private Expression computeExpression()
{
Expression expression = null;
try
{
//output will be computed as the name of the stopNode
//AttributeValueExpression with target(cmbTarget) and attribute(cmbSources)
if (selectedExpressionString == "AttributeValueExpression" && secondObjects.Count > selectedSecondObjectIndex && firstObjects.Count > selectedFirstObjectIndex && selectedSecondObjectIndex != -1 && selectedFirstObjectIndex != -1)
{
//get OV and Attribute
SQLAttribute attribute = this.secondObjects[selectedSecondObjectIndex].EaObject as SQLAttribute;
SQLElement targetObjectVariable = this.firstObjects[selectedFirstObjectIndex].EaObject as SQLElement;
AttributeValueExpression avExp = new AttributeValueExpression(repository, attribute, targetObjectVariable);
expression = avExp;
}
//MethodCallExpression with target(cmbTarget) and Method(cmbSources)
else if (selectedExpressionString == "MethodCallExpression" && secondObjects.Count > selectedSecondObjectIndex && firstObjects.Count > selectedFirstObjectIndex && selectedSecondObjectIndex != -1 && selectedFirstObjectIndex != -1)
{
SQLMethod method = this.secondObjects[selectedSecondObjectIndex].EaObject as SQLMethod;
String name = method.Name;
Object target = this.firstObjects[selectedFirstObjectIndex].EaObject;
MethodCallExpression methodCallExpression = EditorMethodCallExpression.generateMethodCallExpression(repository, target, method);
expression = methodCallExpression;
}
//parameterExpression
else if (selectedExpressionString == "ParameterExpression" && firstObjects.Count > selectedFirstObjectIndex && selectedFirstObjectIndex != -1)
{
SQLParameter parameter = this.firstObjects[selectedFirstObjectIndex].EaObject as SQLParameter;
ParameterExpression pExp = new ParameterExpression(repository, parameter);
expression = pExp;
}
//literalExpression
else if (selectedExpressionString == "LiteralExpression")
{
LiteralExpression literalExpression = new LiteralExpression("null");
expression = literalExpression;
}
//objectVariableExpression
else if (selectedExpressionString == "ObjectVariableExpression" && firstObjects.Count > selectedFirstObjectIndex)
{
SQLElement sdmObject = this.firstObjects[selectedFirstObjectIndex].EaObject as SQLElement;
ObjectVariableExpression ovExp = new ObjectVariableExpression(sdmObject, repository);
expression = ovExp;
}
}
catch (Exception)
{
}
return(expression);
}
public static ExpressionControlData getExpressionStringRepresentation(IExpressionProvider provider, Expression expression, SQLRepository repository)
{
ExpressionControlData data = new ExpressionControlData();
Expression providerExpression = expression;
if (providerExpression == null)
{
providerExpression = provider.getProviderExpression();
}
if (providerExpression != null)
{
data.Expression = providerExpression.GetType().Name;
if (data.Expression == "AttributeValueExpression")
{
AttributeValueExpression attributeValueExpression = providerExpression as AttributeValueExpression;
data.First = attributeValueExpression.ObjectVariableName;
data.Second = attributeValueExpression.AttributeName;
}
else if (data.Expression == "MethodCallExpression")
{
MethodCallExpression methodCallExpression = providerExpression as MethodCallExpression;
if (methodCallExpression.Target is ObjectVariableExpression)
{
ObjectVariableExpression ovExp = methodCallExpression.Target as ObjectVariableExpression;
data.First = ovExp.ObjectVariableName;
}
else if (methodCallExpression.Target is ParameterExpression)
{
ParameterExpression pExp = methodCallExpression.Target as ParameterExpression;
data.First = pExp.ParameterName;
}
data.Second = EditorMethodCallExpression.getOperationName(repository, methodCallExpression);
foreach (ParameterBinding parameterBinding in methodCallExpression.OwnedParameterBinding)
{
data.Parameters.Add((parameterBinding.ValueExpression.ToString()));
}
}
else if (data.Expression == "ParameterExpression")
{
ParameterExpression parameterExpression = providerExpression as ParameterExpression;
data.First = parameterExpression.ParameterName;
}
else if (data.Expression == "LiteralExpression")
{
LiteralExpression literalExpression = providerExpression as LiteralExpression;
data.Parameters.Add(literalExpression.Value);
}
else if (data.Expression == "ObjectVariableExpression")
{
ObjectVariableExpression objectVariableExpression = providerExpression as ObjectVariableExpression;
data.First = objectVariableExpression.ObjectVariableName;
}
else if (data.Expression == "TextualExpression")
{
TextualExpression textualExpression = providerExpression as TextualExpression;
data.Expression = "LiteralExpression";
data.Parameters.Add(textualExpression.ExpressionText);
}
}
return(data);
}
