Package org.apache.commons.jexl3.internal

Class TemplateEngine.CompositeExpression

java.lang.Object

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

org.apache.commons.jexl3.internal.TemplateEngine.CompositeExpression

All Implemented Interfaces:

JxltEngine.Expression

Enclosing class:

TemplateEngine

final class TemplateEngine.CompositeExpression
extends TemplateEngine.TemplateExpression

A composite unified expression: "... ${...} ... #{...} ...".

Field Summary

Fields

Modifier and Type	Field	Description
protected final TemplateEngine.TemplateExpression[]	exprs	The list of sub-expression resulting from parsing.
private final int	meta	Bit encoded (deferred count > 0) bit 1, (immediate count > 0) bit 0.

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

source

Constructor Summary

Constructors

Constructor	Description
CompositeExpression(int[] counters, List<TemplateEngine.TemplateExpression> list, TemplateEngine.TemplateExpression src)	Creates a composite 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) TemplateEngine.ExpressionType	getType()	Gets this TemplateExpression type.
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.
boolean	isImmediate()	Checks whether this expression is immediate.
protected TemplateEngine.TemplateExpression	prepare(Interpreter interpreter)	Prepares a sub-expression for interpretation.

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

asString, evaluate, evaluate, getInfo, getSource, isDeferred, options, prepare, prepare, toString

Methods inherited from class java.lang.Object

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

Field Details

meta

private final int meta

Bit encoded (deferred count > 0) bit 1, (immediate count > 0) bit 0.

exprs

protected final TemplateEngine.TemplateExpression[] exprs

The list of sub-expression resulting from parsing.

Constructor Details

CompositeExpression

CompositeExpression(int[] counters,
 List<TemplateEngine.TemplateExpression> list,
 TemplateEngine.TemplateExpression src)

Creates a composite expression.

Parameters:

counters - counters of expressions per type

list - the sub-expressions

src - the source for this 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

getType

TemplateEngine.ExpressionType getType()

Description copied from class: TemplateEngine.TemplateExpression

Gets this TemplateExpression type.

Specified by:

getType in class TemplateEngine.TemplateExpression

Returns:

its type

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)

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

Overrides:

getVariables in class TemplateEngine.TemplateExpression

Parameters:

collector - the variable collector

isImmediate

public boolean isImmediate()

Description copied from interface: JxltEngine.Expression

Checks whether this expression is immediate.

Specified by:

isImmediate in interface JxltEngine.Expression

Overrides:

isImmediate in class TemplateEngine.TemplateExpression

Returns:

true if immediate, false otherwise

prepare

protected TemplateEngine.TemplateExpression prepare(Interpreter interpreter)

Description copied from class: TemplateEngine.TemplateExpression

Prepares a sub-expression for interpretation.

Overrides:

prepare in class TemplateEngine.TemplateExpression

Parameters:

interpreter - a JEXL interpreter

Returns:

a prepared unified expression