113 lines
1.7 KiB
JavaScript
113 lines
1.7 KiB
JavaScript
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var Expr = require ('./expr');
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/**
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* The equivalent of a SQL value.
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**/
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module.exports = new Class
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({
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Extends: Expr
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,Tag: 'sql-value'
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,Properties:
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{
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/**
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* The master param.
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**/
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param:
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{
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type: Vn.Param
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,set: function (x)
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{
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this.link ({_param: x}, {'changed': this.onParamChange});
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this.onParamChange ();
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}
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,get: function ()
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{
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return this._param;
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}
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},
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/**
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* The value.
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**/
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value:
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{
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type: String
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,set: function (x)
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{
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if (Vn.Value.compare (x, this._value))
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return;
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if (x instanceof Date)
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x = x.clone ();
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this._value = x;
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if (this._param && !this.paramLock)
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{
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this.paramLock = true;
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this._param.value = x;
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this.paramLock = false;
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}
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this.signalEmit ('changed');
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}
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,get: function ()
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{
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return this._value;
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}
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}
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}
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,_value: undefined
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,_param: null
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,regexp: new RegExp ('(\\\\)|\'', 'g')
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,paramLock: false
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,onParamChange: function ()
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{
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if (this.paramLock || !this._param)
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return;
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this.paramLock = true;
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this.value = this._param.value;
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this.paramLock = false;
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}
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,isReady: function ()
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{
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return this._value !== undefined;
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}
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,replaceFunc: function (token)
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{
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switch (token)
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{
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case '\\': return '\\\\';
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case '\'': return '\\\'';
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}
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return token;
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}
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,render: function (batch)
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{
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var v = this._value;
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switch (typeof v)
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{
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case 'number':
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return v;
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case 'boolean':
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return (v) ? 'TRUE' : 'FALSE';
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case 'string':
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return "'" + v.replace (this.regexp, this.replaceFunc) + "'";
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case 'object':
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if (v instanceof Date)
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return Vn.Date.strftime (v, '\'%Y-%m-%d\'');
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default:
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return 'NULL';
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}
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}
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});
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