117 lines
3.5 KiB
JavaScript
117 lines
3.5 KiB
JavaScript
/*
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Copyright (c) 2009, Yahoo! Inc. All rights reserved.
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Code licensed under the BSD License:
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http://developer.yahoo.net/yui/license.txt
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version: 3.0.0
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build: 1549
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*/
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YUI.add('dataschema-text', function(Y) {
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/**
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* Provides a DataSchema implementation which can be used to work with delimited text data.
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*
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* @module dataschema
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* @submodule dataschema-text
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*/
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/**
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* Text subclass for the DataSchema Utility.
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* @class DataSchema.Text
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* @extends DataSchema.Base
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* @static
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*/
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var LANG = Y.Lang,
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SchemaText = {
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/////////////////////////////////////////////////////////////////////////////
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//
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// DataSchema.Text static methods
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//
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/////////////////////////////////////////////////////////////////////////////
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/**
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* Applies a given schema to given delimited text data.
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*
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* @method apply
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* @param schema {Object} Schema to apply.
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* @param data {Object} Text data.
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* @return {Object} Schema-parsed data.
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* @static
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*/
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apply: function(schema, data) {
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var data_in = data,
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data_out = {results:[],meta:{}};
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if(LANG.isString(data_in) && LANG.isString(schema.resultDelimiter)) {
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// Parse results data
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data_out = SchemaText._parseResults(schema, data_in, data_out);
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}
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else {
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data_out.error = new Error("Text schema parse failure");
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}
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return data_out;
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},
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/**
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* Schema-parsed list of results from full data
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*
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* @method _parseResults
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* @param schema {Array} Schema to parse against.
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* @param text_in {String} Text to parse.
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* @param data_out {Object} In-progress parsed data to update.
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* @return {Object} Parsed data object.
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* @static
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* @protected
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*/
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_parseResults: function(schema, text_in, data_out) {
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var resultDelim = schema.resultDelimiter,
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results = [],
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results_in, fields_in, result, item, fields, field, key, value, i, j,
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// Delete final delimiter at end of string if there
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tmpLength = text_in.length-resultDelim.length;
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if(text_in.substr(tmpLength) == resultDelim) {
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text_in = text_in.substr(0, tmpLength);
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}
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// Split into results
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results_in = text_in.split(schema.resultDelimiter);
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for(i=results_in.length-1; i>-1; i--) {
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result = {};
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item = results_in[i];
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if(LANG.isString(schema.fieldDelimiter)) {
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fields_in = item.split(schema.fieldDelimiter);
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if(LANG.isArray(schema.resultFields)) {
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fields = schema.resultFields;
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for(j=fields.length-1; j>-1; j--) {
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field = fields[j];
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key = (!LANG.isUndefined(field.key)) ? field.key : field;
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value = (!LANG.isUndefined(fields_in[key])) ? fields_in[key] : fields_in[j];
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result[key] = Y.DataSchema.Base.parse(value, field);
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}
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}
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}
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else {
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result = item;
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}
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results[i] = result;
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}
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data_out.results = results;
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return data_out;
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}
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};
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Y.DataSchema.Text = Y.mix(SchemaText, Y.DataSchema.Base);
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}, '3.0.0' ,{requires:['dataschema-base']});
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