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AggregateVariableModel.cs
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AggregateVariableModel.cs
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using System;
using System.Windows;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Diagnostics.Contracts;
using System.Linq;
namespace Workbench.Core.Models
{
/// <summary>
/// An aggregate variable can hold zero or more variables.
/// </summary>
[Serializable]
public class AggregateVariableModel : VariableModel
{
private VariableModel[] variables;
private VariableDomainExpressionModel domainExpression;
public AggregateVariableModel(string newVariableName, Point newVariableLocation, int aggregateSize, VariableDomainExpressionModel theDomainExpression)
: base(newVariableName, newVariableLocation, theDomainExpression)
{
Contract.Requires<ArgumentException>(!string.IsNullOrWhiteSpace(newVariableName));
Contract.Requires<ArgumentOutOfRangeException>(aggregateSize >= 0);
Contract.Requires<ArgumentNullException>(theDomainExpression != null);
this.DomainExpression = theDomainExpression;
this.variables = new VariableModel[aggregateSize];
for (var i = 0; i < aggregateSize; i++)
this.variables[i] = this.CreateNewVariableAt(i + 1);
}
/// <summary>
/// Initializes an aggregate variable with a name, a size and domain expression.
/// </summary>
public AggregateVariableModel(string theVariableName, int aggregateSize, VariableDomainExpressionModel theDomainExpression)
: base(theVariableName)
{
Contract.Requires<ArgumentException>(!string.IsNullOrWhiteSpace(theVariableName));
Contract.Requires<ArgumentOutOfRangeException>(aggregateSize >= 0);
Contract.Requires<ArgumentNullException>(theDomainExpression != null);
this.DomainExpression = theDomainExpression;
this.variables = new VariableModel[aggregateSize];
for (var i = 0; i < aggregateSize; i++)
this.variables[i] = this.CreateNewVariableAt(i);
}
/// <summary>
/// Initializes an aggregate variable with a name, a size and domain expression.
/// </summary>
public AggregateVariableModel(string variableName, int aggregateSize, string theRawDomainExpression)
: base(variableName)
{
Contract.Requires<ArgumentException>(!string.IsNullOrWhiteSpace(variableName));
Contract.Requires<ArgumentOutOfRangeException>(aggregateSize >= 0);
Contract.Requires<ArgumentNullException>(theRawDomainExpression != null);
this.DomainExpression = new VariableDomainExpressionModel(theRawDomainExpression);
this.variables = new VariableModel[aggregateSize];
for (var i = 0; i < aggregateSize; i++)
this.variables[i] = this.CreateNewVariableAt(i);
}
/// <summary>
/// Initializes an aggregate variable with a name and domain expression.
/// </summary>
public AggregateVariableModel(string variableName, VariableDomainExpressionModel theDomainExpression)
: base(variableName)
{
Contract.Requires<ArgumentException>(!string.IsNullOrWhiteSpace(variableName));
Contract.Requires<ArgumentNullException>(theDomainExpression != null);
this.variables = new VariableModel[0];
this.DomainExpression = theDomainExpression;
}
public AggregateVariableModel(string newVariableName, Point newVariableLocation)
: this(newVariableName)
{
Contract.Requires<ArgumentException>(!string.IsNullOrWhiteSpace(newVariableName));
this.X = newVariableLocation.X;
this.Y = newVariableLocation.Y;
}
/// <summary>
/// Initialize an aggregate variable with a name.
/// </summary>
/// <param name="newName">New variable name.</param>
public AggregateVariableModel(string newName)
: base(newName)
{
Contract.Requires<ArgumentException>(!string.IsNullOrWhiteSpace(newName));
this.variables = new VariableModel[0];
this.DomainExpression = new VariableDomainExpressionModel();
}
/// <summary>
/// Initialize an aggregate variable with default values.
/// </summary>
public AggregateVariableModel()
{
this.variables = new VariableModel[0];
this.DomainExpression = new VariableDomainExpressionModel();
}
/// <summary>
/// Gets the name of the aggregate variable.
/// </summary>
public override string Name
{
get { return base.Name; }
set
{
base.Name = value;
for (var i = 1; i <= this.Variables.Count(); i++)
{
var variable = this.variables[i-1];
variable.Name = this.GetVariableNameFor(i);
}
OnPropertyChanged();
}
}
/// <summary>
/// Gets the variables in the aggregate.
/// </summary>
public IReadOnlyCollection<VariableModel> Variables
{
get
{
if (this.variables == null) return null;
return new ReadOnlyCollection<VariableModel>(this.variables.ToList());
}
}
/// <summary>
/// Gets a count of the variables in the aggregate.
/// </summary>
public int AggregateCount
{
get
{
return this.variables.Length;
}
}
/// <summary>
/// Gets or sets the variable domain expression.
/// </summary>
public new VariableDomainExpressionModel DomainExpression
{
get { return this.domainExpression; }
set
{
Contract.Requires<ArgumentNullException>(value != null);
this.domainExpression = value;
base.DomainExpression = value;
if (this.Variables == null) return;
foreach (var variableModel in this.Variables)
variableModel.DomainExpression = this.domainExpression;
OnPropertyChanged();
}
}
/// <summary>
/// Resize the aggregate variable.
/// </summary>
/// <param name="newAggregateSize">New aggregate size.</param>
public void Resize(int newAggregateSize)
{
Contract.Requires<ArgumentOutOfRangeException>(newAggregateSize > 0);
if (this.variables.Length == newAggregateSize) return;
var originalAggregateSize = this.variables.Length;
Array.Resize(ref this.variables, newAggregateSize);
var newAggregateCount = originalAggregateSize > newAggregateSize ? newAggregateSize : originalAggregateSize;
// Fill the new array elements with a default variable model
for (var i = newAggregateCount; i < newAggregateSize; i++)
this.variables[i] = CreateNewVariableAt(i);
}
/// <summary>
/// Get the variable at the one based index.
/// </summary>
/// <param name="variableIndex">Variable index starts at zero.</param>
/// <returns>Variable at the index.</returns>
public VariableModel GetVariableByIndex(int variableIndex)
{
Contract.Requires<ArgumentOutOfRangeException>(variableIndex < this.Variables.Count()
&& variableIndex >= 0);
return this.variables[variableIndex];
}
/// <summary>
/// Overrides a variable domain expression to a new domain expression.
/// </summary>
/// <param name="variableIndex">Variable index starts at zero.</param>
/// <param name="newDomainExpression">New domain expression.</param>
public void OverrideDomainTo(int variableIndex, VariableDomainExpressionModel newDomainExpression)
{
Contract.Requires<ArgumentOutOfRangeException>(variableIndex < Variables.Count());
Contract.Requires<ArgumentNullException>(newDomainExpression != null);
var variableToOverride = GetVariableByIndex(variableIndex);
#if false
if (!variableToOverride.DomainExpression.IsEmpty)
{
if (!variableToOverride.DomainExpression.Intersects(newDomainExpression))
throw new ArgumentException("newDomainExpression");
}
#endif
variableToOverride.DomainExpression = newDomainExpression;
}
/// <summary>
/// Get the size of the variable.
/// </summary>
/// <returns>Size of the variable.</returns>
public override long GetSize()
{
return AggregateCount;
}
/// <summary>
/// Create a new variable.
/// </summary>
/// <param name="index">Index of the new variable.</param>
/// <returns>A new variable.</returns>
private VariableModel CreateNewVariableAt(int index)
{
Contract.Requires<ArgumentOutOfRangeException>(index <= this.variables.Length);
return new VariableModel(GetVariableNameFor(index), DomainExpression);
}
/// <summary>
/// Get the variable name for the index.
/// </summary>
/// <param name="index">Index the variable is located.</param>
/// <returns>Variable name.</returns>
private string GetVariableNameFor(int index)
{
Contract.Requires<ArgumentOutOfRangeException>(index >= 0);
Contract.Assume(Name != null);
return this.Name + index;
}
}
}