133 lines
4.8 KiB
C#
133 lines
4.8 KiB
C#
/********************************************************************++
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Copyright (c) Microsoft Corporation. All rights reserved.
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--********************************************************************/
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using System;
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using System.Collections.Generic;
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using System.Management.Automation;
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using System.Reflection;
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using System.Text;
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namespace Microsoft.PowerShell.Commands
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{
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/// <summary>
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/// The ConvertFrom-Json command
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/// This command convert a Json string representation to a JsonObject
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/// </summary>
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[Cmdlet(VerbsData.ConvertFrom, "Json", HelpUri = "http://go.microsoft.com/fwlink/?LinkID=217031", RemotingCapability = RemotingCapability.None)]
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[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly")]
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public class ConvertFromJsonCommand : Cmdlet
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{
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#region parameters
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/// <summary>
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/// gets or sets the InputString property
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/// </summary>
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[Parameter(Mandatory = true, Position = 0, ValueFromPipeline = true)]
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[AllowEmptyString]
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public string InputObject { get; set; }
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/// <summary>
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/// inputObjectBuffer buffers all InputObjet contents avaliable in the pipeline.
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/// </summary>
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private List<string> inputObjectBuffer = new List<string>();
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#endregion parameters
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#region overrides
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/// <summary>
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/// Prerequisite checks
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/// </summary>
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protected override void BeginProcessing()
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{
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#if CORECLR
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JsonObject.ImportJsonDotNetModule(this);
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#else
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try
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{
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System.Reflection.Assembly.Load(new AssemblyName("System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"));
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}
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catch (System.IO.FileNotFoundException)
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{
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ThrowTerminatingError(new ErrorRecord(
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new NotSupportedException(WebCmdletStrings.ExtendedProfileRequired),
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"ExtendedProfileRequired",
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ErrorCategory.NotInstalled,
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null));
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}
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#endif
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}
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/// <summary>
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/// Buffers InputObjet contents avaliable in the pipeline.
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/// </summary>
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protected override void ProcessRecord()
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{
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inputObjectBuffer.Add(InputObject);
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}
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/// <summary>
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/// the main execution method for the convertfrom-json command
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/// </summary>
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protected override void EndProcessing()
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{
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// When Input is provided through pipeline, the input can be represented in the following two ways:
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// 1. Each input to the buffer is a complete Json content. There can be multiple inputs of this format.
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// 2. The complete buffer input collectively represent a single JSon format. This is typically the majority of the case.
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if (inputObjectBuffer.Count > 0)
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{
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if (inputObjectBuffer.Count == 1)
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{
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ConvertFromJsonHelper(inputObjectBuffer[0]);
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}
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else
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{
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bool successfullyConverted = false;
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try
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{
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successfullyConverted = ConvertFromJsonHelper(inputObjectBuffer[0]);
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}
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catch (ArgumentException)
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{
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// The first input string does not represent a complete Json Syntax.
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// Hence consider the the entire input as a single Json content.
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}
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if (successfullyConverted)
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{
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for (int index = 1; index < inputObjectBuffer.Count; index++)
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{
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ConvertFromJsonHelper(inputObjectBuffer[index]);
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}
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}
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else
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{
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ConvertFromJsonHelper(string.Join(System.Environment.NewLine, inputObjectBuffer.ToArray()));
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}
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}
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}
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}
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/// <summary>
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/// ConvertFromJsonHelper is a helper method to convert to Json input to .Net Type.
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/// </summary>
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/// <param name="input">Input String.</param>
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/// <returns>True if successfully converted, else returns false.</returns>
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private bool ConvertFromJsonHelper(string input)
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{
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ErrorRecord error = null;
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object result = JsonObject.ConvertFromJson(input, out error);
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if (error != null)
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{
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ThrowTerminatingError(error);
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}
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WriteObject(result);
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return (result != null);
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}
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#endregion overrides
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}
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}
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