helpers/Convert-SPClientIncludeExpression.ps1
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#Requires -Version 3.0 # Convert-SPClientIncludeExpression.ps1 # # Copyright (c) 2017 karamem0 # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in all # copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE # SOFTWARE. function Convert-SPClientIncludeExpression { [CmdletBinding()] param ( [Parameter(Mandatory = $true)] [string] $InputString, [Parameter(Mandatory = $true)] [System.Linq.Expressions.Expression] $Expression ) process { if (-not $InputString.StartsWith('Include(')) { throw "Cannot convert expression because 'InputString' parameter does not start with 'Include( '." } if (-not $InputString.EndsWith(')')) { throw "Cannot convert expression because 'InputString' parameter does not end with ')'." } $InputString = $InputString.Substring(8, $InputString.Length - 9) $itemType = $Expression.Type.BaseType.GenericTypeArguments[0] $funcType = [type]'System.Func`2' | ForEach-Object { $_.MakeGenericType($itemType, [object]) } $exprType = [type]'System.Linq.Expressions.Expression`1' | ForEach-Object { $_.MakeGenericType($funcType) } $paramExpr = [System.Linq.Expressions.Expression]::Parameter($itemType, $itemType.Name) $lambdaExprArray = Split-SPClientExpressionString -InputString $InputString -Separator ',' | ForEach-Object { $propExpr = Convert-SPClientMemberAccessExpression -InputString $_ -Expression $paramExpr $castExpr = [System.Linq.Expressions.Expression]::Convert($propExpr, [object]) $lambdaExpr = [System.Linq.Expressions.Expression]::Lambda($funcType, $castExpr, $paramExpr) Write-Output $lambdaExpr } $arrayExpr = [System.Linq.Expressions.Expression]::NewArrayInit($exprType, [System.Linq.Expressions.Expression[]]$lambdaExprArray) $includeExpr = [System.Linq.Expressions.Expression]::Call( ` [Microsoft.SharePoint.Client.ClientObjectQueryableExtension].GetMethod('Include').MakeGenericMethod($itemType), ` [System.Linq.Expressions.Expression[]]@($Expression, $arrayExpr) ) Write-Output $includeExpr } } |