public virtual IResult CompileUpdate <TEntity>(TEntity entity) where TEntity : class
{
var entityMetadata = EntityMetadata.Parse(entity);
if (!entityMetadata.HasIdentityAttribute)
{
throw new ArgumentOutOfRangeException($"Can't update entity of type {typeof(TEntity)} because it has no Identity attribute specified.");
}
else if (!entityMetadata.IsValidForInsertOrUpdate)
{
throw new ArgumentOutOfRangeException($"Can't update entity of type {typeof(TEntity)} because there are no attributes to update.");
}
else
{
var sb = new StringBuilder();
var result = new DbCompileResult();
sb.Append($"{Dialect.Update} {entityMetadata.EntityName} {Dialect.Set} ");
var attNameIdx = 0;
foreach (var attribute in entityMetadata.AttributesForInsertOrUpdate)
{
if (attNameIdx > 0)
{
sb.Append(Dialect.Comma);
}
var parameterName = $"{Dialect.ParameterPrefix}P{attNameIdx}";
result.QueryParameters.Add(parameterName, attribute.Value);
sb.Append($"{Dialect.OpeningIdentifier}{attribute.Name}{Dialect.ClosingIdentifier} {Dialect.Equal} {parameterName}");
++attNameIdx;
}
sb.Append($" {Dialect.Where} ");
var IdentityIndex = 0;
foreach (var attribute in entityMetadata.IdentityAttributes)
{
if (IdentityIndex > 0)
{
sb.Append(Dialect.And);
}
var parameterName = $"{Dialect.ParameterPrefix}P{attNameIdx}";
result.QueryParameters.Add(parameterName, attribute.Value);
sb.Append($"{Dialect.OpeningIdentifier}{attribute.Name}{Dialect.ClosingIdentifier} {Dialect.Equal} {parameterName}");
++attNameIdx;
++IdentityIndex;
}
result.SqlQuery = sb.ToString();
return(result);
}
}
public IResult CompileSelect <TEntity>() where TEntity : class
{
var entityMetadata = EntityMetadata.Parse <TEntity>();
var sb = new StringBuilder();
var result = new DbCompileResult();
sb.Append($"{Dialect.Select} * {Dialect.From} {entityMetadata.EntityName}");
result.SqlQuery = sb.ToString();
return(result);
}
public virtual IResult CompileInsert <TEntity>(TEntity entity) where TEntity : class
{
var entityMetadata = EntityMetadata.Parse(entity);
var sb = new StringBuilder();
var result = new DbCompileResult();
sb.Append($"{Dialect.Insert} {entityMetadata.EntityName} {Dialect.StartGroup}");
var attNameIdx = 0;
foreach (var attribute in entityMetadata.AttributesForInsertOrUpdate)
{
if (attNameIdx > 0)
{
sb.Append(Dialect.Comma);
}
sb.Append($"{Dialect.OpeningIdentifier}{attribute.Name}{Dialect.ClosingIdentifier}");
++attNameIdx;
}
sb.Append($"{Dialect.EndGroup} {Dialect.Values} {Dialect.StartGroup}");
attNameIdx = 0;
foreach (var attribute in entityMetadata.AttributesForInsertOrUpdate)
{
if (attNameIdx > 0)
{
sb.Append(Dialect.Comma);
}
var parameterName = $"{Dialect.ParameterPrefix}P{attNameIdx}";
sb.Append(parameterName);
result.QueryParameters.Add(parameterName, attribute.Value);
++attNameIdx;
}
sb.Append(Dialect.EndGroup);
result.SqlQuery = sb.ToString();
return(result);
}
public virtual IResult CompileDelete <TEntity>(Expression <Func <TEntity, bool> > whereExpression) where TEntity : class
{
var entityMetadata = EntityMetadata.Parse <TEntity>();
var sb = new StringBuilder();
var result = new DbCompileResult();
var where = Resolver.Resolve <TEntity>(whereExpression.Body) as DbResolveResult;
sb.Append($"{Dialect.Delete} {entityMetadata.EntityName} {Dialect.Where} {where.SqlQuery}");
result.SqlQuery = sb.ToString();
result.QueryParameters = where.QueryParameters;
return(result);
}
public DbCompileResult MergeWhere(DbCompileResult whereResult, IDialect dialect)
{
int lastParamIndex = QueryParameters.Count;
var query = whereResult.SqlQuery;
foreach (var param in whereResult.QueryParameters)
{
var newParamName = $"{dialect.ParameterPrefix}P{lastParamIndex}";
QueryParameters.Add(newParamName, param.Value);
query = query.Replace(param.Key, newParamName);
lastParamIndex++;
}
var sqlQuery = $"{SqlQuery} {dialect.Where} {query}";
return(this);
}
public virtual IResult CompileUpdate <TEntity>(TEntity entity, Expression <Func <TEntity, bool> > whereExpression) where TEntity : class
{
var entityMetadata = EntityMetadata.Parse(entity);
if (!entityMetadata.IsValidForInsertOrUpdate)
{
throw new ArgumentOutOfRangeException($"Can't update entity of type {typeof(TEntity)} because there are no attributes to update.");
}
else
{
var sb = new StringBuilder();
var result = new DbCompileResult();
sb.Append($"{Dialect.Update} {entityMetadata.EntityName} {Dialect.Set} ");
var attNameIdx = 0;
foreach (var attribute in entityMetadata.AttributesForInsertOrUpdate)
{
if (attNameIdx > 0)
{
sb.Append(Dialect.Comma);
}
var parameterName = $"{Dialect.ParameterPrefix}P{attNameIdx}";
result.QueryParameters.Add(parameterName, attribute.Value);
sb.Append($"{Dialect.OpeningIdentifier}{attribute.Name}{Dialect.ClosingIdentifier} {Dialect.Equal} {parameterName}");
++attNameIdx;
}
result.SqlQuery = sb.ToString();
var where = Resolver.Resolve <TEntity>(whereExpression.Body) as DbResolveResult;
return(result.Merge(where, Dialect));
}
}
