lepu-test-platform-web/node_modules/echarts/lib/data/OrdinalMeta.js

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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
var _util = require("zrender/lib/core/util");
var createHashMap = _util.createHashMap;
var isObject = _util.isObject;
var map = _util.map;
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
/**
* @constructor
* @param {Object} [opt]
* @param {Object} [opt.categories=[]]
* @param {Object} [opt.needCollect=false]
* @param {Object} [opt.deduplication=false]
*/
function OrdinalMeta(opt) {
/**
* @readOnly
* @type {Array.<string>}
*/
this.categories = opt.categories || [];
/**
* @private
* @type {boolean}
*/
this._needCollect = opt.needCollect;
/**
* @private
* @type {boolean}
*/
this._deduplication = opt.deduplication;
/**
* @private
* @type {boolean}
*/
this._map;
}
/**
* @param {module:echarts/model/Model} axisModel
* @return {module:echarts/data/OrdinalMeta}
*/
OrdinalMeta.createByAxisModel = function (axisModel) {
var option = axisModel.option;
var data = option.data;
var categories = data && map(data, getName);
return new OrdinalMeta({
categories: categories,
needCollect: !categories,
// deduplication is default in axis.
deduplication: option.dedplication !== false
});
};
var proto = OrdinalMeta.prototype;
/**
* @param {string} category
* @return {number} ordinal
*/
proto.getOrdinal = function (category) {
return getOrCreateMap(this).get(category);
};
/**
* @param {*} category
* @return {number} The ordinal. If not found, return NaN.
*/
proto.parseAndCollect = function (category) {
var index;
var needCollect = this._needCollect; // The value of category dim can be the index of the given category set.
// This feature is only supported when !needCollect, because we should
// consider a common case: a value is 2017, which is a number but is
// expected to be tread as a category. This case usually happen in dataset,
// where it happent to be no need of the index feature.
if (typeof category !== 'string' && !needCollect) {
return category;
} // Optimize for the scenario:
// category is ['2012-01-01', '2012-01-02', ...], where the input
// data has been ensured not duplicate and is large data.
// Notice, if a dataset dimension provide categroies, usually echarts
// should remove duplication except user tell echarts dont do that
// (set axis.deduplication = false), because echarts do not know whether
// the values in the category dimension has duplication (consider the
// parallel-aqi example)
if (needCollect && !this._deduplication) {
index = this.categories.length;
this.categories[index] = category;
return index;
}
var map = getOrCreateMap(this);
index = map.get(category);
if (index == null) {
if (needCollect) {
index = this.categories.length;
this.categories[index] = category;
map.set(category, index);
} else {
index = NaN;
}
}
return index;
}; // Consider big data, do not create map until needed.
function getOrCreateMap(ordinalMeta) {
return ordinalMeta._map || (ordinalMeta._map = createHashMap(ordinalMeta.categories));
}
function getName(obj) {
if (isObject(obj) && obj.value != null) {
return obj.value;
} else {
return obj + '';
}
}
var _default = OrdinalMeta;
module.exports = _default;