Package org.apache.commons.jexl3.parser

Class JexlNode

java.lang.Object

org.apache.commons.jexl3.parser.SimpleNode

org.apache.commons.jexl3.parser.JexlNode

All Implemented Interfaces:

JexlCache.Reference, Node

Direct Known Subclasses:

ASTAddNode, ASTAmbiguous, ASTAndNode, ASTAnnotatedStatement, ASTAnnotation, ASTArguments, ASTAssignment, ASTBitwiseAndNode, ASTBitwiseComplNode, ASTBitwiseOrNode, ASTBitwiseXorNode, ASTBreak, ASTCaseStatement, ASTConstructorNode, ASTContinue, ASTDecrementGetNode, ASTDefineVars, ASTDivNode, ASTDoWhileStatement, ASTEmptyFunction, ASTEQNode, ASTEQSNode, ASTERNode, ASTEWNode, ASTExtendedLiteral, ASTFalseNode, ASTFunctionNode, ASTGENode, ASTGetDecrementNode, ASTGetIncrementNode, ASTGTNode, ASTIdentifier, ASTIdentifierAccess, ASTIfStatement, ASTIncrementGetNode, ASTInstanceOf, ASTJxltLiteral, ASTLENode, ASTLTNode, ASTMapEntry, ASTMethodNode, ASTModNode, ASTMulNode, ASTNENode, ASTNESNode, ASTNEWNode, ASTNotInstanceOf, ASTNotNode, ASTNRNode, ASTNSWNode, ASTNullLiteral, ASTNullpNode, ASTNumberLiteral, ASTOrNode, ASTQualifiedIdentifier, ASTRangeNode, ASTReference, ASTReferenceExpression, ASTRegexLiteral, ASTReturnStatement, ASTSetAddNode, ASTSetAndNode, ASTSetDivNode, ASTSetModNode, ASTSetMultNode, ASTSetOrNode, ASTSetShiftLeftNode, ASTSetShiftRightNode, ASTSetShiftRightUnsignedNode, ASTSetSubNode, ASTSetXorNode, ASTShiftLeftNode, ASTShiftRightNode, ASTShiftRightUnsignedNode, ASTSizeFunction, ASTStringLiteral, ASTSubNode, ASTSwitchStatement, ASTSWNode, ASTTernaryNode, ASTThrowStatement, ASTTrueNode, ASTUnaryMinusNode, ASTUnaryPlusNode, ASTWhileStatement, ExtensibleNode, JexlLexicalNode

public abstract class JexlNode
extends SimpleNode
implements JexlCache.Reference

Base class for parser nodes - holds an 'image' of the token for later use.

Since:

2.0

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	JexlNode.Constant<T>	A marker interface for constants.
static interface	JexlNode.Funcall	Marker interface for cachable function calls.
static class	JexlNode.Info	An info bound to its node.
static interface	JexlNode.JxltHandle	Marker interface for nodes hosting a JxltExpression.

Field Summary

Fields

Modifier and Type	Field	Description
private int	lc
private static long	serialVersionUID

Fields inherited from class org.apache.commons.jexl3.parser.SimpleNode

id

Constructor Summary

Constructors

Constructor	Description
JexlNode(int id)
JexlNode(Parser p, int id)	Deprecated. Use JexlNode(int).

Method Summary

Modifier and Type	Method	Description
void	clearCache()	Clears any cached value of type JexlProperty{G,S}et or JexlMethod.
java.lang.Object	getCache()	Gets the referenced object.
int	getColumn()
int	getLine()
boolean	isConstant()	Tests whether this node is a constant node.
protected boolean	isConstant(boolean literal)
boolean	isGlobalVar()
boolean	isLeftValue()	Tests whether this node is a left value.
boolean	isSafeLhs(boolean safe)	Tests whether this node is the left-hand side of a safe access identifier as in.
boolean	isStrictOperator(JexlArithmetic arithmetic)	Checks whether this node is an operator that accepts a null argument even when arithmetic is in strict mode.
JexlInfo	jexlInfo()	Gets the associated JexlInfo instance.
JexlInfo	jexlInfo(java.lang.String name)	Gets the associated JexlInfo instance.
void	jjtSetFirstToken(Token t)
void	jjtSetLastToken(Token t)
void	setCache(java.lang.Object cache)	Sets the referenced object.

Methods inherited from class org.apache.commons.jexl3.parser.SimpleNode

childrenAccept, dump, dumpOut, getId, jjtAccept, jjtAddChild, jjtClose, jjtGetChild, jjtGetNumChildren, jjtGetParent, jjtGetValue, jjtOpen, jjtSetChildren, jjtSetParent, jjtSetValue, toString, toString

Methods inherited from class java.lang.Object

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

Field Detail

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

lc

private int lc

Constructor Detail

JexlNode

public JexlNode(int id)

JexlNode

@Deprecated
public JexlNode(Parser p,
                int id)

Deprecated.

Use JexlNode(int).

Constructs a new instance.

Parameters:

p - not used.

id - the node type identifier

Method Detail

getCache

public java.lang.Object getCache()

Description copied from interface: JexlCache.Reference

Gets the referenced object.

Specified by:

getCache in interface JexlCache.Reference

Returns:

the referenced object

setCache

public void setCache(java.lang.Object cache)

Description copied from interface: JexlCache.Reference

Sets the referenced object.

Specified by:

setCache in interface JexlCache.Reference

Parameters:

cache - the referenced object

clearCache

public void clearCache()

Clears any cached value of type JexlProperty{G,S}et or JexlMethod.

This is called when the engine detects the evaluation of a script occurs with a class loader different that the one that created it.

getColumn

public int getColumn()

getLine

public int getLine()

isConstant

public boolean isConstant()

Tests whether this node is a constant node.

Its value cannot change after the first evaluation and can be cached indefinitely.

Returns:

true if constant, false otherwise

isConstant

protected boolean isConstant(boolean literal)

isGlobalVar

public boolean isGlobalVar()

Returns:

true if this node looks like a global var

isLeftValue

public boolean isLeftValue()

Tests whether this node is a left value.

Returns:

true if node is assignable, false otherwise

isSafeLhs

public boolean isSafeLhs(boolean safe)

Tests whether this node is the left-hand side of a safe access identifier as in. For instance, in 'x?.y' , 'x' is safe.

Parameters:

safe - whether the engine is in safe-navigation mode

Returns:

true if safe lhs, false otherwise

isStrictOperator

public boolean isStrictOperator(JexlArithmetic arithmetic)

Checks whether this node is an operator that accepts a null argument even when arithmetic is in strict mode. The default cases are equals and not equals.

Parameters:

arithmetic - the node to test

Returns:

true if node accepts null arguments, false otherwise

jexlInfo

public JexlInfo jexlInfo()

Gets the associated JexlInfo instance.

Returns:

the info

jexlInfo

public JexlInfo jexlInfo(java.lang.String name)

Gets the associated JexlInfo instance.

Parameters:

name - the source name

Returns:

the info

jjtSetFirstToken

public void jjtSetFirstToken(Token t)

jjtSetLastToken

public void jjtSetLastToken(Token t)