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Copy pathAutoQueryDataConditions.cs
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361 lines (315 loc) · 10.2 KB
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using System;
using System.Collections;
using ServiceStack.Text;
namespace ServiceStack
{
public static class ConditionAlias
{
public new const string Equals = "=";
public const string NotEqual = "<>";
public const string LessEqual = "<=";
public const string Less = "<";
public const string Greater = ">";
public const string GreaterEqual = ">=";
public const string StartsWith = "StartsWith";
public const string Contains = "Contains";
public const string EndsWith = "EndsWith";
public const string In = "In";
public const string Between = "Between";
public const string Like = "Like";
public const string False = "false";
}
public class EqualsCondition : QueryCondition
{
public static EqualsCondition Instance = new EqualsCondition();
public override string Alias
{
get { return ConditionAlias.Equals; }
}
public override bool Match(object a, object b)
{
return CompareTo(a, b) == 0;
}
}
public class NotEqualCondition : QueryCondition
{
public override string Alias
{
get { return ConditionAlias.NotEqual; }
}
public override bool Match(object a, object b)
{
return CompareTo(a, b) != 0;
}
}
public class GreaterCondition : QueryCondition
{
public override string Alias
{
get { return ConditionAlias.Greater; }
}
public override bool Match(object a, object b)
{
if (a == null || b == null)
return false;
return CompareTo(a, b) > 0;
}
}
public class GreaterEqualCondition : QueryCondition
{
public static GreaterEqualCondition Instance = new GreaterEqualCondition();
public override string Alias
{
get { return ConditionAlias.GreaterEqual; }
}
public override bool Match(object a, object b)
{
return CompareTo(a, b) >= 0;
}
}
public class LessCondition : QueryCondition
{
public override string Alias
{
get { return ConditionAlias.Less; }
}
public override bool Match(object a, object b)
{
return CompareTo(a, b) < 0;
}
}
public class LessEqualCondition : QueryCondition
{
public static LessEqualCondition Instance = new LessEqualCondition();
public override string Alias
{
get { return ConditionAlias.LessEqual; }
}
public override bool Match(object a, object b)
{
return CompareTo(a, b) <= 0;
}
}
public class CaseInsensitiveEqualCondition : QueryCondition
{
public override string Alias
{
get { return ConditionAlias.Like; }
}
public override bool Match(object a, object b)
{
var aString = CompareTypeUtils.CoerceString(a);
var bString = CompareTypeUtils.CoerceString(b);
return string.Compare(aString, bString, StringComparison.InvariantCultureIgnoreCase) == 0;
}
}
public class InCollectionCondition : QueryCondition, IQueryMultiple
{
public static InCollectionCondition Instance = new InCollectionCondition();
public override string Alias
{
get { return ConditionAlias.In; }
}
public override bool Match(object a, object b)
{
var bValues = b as IEnumerable;
if (bValues == null)
return EqualsCondition.Instance.Match(a, b);
foreach (var item in bValues)
{
if (EqualsCondition.Instance.Match(a, item))
return true;
}
return false;
}
}
public class InBetweenCondition : QueryCondition, IQueryMultiple
{
public override string Alias
{
get { return ConditionAlias.Between; }
}
public override bool Match(object a, object b)
{
var bValues = b as IEnumerable;
if (bValues == null)
throw new ArgumentException("InBetweenCondition must be queried with multiple values");
var bList = bValues.Map(x => x);
if (bList.Count != 2)
throw new ArgumentException("InBetweenCondition expected 2 values, got {0} instead.".Fmt(bList.Count));
return GreaterEqualCondition.Instance.Match(a, bList[0]) &&
LessEqualCondition.Instance.Match(a, bList[1]);
}
}
public class StartsWithCondition : QueryCondition
{
public override string Alias
{
get { return ConditionAlias.StartsWith; }
}
public override bool Match(object a, object b)
{
var aString = CompareTypeUtils.CoerceString(a);
var bString = CompareTypeUtils.CoerceString(b);
if (aString == null || bString == null)
return false;
return aString.StartsWith(bString, StringComparison.InvariantCultureIgnoreCase);
}
}
public class ContainsCondition : QueryCondition
{
public override string Alias
{
get { return ConditionAlias.Contains; }
}
public override bool Match(object a, object b)
{
var aString = CompareTypeUtils.CoerceString(a);
var bString = CompareTypeUtils.CoerceString(b);
if (aString == null || bString == null)
return false;
return aString.IndexOf(bString, StringComparison.InvariantCultureIgnoreCase) >= 0;
}
}
public class EndsWithCondition : QueryCondition
{
public override string Alias
{
get { return ConditionAlias.EndsWith; }
}
public override bool Match(object a, object b)
{
var aString = CompareTypeUtils.CoerceString(a);
var bString = CompareTypeUtils.CoerceString(b);
if (aString == null || bString == null)
return false;
return aString.EndsWith(bString, StringComparison.InvariantCultureIgnoreCase);
}
}
public class AlwaysFalseCondition : QueryCondition
{
public static AlwaysFalseCondition Instance = new AlwaysFalseCondition();
public override string Alias
{
get { return ConditionAlias.False; }
}
public override bool Match(object a, object b)
{
return false;
}
}
public interface IQueryMultiple {}
public abstract class QueryCondition
{
public abstract string Alias { get; }
public QueryTerm Term { get; set; }
public abstract bool Match(object a, object b);
public virtual int CompareTo(object a, object b)
{
return CompareTypeUtils.CompareTo(a, b);
}
}
public static class CompareTypeUtils
{
public static int CompareTo(object a, object b)
{
if (a == null || b == null)
{
return a == null && b == null
? 0
: a == null //NULL is lowest in RDBMS
? 1
: -1;
}
if (a.GetType() == b.GetType())
{
var ac = a as IComparable;
if (ac != null)
return ac.CompareTo(b);
}
var aLong = CoerceLong(a);
if (aLong != null)
{
var bLong = CoerceLong(b);
if (bLong != null)
return aLong.Value.CompareTo(bLong.Value);
}
var aDouble = CoerceDouble(a);
if (aDouble != null)
{
var bDouble = CoerceDouble(b);
if (bDouble != null)
return aDouble.Value.CompareTo(bDouble.Value);
}
var aString = CoerceString(a);
var bString = CoerceString(b);
return string.Compare(aString, bString, StringComparison.Ordinal);
}
public static long? CoerceLong(object o)
{
return (long?)(o.GetType().IsIntegerType()
? Convert.ChangeType(o, TypeCode.Int64)
: null);
}
public static double? CoerceDouble(object o)
{
return (long?)(o.GetType().IsRealNumberType()
? Convert.ChangeType(o, TypeCode.Double)
: null);
}
public static string CoerceString(object o)
{
return TypeSerializer.SerializeToString(o);
}
public static object Add(object a, object b)
{
var aLong = CoerceLong(a);
if (aLong != null)
{
var bLong = CoerceLong(b);
return aLong + bLong ?? aLong;
}
var aDouble = CoerceDouble(a);
if (aDouble != null)
{
var bDouble = CoerceDouble(b);
return aDouble + bDouble ?? aDouble;
}
var aString = CoerceString(a);
var bString = CoerceString(b);
return aString + bString;
}
public static object Min(object a, object b)
{
if (a == null)
return b;
return CompareTo(a, b) > 0 ? b : a;
}
public static object Max(object a, object b)
{
if (a == null)
return b;
return CompareTo(a, b) < 0 ? b : a;
}
public static object Sum(IEnumerable values)
{
object sum = null;
foreach (var value in values)
{
sum = sum == null
? value
: Add(sum, value);
}
return sum;
}
public static object Aggregate(IEnumerable source, Func<object, object, object> fn, object seed = null)
{
var acc = seed;
foreach (var item in source)
{
acc = fn(acc, item);
}
return acc;
}
}
}