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Merged
merged 1 commit into from
Jan 12, 2016
Merged

Never clone Group objects #47

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22 changes: 6 additions & 16 deletions src/Group.js
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Original file line number Diff line number Diff line change
Expand Up @@ -29,9 +29,6 @@ var SELF = wb.datamodel.Group = function WbDataModelGroup(
if( !$.isFunction( GroupableCollectionConstructor ) ) {
throw new Error( 'Item container constructor needs to be a Function' );
}
if( !( ( new GroupableCollectionConstructor() ) instanceof wb.datamodel.GroupableCollection ) ) {
throw new Error( 'Item container constructor needs to implement GroupableCollection' );
}
if( !$.isFunction(
GroupableCollectionConstructor.prototype[groupableCollectionGetKeysFunctionName]
) ) {
Expand All @@ -40,7 +37,6 @@ var SELF = wb.datamodel.Group = function WbDataModelGroup(
}

this._key = key;
this._GroupableCollectionConstructor = GroupableCollectionConstructor;
this._groupableCollectionGetKeysFunctionName = groupableCollectionGetKeysFunctionName;
this.setItemContainer( groupableCollection || new GroupableCollectionConstructor() );
};
Expand All @@ -52,12 +48,6 @@ $.extend( SELF.prototype, {
*/
_key: null,

/**
* @property {Function}
* @private
*/
_GroupableCollectionConstructor: null,

/**
* @property {string}
* @private
Expand All @@ -81,8 +71,7 @@ $.extend( SELF.prototype, {
* @return {wikibase.datamodel.GroupableCollection}
*/
getItemContainer: function() {
// Do not allow altering the encapsulated container.
return new this._GroupableCollectionConstructor( this._groupableCollection.toArray() );
return this._groupableCollection;
},

/**
Expand All @@ -92,6 +81,10 @@ $.extend( SELF.prototype, {
* match the key registered with the Group instance.
*/
setItemContainer: function( groupableCollection ) {
if( !( groupableCollection instanceof wb.datamodel.GroupableCollection ) ) {
throw new Error( 'groupableCollection must be a GroupableCollection' );
}

var keys = this._getItemContainerKeys( groupableCollection );

for( var i = 0; i < keys.length; i++ ) {
Expand All @@ -101,10 +94,7 @@ $.extend( SELF.prototype, {
}
}

// Clone the container to prevent manipulation of the items using the original container.
this._groupableCollection = new this._GroupableCollectionConstructor(
groupableCollection.toArray()
);
this._groupableCollection = groupableCollection;
},

/**
Expand Down
7 changes: 4 additions & 3 deletions tests/Group.tests.js
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Original file line number Diff line number Diff line change
Expand Up @@ -176,9 +176,10 @@ QUnit.test( 'setItemContainer() & getItemContainer()', function( assert ) {
group = createGroup( 'key', container ),
newContainer = getTestContainer( 'key', 3 );

assert.ok(
group.getItemContainer() !== container,
'Not returning original container.'
assert.strictEqual(
container,
group.getItemContainer(),
'getItemContainer() does not clone.'
);

assert.ok(
Expand Down