public Constant Verify(int opPositin, BaseMetadata[] args)
{
if (args == null)
{
throw new ArgumentException("运算操作符参数为空");
}
if (args.Length != 1)
{
//抛异常
throw new IllegalExpressionException("操作符\"" + THIS_OPERATOR.Token + "\"参数个数不匹配"
, THIS_OPERATOR.Token
, opPositin
);
}
BaseMetadata first = args[0];
if (first == null)
{
throw new NullReferenceException("操作符\"" + THIS_OPERATOR.Token + "\"参数为空");
}
if (DataType.DATATYPE_DOUBLE == first.GetDataType())
{
return(new Constant(DataType.DATATYPE_DOUBLE, 0.0D));
}
else if (DataType.DATATYPE_FLOAT == first.GetDataType())
{
return(new Constant(DataType.DATATYPE_FLOAT, 0F));
}
else if (DataType.DATATYPE_LONG == first.GetDataType())
{
return(new Constant(DataType.DATATYPE_LONG, 0L));
}
else if (DataType.DATATYPE_INT == first.GetDataType())
{
return(new Constant(DataType.DATATYPE_INT, 0));
}
else
{
//抛异常
throw new IllegalExpressionException("操作符\"" + THIS_OPERATOR.Token + "\"参数类型错误"
, THIS_OPERATOR.Token
, opPositin
);
}
}
public Constant Verify(int opPositin, BaseMetadata[] args)
{
if (args == null)
{
throw new ArgumentException("运算操作符参数为空");
}
if (args.Length != 2)
{
//抛异常
throw new IllegalExpressionException("操作符\"" + THIS_OPERATOR.Token + "\"参数个数不匹配"
, THIS_OPERATOR.Token
, opPositin
);
}
BaseMetadata first = args[1];
BaseMetadata second = args[0];
if (first == null || second == null)
{
throw new NullReferenceException("操作符\"" + THIS_OPERATOR.Token + "\"参数为空");
}
if (DataType.DATATYPE_DATE == first.GetDataType() &&
DataType.DATATYPE_DATE == second.GetDataType())
{
//日期类型比较
return(new Constant(DataType.DATATYPE_BOOLEAN, false));
}
else if (DataType.DATATYPE_STRING == first.GetDataType() &&
DataType.DATATYPE_STRING == second.GetDataType())
{
//字窜类型比较
return(new Constant(DataType.DATATYPE_BOOLEAN, false));
}
else if ((DataType.DATATYPE_DOUBLE == first.GetDataType() ||
DataType.DATATYPE_FLOAT == first.GetDataType() ||
DataType.DATATYPE_LONG == first.GetDataType() ||
DataType.DATATYPE_INT == first.GetDataType())
&&
(DataType.DATATYPE_DOUBLE == second.GetDataType() ||
DataType.DATATYPE_FLOAT == second.GetDataType() ||
DataType.DATATYPE_LONG == second.GetDataType() ||
DataType.DATATYPE_INT == second.GetDataType())
)
{
//数值类型比较
return(new Constant(DataType.DATATYPE_BOOLEAN, false));
}
else
{
//LT操作不支持其他类型，抛异常
throw new IllegalExpressionException("操作符\"" + THIS_OPERATOR.Token + "\"参数类型错误");
}
}
public Constant Verify(int opPositin, BaseMetadata[] args)
{
if (args == null)
{
throw new ArgumentException("运算操作符参数为空");
}
if (args.Length != 2)
{
//抛异常
throw new IllegalExpressionException("操作符\"" + THIS_OPERATOR.Token + "\"参数个数不匹配"
, THIS_OPERATOR.Token
, opPositin
);
}
BaseMetadata first = args[1];
BaseMetadata second = args[0];
if (first == null || second == null)
{
throw new NullReferenceException("操作符\"" + THIS_OPERATOR.Token + "\"参数为空");
}
if (DataType.DATATYPE_BOOLEAN == first.GetDataType() &&
DataType.DATATYPE_BOOLEAN == second.GetDataType())
{
return(new Constant(DataType.DATATYPE_BOOLEAN, false));
}
else
{
//抛异常
throw new IllegalExpressionException("操作符\"" + THIS_OPERATOR.Token + "\"参数类型错误"
, THIS_OPERATOR.Token
, opPositin
);
}
}
public Constant Verify(int opPositin, BaseMetadata[] args)
{
if (args == null)
{
throw new ArgumentException("运算操作符参数为空");
}
if (args.Length != 2)
{
//抛异常
throw new IllegalExpressionException("操作符\"" + THIS_OPERATOR.Token + "\"参数个数不匹配"
, THIS_OPERATOR.Token
, opPositin
);
}
BaseMetadata first = args[1];
BaseMetadata second = args[0];
if (first == null || second == null)
{
throw new NullReferenceException("操作符\"" + THIS_OPERATOR.Token + "\"参数为空");
}
//集合类型EQ运算单独处理
if (DataType.DATATYPE_LIST == first.GetDataType() ||
DataType.DATATYPE_LIST == second.GetDataType())
{
//目前不支持集合EQ比较，（太麻烦鸟）.考虑使用后期使用函数实现
throw new IllegalExpressionException("操作符\"" + THIS_OPERATOR.Token + "\"参数类型错误"
, THIS_OPERATOR.Token
, opPositin);
}
if (DataType.DATATYPE_STRING == first.GetDataType() ||
DataType.DATATYPE_STRING == second.GetDataType() ||
DataType.DATATYPE_NULL == first.GetDataType() ||
DataType.DATATYPE_NULL == second.GetDataType() ||
DataType.DATATYPE_BOOLEAN == first.GetDataType() ||
DataType.DATATYPE_BOOLEAN == second.GetDataType() ||
DataType.DATATYPE_DATE == first.GetDataType() ||
DataType.DATATYPE_DATE == second.GetDataType())
{
return(new Constant(DataType.DATATYPE_STRING, null));
}
else if (DataType.DATATYPE_DOUBLE == first.GetDataType() ||
DataType.DATATYPE_DOUBLE == second.GetDataType())
{
return(new Constant(DataType.DATATYPE_DOUBLE, 0.0D));
}
else if (DataType.DATATYPE_FLOAT == first.GetDataType() ||
DataType.DATATYPE_FLOAT == second.GetDataType())
{
return(new Constant(DataType.DATATYPE_FLOAT, 0.0F));
}
else if (DataType.DATATYPE_LONG == first.GetDataType() ||
DataType.DATATYPE_LONG == second.GetDataType())
{
return(new Constant(DataType.DATATYPE_LONG, 0L));
}
else
{
return(new Constant(DataType.DATATYPE_INT, 0));
}
}