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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
var schemaRegistry = requireNative('schema_registry');
var CHECK = requireNative('logging').CHECK;
var WARNING = requireNative('logging').WARNING;
// An object forEach. Calls |f| with each (key, value) pair of |obj|, using
// |self| as the target.
function forEach(obj, f, self) {
for (var key in obj) {
if ($Object.hasOwnProperty(obj, key))
$Function.call(f, self, key, obj[key]);
}
}
// Assuming |array_of_dictionaries| is structured like this:
// [{id: 1, ... }, {id: 2, ...}, ...], you can use
// lookup(array_of_dictionaries, 'id', 2) to get the dictionary with id == 2.
function lookup(array_of_dictionaries, field, value) {
var filter = function (dict) {return dict[field] == value;};
var matches = array_of_dictionaries.filter(filter);
if (matches.length == 0) {
return undefined;
} else if (matches.length == 1) {
return matches[0]
} else {
throw new Error("Failed lookup of field '" + field + "' with value '" +
value + "'");
}
}
function loadTypeSchema(typeName, defaultSchema) {
var parts = $String.split(typeName, '.');
if (parts.length == 1) {
if (defaultSchema == null) {
WARNING('Trying to reference "' + typeName + '" ' +
'with neither namespace nor default schema.');
return null;
}
var types = defaultSchema.types;
} else {
var schemaName = $Array.join($Array.slice(parts, 0, parts.length - 1), '.');
var types = schemaRegistry.GetSchema(schemaName).types;
}
for (var i = 0; i < types.length; ++i) {
if (types[i].id == typeName)
return types[i];
}
return null;
}
exports.forEach = forEach;
exports.loadTypeSchema = loadTypeSchema;
exports.lookup = lookup;
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