Package com.espertech.esper.common.internal.view.util

Class ViewForgeSupport

java.lang.Object

com.espertech.esper.common.internal.view.util.ViewForgeSupport

public class ViewForgeSupport
extends Object

Constructor Summary

Constructors

Constructor	Description
ViewForgeSupport()

Method Summary

Modifier and Type	Method	Description
static void	assertReturnsNonConstant(String viewName, ExprNode expression, int index)	Assert and throws an exception if the expression passed returns a non-constant value.
static Object	evaluate(ExprEvaluator evaluator, int expressionNumber, String viewName)
static Object	evaluateAssertNoProperties(String viewName, ExprNode expression, int index)
static ExprNode[]	validate(String viewName, EventType eventType, List<ExprNode> expressions, boolean allowConstantResult, ViewForgeEnv viewForgeEnv)	Validate the view parameter expressions and return the validated expression for later execution.
static ExprNode[]	validate(String viewName, List<ExprNode> expressions, ViewForgeEnv viewForgeEnv, int streamNumber)
static Object	validateAndEvaluate(String viewName, ExprNode expression, ViewForgeEnv viewForgeEnv)
static Object	validateAndEvaluateExpr(String viewName, ExprNode expression, StreamTypeService streamTypeService, ViewForgeEnv viewForgeEnv, int expressionNumber)
static ExprNode	validateExpr(String viewName, ExprNode expression, StreamTypeService streamTypeService, ViewForgeEnv viewForgeEnv, int expressionNumber)
static void	validateNoParameters(String viewName, List<ExprNode> expressionParameters)
static void	validateNoProperties(String viewName, ExprNode expression, int index)
static ExprForge	validateSizeParam(String viewName, ExprNode sizeNode, int expressionNumber)
static ExprForge	validateSizeSingleParam(String viewName, List<ExprNode> expressionParameters, ViewForgeEnv viewForgeEnv, int streamNumber)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ViewForgeSupport

public ViewForgeSupport()

Method Details

validateAndEvaluate

public static Object validateAndEvaluate(String viewName,
 ExprNode expression,
 ViewForgeEnv viewForgeEnv)
                                  throws ViewParameterException

Throws:

ViewParameterException

evaluateAssertNoProperties

public static Object evaluateAssertNoProperties(String viewName,
 ExprNode expression,
 int index)
                                         throws ViewParameterException

Throws:

ViewParameterException

assertReturnsNonConstant

public static void assertReturnsNonConstant(String viewName,
 ExprNode expression,
 int index)
                                     throws ViewParameterException

Assert and throws an exception if the expression passed returns a non-constant value.

Parameters:

viewName - textual name of view

expression - expression to check

index - number offset of expression in view parameters

Throws:

ViewParameterException - if assertion fails

validateNoProperties

public static void validateNoProperties(String viewName,
 ExprNode expression,
 int index)
                                 throws ViewParameterException

Throws:

ViewParameterException

validateAndEvaluateExpr

public static Object validateAndEvaluateExpr(String viewName,
 ExprNode expression,
 StreamTypeService streamTypeService,
 ViewForgeEnv viewForgeEnv,
 int expressionNumber)
                                      throws ViewParameterException

Throws:

ViewParameterException

validateSizeSingleParam

public static ExprForge validateSizeSingleParam(String viewName,
 List<ExprNode> expressionParameters,
 ViewForgeEnv viewForgeEnv,
 int streamNumber)
                                         throws ViewParameterException

Throws:

ViewParameterException

validateSizeParam

public static ExprForge validateSizeParam(String viewName,
 ExprNode sizeNode,
 int expressionNumber)
                                   throws ViewParameterException

Throws:

ViewParameterException

validate

public static ExprNode[] validate(String viewName,
 EventType eventType,
 List<ExprNode> expressions,
 boolean allowConstantResult,
 ViewForgeEnv viewForgeEnv)
                           throws ViewParameterException

Validate the view parameter expressions and return the validated expression for later execution.

Does not evaluate the expression.

Parameters:

viewName - textual name of view

eventType - is the event type of the parent view or stream attached.

expressions - view expression parameter to validate

allowConstantResult - true to indicate whether expressions that return a constant result should be allowed; false to indicate that if an expression is known to return a constant result the expression is considered invalid

viewForgeEnv - view forge env

Returns:

object result value of parameter expressions

Throws:

ViewParameterException - if the expressions fail to validate

validate

public static ExprNode[] validate(String viewName,
 List<ExprNode> expressions,
 ViewForgeEnv viewForgeEnv,
 int streamNumber)
                           throws ViewParameterException

Throws:

ViewParameterException

validateExpr

public static ExprNode validateExpr(String viewName,
 ExprNode expression,
 StreamTypeService streamTypeService,
 ViewForgeEnv viewForgeEnv,
 int expressionNumber)
                             throws ViewParameterException

Throws:

ViewParameterException

evaluate

public static Object evaluate(ExprEvaluator evaluator,
 int expressionNumber,
 String viewName)
                       throws ViewParameterException

Throws:

ViewParameterException

validateNoParameters

public static void validateNoParameters(String viewName,
 List<ExprNode> expressionParameters)
                                 throws ViewParameterException

Throws:

ViewParameterException