/// <summary>
/// Returns object data.
/// </summary>
/// <returns></returns>
public virtual object Data()
{
if (IsAssigned())
{
return(_containee.Data());
}
return(null);
}
public override bool Unify(AbstractTerm term)
{
if (term.IsReference)
{
term.Assign(this);
return(true);
}
if (term.IsConstant)
{
bool res = term.Data().Equals(this.Data());
return(res);
}
return(false);
}
public void Assign()
{
AbstractTerm term = new AbstractTerm();
ConstantTerm con = new ConstantTerm("ali");
term.Assign(con);
Assert.AreSame(term.Dereference(), con);
Assert.AreSame(term.Dereference(), con.Dereference());
Assert.AreEqual(term.Data(), con.Data());
Assert.AreSame(term.Reference(), con.Reference());
Assert.IsFalse(term.IsList);
Assert.IsFalse(term.IsObject);
Assert.IsFalse(term.IsReference);
Assert.IsFalse(term.IsStructure);
Assert.IsTrue(term.IsConstant);
}
public bool Getproperty(AbstractTerm obj, AbstractTerm method, AbstractTerm returnObject)
{
if (obj.IsConstant)
{
// invoke a static get property
Assembly asm = GetRequiredAssembly(obj.Data() as string, runtime); ;
Type type = asm.GetType(obj.Data() as string);
if (type == null)
{
return false;
}
if (type.GetProperty(method.Data() as string) == null)
{
return false;
}
object res = type.InvokeMember(method.Data() as string, BindingFlags.GetProperty | BindingFlags.Static | BindingFlags.Public, null, null, null);
switch (res.GetType().ToString())
{
case "System.String":
AbstractTerm rC = new ConstantTerm(res.ToString());
if (!returnObject.Unify(rC))
{
return false;
}
break;
case "System.Char":
case "System.Int32":
case "System.Boolean":
AbstractTerm returnConstant = new ConstantTerm(res.ToString());
if (!returnObject.Unify(returnConstant))
{
return false;
}
break;
default:
returnObject.Unify(new ObjectTerm(res));
break;
}
}
else
{
if (obj.Data().GetType().GetProperty(method.Data() as string) == null)
{
return false;
}
// invoke an instance get property
object res = obj.Data().GetType().InvokeMember(method.Data() as string, BindingFlags.Default | BindingFlags.ExactBinding | BindingFlags.GetProperty, null, obj.Data(), null);
switch (res.GetType().ToString())
{
case "System.Char":
case "System.String":
case "System.Int32":
case "System.Boolean":
returnObject.Unify(new ConstantTerm(res.ToString()));
break;
default:
returnObject.Unify(new ObjectTerm(res));
break;
}
}
return true;
}
public void Data()
{
AbstractTerm t = new AbstractTerm();
Assert.IsNull(t.Data());
}
public void Unify_ref_con()
{
AbstractTerm term = new AbstractTerm();
ConstantTerm con = new ConstantTerm();
Assert.IsTrue(term.Unify(con));
Assert.AreEqual(term.Data(), con.Data());
Assert.AreSame(term.Reference(), con.Reference());
Assert.IsTrue(term.IsConstant);
Assert.IsFalse(term.IsReference);
}
public override bool Unify(AbstractTerm term)
{
// Unify with a .NET object
if (term.IsObject)
{
if (_data.Equals(term.Data()))
{
return true;
}
else if (_data == term.Data())
{
return true;
}
return false;
}
// Unify with a constant
if (term.IsConstant)
{
// unify with an int
int v;
float x;
if (Int32.TryParse((string)term.Data(), out v))
{
if (_data.GetType().ToString() == "System.Int32")
{
if (((int)_data) == v)
{
return true;
}
else
{
return false;
}
}
return false;
}
// Unify with a float
else if (float.TryParse((string)term.Data(), out x))
{
if (_data.GetType().ToString() == "System.Float")
{
if (((float)_data) == x)
{
return true;
}
else
{
return false;
}
}
return false;
}
// Unify with a constant atom/string
else
{
if (_data.GetType().ToString() == "System.String")
{
if (((string)_data) == ((string)term.Data()))
{
return true;
}
else
{
return false;
}
}
return false;
}
}
// Unify with a list (need to unify it with an ArrayList)
else
{
return false;
}
// Unify with a structure
// Unify with a reference
}
public override bool Unify(AbstractTerm term)
{
if (term.IsReference)
{
term.Assign(this);
return true;
}
if (term.IsConstant)
{
bool res = term.Data().Equals(this.Data());
return res;
}
return false;
}
public bool Setproperty(AbstractTerm obj, AbstractTerm method, AbstractTerm objValue)
{
if (obj.IsConstant)
{
// invoke a static method
Assembly asm = GetRequiredAssembly(obj.Data() as string, runtime);
Type type = asm.GetType(obj.Data() as string);
if (type == null)
{
return false;
}
ArrayList paramArray = new ArrayList();
ParameterInfo par = type.GetMethod(method.Data() as string).GetParameters()[0];
switch (par.GetType().ToString())
{
case "System.Int32":
paramArray.Add(Int32.Parse(objValue.Data() as string));
break;
case "System.Char":
paramArray.Add(objValue.Data().ToString()[0]);
break;
case "System.String":
paramArray.Add(objValue.Data() as string);
break;
case "System.Boolean":
paramArray.Add(Boolean.Parse(objValue.Data() as string));
break;
default: // pass Variable.Object
paramArray.Add(objValue);
break;
}
object res = type.InvokeMember(method.Data() as string, BindingFlags.Static | BindingFlags.Public | BindingFlags.SetProperty, null, obj, paramArray.ToArray());
switch (res.GetType().ToString())
{
case "System.Char":
case "System.String":
case "System.Int32":
case "System.Boolean":
objValue.Unify(new ConstantTerm(res.ToString()));
break;
default:
objValue.Unify(new ObjectTerm(res));
break;
}
}
else
{
ArrayList paramArray = new ArrayList();
Type t = obj.Data().GetType();
PropertyInfo pInfo = t.GetProperty(method.Data() as string);
if (pInfo == null)
{
return false;
}
if (pInfo.CanWrite == false)
{
return false;
}
switch (pInfo.PropertyType.ToString())
{
case "System.Int32":
paramArray.Add(Int32.Parse(objValue.Data() as string));
break;
case "System.Char":
paramArray.Add(objValue.Data().ToString()[0]);
break;
case "System.String":
paramArray.Add(objValue.Data() as string);
break;
case "System.Boolean":
paramArray.Add(Boolean.Parse(objValue.Data() as string));
break;
default: // pass Variable.Object
paramArray.Add(objValue);
break;
}
object res = obj.Data().GetType().InvokeMember(method.Data() as string, BindingFlags.Default | BindingFlags.ExactBinding | BindingFlags.SetProperty, null, obj.Data(), paramArray.ToArray());
}
return true;
}
public void Unify_con_ref()
{
AbstractTerm term = new AbstractTerm();
ConstantTerm con = new ConstantTerm("ali");
Assert.IsTrue(con.Unify(term));
Assert.AreSame(term.Data(), con.Data());
}
private bool InvokeMethod(AbstractTerm obj, AbstractTerm method, AbstractTerm returnObject, AbstractMachineState state)
{
if (obj.IsConstant)
{
// invoke a static method
Assembly asm = GetRequiredAssembly(obj.Data() as string, state);
Type type = asm.GetType(obj.Data() as string);
if (type == null)
{
return false;
}
ArrayList paramArray = new ArrayList();
GetTypes(type.GetMethod(method.Data() as string), method, ref paramArray, obj);
object[] arguments = paramArray.ToArray();
object res = type.InvokeMember(method.Data() as string, BindingFlags.Static | BindingFlags.Public | BindingFlags.InvokeMethod, null, null, arguments);
switch (res.GetType().ToString())
{
case "System.Char":
case "System.String":
case "System.Int32":
case "System.Boolean":
returnObject.Assign(new ConstantTerm(res.ToString()));
break;
default:
returnObject.Assign(new ObjectTerm(res));
break;
}
SetTypes(method, arguments);
}
else
{
// invoke an instance method
ArrayList paramArray = new ArrayList();
GetTypes(obj.Data().GetType().GetMethod(method.Data() as string), method, ref paramArray, obj);
object classObject = obj.Data();
MethodInfo omi = classObject.GetType().GetMethod(method.Data() as string);
object[] arguments = paramArray.ToArray();
object res = obj.Data().GetType().InvokeMember(method.Data() as string, BindingFlags.Default | BindingFlags.ExactBinding | BindingFlags.InvokeMethod, null, obj.Data(), arguments);
if (res != null)
{
switch (res.GetType().ToString())
{
case "System.String":
ConstantTerm rC = new ConstantTerm(res.ToString());
if (!returnObject.Unify(rC))
{
return false;
}
break;
case "System.Char":
case "System.Int32":
case "System.Boolean":
ConstantTerm returnConstant = new ConstantTerm(res.ToString());
if (!returnObject.Unify(returnConstant))
{
return false;
}
break;
default:
returnObject.Assign(new ObjectTerm(res));
break;
}
}
SetTypes(method, arguments);
}
return true;
}
public override bool Unify(AbstractTerm term)
{
// Unify with a .NET object
if (term.IsObject)
{
if (_data.Equals(term.Data()))
{
return(true);
}
else if (_data == term.Data())
{
return(true);
}
return(false);
}
// Unify with a constant
if (term.IsConstant)
{
// unify with an int
int v;
float x;
if (Int32.TryParse((string)term.Data(), out v))
{
if (_data.GetType().ToString() == "System.Int32")
{
if (((int)_data) == v)
{
return(true);
}
else
{
return(false);
}
}
return(false);
}
// Unify with a float
else if (float.TryParse((string)term.Data(), out x))
{
if (_data.GetType().ToString() == "System.Float")
{
if (((float)_data) == x)
{
return(true);
}
else
{
return(false);
}
}
return(false);
}
// Unify with a constant atom/string
else
{
if (_data.GetType().ToString() == "System.String")
{
if (((string)_data) == ((string)term.Data()))
{
return(true);
}
else
{
return(false);
}
}
return(false);
}
}
// Unify with a list (need to unify it with an ArrayList)
else
{
return(false);
}
// Unify with a structure
// Unify with a reference
}