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barista.js
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barista.js
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var barista = function() {
'use strict';
var _singleton = 'singleton',
_perdependency = 'perdependency',
_not_set = 'not_set',
_default = '_default',
_definition = '_definition';
function IncludedNamespace(name, instance) {
this.name = name;
this.instance = instance;
}
function NamespaceNameGenerator() {
var namespaceIndex = 0;
function generate() {
return 'Namespace' + ++namespaceIndex;
}
return {
generate: generate
};
}
function Param(type, value) {
this.type = type;
this.value = value;
}
function newParam(type, value) {
return new Param(type, value);
}
function Params(newParamFunc, newParamsFunc) {
this.value = [];
this.type = 'array';
this.withResolveParam = function(resolve) {
this.value.push(newParamFunc('resolve', resolve));
return this;
};
this.withValueParam = function(value) {
this.value.push(newParamFunc('value', value));
return this;
};
this.withParam = function(func) {
this.value.push(newParamFunc('func', func));
return this;
};
this.withArrayParam = function(addArrayParamsFunc) {
var param = newParamsFunc();
this.value.push(param);
addArrayParamsFunc(param);
return this;
};
}
function newParams() {
return new Params(newParam, newParams);
}
function Entry(paramsObj) {
this.params = paramsObj.value;
this.named = function(name) {
this.name = name;
return this;
};
this.singleton = function() {
this.type = _singleton;
return this;
};
this.perDependency = function() {
this.type = _perdependency;
return this;
};
this.withResolveParam = function(resolve) {
paramsObj.withResolveParam(resolve);
return this;
};
this.withValueParam = function(value) {
paramsObj.withValueParam(value);
return this;
};
this.withParam = function(func) {
paramsObj.withParam(func);
return this;
};
this.withArrayParam = function(addArrayParamsFunc) {
paramsObj.withArrayParam(addArrayParamsFunc);
return this;
};
}
function newEntry() {
return new Entry(newParams());
}
function EntryBuilder(newEntryFunc, requireReg) {
function build() {
var entry = newEntryFunc();
entry.type = entry.type || (requireReg ? _not_set : _perdependency);
entry.name = entry.name || _default;
entry.params = entry.params || [];
return entry;
}
return {
build: build
};
}
function Entries(entryBuilder) {
var entries = [];
function reset() {
entries.length = 0;
}
function getEntries() {
return entries;
}
function withEntry() {
var entry = entryBuilder.build();
entries.push(entry);
return entry;
}
return {
reset: reset,
getEntries: getEntries,
withEntry: withEntry
};
}
function newEntries(requireReg) {
return new Entries(new EntryBuilder(newEntry, requireReg));
}
function Property(namespace, name, implementation) {
function isFunction() {
return typeof(implementation) === 'function';
}
function isObject() {
return isFunction();
}
return {
namespace: namespace,
name: name,
implementation: implementation,
isObject: isObject
};
}
function newProperty(namespace, name, implementation) {
return new Property(namespace, name, implementation);
}
function PropertyExtractor(newPropFunc) {
function extract(ns, name) {
return newPropFunc(ns, name, ns.instance[name]);
}
return {
extract: extract
};
}
function InvokersMapper(invokers) {
function getEntryName(entryName) {
return entryName || _default;
}
function getChild(parent, childName, empty) {
return parent
? parent[childName] || empty
: empty;
}
function isDefaultName(name) {
return name === _default;
}
function find(nsName, itemName, entryName) {
var sourceNs = getChild(invokers, nsName),
obj = getChild(sourceNs, itemName);
return getChild(obj, getEntryName(entryName));
};
function defaultExists(nsName, itemName) {
return find(nsName, itemName, _default) ? true : false;
}
function map(nsName, itemName, entryName, invoker, implementation) {
var sourceNs = getChild(invokers, nsName, {}),
obj = getChild(sourceNs, itemName, {}),
name = getEntryName(entryName);
invokers[nsName] = sourceNs;
sourceNs[itemName] = obj;
obj[name] = invoker;
obj[_definition] = implementation;
if (!isDefaultName(name) && !defaultExists(nsName, itemName)) {
obj[_default] = invoker;
}
};
return {
invokers: invokers,
find: find,
map: map
};
}
function ArgsOverrider(paramsResolver, paramResolver) {
function override(params, args) {
params = params || [];
var i;
if (!args || args.length === 0) {
return params.length > 0 ? paramsResolver.resolve(params) : [];
}
if (params.length <= args.length) {
return args;
}
args = Array.prototype.slice.call(args);
for (i = args.length; i < params.length; ++i) {
args.push(paramResolver.resolve(params[i]));
}
return args;
}
return {
override: override
};
}
function ResolveKey(id) {
var values = id.split('.');
return {
namespace: values[0],
item: values[1],
entry: values.length > 2 ? values[2] : _default
};
}
function ParamsResolver(paramResolver) {
function resolve(params) {
return params.map(paramResolver.resolve);
}
return {
resolve: resolve
};
}
function newParamsResolver(paramResolver) {
return new ParamsResolver(paramResolver);
}
function ParamResolver(invokersMapper, newParamsResolverFunc) {
var me,
resolverMap = {
value: function(param) {
return param.value;
},
func: function(param) {
return param.value();
},
resolve: function(param) {
var key = new ResolveKey(param.value),
invoker = invokersMapper.find(key.namespace, key.item, key.entry);
return invoker ? invoker() : null;
},
array: function(param) {
return newParamsResolverFunc(me).resolve(param.value);
}
};
function resolve(param) {
return resolverMap[param.type](param);
}
me = {
resolve: resolve
};
return me;
}
function Factory(argsOverrider) {
function make(implementation, params, args) {
var obj = Object.create(implementation.prototype),
applyArgs = argsOverrider.override(params, args),
ret = implementation.apply(obj, applyArgs);
return ret && (Object(ret) === ret || typeof(ret) !== 'object') ? ret : obj;
}
return {
make: make
};
}
function InvokerTypeBuilder(factory) {
function buildPerDependency(implementation, params) {
return function() {
return factory.make(implementation, params, arguments);
};
}
function buildSingleton(implementation, params) {
var instance;
return function() {
if (instance) {
return instance;
}
instance = factory.make(implementation, params, arguments);
return instance;
};
}
function buildNotSet(implementation) {
return function() {
throw ('using barista in requireReg mode requires that you register "' + implementation + '" and specify singleton or perDependency');
};
}
return {
buildPerDependency: buildPerDependency,
buildSingleton: buildSingleton,
buildNotSet: buildNotSet
};
}
function InvokerBuilder(typeBuilder) {
var typeMap = {
'perdependency': function(i, p) { return typeBuilder.buildPerDependency(i, p); },
'singleton': function(i, p) { return typeBuilder.buildSingleton(i, p); },
'not_set': function(i, p) { return typeBuilder.buildNotSet(i, p); }
};
function build(prop, entry) {
return typeMap[entry.type](prop.implementation, entry.params);
}
return {
build: build
};
}
function InvokerMapBuilder(invokerBuilder, invokersMapper) {
function build(prop, entries) {
var defaultInvoker,
defaultExplicitlyDefined = false;
entries.forEach(function(entry) {
var invoker = invokerBuilder.build(prop, entry);
invokersMapper.map(prop.namespace.name, prop.name, entry.name, invoker, prop.implementation);
defaultExplicitlyDefined = defaultExplicitlyDefined || entry.name === _default;
if (!defaultInvoker || entry.name === _default) {
defaultInvoker = invoker;
}
});
if (!defaultExplicitlyDefined && defaultInvoker) {
invokersMapper.map(prop.namespace.name, prop.name, _default, defaultInvoker, prop.implementation);
}
}
return {
build: build
};
}
function Resolver(invokersMapper) {
this.resolve = function(id) {
var key = new ResolveKey(id),
invoker = invokersMapper.find(key.namespace, key.item, key.entry);
return invoker ? invoker.apply(null, Array.prototype.slice.call(arguments || []).splice(1)) : null;
};
}
function PropEntriesRegistrar(invokerMapBuilder, invokersMapper, resolver, prop, entries) {
function register(entriesFunc) {
entries.reset();
entriesFunc(entries, invokersMapper.invokers, resolver);
invokerMapBuilder.build(prop, entries.getEntries());
}
return {
prop: prop,
register: register
};
}
function newPropEntriesRegistrar(invokerMapBuilder, invokersMapper, resolver, prop, entries) {
return new PropEntriesRegistrar(invokerMapBuilder, invokersMapper, resolver, prop, entries);
}
function PropEntriesRegistrarBuilder(invokerMapBuilder, invokersMapper, resolver, newEntriesFunc, newPropEntriesRegistrarFunc) {
this.build = function(prop) {
return newPropEntriesRegistrarFunc(invokerMapBuilder, invokersMapper, resolver, prop, newEntriesFunc());
};
}
function NamespaceRegistrarBuilder(extractor, nsPropRegistrarBuilder) {
function addDefaultEntry(entries) {
entries.withEntry();
}
function build(ns) {
var def = {};
var name;
for (name in ns.instance) {
if (ns.instance.hasOwnProperty(name)) {
var prop = extractor.extract(ns, name);
def[prop.name] = nsPropRegistrarBuilder.build(prop);
def[prop.name].register(addDefaultEntry);
}
}
return def;
}
return {
addDefaultEntry: addDefaultEntry,
build: build
};
}
function newNamespaceRegistrarBuilder(invokersMapper, config) {
var paramResolver = new ParamResolver(invokersMapper, newParamsResolver);
return new NamespaceRegistrarBuilder(new PropertyExtractor(newProperty),
new PropEntriesRegistrarBuilder(
new InvokerMapBuilder(
new InvokerBuilder(
new InvokerTypeBuilder(new Factory(
new ArgsOverrider(new ParamsResolver(paramResolver), paramResolver)
)),
invokersMapper
),
invokersMapper
),
invokersMapper,
new Resolver(invokersMapper),
function() { return newEntries(config.requireReg); },
newPropEntriesRegistrar
)
);
}
function NamespaceIncluder(nameGenerator, registrarBuilder) {
this.registrations = {};
this.include = function(namespace, name) {
name = name || nameGenerator.generate();
this.registrations[name] = registrarBuilder.build(new IncludedNamespace(name, namespace));
return this;
};
}
function newNamespaceIncluder(invokers, config) {
return new NamespaceIncluder(new NamespaceNameGenerator(), newNamespaceRegistrarBuilder(new InvokersMapper(invokers), config));
}
function OutputPropBuilder() {
function build(registration, invokers) {
return registration.prop.isObject() ? invokers._default : registration.prop.implementation;
}
return {
build: build
};
}
function OutputBuilder(childBuilder) {
function build(registrations, invokers) {
var namespace = {};
var name;
for (name in registrations) {
if (registrations.hasOwnProperty(name)) {
namespace[name] = childBuilder.build(registrations[name], invokers[name]);
}
}
return namespace;
}
return {
build: build
};
}
function serve(includeFunc, registerFunc, config) {
config = config || {};
var invokers = config.invokers || {},
included = newNamespaceIncluder(invokers, config);
includeFunc(included);
registerFunc(included.registrations);
return {
namespaces: new OutputBuilder(new OutputBuilder(new OutputPropBuilder())).build(included.registrations, invokers),
registered: invokers
};
}
return {
serve: serve,
NamespaceNameGenerator: NamespaceNameGenerator,
Param: Param,
Params: Params,
Entry: Entry,
EntryBuilder: EntryBuilder,
Entries: Entries,
Property: Property,
PropertyExtractor: PropertyExtractor,
InvokersMapper: InvokersMapper,
ArgsOverrider: ArgsOverrider,
ResolveKey: ResolveKey,
ParamsResolver: ParamsResolver,
ParamResolver: ParamResolver,
Factory: Factory,
InvokerTypeBuilder: InvokerTypeBuilder,
InvokerBuilder: InvokerBuilder,
IncludedNamespace: IncludedNamespace,
InvokerMapBuilder: InvokerMapBuilder,
Resolver: Resolver,
PropEntriesRegistrar: PropEntriesRegistrar,
PropEntriesRegistrarBuilder: PropEntriesRegistrarBuilder,
NamespaceRegistrarBuilder: NamespaceRegistrarBuilder,
NamespaceIncluder: NamespaceIncluder,
OutputPropBuilder: OutputPropBuilder,
OutputBuilder: OutputBuilder
};
}();