PersistenceProviderElement.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / NetFx35 / System.WorkflowServices / System / ServiceModel / Configuration / PersistenceProviderElement.cs / 1305376 / PersistenceProviderElement.cs
                        
                        
                            //------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------
namespace System.ServiceModel.Configuration
{ 
    using System;
    using System.Collections.Specialized; 
    using System.ComponentModel; 
    using System.Configuration;
    using System.Diagnostics.CodeAnalysis; 
    using System.Reflection;
    using System.Runtime;
    using System.ServiceModel.Description;
    using System.ServiceModel.Persistence; 
    using System.Workflow.Runtime;
    using System.Xml; 
 
    public class PersistenceProviderElement : BehaviorExtensionElement
    { 
        const string persistenceOperationTimeoutParameter = "persistenceOperationTimeout";
        const string typeParameter = "type";
        int argumentsHash;
 
        NameValueCollection persistenceProviderArguments;
 
        public PersistenceProviderElement() 
        {
            this.persistenceProviderArguments = new NameValueCollection(); 
            this.argumentsHash = this.ComputeArgumentsHash();
        }

        // This property is not supposed to be exposed in config. 
        [SuppressMessage("Configuration", "Configuration102:ConfigurationPropertyAttributeRule")]
        public override Type BehaviorType 
        { 
            get { return typeof(PersistenceProviderBehavior); }
        } 

        [ConfigurationProperty(
            persistenceOperationTimeoutParameter,
            IsRequired = false, 
            DefaultValue = PersistenceProviderBehavior.DefaultPersistenceOperationTimeoutString)]
        [TypeConverter(typeof(TimeSpanOrInfiniteConverter))] 
        [PositiveTimeSpanValidator] 
        public TimeSpan PersistenceOperationTimeout
        { 
            get { return (TimeSpan) base[persistenceOperationTimeoutParameter]; }
            set { base[persistenceOperationTimeoutParameter] = value; }
        }
 
        [SuppressMessage("Configuration", "Configuration102:ConfigurationPropertyAttributeRule")]
        public NameValueCollection PersistenceProviderArguments 
        { 
            get { return this.persistenceProviderArguments; }
        } 

        [ConfigurationProperty(typeParameter, IsRequired = true)]
        [StringValidator(MinLength = 0)]
        public string Type 
        {
            get { return (string) base[typeParameter]; } 
            set { base[typeParameter] = value; } 
        }
 
        protected internal override object CreateBehavior()
        {
            Fx.Assert(this.PersistenceOperationTimeout > TimeSpan.Zero,
                "This should have been guaranteed by the validator on the setter."); 

            PersistenceProviderFactory providerFactory; 
 
            Type providerType = System.Type.GetType((string) base[typeParameter]);
 
            if (providerType == null)
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
                    new InvalidOperationException(SR2.GetString(SR2.PersistenceProviderTypeNotFound))); 
            }
 
            ConstructorInfo cInfo = providerType.GetConstructor(new Type[] { typeof(NameValueCollection) }); 

            if (cInfo != null) 
            {
                providerFactory = (PersistenceProviderFactory) cInfo.Invoke(new object[] { this.persistenceProviderArguments });
            }
            else 
            {
                cInfo = providerType.GetConstructor(new Type[] { }); 
 
                Fx.Assert(cInfo != null,
                    "The constructor should have been found - this should have been validated elsewhere."); 

                providerFactory = (PersistenceProviderFactory) cInfo.Invoke(null);
            }
 
            return new PersistenceProviderBehavior(providerFactory, this.PersistenceOperationTimeout);
        } 
 
        protected override bool IsModified()
        { 
            return base.IsModified() || this.argumentsHash != this.ComputeArgumentsHash();
        }

        protected override bool OnDeserializeUnrecognizedAttribute(string name, string value) 
        {
            persistenceProviderArguments.Add(name, value); 
 
            return true;
        } 

        protected override void PostDeserialize()
        {
            this.argumentsHash = this.ComputeArgumentsHash(); 
            base.PostDeserialize();
        } 
 
        protected override bool SerializeElement(XmlWriter writer, bool serializeCollectionKey)
        { 
            bool result;

            if (writer != null)
            { 
                foreach (string key in this.persistenceProviderArguments.AllKeys)
                { 
                    writer.WriteAttributeString(key, this.persistenceProviderArguments[key]); 
                }
 
                result = base.SerializeElement(writer, serializeCollectionKey);
                result |= this.persistenceProviderArguments.Count > 0;
                this.argumentsHash = this.ComputeArgumentsHash();
            } 
            else
            { 
                result = base.SerializeElement(writer, serializeCollectionKey); 
            }
 
            return result;
        }

        protected override void Unmerge(ConfigurationElement sourceElement, ConfigurationElement parentElement, ConfigurationSaveMode saveMode) 
        {
            PersistenceProviderElement persistenceProviderElement = (PersistenceProviderElement) sourceElement; 
            this.persistenceProviderArguments = new NameValueCollection(persistenceProviderElement.persistenceProviderArguments); 
            this.argumentsHash = persistenceProviderElement.argumentsHash;
            base.Unmerge(sourceElement, parentElement, saveMode); 
        }

        int ComputeArgumentsHash()
        { 
            int result = 0;
 
            foreach (string key in this.persistenceProviderArguments.AllKeys) 
            {
                result ^= key.GetHashCode() ^ this.persistenceProviderArguments[key].GetHashCode(); 
            }

            return result;
        } 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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PersistenceProviderElement.cs source code in C# .NET

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