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Copyright (c) 2012, Motorola Mobility LLC.
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* Redistributions of source code must retain the above copyright notice,
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/**
 @module montage/data/mapping
 @requires montage/data/blueprint
 @requires montage/data/store-connection-information
 @requires montage/core/core
 @requires montage/core/logger
 */
var Montage = require("montage").Montage;
var Blueprint = require("data/blueprint").Blueprint;
var BlueprintBinder = require("data/blueprint").BlueprintBinder;
var Attribute = require("data/blueprint").Attribute;
var Association = require("data/blueprint").Association;
var StoreConnectionInformation = require("data/store-connection-information").StoreConnectionInformation;
var logger = require("core/logger").logger("mapping");
/**
 * A mapping is an abstract class that is defined by each access store to represent the way to map an object or a property in the backing store.
 @class module:montage/data/mapping.Mapping
 @extends module:montage/core/core.Montage
 */
var Mapping = exports.Mapping = Montage.create(Montage, /** @lends module:montage/data/mapping.Mapping# */ {

    /**
     * @private
     */
    _owner:{
        serializable:true,
        enumerable:false,
        value:null
    },


    /**
     * The owner is the blueprint object (binder, blueprint attribute or association) that is supported by this mapping
     */
    owner:{
        get:function () {
            return this._owner;
        }
    },

    /**
     * @private
     */
    _parent:{
        serializable:true,
        enumerable:false,
        value:null
    },

    /**
     * The parent is the mapping object that contains this mapping
     */
    parent:{
        get:function () {
            return this._parent;
        }
    },

    /**
     Name of the mapping. The name is used to identify a mapping.
     @function
     @returns {String} this.parent.name
     */
    name:{
        get:function () {
            return this.parent.name;
        }
    },


    /**
     Store module Id associated with this binder mapping.
     @type {Property}
     @default {ID} montage/data/store
     */
    storeModuleId:{
        get:function () {
            return this.parent.storeModuleId;
        }
    },

    /**
     Store prototype name associated with this binder mapping.
     @type {Property}
     @default {String} "Store"
     */
    storePrototypeName:{
        get:function () {
            return this.parent.storePrototypeName;
        }
    },


    /**
     Initialize a newly allocated mapping.
     @function
     @param {owner} owner of this mapping
     @param {parent} container of this mapping
     @returns itself
     */
    initWithOwnerAndParent:{
        value:function (owner, parent) {
            this._owner = owner;
            this._parent = parent;
            return this;
        }
    }

});

/**
 * A mapping folder is a group of binder mappings that all relate to the same binder.<br/>
 * Together they provide exactly one mapping for each blueprint, attribute and association described in the binder.<br/>
 *
 * @class module:montage/data/mapping.MappingFolder
 * @extends module:montage/data/mapping.Mapping
 */
var MappingFolder = exports.MappingFolder = Montage.create(Mapping, /** @lends module:montage/data/mapping.MappingFolder# */ {

    /**
     @private
     */
    _name:{
        serializable:true,
        enumerable:false,
        value:null
    },

    /**
     Name of the mapping. The name is used to identify a mapping.
     @function
     @returns {String} this._name
     */
    name:{
        get:function () {
            return this._name;
        }
    },

    /**
     Binder that owns this mapping.
     @type {Property}
     @default {ID} montage/data/blueprint.BlueprintBinder
     */
    binder:{
        get:function () {
            return this._owner;
        }
    },

    /**
     Initialize a newly allocated mapping.
     @function
     @param {binder} owner of this mapping
     @param {name} name of this mapping. The name should be unique for a binder.
     @returns itself
     */
    initWithBinderAndName:{
        value:function (binder, name) {
            var newMapping = this.initWithOwnerAndParent(binder, null);
            newMapping._name = name;
            return newMapping;
        }
    },

    /**
     The identifier is the name of the blueprint, dot, the name of the
     attribute, and is used to make the serialization of attributes more
     readable.
     @type {Property}
     @default {String} this.name
     */
    identifier:{
        get:function () {
            return [
                this.name,
                this.owner.name
            ].join("_");
        }
    },

    /**
     @private
     */
    _mappings:{
        serializable:true,
        enumerable:false,
        distinct:true,
        value:new Array(5)
    },

    /**
     @private
     */
    _mappingForStoreId:{
        value:new Object(),
        serializable:false,
        distinct:true,
        enumerable:false,
        writable:false
    },

    deserializedFromSerialization:{
        value:function () {
            var aMapping, index;
            for (index = 0; typeof (aMapping = this._mappings[index]) !== "undefined"; index++) {
                var key = [
                    aMapping.storePrototypeName,
                    aMapping.storeModuleId
                ].join("_");
                this._mappingForStoreId[key] = aMapping;
            }
        }
    },

    /**
     List of mappings attached to this object.
     @function
     @returns mappings
     */
    mappings:{
        get:function () {
            return this._mappings;
        }
    },

    /**
     Add a mapping to the list of mappings.
     @function
     @param {mapping} mapping to add.
     @returns mapping
     */
    addMapping:{
        value:function (mapping) {
            if (mapping !== null) {
                var index = this.mappings.indexOf(mapping);
                if (index < 0) {
                    if (mapping.parent !== this) {
                        throw new Error(
                            "Mapping already owned: " + mapping.storeModuleId + "/" + mapping.storePrototypeName + " parent: " + JSON.stringify(mapping.parent.name));
                    }
                    this.mappings.push(mapping);
                    //
                    var key = [
                        mapping.storePrototypeName,
                        mapping.storeModuleId
                    ].join("_");
                    this._mappingForStoreId[key] = mapping;
                }
            }
            return mapping;
        }
    },

    /**
     Remove a mapping to the list of mappings.
     @function
     @param {mapping} mapping to remove.
     @returns mapping
     */
    removeMapping:{
        value:function (mapping) {
            if (mapping !== null) {
                var index = this.mappings.indexOf(mapping);
                if (index >= 0) {
                    this.mappings.splice(index, 1);
                    // Remove the cached entry
                    var key = [
                        mapping.storePrototypeName,
                        mapping.storeModuleId
                    ].join("_");
                    delete this._mappingForStoreId[key];
                }
            }
            return mapping;
        }
    },

    /*
     * @private
     */
    _storeKeyForStore:{
        value:function (store) {
            var metadata = Montage.getInfoForObject(store);
            return [
                metadata.objectName,
                metadata.moduleId
            ].join("_");
        }
    },

    /**
     Retrieve a mapping from the list of mappings.<br/>
     @function
     @param {storePrototypeName} name of the store to retrieve.
     @param {storeModuleId} module Id of the store to retrieve.
     @returns mapping
     */
    mappingForStoreId:{
        value:function (storePrototypeName, storeModuleId) {
            var key = [
                storePrototypeName,
                storeModuleId
            ].join("_");
            return this._mappingForStoreId[key];
        }
    }

});

/**
 * A binder mapping is an abstract class that is defined by each access store to represent the way to way to access a the backing store.
 @class module:montage/data/mapping.BinderMapping
 @extends module:montage/data/mapping.Mapping
 */
var BinderMapping = exports.BinderMapping = Montage.create(Mapping, /** @lends module:montage/data/mapping.BinderMapping# */ {

    /**
     Binder that owns this mapping.
     @type {Property}
     @default {ID} montage/data/blueprint.BlueprintBinder
     */
    binder:{
        get:function () {
            return this._owner;
        }
    },

    /**
     The identifier is the name of the blueprint, dot, the name of the
     attribute, and is used to make the serialization of attributes more
     readable.
     @type {Property}
     @default {String} this.name
     */
    identifier:{
        get:function () {
            return [
                this.parent.identifier,
                this.storeModuleId,
                this.storePrototypeName,
                this.owner.name
            ].join("_");
        }
    },

    /**
     Store module Id associated with this binder mapping.
     @type {Property}
     @default {ID} montage/data/store
     */
    storeModuleId:{
        get:function () {
            return "data/store";
        }
    },

    /**
     Store prototype name associated with this binder mapping.
     @type {Property}
     @default {String} "Store"
     */
    storePrototypeName:{
        get:function () {
            return "Store";
        }
    },


    /**
     @private
     */
    _connectionInformations:{
        serializable:true,
        enumerable:false,
        value:{}
    },


    /**
     List of connection information attached to this binder mapping.
     @function
     @returns mappings
     */
    connectionInformations:{
        get:function () {
            return this._connectionInformations;
        }
    },


    /**
     @private
     */
    _connectionInfoForName:{
        value:{},
        serializable:false,
        distinct:true,
        enumerable:false,
        writable:false
    },

    deserializedFromSerialization:{
        value:function () {
            var anInfo, index;
            for (index = 0; typeof (anInfo = this.connectionInformations[index]) !== "undefined"; index++) {
                this._connectionInfoForName[anInfo.name] = anInfo;
            }
        }
    },

    /*
     * Create a new connection information object. This can be overwritten by subclass if necessary.
     * @function
     * @returns connection information
     */
    createConnectionInformation:{
        value:function () {
            return StoreConnectionInformation.create();
        }
    },

    /**
     Add a connection information to the list of connection information.
     @function
     @param {info} connection information to add.
     @returns info
     */
    addConnectionInformation:{
        value:function (info) {
            if (info !== null) {
                var index = this.connectionInformations.indexOf(info);
                if (index < 0) {
                    this.connectionInformations.push(info);
                    // Add the cache
                    this._connectionInfoForName[info.name] = info;
                    // Fix the default
                    if (this._defaultConnectionInformationName.length == 0) {
                        this._defaultConnectionInformationName = info.name;
                    }
                }
            }
            return mapping;
        }
    },

    /**
     Remove a connection information to the list of connection information.
     @function
     @param {info} connection information to remove.
     @returns info
     */
    removeConnectionInformation:{
        value:function (info) {
            if (info !== null) {
                var index = this.connectionInformations.indexOf(info);
                if (index >= 0) {
                    this.connectionInformations.splice(index, 1);
                    // Remove the cached entry
                    delete this._connectionInfoForName[info.name];
                    // Fix the default
                    if ((this._defaultConnectionInformationName.length > 0) && (this._defaultConnectionInformationName === info.name)) {
                        if (this.connectionInformations.length > 0) {
                            this._defaultConnectionInformationName = this.connectionInformations[0].name;
                        } else {
                            this._defaultConnectionInformationName = "";
                        }
                    }
                }
            }
            return mapping;
        }
    },

    /**
     Retrieve a connection information object from the list of connection information.<br/>
     @function
     @param {name} name of the connection information to retrieve.
     @returns connection information
     */
    connectionInformationForName:{
        value:function (name) {
            return this._connectionInfoForName[name];
        }
    },


    _defaultConnectionInformationName:{
        serializable:true,
        enumerable:false,
        value:""
    },

    defaultConnectionInformationName:{
        get:function () {
            if (this._defaultConnectionInformationName.length == 0) {
                if (this.connectionInformations.length > 0) {
                    this._defaultConnectionInformationName = this.connectionInformations[0].name;
                }
            }
            return this._defaultConnectionInformationName;
        },
        set:function (name) {
            this._defaultConnectionInformationName = name;
        }
    },

    defaultConnectionInformation:{
        get:function () {
            return this.connectionInformationForName(this.defaultConnectionInformationName);
        }
    }


});


/**
 * A blueprint mapping is an abstract class that is defined by each access store to represent the way to way to access a the backing store.
 @class module:montage/data/mapping.BlueprintMapping
 @extends module:montage/data/mapping.Mapping
 */
var BlueprintMapping = exports.BlueprintMapping = Montage.create(Mapping, /** @lends module:montage/data/mapping.BlueprintMapping# */ {

    /**
     Blueprint that owns this mapping.
     @type {Property}
     @default {ID} montage/data/blueprint.Blueprint
     */
    blueprint:{
        get:function () {
            return this._owner;
        }
    },

    /**
     The identifier is the name of the blueprint, dot, the name of the
     attribute, and is used to make the serialization of attributes more
     readable.
     @type {Property}
     @default {String} this.name
     */
    identifier:{
        get:function () {
            return [
                this.parent.identifier,
                this.owner.name
            ].join("_");
        }
    }

});


/**
 * An attribute mapping is an abstract class that is defined by each access store to represent the way to way to access a the backing store.
 @class module:montage/data/mapping.AttributeMapping
 @extends module:montage/data/mapping.Mapping
 */
var AttributeMapping = exports.AttributeMapping = Montage.create(Mapping, /** @lends module:montage/data/mapping.AttributeMapping# */ {

    /**
     Attribute that owns this mapping.
     @type {Property}
     @default {ID} montage/data/blueprint.Attribute
     */
    attribute:{
        get:function () {
            return this._owner;
        }
    },

    /**
     The identifier is the name of the blueprint, dot, the name of the
     attribute, and is used to make the serialization of attributes more
     readable.
     @type {Property}
     @default {String} this.name
     */
    identifier:{
        get:function () {
            return [
                this.parent.identifier,
                this.owner.name
            ].join("_");
        }
    }

});


/**
 * An association mapping is an abstract class that is defined by each access store to represent the way to way to access a the backing store.
 @class module:montage/data/mapping.AssociationMapping
 @extends module:montage/data/mapping.Mapping
 */
var AssociationMapping = exports.AssociationMapping = Montage.create(Mapping, /** @lends module:montage/data/mapping.AssociationMapping# */ {

    /**
     Association that owns this mapping.
     @type {Property}
     @default {ID} montage/data/blueprint.Association
     */
    association:{
        get:function () {
            return this._owner;
        }
    },

    /**
     The identifier is the name of the blueprint, dot, the name of the
     attribute, and is used to make the serialization of attributes more
     readable.
     @type {Property}
     @default {String} this.name
     */
    identifier:{
        get:function () {
            return [
                this.parent.identifier,
                this.owner.name
            ].join("_");
        }
    }

});