public enum PageIndex : int
{
[Description("Developmental Disabilities Tip Sheet")]
ddTipSheets = 1,
[Description("Hiiiiiiiiiiiiiiiiiiii")]
Example1 = 2,
[Description("I don't know what I'm doing")]
Example2 = 3
};
and my EnumHelper:
public class EnumHelper
{
public static SelectList GetSelectedItemList<T>() where T : struct
{
T t = default(T);
if (!t.GetType().IsEnum) { throw new ArgumentNullException("Please make sure that T is of Enum Type"); }
var nameList = t.GetType().GetEnumNames();
int counter = 0;
Dictionary<int, String> myDictionary = new Dictionary<int, string>();
if (nameList != null && nameList.Length > 0)
{
foreach (var name in nameList)
{
T newEnum = (T) Enum.Parse(t.GetType(), name);
string description = getDescriptionFromEnumValue(newEnum as Enum);
if (!myDictionary.ContainsKey(counter))
{
myDictionary.Add(counter, description);
}
counter++;
}
counter = 0;
return new SelectList(myDictionary, "Key", "Value");
}
return null;
}
private static string getDescriptionFromEnumValue(Enum value)
{
DescriptionAttribute descriptionAttribute =
value.GetType()
.GetField(value.ToString())
.GetCustomAttributes(typeof(DescriptionAttribute), false)
.SingleOrDefault() as DescriptionAttribute;
return descriptionAttribute == null ?
value.ToString() : descriptionAttribute.Description;
}
}