91 lines
1.2 KiB
JavaScript
91 lines
1.2 KiB
JavaScript
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var Expr = require ('./expr');
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/**
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* The equivalent of a SQL operation between exprs.
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*
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* @param {Array#Sql.Expr} expr Array with the exprs
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* @param {Sql..Operation.Type} type The type of the operation
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*/
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var Operation = new Class ();
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module.exports = Operation;
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var Type =
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{
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EQUAL : 0
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,LIKE : 1
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,AND : 2
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,OR : 3
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,REGEXP : 4
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};
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var Operators =
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[
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'='
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,'LIKE'
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,'AND'
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,'OR'
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,'REGEXP'
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];
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Operation.extend
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({
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Type: Type
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,Operators: Operators
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});
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Operation.implement
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({
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Extends: Expr
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,Tag: 'sql-operation'
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,Properties:
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{
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type:
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{
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enumType: Type
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,value: -1
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}
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}
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,initialize: function (props)
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{
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this.parent (props);
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this.link ({exprs: new Sql.List ()}, {'changed': this.onListChange});
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}
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,appendChild: function (child)
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{
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this.exprs.add (child);
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}
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,onListChange: function ()
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{
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this.signalEmit ('changed');
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}
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,isReady: function ()
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{
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return this.exprs.isReady ();
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}
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,render: function (batch)
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{
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var sql = '(';
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var operator = ' '+ Operators[this.type] +' ';
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var e = this.exprs.getArray ();
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for (var i = 0; i < e.length; i++)
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{
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if (i > 0)
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sql += operator;
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sql += e[i].render (batch);
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}
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sql += ')';
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return sql;
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}
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});
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