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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.ServiceModel.Dispatcher
{
using System.Runtime;
using System.Xml.XPath;
public sealed class XPathResult : IDisposable
{
bool boolResult;
SafeNodeSequenceIterator internalIterator;
XPathNodeIterator nodeSetResult;
double numberResult;
XPathResultType resultType;
string stringResult;
internal XPathResult(XPathNodeIterator nodeSetResult)
: this()
{
this.nodeSetResult = nodeSetResult;
this.internalIterator = nodeSetResult as SafeNodeSequenceIterator;
this.resultType = XPathResultType.NodeSet;
}
internal XPathResult(string stringResult) : this()
{
this.stringResult = stringResult;
this.resultType = XPathResultType.String;
}
internal XPathResult(bool boolResult) : this()
{
this.boolResult = boolResult;
this.resultType = XPathResultType.Boolean;
}
internal XPathResult(double numberResult) : this()
{
this.numberResult = numberResult;
this.resultType = XPathResultType.Number;
}
XPathResult()
{
}
public XPathResultType ResultType
{
get
{
return this.resultType;
}
}
public void Dispose()
{
if (this.internalIterator != null)
{
this.internalIterator.Dispose();
}
}
public bool GetResultAsBoolean()
{
switch (this.resultType)
{
case XPathResultType.Boolean:
return this.boolResult;
case XPathResultType.NodeSet:
return QueryValueModel.Boolean(this.nodeSetResult);
case XPathResultType.Number:
return QueryValueModel.Boolean(this.numberResult);
case XPathResultType.String:
return QueryValueModel.Boolean(this.stringResult);
default:
throw Fx.AssertAndThrow("Unexpected result type.");
}
}
public XPathNodeIterator GetResultAsNodeset()
{
if (this.resultType != XPathResultType.NodeSet)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.CannotRepresentResultAsNodeset)));
}
return this.nodeSetResult;
}
public double GetResultAsNumber()
{
switch (this.resultType)
{
case XPathResultType.Boolean:
return QueryValueModel.Double(this.boolResult);
case XPathResultType.NodeSet:
return QueryValueModel.Double(this.nodeSetResult);
case XPathResultType.Number:
return this.numberResult;
case XPathResultType.String:
return QueryValueModel.Double(this.stringResult);
default:
throw Fx.AssertAndThrow("Unexpected result type.");
}
}
public string GetResultAsString()
{
switch (this.resultType)
{
case XPathResultType.Boolean:
return QueryValueModel.String(this.boolResult);
case XPathResultType.NodeSet:
return QueryValueModel.String(this.nodeSetResult);
case XPathResultType.Number:
return QueryValueModel.String(this.numberResult);
case XPathResultType.String:
return this.stringResult;
default:
throw Fx.AssertAndThrow("Unexpected result type.");
}
}
internal XPathResult Copy()
{
XPathResult result = new XPathResult();
result.resultType = this.resultType;
switch (this.resultType)
{
case XPathResultType.Boolean:
result.boolResult = this.boolResult;
break;
case XPathResultType.NodeSet:
result.nodeSetResult = this.nodeSetResult.Clone();
break;
case XPathResultType.Number:
result.numberResult = this.numberResult;
break;
case XPathResultType.String:
result.stringResult = this.stringResult;
break;
default:
throw Fx.AssertAndThrow("Unexpected result type.");
}
return result;
}
}
}
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