/// <summary>
/// Returns a CmdletParameterBinderController for the specified command
/// </summary>
/// <param name="command">
/// The cmdlet to bind parameters to.
/// </param>
/// <returns>
/// A new instance of a CmdletParameterBinderController.
/// </returns>
/// <exception cref="ArgumentException">
/// if <paramref name="command"/> is not a Cmdlet.
/// </exception>
internal ParameterBinderController NewParameterBinderController(InternalCommand command)
{
Cmdlet cmdlet = command as Cmdlet;
if (cmdlet == null)
{
throw PSTraceSource.NewArgumentException("command");
}
ParameterBinderBase parameterBinder;
IScriptCommandInfo scriptCommandInfo = CommandInfo as IScriptCommandInfo;
if (scriptCommandInfo != null)
{
parameterBinder = new ScriptParameterBinder(scriptCommandInfo.ScriptBlock, cmdlet.MyInvocation, this._context, cmdlet, CommandScope);
}
else
{
parameterBinder = new ReflectionParameterBinder(cmdlet, cmdlet);
}
_cmdletParameterBinderController = new CmdletParameterBinderController(cmdlet, CommandInfo.CommandMetadata, parameterBinder);
return(_cmdletParameterBinderController);
}
internal override ParameterBinderController NewParameterBinderController(
InternalCommand command)
{
if (!(command is Cmdlet cmdlet))
{
throw CommandProcessor.tracer.NewArgumentException(nameof(command));
}
ParameterBinderBase parameterBinder = !(this.CommandInfo is IScriptCommandInfo commandInfo) ? (ParameterBinderBase) new ReflectionParameterBinder((object)cmdlet, cmdlet) : (ParameterBinderBase) new ScriptParameterBinder(commandInfo.ScriptBlock, cmdlet.MyInvocation, this.context, (InternalCommand)cmdlet);
this.cmdletParameterBinderController = new CmdletParameterBinderController(cmdlet, this.CommandInfo.CommandMetadata, parameterBinder);
return((ParameterBinderController)this.cmdletParameterBinderController);
}
/// <summary>
/// Populates the parameters specified from the pipeline.
/// </summary>
/// <returns>
/// A bool indicating whether read succeeded.
/// </returns>
/// <exception cref="ParameterBindingException">
/// If a parameter fails to bind.
/// or
/// If a mandatory parameter is missing.
/// </exception>
/// <exception cref="PipelineStoppedException">
/// The pipeline was already stopped.
/// </exception>
// 2003/10/07-JonN was public, now internal
internal sealed override bool Read()
{
// (1) If Read() is called for the first time and with pipe closed and
// no object in the input pipe and
// (typically for the first cmdlet in the pipe & during programmatic
// execution of a command), Read() will succeed (return true) for
// only one time (so that the
// (2) If Read() is called with some input objects in the pipeline, it
// processes the input
// object one at a time and adds parameters from the input object
// to the list of parameters. If
// added to the error pipe and Read() will continue to read the
// next object in the pipe.
// (3) Read() will return false if there are no objects in the pipe
// for processing.
// (4) Read() will return true if the parameters are encoded in the
// request - signals ready for execution.
// (5) Read() will refresh the properties that are encoded via pipeline
// parameters in the next
// call to Read() [To their default values, so that the
// next execution of the command will
// not work on previously specified parameter].
// If the flag 'bail in next call' is true, then bail out returning false.
if (_bailInNextCall)
{
return(false);
}
// ProcessRecord() will loop on Command.Read(), and continue calling
// ProcessRecord() until the incoming pipe is empty. We need to
// stop this loop if a downstream cmdlet broke guidelines and
// "swallowed" a PipelineStoppedException.
Command.ThrowIfStopping();
// Prepare the default value parameter list if this is the first call to Read
if (_firstCallToRead)
{
_firstCallToRead = false;
if (!IsPipelineInputExpected())
{
// Cmdlet should operate only with command-line parameters
// Let the command Execute with the specified command line parameters
// And Read should return false in the next call.
_bailInNextCall = true;
return(true);
}
}
// If this cmdlet has any members that could be bound
// from the pipeline, do that now. In fact, we always try and
// do it once anyway because this BindPipelineParameters() does
// the final binding stage in before executing the cmdlet.
bool mandatoryParametersSpecified = false;
while (!mandatoryParametersSpecified)
{
// Retrieve the object from the input pipeline
object inputObject = this.commandRuntime.InputPipe.Retrieve();
if (inputObject == AutomationNull.Value)
{
// no object in the pipeline, stop reading
Command.CurrentPipelineObject = null;
return(false);
}
// If we are reading input for the first command in the pipeline increment PipelineIterationInfo[0], which is the number of items read from the input
if (this.Command.MyInvocation.PipelinePosition == 1)
{
this.Command.MyInvocation.PipelineIterationInfo[0]++;
}
try
{
// Process the input pipeline object
if (!ProcessInputPipelineObject(inputObject))
{
// The input object was not bound to any parameters of the cmdlet.
// Write a non-terminating error and continue with the next input
// object.
WriteInputObjectError(
inputObject,
ParameterBinderStrings.InputObjectNotBound,
"InputObjectNotBound");
continue;
}
}
catch (ParameterBindingException bindingError)
{
// Set the target and write the error
bindingError.ErrorRecord.SetTargetObject(inputObject);
ErrorRecord errorRecord =
new ErrorRecord(
bindingError.ErrorRecord,
bindingError);
this.commandRuntime._WriteErrorSkipAllowCheck(errorRecord);
continue;
}
Collection <MergedCompiledCommandParameter> missingMandatoryParameters;
using (ParameterBinderBase.bindingTracer.TraceScope(
"MANDATORY PARAMETER CHECK on cmdlet [{0}]",
this.CommandInfo.Name))
{
// Check for unbound mandatory parameters but don't prompt
mandatoryParametersSpecified =
this.CmdletParameterBinderController.HandleUnboundMandatoryParameters(out missingMandatoryParameters);
}
if (!mandatoryParametersSpecified)
{
string missingParameters =
CmdletParameterBinderController.BuildMissingParamsString(missingMandatoryParameters);
// Since the input object did not satisfy all mandatory parameters
// for the command, write an ErrorRecord to the error pipe with
// the target as the input object.
WriteInputObjectError(
inputObject,
ParameterBinderStrings.InputObjectMissingMandatory,
"InputObjectMissingMandatory",
missingParameters);
}
}
return(true);
}