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// Copyright 2012 The Closure Library Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS-IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/**
* @fileoverview Wrapper for a IndexedDB key range.
*
*/
goog.provide('goog.db.KeyRange');
/**
* Creates a new IDBKeyRange wrapper object. Should not be created directly,
* instead use one of the static factory methods. For example:
* @see goog.db.KeyRange.bound
* @see goog.db.KeyRange.lowerBound
*
* @param {!IDBKeyRange} range Underlying IDBKeyRange object.
* @constructor
* @final
*/
goog.db.KeyRange = function(range) {
/**
* Underlying IDBKeyRange object.
*
* @type {!IDBKeyRange}
* @private
*/
this.range_ = range;
};
/**
* The IDBKeyRange.
* @type {!Object}
* @private
*/
goog.db.KeyRange.IDB_KEY_RANGE_ =
goog.global.IDBKeyRange || goog.global.webkitIDBKeyRange;
/**
* Creates a new key range for a single value.
*
* @param {IDBKeyType} key The single value in the range.
* @return {!goog.db.KeyRange} The key range.
*/
goog.db.KeyRange.only = function(key) {
return new goog.db.KeyRange(goog.db.KeyRange.IDB_KEY_RANGE_.only(key));
};
/**
* Creates a key range with upper and lower bounds.
*
* @param {IDBKeyType} lower The value of the lower bound.
* @param {IDBKeyType} upper The value of the upper bound.
* @param {boolean=} opt_lowerOpen If true, the range excludes the lower bound
* value.
* @param {boolean=} opt_upperOpen If true, the range excludes the upper bound
* value.
* @return {!goog.db.KeyRange} The key range.
*/
goog.db.KeyRange.bound = function(lower, upper, opt_lowerOpen, opt_upperOpen) {
return new goog.db.KeyRange(
goog.db.KeyRange.IDB_KEY_RANGE_.bound(
lower, upper, opt_lowerOpen, opt_upperOpen));
};
/**
* Creates a key range with a lower bound only, finishes at the last record.
*
* @param {IDBKeyType} lower The value of the lower bound.
* @param {boolean=} opt_lowerOpen If true, the range excludes the lower bound
* value.
* @return {!goog.db.KeyRange} The key range.
*/
goog.db.KeyRange.lowerBound = function(lower, opt_lowerOpen) {
return new goog.db.KeyRange(
goog.db.KeyRange.IDB_KEY_RANGE_.lowerBound(lower, opt_lowerOpen));
};
/**
* Creates a key range with a upper bound only, starts at the first record.
*
* @param {IDBKeyType} upper The value of the upper bound.
* @param {boolean=} opt_upperOpen If true, the range excludes the upper bound
* value.
* @return {!goog.db.KeyRange} The key range.
*/
goog.db.KeyRange.upperBound = function(upper, opt_upperOpen) {
return new goog.db.KeyRange(
goog.db.KeyRange.IDB_KEY_RANGE_.upperBound(upper, opt_upperOpen));
};
/**
* Returns underlying key range object. This is used in ObjectStore's openCursor
* and count methods.
* @return {!IDBKeyRange}
*/
goog.db.KeyRange.prototype.range = function() {
return this.range_;
};
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