Package io.atlasmap.expression

Interface Expression

All Known Subinterfaces:

BooleanExpression

All Known Implementing Classes:

ArithmeticExpression, BinaryExpression, ComparisonExpression, ConstantExpression, LogicExpression, UnaryExpression, VariableExpression

public interface Expression

Parses and evaluates a simple expression language. This was originally based on the selector expression language found in ActiveMQ. It was modified so that it's supports custom functions and it's comparison expressions were less SQL like, and more script like.

Field Summary

Fields

Modifier and Type	Field	Description
static final LRUCache<String,Object>	CACHE

Method Summary

Modifier and Type	Method	Description
static void	clearCache()
Field	evaluate(ExpressionContext expressionContext)	Execute the expression against the given context.
static Expression	parse(String expessionText, FunctionResolver functionResolver)

Field Details

CACHE

static final LRUCache<String,Object> CACHE

Method Details

evaluate

Field evaluate(ExpressionContext expressionContext)
        throws ExpressionException

Execute the expression against the given context.

Parameters:

expressionContext - ExpressionContext

Returns:

Field represents a result

Throws:

ExpressionException - If evaluation fails

parse

static Expression parse(String expessionText,
 FunctionResolver functionResolver)
                 throws ExpressionException

Throws:

ExpressionException

clearCache

static void clearCache()