@jaxolotl/wdclib
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Required Library to bridge javascript with Tableau. Use the scripts below to create the combined shim library. i.e. npm run-script build_and_copy
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<a href="..\index.html">All files</a> / <a href="index.html">wdclib</a> Shared.js
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">
<span class="cstat-no" title="statement not covered" >import { applyEnums } from './Enums';</span>
<span class="cstat-no" title="statement not covered" >import Table from './Table';</span>
/**
* This class represents the shared parts of the javascript
* library which do not have any dependence on whether we are running in
* the simulator, in Tableau, or anywhere else
*/
class Shared {
/**
*
* @param {Object} tableauApiObj - The already created tableau API object (usually window.tableau)
* @param {Object} privateApiObj - The already created private API object (usually window._tableau)
* @param {Object} globalObj - The global object to attach things to (usually window)
*/
<span class="fstat-no" title="function not covered" > constructor (</span>tableauApiObj, privateApiObj, globalObj) <span class="cstat-no" title="statement not covered" >{</span>
<span class="cstat-no" title="statement not covered" > this.privateApiObj = privateApiObj;</span>
<span class="cstat-no" title="statement not covered" > this.globalObj = globalObj;</span>
<span class="cstat-no" title="statement not covered" > this._hasAlreadyThrownErrorSoDontThrowAgain = false;</span>
<span class="cstat-no" title="statement not covered" > this.changeTableauApiObj(tableauApiObj);</span>
}
/**
* @returns {Undefined}
*/
init () {
<span class="cstat-no" title="statement not covered" > console.log('Initializing shared WDC');</span>
<span class="cstat-no" title="statement not covered" > this.globalObj.onerror = this._errorHandler.bind(this);</span>
// Initialize the functions which will be invoked by the native code
<span class="cstat-no" title="statement not covered" > this._initTriggerFunctions();</span>
// Assign the deprecated functions which aren't availible in this version of the API
<span class="cstat-no" title="statement not covered" > this._initDeprecatedFunctions();</span>
}
/**
*
* @param {Object} tableauApiObj
* @returns {Undefined}
*/
changeTableauApiObj (tableauApiObj) {
<span class="cstat-no" title="statement not covered" > this.tableauApiObj = tableauApiObj;</span>
// Assign our make & register functions right away because a connector can use
// them immediately, even before bootstrapping has completed
<span class="cstat-no" title="statement not covered" > this.tableauApiObj.makeConnector = this._makeConnector.bind(this);</span>
<span class="cstat-no" title="statement not covered" > this.tableauApiObj.registerConnector = this._registerConnector.bind(this);</span>
<span class="cstat-no" title="statement not covered" > applyEnums(this.tableauApiObj);</span>
}
/**
*
* @param {String} message
* @param {String} file
* @param {String} line
* @param {String} column
* @param {Object} errorObj
* @returns {Boolean}
*/
_errorHandler (message, file, line, column, errorObj) {
// print error for debugging in the browser
<span class="cstat-no" title="statement not covered" > console.error(errorObj);</span>
<span class="cstat-no" title="statement not covered" > if (this._hasAlreadyThrownErrorSoDontThrowAgain) {</span>
<span class="cstat-no" title="statement not covered" > console.log('Error already thrown');</span>
<span class="cstat-no" title="statement not covered" > return true;</span>
}
let msg = <span class="cstat-no" title="statement not covered" >message;</span>
<span class="cstat-no" title="statement not covered" > if (errorObj) {</span>
<span class="cstat-no" title="statement not covered" > msg += ' stack:' + errorObj.stack;</span>
} else {
<span class="cstat-no" title="statement not covered" > msg += ' file: ' + file;</span>
<span class="cstat-no" title="statement not covered" > msg += ' line: ' + line;</span>
}
<span class="cstat-no" title="statement not covered" > if (this.tableauApiObj && this.tableauApiObj.abortWithError) {</span>
<span class="cstat-no" title="statement not covered" > this.tableauApiObj.abortWithError(msg);</span>
} else {
<span class="cstat-no" title="statement not covered" > throw msg;</span>
}
<span class="cstat-no" title="statement not covered" > this._hasAlreadyThrownErrorSoDontThrowAgain = true;</span>
<span class="cstat-no" title="statement not covered" > return true;</span>
}
/**
* @returns {Object}
*/
_makeConnector () {
let defaultImpls = <span class="cstat-no" title="statement not covered" >{</span>
init: <span class="fstat-no" title="function not covered" >function (</span>cb) { <span class="cstat-no" title="statement not covered" >cb(); },</span>
shutdown: <span class="fstat-no" title="function not covered" >function (</span>cb) { <span class="cstat-no" title="statement not covered" >cb(); }</span>
};
<span class="cstat-no" title="statement not covered" > return defaultImpls;</span>
}
/**
*
* @param {Object} wdc
* @returns {Undefined}
*/
_registerConnector (wdc) {
// do some error checking on the wdc
const FUNCTION_NAMES = <span class="cstat-no" title="statement not covered" >['init', 'shutdown', 'getSchema', 'getData'];</span>
<span class="cstat-no" title="statement not covered" > for (let ii = FUNCTION_NAMES.length - 1; ii >= 0; ii--) {</span>
<span class="cstat-no" title="statement not covered" > if (typeof (wdc[FUNCTION_NAMES[ii]]) !== 'function') {</span>
<span class="cstat-no" title="statement not covered" > throw new Error(`The connector did not define the required function: ${FUNCTION_NAMES[ii]}`);</span>
}
}
<span class="cstat-no" title="statement not covered" > console.log('Connector registered');</span>
<span class="cstat-no" title="statement not covered" > this.globalObj._wdc = wdc;</span>
<span class="cstat-no" title="statement not covered" > this._wdc = wdc;</span>
}
/**
* @returns {Undefined}
*/
_initTriggerFunctions () {
<span class="cstat-no" title="statement not covered" > this.privateApiObj.triggerInitialization = this._triggerInitialization.bind(this);</span>
<span class="cstat-no" title="statement not covered" > this.privateApiObj.triggerSchemaGathering = this._triggerSchemaGathering.bind(this);</span>
<span class="cstat-no" title="statement not covered" > this.privateApiObj.triggerDataGathering = this._triggerDataGathering.bind(this);</span>
<span class="cstat-no" title="statement not covered" > this.privateApiObj.triggerShutdown = this._triggerShutdown.bind(this);</span>
}
/**
* Starts the WDC
* @returns {Undefined}
*/
_triggerInitialization () {
<span class="cstat-no" title="statement not covered" > this._wdc.init(this.privateApiObj._initCallback);</span>
}
/**
* Starts the schema gathering process
* @returns {Undefined}
*/
_triggerSchemaGathering () {
<span class="cstat-no" title="statement not covered" > this._wdc.getSchema(this.privateApiObj._schemaCallback);</span>
}
/**
* Starts the data gathering process
* @param {Array} tablesAndIncrementValues
* @returns {undefined}
*/
_triggerDataGathering (tablesAndIncrementValues) {
<span class="cstat-no" title="statement not covered" > if (tablesAndIncrementValues.length !== 1) {</span>
<span class="cstat-no" title="statement not covered" > throw new Error(`Unexpected number of tables specified. Expected 1, actual ${tablesAndIncrementValues.length}`);</span>
}
let tableAndIncrementValue = <span class="cstat-no" title="statement not covered" >tablesAndIncrementValues[0];</span>
let isJoinFiltered = <span class="cstat-no" title="statement not covered" >!!tableAndIncrementValue.filterColumnId;</span>
let table = <span class="cstat-no" title="statement not covered" >new Table(</span>
tableAndIncrementValue.tableInfo,
tableAndIncrementValue.incrementValue,
isJoinFiltered,
tableAndIncrementValue.filterColumnId,
tableAndIncrementValue.filterValues,
this.privateApiObj._tableDataCallback
);
<span class="cstat-no" title="statement not covered" > this._wdc.getData(table, this.privateApiObj._dataDoneCallback);</span>
}
/**
* Tells the WDC it's time to shut down
* @returns {Undefined}
*/
_triggerShutdown () {
<span class="cstat-no" title="statement not covered" > this._wdc.shutdown(this.privateApiObj._shutdownCallback);</span>
}
/**
* Initializes a series of global callbacks which have been deprecated in version 2.0.0
* @returns {Undefined}
*/
_initDeprecatedFunctions () {
<span class="cstat-no" title="statement not covered" > this.tableauApiObj.initCallback = this._initCallback.bind(this);</span>
<span class="cstat-no" title="statement not covered" > this.tableauApiObj.headersCallback = this._headersCallback.bind(this);</span>
<span class="cstat-no" title="statement not covered" > this.tableauApiObj.dataCallback = this._dataCallback.bind(this);</span>
<span class="cstat-no" title="statement not covered" > this.tableauApiObj.shutdownCallback = this._shutdownCallback.bind(this);</span>
}
/**
* @deprecated Since v2.0.0
*
* @returns {Undefined}
*/
_initCallback () {
<span class="cstat-no" title="statement not covered" > this.tableauApiObj.abortWithError('tableau.initCallback has been deprecated in version 2.0.0. Please use the callback function passed to init');</span>
}
/**
* @deprecated Since v2.0.0
*
* @param {Array} fieldNames
* @param {Array} types
* @returns {Undefined}
*/
_headersCallback (fieldNames, types) { // eslint-disable-line no-unused-vars
<span class="cstat-no" title="statement not covered" > this.tableauApiObj.abortWithError('tableau.headersCallback has been deprecated in version 2.0.0');</span>
}
/**
* @deprecated Since v2.0.0
*
* @param {*} data
* @param {*} lastRecordToken
* @param {*} moreData
* @returns {Undefined}
*/
_dataCallback (data, lastRecordToken, moreData = null) <span class="cstat-no" title="statement not covered" >{ // eslint-disable-line no-unused-vars</span>
<span class="cstat-no" title="statement not covered" > this.tableauApiObj.abortWithError('tableau.dataCallback has been deprecated in version 2.0.0');</span>
}
/**
* @deprecated Since v2.0.0
*
* @returns {Undefined}
*/
_shutdownCallback () {
<span class="cstat-no" title="statement not covered" > this.tableauApiObj.abortWithError('tableau.shutdownCallback has been deprecated in version 2.0.0. Please use the callback function passed to shutdown');</span>
}
}
export default Shared;
</pre></td></tr>
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