public override string ToString()
{
object[] _;
var visitor = new CqlExpressionVisitor();
visitor.Evaluate(Expression);
return visitor.GetUpdate(out _, _ttl, _timestamp, false);
}
public override string CqlString()
{
var visitor = new CqlExpressionVisitor();
visitor.Evaluate(Expression);
return(visitor.GetCount());
}
protected override string GetCql()
{
var visitor = new CqlExpressionVisitor();
visitor.Evaluate(Expression);
return(visitor.GetDelete());
}
/// <summary>
/// Evaluates the Linq query, executes asynchronously the cql statement and adapts the results.
/// </summary>
public Task <IEnumerable <TEntity> > ExecuteAsync()
{
bool withValues = GetTable().GetSession().BinaryProtocolVersion > 1;
var visitor = new CqlExpressionVisitor();
visitor.Evaluate(Expression);
object[] values;
string cql = visitor.GetSelect(out values, withValues);
var adaptation =
InternalExecuteAsync(cql, values).ContinueWith((t) =>
{
var rs = t.Result;
QueryTrace = rs.Info.QueryTrace;
CqlColumn[] cols = rs.Columns;
var colToIdx = new Dictionary <string, int>();
for (int idx = 0; idx < cols.Length; idx++)
{
colToIdx.Add(cols[idx].Name, idx);
}
return(AdaptRows(rs, colToIdx, visitor));
}, TaskContinuationOptions.ExecuteSynchronously);
return(adaptation);
}
public override IAsyncResult BeginExecute(AsyncCallback callback, object state)
{
var visitor = new CqlExpressionVisitor();
visitor.Evaluate(Expression);
return(InternalBeginExecute(visitor.GetSelect(), visitor.Mappings, visitor.Alter, callback, state));
}
protected override string GetCql(out object[] values)
{
bool withValues = GetTable().GetSession().BinaryProtocolVersion > 1;
var visitor = new CqlExpressionVisitor();
visitor.Evaluate(Expression);
return visitor.GetUpdate(out values, _ttl, _timestamp, withValues);
}
private Expression FillUpdateProjection(MemberExpression node)
{
PocoColumn column;
if (node.Expression == null || node.Expression.NodeType != ExpressionType.Parameter)
{
column = _pocoData.GetColumnByMemberName(_currentBindingName.Get());
if (column == null)
{
throw new InvalidOperationException("No mapping defined for member: " + node.Member.Name);
}
if (column.IsCounter)
{
var value = CqlExpressionVisitor.GetClosureValue(node);
if (!(value is long || value is int))
{
throw new ArgumentException("Only Int64 and Int32 values are supported as counter increment of decrement values");
}
_projections.Add(Tuple.Create(column, value, ExpressionType.Increment));
return(node);
}
AddProjection(node, column);
return(node);
}
column = _pocoData.GetColumnByMemberName(node.Member.Name);
if (column == null)
{
throw new InvalidOperationException("No mapping defined for member: " + node.Member.Name);
}
_projections.Add(Tuple.Create(column, (object)column.ColumnName, ExpressionType.Assign));
return(node);
}
public override string GetCql()
{
var visitor = new CqlExpressionVisitor();
visitor.Evaluate(Expression);
return(visitor.GetUpdate());
}
public new Task <TEntity> ExecuteAsync()
{
bool withValues = GetTable().GetSession().BinaryProtocolVersion > 1;
var visitor = new CqlExpressionVisitor();
visitor.Evaluate(Expression);
object[] values;
string cql = visitor.GetCount(out values, withValues);
var adaptation =
InternalExecuteAsync(cql, values).ContinueWith((t) =>
{
var rs = t.Result;
var result = default(TEntity);
var row = rs.FirstOrDefault();
if (row != null)
{
result = (TEntity)row[0];
}
return(result);
}, TaskContinuationOptions.ExecuteSynchronously);
return(adaptation);
}
protected override string GetCql(out object[] values)
{
var visitor = new CqlExpressionVisitor(PocoData, Table.Name, Table.KeyspaceName);
visitor.Evaluate(Expression);
return(visitor.GetSelect(out values));
}
protected internal override string GetCql(out object[] values)
{
var visitor = new CqlExpressionVisitor(PocoData, Table.Name, Table.KeyspaceName);
visitor.Evaluate(Expression);
return(visitor.GetDelete(out values, _timestamp, _ifExists));
}
protected override string GetCql()
{
var visitor = new CqlExpressionVisitor();
visitor.Evaluate(Expression);
return(visitor.GetUpdate(_ttl, _timestamp));
}
protected override string CqlString()
{
var visitor = new CqlExpressionVisitor();
visitor.Evaluate(Expression);
return(visitor.GetSelect());
}
protected override string GetCql(out object[] values)
{
var visitor = new CqlExpressionVisitor();
visitor.Evaluate(Expression);
return(visitor.GetSelect(out values));
}
public override string ToString()
{
var visitor = new CqlExpressionVisitor();
visitor.Evaluate(Expression);
object[] _;
return visitor.GetDelete(out _, _timestamp, _ifExists, false);
}
protected override Expression VisitBinary(BinaryExpression node)
{
if (_parsePhase.Get() == ParsePhase.Condition)
{
if (node.NodeType == ExpressionType.AndAlso)
{
// It's the AND of the WHERE/IF clause
Visit(node.Left);
// Add the new condition for the right portion
_conditions.Add(new BinaryConditionItem());
Visit(node.Right);
return(node);
}
var condition = _conditions.Last();
if (BinaryConditionItem.IsSupported(node.NodeType))
{
if (node.NodeType == ExpressionType.Equal && IsBoolMember(node.Left))
{
// Handle x.prop == boolValue explicitly
FillBooleanCondition((MemberExpression)node.Left, condition);
Visit(node.Right);
return(node);
}
if (node.NodeType == ExpressionType.Equal && IsBoolMember(node.Right))
{
// Handle boolValue == x.prop explicitly
FillBooleanCondition((MemberExpression)node.Right, condition);
Visit(node.Left);
return(node);
}
Visit(CqlExpressionVisitor.DropNullableConversion(node.Left));
condition.SetOperator(node.NodeType);
Visit(CqlExpressionVisitor.DropNullableConversion(node.Right));
return(node);
}
if (!CqlExpressionVisitor.CqlUnsupTags.Contains(node.NodeType))
{
condition.SetParameter(Expression.Lambda(node).Compile().DynamicInvoke());
return(node);
}
}
else if (_parsePhase.Get() == ParsePhase.SelectBinding)
{
var column = _pocoData.GetColumnByMemberName(_currentBindingName.Get());
if (column == null)
{
throw new ArgumentException("Trying to select a column does it excluded in the mappings");
}
AddProjection(node, column);
_selectFields.Add(column.ColumnName);
return(node);
}
throw new CqlLinqNotSupportedException(node, _parsePhase.Get());
}
protected override string GetCql(out object[] values)
{
var withValues = GetTable().GetSession().BinaryProtocolVersion > 1;
var visitor = new CqlExpressionVisitor();
visitor.Evaluate(Expression);
return(visitor.GetDelete(out values, _timestamp, _ifExists, withValues));
}
public override string ToString()
{
var visitor = new CqlExpressionVisitor();
visitor.Evaluate(Expression);
object[] _;
return(visitor.GetSelect(out _, false));
}
public override string ToString()
{
object[] _;
var visitor = new CqlExpressionVisitor();
visitor.Evaluate(Expression);
return(visitor.GetUpdate(out _, _ttl, _timestamp, false));
}
public override string ToString()
{
var visitor = new CqlExpressionVisitor();
visitor.Evaluate(Expression);
object[] _;
return(visitor.GetDelete(out _, _timestamp, _ifExists, false));
}
protected override string GetCql(out object[] values)
{
bool withValues = GetTable().GetSession().BinaryProtocolVersion > 1;
var visitor = new CqlExpressionVisitor();
visitor.Evaluate(Expression);
var type = GetTable().GetEntityType();
return(visitor.GetUpdate(out values, type, _ttl, _timestamp, withValues));
}
/// <summary>
/// Evaluates the Linq query, executes asynchronously the cql statement and adapts the results.
/// </summary>
public Task <IEnumerable <TEntity> > ExecuteAsync()
{
var visitor = new CqlExpressionVisitor(PocoData, Table.Name, Table.KeyspaceName);
visitor.Evaluate(Expression);
object[] values;
var cql = visitor.GetSelect(out values);
return(InternalExecuteAsync(cql, values).Continue(t => AdaptResult(cql, t.Result)));
}
/// <summary>
/// Evaluates the Linq query, executes asynchronously the cql statement and adapts the results.
/// </summary>
public async Task <IEnumerable <TEntity> > ExecuteAsync()
{
var visitor = new CqlExpressionVisitor(PocoData, Table.Name, Table.KeyspaceName);
object[] values;
var cql = visitor.GetSelect(Expression, out values);
var rs = await InternalExecuteAsync(cql, values).ConfigureAwait(false);
return(AdaptResult(cql, rs));
}
protected internal override string GetCql(out object[] values)
{
var getBindValues = _mapperFactory.GetValueCollector <TEntity>("INSERT ALL LINQ");
var parameters = new List <object>(getBindValues(_entity));
var visitor = new CqlExpressionVisitor(PocoData, Table.Name, Table.KeyspaceName);
var cql = visitor.GetInsert(_entity, _ifNotExists, _ttl, _timestamp, parameters);
values = parameters.ToArray();
return(cql);
}
public override IAsyncResult BeginExecute(AsyncCallback callback, object state)
{
bool withValues = GetTable().GetSession().BinaryProtocolVersion > 1;
var visitor = new CqlExpressionVisitor();
visitor.Evaluate(Expression);
object[] values;
string cql = visitor.GetSelect(out values, withValues);
return(InternalBeginExecute(cql, values, visitor.Mappings, visitor.Alter, callback, state));
}
/// <summary>
/// Asynchronously executes the query and returns a task of a page of results
/// </summary>
public async Task <IPage <TEntity> > ExecutePagedAsync()
{
SetAutoPage(false);
var visitor = new CqlExpressionVisitor(PocoData, Table.Name, Table.KeyspaceName);
object[] values;
var cql = visitor.GetSelect(Expression, out values);
var rs = await InternalExecuteAsync(cql, values).ConfigureAwait(false);
var mapper = MapperFactory.GetMapper <TEntity>(cql, rs);
return(new Page <TEntity>(rs.Select(mapper), PagingState, rs.PagingState));
}
protected override Expression VisitUnary(UnaryExpression node)
{
if (_parsePhase.Get() == ParsePhase.Condition)
{
var condition = _conditions.Last();
if (node.NodeType == ExpressionType.Not && node.Operand.NodeType == ExpressionType.MemberAccess)
{
// We are evaluating a boolean expression parameter, the value we are trying to match is false
FillBooleanCondition((MemberExpression)node.Operand, condition, false);
return(node);
}
if (BinaryConditionItem.IsSupported(node.NodeType))
{
condition.SetOperator(node.NodeType);
Visit(CqlExpressionVisitor.DropNullableConversion(node.Operand));
}
else if (node.NodeType == ExpressionType.Convert)
{
Visit(node.Operand);
}
else
{
var val = Expression.Lambda(node).Compile().DynamicInvoke();
condition.SetParameter(val);
}
return(node);
}
if (_parsePhase.Get() == ParsePhase.SelectBinding)
{
if (node.NodeType == ExpressionType.Convert && node.Type.Name == "Nullable`1")
{
// ReSharper disable once AssignNullToNotNullAttribute
return(Visit(node.Operand));
}
var column = _pocoData.GetColumnByMemberName(_currentBindingName.Get());
if (column != null && column.IsCounter)
{
var value = Expression.Lambda(node).Compile().DynamicInvoke();
if (!(value is long || value is int))
{
throw new ArgumentException("Only Int64 and Int32 values are supported as counter increment of decrement values");
}
_projections.Add(Tuple.Create(column, value, ExpressionType.Increment));
_selectFields.Add(column.ColumnName);
return(node);
}
}
throw new CqlLinqNotSupportedException(node, _parsePhase.Get());
}
/// <summary>
/// Asynchronously executes the query with the provided execution profile and returns a task of a page of results
/// </summary>
public async Task <IPage <TEntity> > ExecutePagedAsync(string executionProfile)
{
if (executionProfile == null)
{
throw new ArgumentNullException(nameof(executionProfile));
}
SetAutoPage(false);
var visitor = new CqlExpressionVisitor(PocoData, Table.Name, Table.KeyspaceName);
var cql = visitor.GetSelect(Expression, out object[] values);
var rs = await InternalExecuteWithProfileAsync(executionProfile, cql, values).ConfigureAwait(false);
var mapper = MapperFactory.GetMapper <TEntity>(cql, rs);
return(new Page <TEntity>(rs.Select(mapper), PagingState, rs.PagingState));
}
/// <summary>
/// Evaluates the Linq query, executes asynchronously the cql statement and adapts the results.
/// </summary>
public Task <IEnumerable <TEntity> > ExecuteAsync()
{
var visitor = new CqlExpressionVisitor(PocoData, Table.Name, Table.KeyspaceName);
visitor.Evaluate(Expression);
object[] values;
var cql = visitor.GetSelect(out values);
var adaptation = InternalExecuteAsync(cql, values).Continue(t =>
{
var rs = t.Result;
var mapper = MapperFactory.GetMapper <TEntity>(cql, rs);
return(rs.Select(mapper));
});
return(adaptation);
}
private Expression FillCondition(MemberExpression node)
{
var condition = _conditions.Last();
if (node.Expression == null || node.Expression.NodeType == ExpressionType.MemberAccess)
{
var val = CqlExpressionVisitor.GetClosureValue(node);
condition.SetParameter(val);
return(node);
}
if (node.Expression.NodeType == ExpressionType.Parameter)
{
var column = _pocoData.GetColumnByMemberName(node.Member.Name);
if (column == null)
{
throw new InvalidOperationException($"No mapping defined for member: {node.Member.Name}");
}
condition.SetColumn(column);
if (column.ColumnType == typeof(bool))
{
condition.SetOperator(ExpressionType.Equal);
// We are evaluating a boolean expression parameter, the value we are trying to match is true
condition.SetParameter(true);
}
return(node);
}
if (node.Expression.NodeType == ExpressionType.Constant)
{
var val = CqlExpressionVisitor.GetClosureValue(node);
if (val is CqlToken)
{
var tokenValues = (val as CqlToken).Values;
condition.SetFunctionName("token").AllowMultipleParameters();
foreach (var pk in tokenValues)
{
condition.SetParameter(pk);
}
}
else
{
condition.SetParameter(val);
}
return(node);
}
return(node);
}
private static object GetFieldValue(MemberExpression node)
{
var fieldInfo = (FieldInfo)node.Member;
if (node.Expression is MemberExpression)
{
// The field of a field instance
var instance = CqlExpressionVisitor.GetClosureValue((MemberExpression)node.Expression);
return(fieldInfo.GetValue(instance));
}
if (node.Expression == null)
{
// Static field
return(fieldInfo.GetValue(null));
}
return(fieldInfo.GetValue(((ConstantExpression)node.Expression).Value));
}
private static object GetClosureValue(MemberExpression node)
{
object value;
if (node.Member.MemberType == MemberTypes.Field)
{
value = CqlExpressionVisitor.GetFieldValue(node);
}
else if (node.Member.MemberType == MemberTypes.Property)
{
value = CqlExpressionVisitor.GetPropertyValue(node);
}
else
{
value = Expression.Lambda(node).Compile().DynamicInvoke();
}
return(value);
}
private static object GetPropertyValue(MemberExpression node)
{
var propertyInfo = (PropertyInfo)node.Member;
if (node.Expression == null)
{
return(propertyInfo.GetValue(null));
}
if (node.Expression is MemberExpression)
{
// Field property
var instance = CqlExpressionVisitor.GetClosureValue((MemberExpression)node.Expression);
return(propertyInfo.GetValue(instance, null));
}
// Current instance property
return(propertyInfo.GetValue(((ConstantExpression)node.Expression).Value, null));
}
public void StartsWith_Test()
{
var table = new Table<LinqDecoratedWithStringCkEntity>(null);
var query = table.Where(t => t.pk == "a" && t.ck1.StartsWith("foo") && t.pk == "bar");
var pocoData = MappingConfiguration.Global.MapperFactory.GetPocoData<LinqDecoratedWithStringCkEntity>();
var visitor = new CqlExpressionVisitor(pocoData, "x_ts", null);
visitor.Evaluate(query.Expression);
object[] parameters;
var queryCql = visitor.GetSelect(out parameters);
Assert.That(parameters, Is.EquivalentTo(new[] { "a", "foo", "foo" + Encoding.UTF8.GetString(new byte[] { 0xF4, 0x8F, 0xBF, 0xBF }), "bar" }));
Assert.AreEqual(@"SELECT ""x_pk"", ""x_ck1"", ""x_f1"" FROM ""x_ts"" WHERE ""x_pk"" = ? AND ""x_ck1"" >= ? AND ""x_ck1"" < ? AND ""x_pk"" = ?", queryCql);
}
protected internal override string GetCql(out object[] values)
{
var visitor = new CqlExpressionVisitor(PocoData, Table.Name, Table.KeyspaceName);
visitor.Evaluate(Expression);
return visitor.GetUpdate(out values, _ttl, _timestamp);
}
