com.saperion.database.query.visitor

Class ExpressionTemplateEvaluator

java.lang.Object

com.saperion.database.query.visitor.QueryExpressionCopier

com.saperion.database.query.visitor.ExpressionTemplateEvaluator

All Implemented Interfaces:

QueryExpressionVisitor

public class ExpressionTemplateEvaluator
extends QueryExpressionCopier

This QueryExpressionVisitor evaluates an expression template with given template parameters.

Author:

jschwarz

Field Summary

Fields inherited from class com.saperion.database.query.visitor.QueryExpressionCopier

results

Method Summary

Modifier and Type	Method and Description
static <ExpressionType> QueryExpression<ExpressionType>	evaluateExpressionTemplate(QueryExpression<ExpressionType> template, Map<String,QueryExpression<?>> parameters) This utility method evaluates a query expression template with the given parameters.
<Type> void	visit(TemplateParameter<Type> expression)

Methods inherited from class com.saperion.database.query.visitor.QueryExpressionCopier

copyExpression, finishVisit, finishVisit, finishVisit, finishVisit, finishVisit, finishVisit, finishVisit, finishVisit, finishVisit, finishVisit, finishVisit, finishVisit, finishVisit, finishVisit, finishVisit, finishVisit, finishVisit, finishVisit, finishVisit, finishVisit, finishVisit, finishVisit, finishVisit, finishVisit, finishVisit, finishVisit, pop, popExpression, startVisit, startVisit, startVisit, startVisit, startVisit, startVisit, startVisit, startVisit, startVisit, startVisit, startVisit, startVisit, startVisit, startVisit, startVisit, startVisit, startVisit, startVisit, startVisit, startVisit, startVisit, startVisit, startVisit, startVisit, startVisit, startVisit, visit, visit, visit, visit, visit

Methods inherited from class java.lang.Object

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

Method Detail

visit

public <Type> void visit(TemplateParameter<Type> expression)

Specified by:

visit in interface QueryExpressionVisitor

Overrides:

visit in class QueryExpressionCopier

evaluateExpressionTemplate

public static <ExpressionType> QueryExpression<ExpressionType> evaluateExpressionTemplate(QueryExpression<ExpressionType> template,
                                                                                          Map<String,QueryExpression<?>> parameters)

This utility method evaluates a query expression template with the given parameters. The result may still contain unbound parameters.

Parameters:

template - the template to evaluate

parameters - the parameters to evaluate the template with

Returns:

a query expression where occurrences of named parameters are replaced with the given parameters.