/// <summary>
/// Applies a specified sort order to an <see cref="IQueryable[]"/>.
/// </summary>
/// <typeparam name="TSource">The type of the element in the <see cref="IQueryable[]"/>.</typeparam>
/// <param name="instance">The instance of <see cref="IQueryable[]"/> to be extended.</param>
/// <param name="property">The name of the property to be the order by key.</param>
/// <param name="sortOrder">The type of sort order to apply to the <see cref="IQueryable[]"/></param>
/// <returns>A sorted <see cref="IOrderedQueryable[]"/></returns>
public static IOrderedQueryable <TSource> ApplyOrder <TSource>(this IQueryable <TSource> instance, string property, QuerySortOrder sortOrder)
{
string[] props = property.Split('.');
Type type = typeof(TSource);
ParameterExpression arg = Expression.Parameter(type, "x");
Expression expr = arg;
foreach (string prop in props)
{
// use reflection (not ComponentModel) to mirror LINQ
PropertyInfo pi = type.GetProperty(prop);
expr = Expression.Property(expr, pi);
type = pi.PropertyType;
}
Type delegateType = typeof(Func <,>).MakeGenericType(typeof(TSource), type);
LambdaExpression lambda = Expression.Lambda(delegateType, expr, arg);
object result = typeof(Queryable).GetMethods().Single(
method => method.Name == sortOrder.ToString() &&
method.IsGenericMethodDefinition &&
method.GetGenericArguments().Length == 2 &&
method.GetParameters().Length == 2)
.MakeGenericMethod(typeof(TSource), type)
.Invoke(null, new object[] { instance, lambda });
return((IOrderedQueryable <TSource>)result);
}
public Tridion.ContentDelivery.DynamicContent.Query.Query ToTridionQuery()
{
string[] basedOnSchemas = QuerySchemas;
DateTime lastPublishedDate = LastPublishedDate;
IList <MetaQueryItem> metaQueryItems = MetaQueryValues;
QueryLogic metaQueryLogic = MetaQueryLogic;
int maxmimumComponents = MaximumComponents;
Query q = null;
//PublicationCriteria publicationAndLastPublishedDateCriteria = new PublicationCriteria(PublicationId);
PublicationCriteria publicationAndLastPublishedDateCriteria = new PublicationCriteria(PublicationId);
//format DateTime // 00:00:00.000
ItemLastPublishedDateCriteria dateLastPublished = new ItemLastPublishedDateCriteria(lastPublishedDate.ToString("yyyy-MM-dd HH:mm:ss.fff"), Criteria.GreaterThanOrEqual);
//publicationAndLastPublishedDateCriteria.AddCriteria(dateLastPublished);
Criteria basedOnSchemaAndInPublication;
if (basedOnSchemas.Length > 0)
{
Criteria[] schemaCriterias = new Criteria[basedOnSchemas.Length];
int i = 0;
foreach (var schema in basedOnSchemas)
{
TcmUri schemaUri = new TcmUri(schema);
schemaCriterias.SetValue(new ItemSchemaCriteria(schemaUri.ItemId), i);
i++;
}
Criteria basedOnSchema = CriteriaFactory.Or(schemaCriterias);
basedOnSchemaAndInPublication = CriteriaFactory.And(publicationAndLastPublishedDateCriteria, basedOnSchema);
}
else
{
basedOnSchemaAndInPublication = publicationAndLastPublishedDateCriteria;
}
// Add filtering for meta data
Criteria schemasAndMetaData;
if (metaQueryItems.Count > 0)
{
Criteria metaQuery;
Criteria[] metaCriterias = new Criteria[metaQueryItems.Count];
int metaCount = 0;
foreach (MetaQueryItem queryItem in metaQueryItems)
{
CustomMetaKeyCriteria metaField = new CustomMetaKeyCriteria(queryItem.MetaField);
CustomMetaValueCriteria metaCriteria;
FieldOperator metaOperator = typeof(Criteria).GetField(queryItem.MetaOperator.ToString()).GetValue(null) as FieldOperator;
switch (queryItem.MetaValue.GetType().Name)
{
case "DateTime":
DateTime tempDate = (DateTime)queryItem.MetaValue;
metaCriteria = new CustomMetaValueCriteria(metaField, tempDate.ToString("yyyy-MM-dd HH:mm:ss.fff"), "yyyy-MM-dd HH:mm:ss.SSS", metaOperator);
break;
case "Float":
metaCriteria = new CustomMetaValueCriteria(metaField, (float)queryItem.MetaValue, metaOperator);
break;
case "String":
metaCriteria = new CustomMetaValueCriteria(metaField, queryItem.MetaValue as string, metaOperator);
break;
default:
throw new System.Exception("Unexpected query item data type; " + queryItem.MetaValue.GetType().Name);
}
metaCriterias.SetValue(metaCriteria, metaCount);
metaCount++;
}
if (MetaQueryLogic == QueryLogic.AllCriteriaMatch)
{
metaQuery = CriteriaFactory.And(metaCriterias);
}
else
{
metaQuery = CriteriaFactory.Or(metaCriterias);
}
schemasAndMetaData = CriteriaFactory.And(basedOnSchemaAndInPublication, metaQuery);
}
else
{
schemasAndMetaData = basedOnSchemaAndInPublication;
}
Criteria allConditions;
if (KeywordValues.Count > 0)
{
Criteria[] keywordCriterias = new Criteria[KeywordValues.Count];
int keywordCount = 0;
foreach (KeywordItem keyCriteria in KeywordValues)
{
TaxonomyKeywordCriteria keywordField = new TaxonomyKeywordCriteria(keyCriteria.CategoryUri, keyCriteria.KeywordUri, false);
keywordCriterias.SetValue(keywordField, keywordCount);
keywordCount++;
}
Criteria keyQuery;
if (KeywordQueryLogic == QueryLogic.AllCriteriaMatch)
{
keyQuery = CriteriaFactory.And(keywordCriterias);
}
else
{
keyQuery = CriteriaFactory.Or(keywordCriterias);
}
allConditions = CriteriaFactory.And(schemasAndMetaData, keyQuery);
}
else
{
allConditions = schemasAndMetaData;
}
q = new Query(allConditions);
if (maxmimumComponents != 0 && maxmimumComponents != int.MaxValue)
{
LimitFilter limitResults = new LimitFilter(maxmimumComponents);
q.SetResultFilter(limitResults);
}
// Sort column should either be a standard or custom metaData field
SortColumn paramSort;
if (typeof(SortParameter).GetField(QuerySortField) != null)
{
paramSort = typeof(SortParameter).GetField(QuerySortField).GetValue(null) as SortColumn;
}
else
{
// Why do we need to tell Tridion what data type the field is! Its in the database already!
/* FIX: Does not work (null pointer exception): var sType = typeof(MetadataType).GetField(SortType.ToString()).GetValue(null) as MetadataType;*/
paramSort = new CustomMetaKeyColumn(QuerySortField, SortType);
}
SortDirection paramSortDirection = typeof(SortParameter).GetField(QuerySortOrder.ToString()).GetValue(null) as SortDirection;
SortParameter sortParameter = new SortParameter(paramSort, paramSortDirection);
q.AddSorting(sortParameter);
return(q);
}
