org.apache.commons.jexl2

Class UnifiedJEXL.CompositeExpression

java.lang.Object

org.apache.commons.jexl2.UnifiedJEXL.Expression

org.apache.commons.jexl2.UnifiedJEXL.CompositeExpression

Enclosing class:

UnifiedJEXL

private class UnifiedJEXL.CompositeExpression
extends UnifiedJEXL.Expression

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

Field Summary

Fields

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

Fields inherited from class org.apache.commons.jexl2.UnifiedJEXL.Expression

source

Constructor Summary

Constructors

Constructor and Description
CompositeExpression(int[] counters, java.util.ArrayList<UnifiedJEXL.Expression> list, UnifiedJEXL.Expression src) Creates a composite expression.

Method Summary

Modifier and Type	Method and Description
java.lang.StringBuilder	asString(java.lang.StringBuilder strb) Adds this expression's string representation to a StringBuilder.
protected java.lang.Object	evaluate(Interpreter interpreter) Intreprets a sub-expression.
(package private) UnifiedJEXL.ExpressionType	getType() Gets this expression type.
java.util.Set<java.util.List<java.lang.String>>	getVariables() Gets the list of variables accessed by this expression.
boolean	isImmediate() Checks whether this expression is immediate.
protected UnifiedJEXL.Expression	prepare(Interpreter interpreter) Prepares a sub-expression for interpretation.

Methods inherited from class org.apache.commons.jexl2.UnifiedJEXL.Expression

asString, evaluate, getSource, getVariables, isDeferred, prepare, toString

Methods inherited from class java.lang.Object

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

Field Detail

meta

private final int meta

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

exprs

protected final UnifiedJEXL.Expression[] exprs

The list of sub-expression resulting from parsing.

Constructor Detail

CompositeExpression

CompositeExpression(int[] counters,
                    java.util.ArrayList<UnifiedJEXL.Expression> list,
                    UnifiedJEXL.Expression src)

Creates a composite expression.

Parameters:

counters - counters of expression per type

list - the sub-expressions

src - the source for this expresion if any

Method Detail

isImmediate

public boolean isImmediate()

Checks whether this expression is immediate.

Overrides:

isImmediate in class UnifiedJEXL.Expression

Returns:

true if immediate, false otherwise

getType

UnifiedJEXL.ExpressionType getType()

Gets this expression type.

Specified by:

getType in class UnifiedJEXL.Expression

Returns:

its type

asString

public java.lang.StringBuilder asString(java.lang.StringBuilder strb)

Adds this expression's string representation to a StringBuilder.

Specified by:

asString in class UnifiedJEXL.Expression

Parameters:

strb - the builder to fill

Returns:

the builder argument

getVariables

public java.util.Set<java.util.List<java.lang.String>> getVariables()

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']).

Overrides:

getVariables in class UnifiedJEXL.Expression

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

prepare

protected UnifiedJEXL.Expression prepare(Interpreter interpreter)

Prepares a sub-expression for interpretation.

Overrides:

prepare in class UnifiedJEXL.Expression

Parameters:

interpreter - a JEXL interpreter

Returns:

a prepared expression

evaluate

protected java.lang.Object evaluate(Interpreter interpreter)

Intreprets a sub-expression.

Specified by:

evaluate in class UnifiedJEXL.Expression

Parameters:

interpreter - a JEXL interpreter

Returns:

the result of interpretation