Package org.apache.commons.jexl3.internal

Class TemplateEngine.JexlBasedExpression

java.lang.Object

org.apache.commons.jexl3.internal.TemplateEngine.TemplateExpression

org.apache.commons.jexl3.internal.TemplateEngine.JexlBasedExpression

All Implemented Interfaces:

JxltEngine.Expression

Direct Known Subclasses:

TemplateEngine.DeferredExpression, TemplateEngine.ImmediateExpression, TemplateEngine.NestedExpression

Enclosing class:

TemplateEngine

abstract class TemplateEngine.JexlBasedExpression
extends TemplateEngine.TemplateExpression

The base for JEXL based unified expressions.

Field Summary

Fields

Modifier and Type	Field	Description
protected final CharSequence	expr	The JEXL string for this unified expression.
protected final JexlNode	node	The JEXL node for this unified expression.

Fields inherited from class org.apache.commons.jexl3.internal.TemplateEngine.TemplateExpression

source

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	JexlBasedExpression(CharSequence theExpr, JexlNode theNode, TemplateEngine.TemplateExpression theSource)	Creates a JEXL interpretable unified expression.

Method Summary

Modifier and Type	Method	Description
StringBuilder	asString(StringBuilder strb)	Adds this expression's string representation to a StringBuilder.
protected Object	evaluate(Interpreter interpreter)	Interprets a sub-expression.
(package private) JexlInfo	getInfo()
Set<List<String>>	getVariables()	Gets the list of variables accessed by this expression.
protected void	getVariables(Engine.VarCollector collector)	Fills up the list of variables accessed by this unified expression.
protected JexlOptions	options(JexlContext context)	The options to use during evaluation.

Methods inherited from class org.apache.commons.jexl3.internal.TemplateEngine.TemplateExpression

asString, evaluate, evaluate, getSource, getType, isDeferred, isImmediate, prepare, prepare, prepare, toString

Methods inherited from class java.lang.Object

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

Field Details

expr

protected final CharSequence expr

The JEXL string for this unified expression.

node

protected final JexlNode node

The JEXL node for this unified expression.

Constructor Details

JexlBasedExpression

protected JexlBasedExpression(CharSequence theExpr,
 JexlNode theNode,
 TemplateEngine.TemplateExpression theSource)

Creates a JEXL interpretable unified expression.

Parameters:

theExpr - the unified expression as a string

theNode - the unified expression as an AST

theSource - the source unified expression if any

Method Details

asString

public StringBuilder asString(StringBuilder strb)

Description copied from interface: JxltEngine.Expression

Adds this expression's string representation to a StringBuilder.

Parameters:

strb - the builder to fill

Returns:

the builder argument

evaluate

protected Object evaluate(Interpreter interpreter)

Description copied from class: TemplateEngine.TemplateExpression

Interprets a sub-expression.

Specified by:

evaluate in class TemplateEngine.TemplateExpression

Parameters:

interpreter - a JEXL interpreter

Returns:

the result of interpretation

getInfo

JexlInfo getInfo()

Overrides:

getInfo in class TemplateEngine.TemplateExpression

Returns:

the info

getVariables

public Set<List<String>> getVariables()

Description copied from interface: JxltEngine.Expression

Gets the list of variables accessed by this expression.

This method will visit all nodes of the sub-expressions and extract all variables whether they are written in 'dot' or 'bracketed' notation. (a.b is equivalent to a['b']).

Specified by:

getVariables in interface JxltEngine.Expression

Overrides:

getVariables in class TemplateEngine.TemplateExpression

Returns:

the set of variables, each as a list of strings (ant-ish variables use more than 1 string) or the empty set if no variables are used

getVariables

protected void getVariables(Engine.VarCollector collector)

Description copied from class: TemplateEngine.TemplateExpression

Fills up the list of variables accessed by this unified expression.

Overrides:

getVariables in class TemplateEngine.TemplateExpression

Parameters:

collector - the variable collector

options

protected JexlOptions options(JexlContext context)

Description copied from class: TemplateEngine.TemplateExpression

The options to use during evaluation.

Overrides:

options in class TemplateEngine.TemplateExpression

Parameters:

context - the context

Returns:

the options