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For alternate key Protocol, Please refer to: OData/vocabularies#9
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133 changes: 133 additions & 0 deletions
133
src/Microsoft.OData.Core/UriParser/Metadata/AlternateKeysODataUriResolver.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,133 @@ | ||
| //--------------------------------------------------------------------- | ||
| // <copyright file="AlternateKeysODataUriResolver.cs" company="Microsoft"> | ||
| // Copyright (C) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information. | ||
| // </copyright> | ||
| //--------------------------------------------------------------------- | ||
|
|
||
| namespace Microsoft.OData.Core.UriParser.Metadata | ||
| { | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using Microsoft.OData.Edm; | ||
|
|
||
| /// <summary> | ||
| /// Implementation for resolving the alternate keys. | ||
| /// </summary> | ||
| public sealed class AlternateKeysODataUriResolver : ODataUriResolver | ||
| { | ||
| /// <summary> | ||
| /// Model to be used for resolving the alternate keys. | ||
| /// </summary> | ||
| private readonly IEdmModel model; | ||
|
|
||
| /// <summary> | ||
| /// Constructs a AlternateKeysODataUriResolver with the given edmModel to be used for resolving alternate keys | ||
| /// </summary> | ||
| /// <param name="model">The model to be used.</param> | ||
| public AlternateKeysODataUriResolver(IEdmModel model) | ||
| { | ||
| this.model = model; | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// Resolve keys for certain entity set, this function would be called when key is specified as name value pairs. E.g. EntitySet(ID='key') | ||
| /// </summary> | ||
| /// <param name="type">Type for current entityset.</param> | ||
| /// <param name="namedValues">The dictionary of name value pairs.</param> | ||
| /// <param name="convertFunc">The convert function to be used for value converting.</param> | ||
| /// <returns>The resolved key list.</returns> | ||
| public override IEnumerable<KeyValuePair<string, object>> ResolveKeys(IEdmEntityType type, IDictionary<string, string> namedValues, Func<IEdmTypeReference, string, object> convertFunc) | ||
| { | ||
| IEnumerable<KeyValuePair<string, object>> convertedPairs; | ||
| try | ||
| { | ||
| convertedPairs = base.ResolveKeys(type, namedValues, convertFunc); | ||
| } | ||
| catch (ODataException) | ||
| { | ||
| if (!TryResolveAlternateKeys(type, namedValues, convertFunc, out convertedPairs)) | ||
| { | ||
| throw; | ||
| } | ||
| } | ||
|
|
||
| return convertedPairs; | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// Try to resolve alternate keys for certain entity type, this function would be called when key is specified as name value pairs. E.g. EntitySet(ID='key') | ||
| /// </summary> | ||
| /// <param name="type">Type for current entityset.</param> | ||
| /// <param name="namedValues">The dictionary of name value pairs.</param> | ||
| /// <param name="convertFunc">The convert function to be used for value converting.</param> | ||
| /// <param name="convertedPairs">The resolved key list.</param> | ||
| /// <returns>True if resolve succeeded.</returns> | ||
| private bool TryResolveAlternateKeys(IEdmEntityType type, IDictionary<string, string> namedValues, Func<IEdmTypeReference, string, object> convertFunc, out IEnumerable<KeyValuePair<string, object>> convertedPairs) | ||
| { | ||
| IEnumerable<IDictionary<string, IEdmProperty>> alternateKeys = type.DeclaredAlternateKeys(model); | ||
| foreach (IDictionary<string, IEdmProperty> keys in alternateKeys) | ||
| { | ||
| if (TryResolveKeys(type, namedValues, keys, convertFunc, out convertedPairs)) | ||
| { | ||
| return true; | ||
| } | ||
| } | ||
|
|
||
| convertedPairs = null; | ||
| return false; | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// Try to resolve keys for certain entity type, this function would be called when key is specified as name value pairs. E.g. EntitySet(ID='key') | ||
| /// </summary> | ||
| /// <param name="type">Type for current entityset.</param> | ||
| /// <param name="namedValues">The dictionary of name value pairs.</param> | ||
| /// <param name="keyProperties">Dictionary of alias to key properties.</param> | ||
| /// <param name="convertFunc">The convert function to be used for value converting.</param> | ||
| /// <param name="convertedPairs">The resolved key list.</param> | ||
| /// <returns>True if resolve succeeded.</returns> | ||
| private bool TryResolveKeys(IEdmEntityType type, IDictionary<string, string> namedValues, IDictionary<string, IEdmProperty> keyProperties, Func<IEdmTypeReference, string, object> convertFunc, out IEnumerable<KeyValuePair<string, object>> convertedPairs) | ||
| { | ||
| Dictionary<string, object> pairs = new Dictionary<string, object>(StringComparer.Ordinal); | ||
|
|
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| foreach (KeyValuePair<string, IEdmProperty> kvp in keyProperties) | ||
| { | ||
| string valueText; | ||
|
|
||
| if (EnableCaseInsensitive) | ||
| { | ||
| var list = namedValues.Keys.Where(key => string.Equals(kvp.Key, key, StringComparison.OrdinalIgnoreCase)).ToList(); | ||
| if (list.Count > 1) | ||
| { | ||
| throw new ODataException(Strings.UriParserMetadata_MultipleMatchingKeysFound(kvp.Key)); | ||
| } | ||
| else if (list.Count == 0) | ||
| { | ||
| convertedPairs = null; | ||
| return false; | ||
| } | ||
|
|
||
| valueText = namedValues[list.Single()]; | ||
| } | ||
| else if (!namedValues.TryGetValue(kvp.Key, out valueText)) | ||
| { | ||
| convertedPairs = null; | ||
| return false; | ||
| } | ||
|
|
||
| object convertedValue = convertFunc(kvp.Value.Type, valueText); | ||
| if (convertedValue == null) | ||
| { | ||
| convertedPairs = null; | ||
| return false; | ||
| } | ||
|
|
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| pairs[kvp.Key] = convertedValue; | ||
| } | ||
|
|
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| convertedPairs = pairs; | ||
| return true; | ||
| } | ||
| } | ||
| } |
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