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[tt-rss.git] / lib / dojo / store / api / Store.js.uncompressed.js

define("dojo/store/api/Store", ["dojo/_base/declare"], function(declare) {
        // module:
        //              dojo/store/api/Store
        // summary:
        //              The module defines the Dojo object store interface.

var Store = declare("dojo.store.api.Store", null, {
        // summary:
        //              This is an abstract API that data provider implementations conform to.
        //              This file defines methods signatures and intentionally leaves all the
        //              methods unimplemented.  For more information on the dojo.store APIs,
        //              please visit: http://dojotoolkit.org/reference-guide/dojo/store.html
        //              Every method and property is optional, and is only needed if the functionality
        //              it provides is required.
        //              Every method may return a promise for the specified return value if the
        //              execution of the operation is asynchronous (except
        //              for query() which already defines an async return value).

        // idProperty: String
        //              If the store has a single primary key, this tndicates the property to use as the
        //              identity property. The values of this property should be unique.
        idProperty: "id",

        // queryEngine: Function
        //              If the store can be queried locally (on the client side in JS), this defines
        //              the query engine to use for querying the data store.
        //              This takes a query and query options and returns a function that can execute
        //              the provided query on a JavaScript array. The queryEngine may be replace to
        //              provide more sophisticated querying capabilities. For example:
        //              | var query = store.queryEngine({foo:"bar"}, {count:10});
        //              | query(someArray) -> filtered array
        //              The returned query function may have a "matches" property that can be
        //              used to determine if an object matches the query. For example:
        //              | query.matches({id:"some-object", foo:"bar"}) -> true
        //              | query.matches({id:"some-object", foo:"something else"}) -> false
        queryEngine: null,

        get: function(id){
                // summary:
                //              Retrieves an object by its identity
                // id: Number
                //              The identity to use to lookup the object
                // returns: Object
                //              The object in the store that matches the given id.
        },
        getIdentity: function(object){
                // summary:
                //              Returns an object's identity
                // object: Object
                //              The object to get the identity from
                // returns: String|Number
        },
        put: function(object, directives){
                // summary:
                //              Stores an object
                // object: Object
                //              The object to store.
                // directives: dojo.store.api.Store.PutDirectives?
                //              Additional directives for storing objects.
                // returns: Number|String
        },
        add: function(object, directives){
                // summary:
                //              Creates an object, throws an error if the object already exists
                // object: Object
                //              The object to store.
                // directives: dojo.store.api.Store.PutDirectives?
                //              Additional directives for creating objects.
                // returns: Number|String
        },
        remove: function(id){
                // summary:
                //              Deletes an object by its identity
                // id: Number
                //              The identity to use to delete the object
                delete this.index[id];
                var data = this.data,
                        idProperty = this.idProperty;
                for(var i = 0, l = data.length; i < l; i++){
                        if(data[i][idProperty] == id){
                                data.splice(i, 1);
                                return;
                        }
                }
        },
        query: function(query, options){
                // summary:
                //              Queries the store for objects. This does not alter the store, but returns a
                //              set of data from the store.
                // query: String|Object|Function
                //              The query to use for retrieving objects from the store.
                // options: dojo.store.api.Store.QueryOptions
                //              The optional arguments to apply to the resultset.
                // returns: dojo.store.api.Store.QueryResults
                //              The results of the query, extended with iterative methods.
                //
                // example:
                //              Given the following store:
                //
                //      ...find all items where "prime" is true:
                //
                //      |       store.query({ prime: true }).forEach(function(object){
                //      |               // handle each object
                //      |       });
        },
        transaction: function(){
                // summary:
                //              Starts a new transaction.
                //              Note that a store user might not call transaction() prior to using put,
                //              delete, etc. in which case these operations effectively could be thought of
                //              as "auto-commit" style actions.
                // returns: dojo.store.api.Store.Transaction
                //              This represents the new current transaction.
        },
        getChildren: function(parent, options){
                // summary:
                //              Retrieves the children of an object.
                // parent: Object
                //              The object to find the children of.
                // options: dojo.store.api.Store.QueryOptions?
                //              Additional options to apply to the retrieval of the children.
                // returns: dojo.store.api.Store.QueryResults
                //              A result set of the children of the parent object.
        },
        getMetadata: function(object){
                // summary:
                //              Returns any metadata about the object. This may include attribution,
                //              cache directives, history, or version information.
                // object: Object
                //              The object to return metadata for.
                // returns: Object
                //              An object containing metadata.
        }
});

Store.PutDirectives = function(id, before, parent, overwrite){
        // summary:
        //              Directives passed to put() and add() handlers for guiding the update and
        //              creation of stored objects.
        // id: String|Number?
        //              Indicates the identity of the object if a new object is created
        // before: Object?
        //              If the collection of objects in the store has a natural ordering,
        //              this indicates that the created or updated object should be placed before the
        //              object specified by the value of this property. A value of null indicates that the
        //              object should be last.
        // parent: Object?,
        //              If the store is hierarchical (with single parenting) this property indicates the
        //              new parent of the created or updated object.
        // overwrite: Boolean?
        //              If this is provided as a boolean it indicates that the object should or should not
        //              overwrite an existing object. A value of true indicates that a new object
        //              should not be created, the operation should update an existing object. A
        //              value of false indicates that an existing object should not be updated, a new
        //              object should be created (which is the same as an add() operation). When
        //              this property is not provided, either an update or creation is acceptable.
        this.id = id;
        this.before = before;
        this.parent = parent;
        this.overwrite = overwrite;
};

Store.SortInformation = function(attribute, descending){
        // summary:
        //              An object describing what attribute to sort on, and the direction of the sort.
        // attribute: String
        //              The name of the attribute to sort on.
        // descending: Boolean
        //              The direction of the sort.  Default is false.
        this.attribute = attribute;
        this.descending = descending;
};

Store.QueryOptions = function(sort, start, count){
        // summary:
        //              Optional object with additional parameters for query results.
        // sort: dojo.store.api.Store.SortInformation[]?
        //              A list of attributes to sort on, as well as direction
        //              For example:
        //              | [{attribute:"price, descending: true}].
        //              If the sort parameter is omitted, then the natural order of the store may be
        //              applied if there is a natural order.
        // start: Number?
        //              The first result to begin iteration on
        // count: Number?
        //              The number of how many results should be returned.
        this.sort = sort;
        this.start = start;
        this.count = count;
};

declare("dojo.store.api.Store.QueryResults", null, {
        // summary:
        //              This is an object returned from query() calls that provides access to the results
        //              of a query. Queries may be executed asynchronously.

        forEach: function(callback, thisObject){
                // summary:
                //              Iterates over the query results, based on
                //              https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Objects/Array/forEach.
                //              Note that this may executed asynchronously. The callback may be called
                //              after this function returns.
                // callback:
                //              Function that is called for each object in the query results
                // thisObject:
                //              The object to use as |this| in the callback.

        },
        filter: function(callback, thisObject){
                // summary:
                //              Filters the query results, based on
                //              https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Objects/Array/filter.
                //              Note that this may executed asynchronously. The callback may be called
                //              after this function returns.
                // callback:
                //              Function that is called for each object in the query results
                // thisObject:
                //              The object to use as |this| in the callback.
                // returns: dojo.store.api.Store.QueryResults
        },
        map: function(callback, thisObject){
                // summary:
                //              Maps the query results, based on
                //              https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Objects/Array/map.
                //              Note that this may executed asynchronously. The callback may be called
                //              after this function returns.
                // callback:
                //              Function that is called for each object in the query results
                // thisObject:
                //              The object to use as |this| in the callback.
                // returns: dojo.store.api.Store.QueryResults
        },
        then: function(callback, errorHandler){
                // summary:
                //              This registers a callback for when the query is complete, if the query is asynchronous.
                //              This is an optional method, and may not be present for synchronous queries.
                // callback:
                //              This is called when the query is completed successfully, and is passed a single argument
                //              that is an array representing the query results.
                // errorHandler:
                //              This is called if the query failed, and is passed a single argument that is the error
                //              for the failure.
        },
        observe: function(listener, includeAllUpdates){
                // summary:
                //              This registers a callback for notification of when data is modified in the query results.
                //              This is an optional method, and is usually provided by dojo.store.Observable.
                // listener: Function
                //              The listener function is called when objects in the query results are modified
                //              to affect the query result. The listener function is called with the following
                // arguments:
                //              | listener(object, removedFrom, insertedInto);
                //              * The object parameter indicates the object that was create, modified, or deleted.
                //              * The removedFrom parameter indicates the index in the result array where
                //              the object used to be. If the value is -1, then the object is an addition to
                //              this result set (due to a new object being created, or changed such that it
                //              is a part of the result set).
                //              * The insertedInto parameter indicates the index in the result array where
                //              the object should be now. If the value is -1, then the object is a removal
                //              from this result set (due to an object being deleted, or changed such that it
                //              is not a part of the result set).
                // includeAllUpdates:
                //              This indicates whether or not to include object updates that do not affect
                //              the inclusion or order of the object in the query results. By default this is false,
                //              which means that if any object is updated in such a way that it remains
                //              in the result set and it's position in result sets is not affected, then the listener
                //              will not be fired.

        },
        // total: Number|Promise?
        //              This property should be included in if the query options included the "count"
        //              property limiting the result set. This property indicates the total number of objects
        //              matching the query (as if "start" and "count" weren't present). This may be
        //              a promise if the query is asynchronous.
        total: 0
});

declare("dojo.store.api.Store.Transaction", null, {
        // summary:
        //              This is an object returned from transaction() calls that represents the current
        //              transaction.

        commit: function(){
                // summary:
                //              Commits the transaction. This may throw an error if it fails. Of if the operation
                //              is asynchronous, it may return a promise that represents the eventual success
                //              or failure of the commit.
        },
        abort: function(callback, thisObject){
                // summary:
                //              Aborts the transaction. This may throw an error if it fails. Of if the operation
                //              is asynchronous, it may return a promise that represents the eventual success
                //              or failure of the abort.
        }
});
return Store;
});