/// <summary>
/// Query the freedb server to see if there is information on this cd
/// </summary>
/// <param name="querystring"></param>
/// <param name="queryResult"></param>
/// <param name="queryResultsColl"></param>
/// <returns></returns>
public string Query(string querystring, out QueryResult queryResult, out QueryResultCollection queryResultsColl)
{
queryResult = null;
queryResultsColl = null;
StringCollection coll = null;
StringBuilder builder = new StringBuilder(FreeDBHelper.Commands.CMD_QUERY);
builder.Append("+");
builder.Append(querystring);
//make call
try
{
coll = Call(builder.ToString());
}
catch (Exception ex)
{
string msg = "Unable to perform cddb query.";
Exception newex = new Exception(msg, ex);
throw newex;
}
// check if results came back
if (coll.Count < 0)
{
string msg = "No results returned from cddb query.";
Exception ex = new Exception(msg, null);
throw ex;
}
string code = GetCode(coll[0]);
if (code == ResponseCodes.CODE_INVALID)
{
string msg = "Unable to process results returned for query: Data returned: " + coll[0];
Exception ex = new Exception(msg, null);
throw ex;
}
switch (code)
{
case ResponseCodes.CODE_500:
return ResponseCodes.CODE_500;
// Multiple results were returned
// Put them into a queryResultCollection object
case ResponseCodes.CODE_211:
case ResponseCodes.CODE_210:
{
queryResultsColl = new QueryResultCollection();
//remove the 210 or 211
coll.RemoveAt(0);
foreach (string line in coll)
{
QueryResult result = new QueryResult(line, true);
queryResultsColl.Add(result);
}
return ResponseCodes.CODE_211;
}
// exact match
case ResponseCodes.CODE_200:
{
queryResult = new QueryResult(coll[0]);
return ResponseCodes.CODE_200;
}
//not found
case ResponseCodes.CODE_202:
return ResponseCodes.CODE_202;
//Database entry is corrupt
case ResponseCodes.CODE_403:
return ResponseCodes.CODE_403;
//no handshake
case ResponseCodes.CODE_409:
return ResponseCodes.CODE_409;
default:
return ResponseCodes.CODE_500;
} // end of switch
}
/// <overloads>
/// Adds a range of elements to the end of the <see cref="QueryResultCollection"/>.
/// </overloads>
/// <summary>
/// Adds the elements of another collection to the end of the <see cref="QueryResultCollection"/>.
/// </summary>
/// <param name="collection">The <see cref="QueryResultCollection"/> whose elements
/// should be added to the end of the current collection.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="collection"/> is a null reference.</exception>
/// <exception cref="NotSupportedException">
/// <para>The <see cref="QueryResultCollection"/> is read-only.</para>
/// <para>-or-</para>
/// <para>The <b>QueryResultCollection</b> has a fixed size.</para>
/// <para>-or-</para>
/// <para>The <b>QueryResultCollection</b> already contains one or more elements
/// in the specified <paramref name="collection"/>, and the <b>QueryResultCollection</b>
/// ensures that all elements are unique.</para></exception>
/// <remarks>Please refer to <see cref="ArrayList.AddRange"/> for details.</remarks>
public virtual void AddRange(QueryResultCollection collection)
{
if (collection == null)
throw new ArgumentNullException("collection");
if (collection.Count == 0) return;
if (this._count + collection.Count > this._array.Length)
EnsureCapacity(this._count + collection.Count);
++this._version;
Array.Copy(collection.InnerArray, 0,
this._array, this._count, collection.Count);
this._count += collection.Count;
}
/// <summary>
/// Creates a shallow copy of the <see cref="QueryResultCollection"/>.
/// </summary>
/// <returns>A shallow copy of the <see cref="QueryResultCollection"/>.</returns>
/// <remarks>Please refer to <see cref="ArrayList.Clone"/> for details.</remarks>
public virtual object Clone()
{
QueryResultCollection collection = new QueryResultCollection(this._count);
Array.Copy(this._array, 0, collection._array, 0, this._count);
collection._count = this._count;
collection._version = this._version;
return collection;
}
public override void AddRange(QueryResultCollection collection)
{
foreach (QueryResult value in collection)
CheckUnique(value);
this._collection.AddRange(collection);
}
/// <summary>
/// Initializes a new instance of the <see cref="QueryResultCollection"/> class
/// that contains elements copied from the specified collection and
/// that has the same initial capacity as the number of elements copied.
/// </summary>
/// <param name="collection">The <see cref="QueryResultCollection"/>
/// whose elements are copied to the new collection.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="collection"/> is a null reference.</exception>
/// <remarks>Please refer to <see cref="ArrayList(ICollection)"/> for details.</remarks>
public QueryResultCollection(QueryResultCollection collection)
{
if (collection == null)
throw new ArgumentNullException("collection");
this._array = new QueryResult[collection.Count];
AddRange(collection);
}
public override void AddRange(QueryResultCollection collection)
{
lock (this._root) this._collection.AddRange(collection);
}
internal UniqueList(QueryResultCollection collection)
:
base(Tag.Default)
{
this._collection = collection;
}
public override void AddRange(QueryResultCollection collection)
{
throw new NotSupportedException(
"Read-only collections cannot be modified.");
}
internal SyncList(QueryResultCollection collection)
:
base(Tag.Default)
{
this._root = collection.SyncRoot;
this._collection = collection;
}
internal ReadOnlyList(QueryResultCollection collection)
:
base(Tag.Default)
{
this._collection = collection;
}
internal Enumerator(QueryResultCollection collection)
{
this._collection = collection;
this._version = collection._version;
this._index = -1;
}
/// <summary>
/// Returns a wrapper for the specified <see cref="QueryResultCollection"/>
/// ensuring that all elements are unique.
/// </summary>
/// <param name="collection">The <see cref="QueryResultCollection"/> to wrap.</param>
/// <returns>
/// A wrapper around <paramref name="collection"/> ensuring that all elements are unique.
/// </returns>
/// <exception cref="ArgumentException">
/// <paramref name="collection"/> contains duplicate elements.</exception>
/// <exception cref="ArgumentNullException">
/// <paramref name="collection"/> is a null reference.</exception>
/// <remarks><para>
/// The <b>Unique</b> wrapper provides a set-like collection by ensuring
/// that all elements in the <see cref="QueryResultCollection"/> are unique.
/// </para><para>
/// <b>Unique</b> raises an <see cref="ArgumentException"/> if the specified
/// <paramref name="collection"/> contains any duplicate elements. The returned
/// wrapper raises a <see cref="NotSupportedException"/> whenever the user attempts
/// to add an element that is already contained in the <b>QueryResultCollection</b>.
/// </para><para>
/// <strong>Note:</strong> The <b>Unique</b> wrapper reflects any changes made
/// to the underlying <paramref name="collection"/>, including the possible
/// creation of duplicate elements. The uniqueness of all elements is therefore
/// no longer assured if the underlying collection is manipulated directly.
/// </para></remarks>
public static QueryResultCollection Unique(QueryResultCollection collection)
{
if (collection == null)
throw new ArgumentNullException("collection");
for (int i = collection.Count - 1; i > 0; i--)
if (collection.IndexOf(collection[i]) < i)
throw new ArgumentException("collection",
"Argument cannot contain duplicate elements.");
return new UniqueList(collection);
}
/// <summary>
/// Returns a synchronized (thread-safe) wrapper
/// for the specified <see cref="QueryResultCollection"/>.
/// </summary>
/// <param name="collection">The <see cref="QueryResultCollection"/> to synchronize.</param>
/// <returns>
/// A synchronized (thread-safe) wrapper around <paramref name="collection"/>.
/// </returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="collection"/> is a null reference.</exception>
/// <remarks>Please refer to <see cref="ArrayList.Synchronized"/> for details.</remarks>
public static QueryResultCollection Synchronized(QueryResultCollection collection)
{
if (collection == null)
throw new ArgumentNullException("collection");
return new SyncList(collection);
}
/// <summary>
/// Returns a read-only wrapper for the specified <see cref="QueryResultCollection"/>.
/// </summary>
/// <param name="collection">The <see cref="QueryResultCollection"/> to wrap.</param>
/// <returns>A read-only wrapper around <paramref name="collection"/>.</returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="collection"/> is a null reference.</exception>
/// <remarks>Please refer to <see cref="ArrayList.ReadOnly"/> for details.</remarks>
public static QueryResultCollection ReadOnly(QueryResultCollection collection)
{
if (collection == null)
throw new ArgumentNullException("collection");
return new ReadOnlyList(collection);
}
