83 lines
2.1 KiB
JavaScript
83 lines
2.1 KiB
JavaScript
/**
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* Copyright 2009 Google Inc., 2011 Peter 'Pita' Martischka
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS-IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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exports.createAttributePool = function () {
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var p = {};
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p.numToAttrib = {}; // e.g. {0: ['foo','bar']}
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p.attribToNum = {}; // e.g. {'foo,bar': 0}
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p.nextNum = 0;
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p.putAttrib = function (attrib, dontAddIfAbsent) {
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var str = String(attrib);
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if (str in p.attribToNum) {
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return p.attribToNum[str];
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}
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if (dontAddIfAbsent) {
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return -1;
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}
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var num = p.nextNum++;
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p.attribToNum[str] = num;
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p.numToAttrib[num] = [String(attrib[0] || ''), String(attrib[1] || '')];
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return num;
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};
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p.getAttrib = function (num) {
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var pair = p.numToAttrib[num];
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if (!pair) {
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return pair;
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}
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return [pair[0], pair[1]]; // return a mutable copy
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};
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p.getAttribKey = function (num) {
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var pair = p.numToAttrib[num];
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if (!pair) return '';
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return pair[0];
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};
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p.getAttribValue = function (num) {
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var pair = p.numToAttrib[num];
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if (!pair) return '';
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return pair[1];
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};
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p.eachAttrib = function (func) {
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for (var n in p.numToAttrib) {
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var pair = p.numToAttrib[n];
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func(pair[0], pair[1]);
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}
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};
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p.toJsonable = function () {
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return {
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numToAttrib: p.numToAttrib,
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nextNum: p.nextNum
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};
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};
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p.fromJsonable = function (obj) {
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p.numToAttrib = obj.numToAttrib;
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p.nextNum = obj.nextNum;
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p.attribToNum = {};
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for (var n in p.numToAttrib) {
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p.attribToNum[String(p.numToAttrib[n])] = Number(n);
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}
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return p;
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};
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return p;
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}
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