public static void CheckCondition(this ICondition conditionItem, Dictionary <string, object> variables)
{
string condition = conditionItem.GetCondition();
if (!resolveSet(condition, variables))
{
throw new UnauthorizedAccessException();
}
}
public override void GenerateMappingCode(CodeGenerationContext ctx, CodeMemberMethod method)
{
Guard.NotNull(_condition, "'Condition' property can't be null in If mapping");
Guard.NotNull(_true, "'True' property can't be null in If mapping");
CodeMemberMethod trueMethod = ctx.Builder.NewElementMappingMethod(ctx, _true);
if (_false != null)
{
CodeMemberMethod falseMethod = ctx.Builder.NewElementMappingMethod(ctx, _false);
method.Statements.Add(new CodeConditionStatement(_condition.GetCondition(ctx, method),
new CodeStatement[] { new CodeSnippetStatement(String.Format("this.{0}();", trueMethod.Name)) },
new CodeStatement[] { new CodeSnippetStatement(String.Format("this.{0}();", falseMethod.Name)) }));
}
else
{
method.Statements.Add(new CodeConditionStatement(_condition.GetCondition(ctx, method),
new CodeStatement[] { new CodeSnippetStatement(String.Format("this.{0}();", trueMethod.Name)) }));
}
}
/// <summary>
/// 添加查询条件
/// </summary>
/// <typeparam name="TEntity">实体类型</typeparam>
/// <param name="query">数据源</param>
/// <param name="condition">查询条件对象</param>
/// <exception cref="ArgumentNullException"></exception>
public static IQueryable <TEntity> Where <TEntity>(this IQueryable <TEntity> query, ICondition <TEntity> condition)
where TEntity : class
{
if (query == null)
{
throw new ArgumentNullException(nameof(query));
}
if (condition == null)
{
throw new ArgumentNullException(nameof(condition));
}
var predicate = condition.GetCondition();
if (predicate == null)
{
return(query);
}
return(query.Where(predicate));
}
public override void GenerateMappingCode(CodeGenerationContext ctx, CodeMemberMethod method)
{
Guard.NotNull(_while, "While property can't be null in Do mapping");
//bool conditionResult = true;
//do
//{
// // code
// conditionResult = (1 > 2);
//} while (condition);
method.Statements.Add(new CodeSnippetStatement("bool conditionResult = true;"));
CodeVariableReferenceExpression conditionResult = new CodeVariableReferenceExpression("conditionResult");
method.Statements.Add(new CodeSnippetStatement("do {"));
base.GenerateMappingCode(ctx, method);
method.Statements.Add(new CodeAssignStatement(conditionResult, _while.GetCondition(ctx, method)));
method.Statements.Add(new CodeSnippetStatement("} while (conditionResult);"));
}
public override void GenerateMappingCode(CodeGenerationContext ctx, CodeMemberMethod method)
{
Guard.NotNull(_condition, "While property can't be null in Do mapping");
//bool conditionResult = condition;
//while(condition)
//{
// // code
// conditionResult = condition;
//}
CodeExpression condition = _condition.GetCondition(ctx, method);
method.Statements.Add(new CodeVariableDeclarationStatement(
typeof(bool), "conditionResult", condition));
CodeVariableReferenceExpression conditionResult = new CodeVariableReferenceExpression("conditionResult");
method.Statements.Add(new CodeSnippetStatement("while (conditionResult) {"));
base.GenerateMappingCode(ctx, method);
method.Statements.Add(new CodeAssignStatement(conditionResult, condition));
method.Statements.Add(new CodeSnippetStatement("}"));
}
/// <summary>
/// 获取查询条件
/// </summary>
/// <returns></returns>
public string GetCondition()
{
return(_condition?.GetCondition());
}
/// <summary>
/// 复制Where子句
/// </summary>
/// <param name="builder">Sql生成器</param>
/// <param name="register">实体别名注册器</param>
/// <param name="parameterManager">参数管理器</param>
public virtual IWhereClause Clone(ISqlBuilder builder, IEntityAliasRegister register, IParameterManager parameterManager)
{
return(new WhereClause(builder, _dialect, _resolver, register, parameterManager, new SqlCondition(_condition?.GetCondition())));
}
/// <summary>
/// 初始化一个<see cref="OrCondition"/>类型的实例
/// </summary>
/// <param name="left">左操作数</param>
/// <param name="right">右操作数</param>
public OrCondition(ICondition left, ICondition right)
{
_left = left?.GetCondition();
_right = right?.GetCondition();
}
/// <summary>
/// 复制Where子句
/// </summary>
public IWhereClause Clone()
{
return(new WhereClause(_dialect, _resolver, _register, _parameterManager, new SqlCondition(_condition?.GetCondition())));
}