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/*
* User: scorder
* Date: 7/8/2009
*
* Updated: 2/1/2010
* User: scottwater
* Minor changes to Document to make it play nicely with
* C# 4.0 dynamics
*/
using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using System.Dynamic;
namespace MongoDB.Driver {
/// <summary>
/// Description of Document.
/// </summary>
public class Document : DynamicObject {
//Changed from deriving from Dictionary<string,object> - SW
private List<String> orderedKeys = new List<String>();
//Moved dictionary to a prviate instance instead of base class - SW
private Dictionary<string, object> Dictionary = new Dictionary<string, object>();
//Dynamic Get Properties - SW
public override bool TryGetMember(GetMemberBinder binder, out object result)
{
if (Dictionary.ContainsKey(binder.Name))
{
result = Dictionary[binder.Name];
return true;
}
return base.TryGetMember(binder, out result);
}
//Dynamic Set Properties - SW
public override bool TrySetMember(SetMemberBinder binder, object value)
{
this[binder.Name] = value;
return true;
}
public Document() {
}
public Object this[String key] {
get {
return Dictionary[key];
}
set {
if (orderedKeys.Contains(key) == false) {
orderedKeys.Add(key);
}
Dictionary[key] = value;
}
}
public ICollection Keys {
get {
return (orderedKeys);
}
}
public ICollection Values {
get {
return (Dictionary.Values);
}
}
public void Add(String key, Object value) {
Dictionary.Add(key, value);
//Relies on ArgumentException from above if key already exists.
orderedKeys.Add(key);
}
public Document Append(String key, Object value) {
this.Add(key, value);
return this;
}
/// <summary>
/// Adds an item to the Document at the specified position
/// </summary>
public void Insert(String key, Object value, int Position){
Dictionary.Add(key, value);
//Relies on ArgumentException from above if key already exists.
orderedKeys.Insert(Position,key);
}
public Document Prepend(String key, Object value) {
this.Insert(key, value,0);
return this;
}
public Document Update(Document from) {
if (from == null) return this;
foreach (String key in from.Keys) {
this[key] = from[key];
}
return this;
}
public bool Contains(String key) {
return (orderedKeys.Contains(key));
}
public void Remove(String key) {
Dictionary.Remove(key);
orderedKeys.Remove(key);
}
/// <summary>
/// TODO Fix any accidental reordering issues.
/// </summary>
/// <param name="dest"></param>
public void CopyTo(Document dest) {
foreach (String key in orderedKeys) {
dest[key] = this[key];
}
}
public override bool Equals(object obj) {
if (obj is Document) {
return Equals(obj as Document);
}
return base.Equals(obj);
}
public bool Equals(Document obj) {
if (obj == null)
return false;
if (orderedKeys.Count != obj.orderedKeys.Count)
return false;
return this.GetHashCode() == obj.GetHashCode();
}
public override int GetHashCode() {
int hash = 27;
foreach (var key in orderedKeys) {
var valueHashCode = GetValueHashCode(this[key]);
unchecked {
hash = (13 * hash) + key.GetHashCode();
hash = (13 * hash) + valueHashCode;
}
}
return hash;
}
private int GetValueHashCode(object value) {
if (value == null) {
return 0;
}
return (value is Array) ? GetArrayHashcode((Array)value) : value.GetHashCode();
}
private int GetArrayHashcode(Array array) {
var hash = 0;
foreach (var value in array) {
var valueHashCode = GetValueHashCode(value);
unchecked {
hash = (13 * hash) + valueHashCode;
}
}
return hash;
}
public override string ToString() {
var json = new StringBuilder();
json.Append("{ ");
bool first = true;
foreach (String key in orderedKeys) {
if (first) {
first = false;
} else {
json.Append(", ");
}
json.AppendFormat(@"""{0}"": ", key);
SerializeType(this[key], json);
}
json.Append(" }");
return json.ToString();
}
private void SerializeType(object value, StringBuilder json) {
if (value == null) {
json.Append("null");
return;
}
var t = value.GetType();
if (value is bool) {
json.Append(((bool)value) ? "true" : "false");
} else if (t.IsArray) {
json.Append("[ ");
bool first = true;
foreach (var v in (Array)value) {
if (first) {
first = false;
} else {
json.Append(", ");
}
SerializeType(v, json);
}
json.Append(" ]");
} else if (value is Document ||
value is Oid ||
value is int ||
value is Int32 ||
value is long ||
value is float ||
value is double) {
json.Append(value);
} else if (value is DateTime) {
json.AppendFormat(@"""{0}""", ((DateTime)value).ToUniversalTime().ToString("o"));
} else {
json.AppendFormat(@"""{0}""", value);
}
return;
}
}
}
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