| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| namespace Apache.Ignite.Linq |
| { |
| using System; |
| using System.Diagnostics.CodeAnalysis; |
| using System.Linq; |
| using System.Linq.Expressions; |
| using Apache.Ignite.Core.Cache; |
| using Apache.Ignite.Core.Cache.Configuration; |
| using Apache.Ignite.Core.Cache.Query; |
| using Apache.Ignite.Core.Impl.Cache; |
| using Apache.Ignite.Core.Impl.Common; |
| using Apache.Ignite.Linq.Impl; |
| using Apache.Ignite.Linq.Impl.Dml; |
| |
| /// <summary> |
| /// Extensions methods for <see cref="ICache{TK,TV}"/>. |
| /// </summary> |
| public static class CacheLinqExtensions |
| { |
| /// <summary> |
| /// Gets an <see cref="IQueryable{T}"/> instance over this cache. |
| /// <para /> |
| /// Resulting query will be translated to cache SQL query and executed over the cache instance |
| /// via <see cref="ICache{TK,TV}.Query(SqlFieldsQuery)"/>. |
| /// <para /> |
| /// Result of this method (and subsequent query) can be cast to <see cref="ICacheQueryable"/> |
| /// for introspection, or converted with <see cref="ToCacheQueryable{T}"/> extension method. |
| /// </summary> |
| /// <typeparam name="TKey">The type of the key.</typeparam> |
| /// <typeparam name="TValue">The type of the value.</typeparam> |
| /// <param name="cache">The cache.</param> |
| /// <returns><see cref="IQueryable{T}"/> instance over this cache.</returns> |
| public static IQueryable<ICacheEntry<TKey, TValue>> AsCacheQueryable<TKey, TValue>( |
| this ICache<TKey, TValue> cache) |
| { |
| IgniteArgumentCheck.NotNull(cache, "cache"); |
| |
| return cache.AsCacheQueryable(false, null); |
| } |
| |
| /// <summary> |
| /// Gets an <see cref="IQueryable{T}"/> instance over this cache. |
| /// <para /> |
| /// Resulting query will be translated to cache SQL query and executed over the cache instance |
| /// via <see cref="ICache{TK,TV}.Query(SqlFieldsQuery)"/>. |
| /// depending on requested result. |
| /// <para /> |
| /// Result of this method (and subsequent query) can be cast to <see cref="ICacheQueryable"/> for introspection. |
| /// </summary> |
| /// <typeparam name="TKey">The type of the key.</typeparam> |
| /// <typeparam name="TValue">The type of the value.</typeparam> |
| /// <param name="cache">The cache.</param> |
| /// <param name="local">Local flag. When set query will be executed only on local node, so only local |
| /// entries will be returned as query result.</param> |
| /// <returns><see cref="IQueryable{T}"/> instance over this cache.</returns> |
| public static IQueryable<ICacheEntry<TKey, TValue>> AsCacheQueryable<TKey, TValue>( |
| this ICache<TKey, TValue> cache, bool local) |
| { |
| IgniteArgumentCheck.NotNull(cache, "cache"); |
| |
| return cache.AsCacheQueryable(local, null); |
| } |
| |
| /// <summary> |
| /// Gets an <see cref="IQueryable{T}" /> instance over this cache. |
| /// <para /> |
| /// Resulting query will be translated to cache SQL query and executed over the cache instance |
| /// via <see cref="ICache{TK,TV}.Query(SqlFieldsQuery)"/>. |
| /// depending on requested result. |
| /// <para /> |
| /// Result of this method (and subsequent query) can be cast to <see cref="ICacheQueryable" /> for introspection. |
| /// </summary> |
| /// <typeparam name="TKey">The type of the key.</typeparam> |
| /// <typeparam name="TValue">The type of the value.</typeparam> |
| /// <param name="cache">The cache.</param> |
| /// <param name="local">Local flag. When set query will be executed only on local node, so only local |
| /// entries will be returned as query result.</param> |
| /// <param name="tableName"> |
| /// Name of the table. |
| /// <para /> |
| /// Table name is equal to short class name of a cache value. |
| /// When a cache has only one type of values, or only one <see cref="QueryEntity"/> defined, |
| /// table name will be inferred and can be omitted. |
| /// </param> |
| /// <returns><see cref="IQueryable{T}" /> instance over this cache.</returns> |
| public static IQueryable<ICacheEntry<TKey, TValue>> AsCacheQueryable<TKey, TValue>( |
| this ICache<TKey, TValue> cache, bool local, string tableName) |
| { |
| IgniteArgumentCheck.NotNull(cache, "cache"); |
| |
| return cache.AsCacheQueryable(new QueryOptions {Local = local, TableName = tableName}); |
| } |
| |
| /// <summary> |
| /// Gets an <see cref="IQueryable{T}" /> instance over this cache. |
| /// <para /> |
| /// Resulting query will be translated to cache SQL query and executed over the cache instance |
| /// via <see cref="ICache{TK,TV}.Query(SqlFieldsQuery)"/>. |
| /// depending on requested result. |
| /// <para /> |
| /// Result of this method (and subsequent query) can be cast to <see cref="ICacheQueryable" /> for introspection. |
| /// </summary> |
| /// <typeparam name="TKey">The type of the key.</typeparam> |
| /// <typeparam name="TValue">The type of the value.</typeparam> |
| /// <param name="cache">The cache.</param> |
| /// <param name="queryOptions">The query options.</param> |
| /// <returns> |
| /// <see cref="IQueryable{T}" /> instance over this cache. |
| /// </returns> |
| [SuppressMessage("Microsoft.Design", "CA1062:Validate arguments of public methods", Justification = "False positive")] |
| public static IQueryable<ICacheEntry<TKey, TValue>> AsCacheQueryable<TKey, TValue>( |
| this ICache<TKey, TValue> cache, QueryOptions queryOptions) |
| { |
| IgniteArgumentCheck.NotNull(cache, "cache"); |
| IgniteArgumentCheck.NotNull(queryOptions, "queryOptions"); |
| |
| var cacheInternal = cache as ICacheInternal; |
| |
| if (cacheInternal == null) |
| { |
| throw new NotSupportedException("Unsupported ICache implementation: " + cache.GetType()); |
| } |
| |
| return new CacheQueryable<TKey, TValue>(cacheInternal, queryOptions, cache.Ignite); |
| } |
| |
| /// <summary> |
| /// Casts this query to <see cref="ICacheQueryable"/>. |
| /// </summary> |
| public static ICacheQueryable ToCacheQueryable<T>(this IQueryable<T> query) |
| { |
| IgniteArgumentCheck.NotNull(query, "query"); |
| |
| return (ICacheQueryable) query; |
| } |
| |
| /// <summary> |
| /// Removes all rows that are matched by the specified query. |
| /// <para /> |
| /// This method results in "DELETE FROM" distributed SQL query, performing bulk delete |
| /// (as opposed to fetching all rows locally). |
| /// </summary> |
| /// <typeparam name="TKey">Key type.</typeparam> |
| /// <typeparam name="TValue">Value type.</typeparam> |
| /// <param name="query">The query.</param> |
| /// <returns>Affected row count.</returns> |
| [SuppressMessage("Microsoft.Design", "CA1062:Validate arguments of public methods", |
| Justification = "Validation is present.")] |
| public static int RemoveAll<TKey, TValue>(this IQueryable<ICacheEntry<TKey, TValue>> query) |
| { |
| IgniteArgumentCheck.NotNull(query, "query"); |
| |
| var method = RemoveAllExpressionNode.RemoveAllMethodInfo.MakeGenericMethod(typeof(TKey), typeof(TValue)); |
| |
| return query.Provider.Execute<int>(Expression.Call(null, method, query.Expression)); |
| } |
| |
| /// <summary> |
| /// Deletes all rows that are matched by the specified query. |
| /// <para /> |
| /// This method results in "DELETE FROM" distributed SQL query, performing bulk delete |
| /// (as opposed to fetching all rows locally). |
| /// </summary> |
| /// <typeparam name="TKey">Key type.</typeparam> |
| /// <typeparam name="TValue">Value type.</typeparam> |
| /// <param name="query">The query.</param> |
| /// <param name="predicate">The predicate.</param> |
| /// <returns> |
| /// Affected row count. |
| /// </returns> |
| [SuppressMessage("Microsoft.Design", "CA1011:ConsiderPassingBaseTypesAsParameters", |
| Justification = "Only specified type of predicate is valid.")] |
| [SuppressMessage("Microsoft.Design", "CA1062:Validate arguments of public methods", |
| Justification = "Validation is present.")] |
| public static int RemoveAll<TKey, TValue>(this IQueryable<ICacheEntry<TKey, TValue>> query, |
| Expression<Func<ICacheEntry<TKey, TValue>, bool>> predicate) |
| { |
| IgniteArgumentCheck.NotNull(query, "query"); |
| IgniteArgumentCheck.NotNull(predicate, "predicate"); |
| |
| var method = RemoveAllExpressionNode.RemoveAllPredicateMethodInfo |
| .MakeGenericMethod(typeof(TKey), typeof(TValue)); |
| |
| return query.Provider.Execute<int>(Expression.Call(null, method, query.Expression, |
| Expression.Quote(predicate))); |
| } |
| |
| /// <summary> |
| /// Updates all rows that are matched by the specified query. |
| /// <para /> |
| /// This method results in "UPDATE" distributed SQL query, performing bulk update |
| /// (as opposed to fetching all rows locally). |
| /// </summary> |
| /// <typeparam name="TKey">Key type.</typeparam> |
| /// <typeparam name="TValue">Value type.</typeparam> |
| /// <param name="query">The query.</param> |
| /// <param name="updateDescription">The update description.</param> |
| /// <returns>Affected row count.</returns> |
| [SuppressMessage("Microsoft.Design", "CA1062:Validate arguments of public methods", Justification = "False positive")] |
| public static int UpdateAll<TKey, TValue>(this IQueryable<ICacheEntry<TKey, TValue>> query, |
| Expression<Func<IUpdateDescriptor<TKey,TValue>, IUpdateDescriptor<TKey,TValue>>> updateDescription) |
| { |
| IgniteArgumentCheck.NotNull(query, "query"); |
| IgniteArgumentCheck.NotNull(updateDescription, "updateDescription"); |
| |
| var method = UpdateAllExpressionNode.UpdateAllMethodInfo |
| .MakeGenericMethod(typeof(TKey), typeof(TValue)); // TODO: cache? |
| |
| return query.Provider.Execute<int>(Expression.Call(null, method, new[] |
| { |
| query.Expression, |
| Expression.Quote(updateDescription) |
| })); |
| } |
| |
| } |
| } |