forked from verdnatura/hedera-web
96 lines
1.5 KiB
JavaScript
96 lines
1.5 KiB
JavaScript
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var Result = require ('./result');
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/**
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* This class stores the database results.
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**/
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module.exports = new Class
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({
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results: null
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,error: null
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/**
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* Initilizes the resultset object.
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**/
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,initialize: function (results, error)
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{
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this.results = results;
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this.error = error;
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}
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/**
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* Gets the query error.
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*
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* @return {Db.Err} the error or null if no errors hapened
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**/
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,getError: function ()
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{
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return this.error;
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}
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,fetch: function ()
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{
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if (this.error)
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throw this.error;
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if (this.results !== null
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&& this.results.length > 0)
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return this.results.shift ();
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return null;
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}
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/**
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* Fetchs the next result from the resultset.
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*
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* @return {Db.Result} the result or %null if error or there are no more results
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**/
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,fetchResult: function ()
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{
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var result = this.fetch ();
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if (result !== null)
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{
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if (result.data instanceof Array)
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return new Result (result);
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else
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return true;
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}
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return null;
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}
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/**
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* Fetchs the first row from the next resultset.
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*
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* @return {Array} the row if success, %null otherwise
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**/
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,fetchRow: function ()
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{
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var result = this.fetch ();
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if (result !== null
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&& result.data instanceof Array
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&& result.data.length > 0)
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return result.data[0];
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return null;
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}
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/**
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* Fetchs the first row and column value from the next resultset.
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*
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* @return {Object} the value if success, %null otherwise
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**/
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,fetchValue: function ()
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{
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var row = this.fetchRow ();
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if (row instanceof Array && row.length > 0)
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return row[0];
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return null;
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}
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});
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