Package com.espertech.esper.epl.expression

Examples of com.espertech.esper.epl.expression.ExprNode

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        // find the properties coming from the expressions of the select clause
        int count = written.size();
        for (int i = 0; i < selectExprContext.getExpressionNodes().length; i++) {
            String columnName = selectExprContext.getColumnNames()[i];
            ExprEvaluator evaluator = selectExprContext.getExpressionNodes()[i];
            ExprNode exprNode = exprNodes[i];

            WriteablePropertyDescriptor writable = findWritable(columnName, writables);
            if (writable == null) {
                throw new ExprValidationException("Failed to find column '" + columnName + "' in target type '" + oaResultType.getName() + "'");
            }

            TypeWidener widener = TypeWidenerFactory.getCheckPropertyAssignType(exprNode.toExpressionString(), exprNode.getExprEvaluator().getType(),
                    writable.getType(), columnName);
            items.add(new Item(count, -1, evaluator, widener));
            written.add(writable);
            count++;
        }
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        // find the properties coming from the expressions of the select clause
        for (int i = 0; i < selectExprContext.getExpressionNodes().length; i++) {
            String columnName = selectExprContext.getColumnNames()[i];
            ExprEvaluator evaluator = selectExprContext.getExpressionNodes()[i];
            ExprNode exprNode = exprNodes[i];

            WriteablePropertyDescriptor writable = findWritable(columnName, writables);
            if (writable == null) {
                throw new ExprValidationException("Failed to find column '" + columnName + "' in target type '" + mapResultType.getName() + "'");
            }

            TypeWidener widener = TypeWidenerFactory.getCheckPropertyAssignType(exprNode.toExpressionString(), exprNode.getExprEvaluator().getType(),
                    writable.getType(), columnName);
            items.add(new Item(count, null, evaluator, widener));
            written.add(writable);
            count++;
        }
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        return raw.getStreamSpecs().get(0).getViewSpecs()[0].getObjectParameters().get(0);
    }

    public Expression compileExpressionToSODA(String expression) throws EPException
    {
        ExprNode node = compileExpression(expression);
        return StatementSpecMapper.unmap(node);
    }
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     * @param astExprNodeMap map to remove node from
     * @return expression
     */
    public static ExprNode getRemoveExpr(Tree child, Map<Tree, ExprNode> astExprNodeMap)
    {
        ExprNode thisEvalNode = astExprNodeMap.get(child);
        astExprNodeMap.remove(child);
        return thisEvalNode;
    }
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        List<ExprNode> exprNodes = new LinkedList<ExprNode>();

        for (int i = startIndex; i < parentNode.getChildCount(); i++)
        {
          Tree currentNode = parentNode.getChild(i);
            ExprNode exprNode = astExprNodeMap.get(currentNode);
            if (exprNode == null)
            {
                throw new IllegalStateException("Expression node for AST node not found for type " + currentNode.getType() + " and text " + currentNode.getText());
            }
            exprNodes.add(exprNode);
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        return exprNodes;
    }

    public static ExprTimePeriod getTimePeriodExpr(Tree node, Map<Tree, ExprNode> astExprNodeMap) {

        ExprNode nodes[] = new ExprNode[8];
        for (int i = 0; i < node.getChildCount(); i++)
        {
            Tree child = node.getChild(i);
            if (child.getType() == EsperEPL2Ast.MILLISECOND_PART)
            {
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            {
                continue;
            }

            Tree childNode = node.getChild(i);
            ExprNode childEvalNode = astExprNodeMap.remove(childNode.getChild(0));
            assignments.add(new OnTriggerSetAssignment(childEvalNode));
        }
        return assignments;
    }
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        {
            // Evaluate assignment expression
            StreamTypeService typeService = new StreamTypeServiceImpl(new EventType[0], new String[0], new boolean[0], services.getEngineURI(), false);
            ExprEvaluatorContextStatement evaluatorContextStmt = new ExprEvaluatorContextStatement(statementContext);
            ExprValidationContext validationContext = new ExprValidationContext(typeService, statementContext.getMethodResolutionService(), null, statementContext.getSchedulingService(), statementContext.getVariableService(), evaluatorContextStmt, statementContext.getEventAdapterService(), statementContext.getStatementName(), statementContext.getStatementId(), statementContext.getAnnotations(), statementContext.getContextDescriptor());
            ExprNode validated = ExprNodeUtility.getValidatedSubtree(createDesc.getAssignment(), validationContext);
            value = validated.getExprEvaluator().evaluate(null, true, evaluatorContextStmt);
        }

        // Create variable
        try
        {
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        // Compare object parameter by object parameter
        int index = 0;
        for (ExprNode thisParam : objectParameters)
        {
            ExprNode otherParam = other.objectParameters.get(index);
            index++;

            if (!ExprNodeUtility.deepEquals(thisParam, otherParam))
            {
                return false;
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                int toStream = substreams[i];

                if (isHistorical[toStream])
                {
                    // There may not be an outer-join descriptor, use if provided to build the associated expression
                    ExprNode outerJoinExpr = null;
                    if (outerJoinDescList.length > 0) {
                        OuterJoinDesc outerJoinDesc;
                        if (toStream == 0)
                        {
                            outerJoinDesc = outerJoinDescList[0];
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Related Classes of com.espertech.esper.epl.expression.ExprNode

  • com.espertech.esper.antlr.ASTUtil
  • com.espertech.esper.core.context.mgr.ContextControllerHashFactory
  • com.espertech.esper.core.EPAdministratorImpl
  • com.espertech.esper.core.service.EPAdministratorImpl
  • com.espertech.esper.core.start.EPPreparedExecuteInsertInto
  • com.espertech.esper.core.start.EPPreparedExecuteSingleStreamUpdate
  • com.espertech.esper.core.start.EPStatementStartMethodCreateVariable
  • com.espertech.esper.dataflow.ops.Filter
  • com.espertech.esper.epl.agg.rollup.GroupByExpressionHelper
  • com.espertech.esper.epl.core.ColumnNamedNodeSwapper
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