jaydata-mongodb/lib/Types/StorageProviders/mongoDB/mongoDBPagingCompiler.js

Cross-platform HTML5 data-management, JavaScript Language Query (JSLQ) support for OData, SQLite, WebSQL, IndexedDB, YQL and Facebook (packaged for Node.JS)

$C('$data.storageProviders.mongoDB.mongoDBPagingCompiler', $data.Expressions.EntityExpressionVisitor, null, {
    constructor: function (provider) {
        this.provider = provider;
    },

    compile: function (expression, context) {
        this.Visit(expression, context);
    },
    VisitPagingExpression: function (expression, context) {
        var pagingContext = { data: 0 };
        this.Visit(expression.amount, pagingContext);
        switch (expression.nodeType) {
            case $data.Expressions.ExpressionType.Skip: context.options.skip = pagingContext.data; break;
            case $data.Expressions.ExpressionType.Take: context.options.limit = pagingContext.data; break;
            default: Guard.raise("Not supported nodeType"); break;
        }
    },
    VisitConstantExpression: function (expression, context) {
        context.data += expression.value;
    }
});