org.apache.el.parser
Interface Node

All Known Implementing Classes:

ArithmeticNode, AstAnd, AstBracketSuffix, AstChoice, AstCompositeExpression, AstDeferredExpression, AstDiv, AstDotSuffix, AstDynamicExpression, AstEmpty, AstEqual, AstFalse, AstFloatingPoint, AstFunction, AstGreaterThan, AstGreaterThanEqual, AstIdentifier, AstInteger, AstLessThan, AstLessThanEqual, AstLiteralExpression, AstMethodParameters, AstMinus, AstMod, AstMult, AstNegative, AstNot, AstNotEqual, AstNull, AstOr, AstPlus, AstString, AstTrue, AstValue, BooleanNode, SimpleNode

public interface Node

Author:

Jacob Hookom [jacob@hookom.net] $Id: Node.java 898969 2010-01-13 22:10:49Z markt $

Method Summary

void	accept(NodeVisitor visitor)
String	getImage()
MethodInfo	getMethodInfo(EvaluationContext ctx, Class<?>[] paramTypes)
Class<?>	getType(EvaluationContext ctx)
Object	getValue(EvaluationContext ctx)
ValueReference	getValueReference(EvaluationContext ctx)
Object	invoke(EvaluationContext ctx, Class<?>[] paramTypes, Object[] paramValues)
boolean	isParametersProvided()
boolean	isReadOnly(EvaluationContext ctx)
void	jjtAddChild(Node n, int i) This method tells the node to add its argument to the node's list of children.
void	jjtClose() This method is called after all the child nodes have been added.
Node	jjtGetChild(int i) This method returns a child node.
int	jjtGetNumChildren() Return the number of children the node has.
Node	jjtGetParent()
void	jjtOpen() This method is called after the node has been made the current node.
void	jjtSetParent(Node n) This pair of methods are used to inform the node of its parent.
void	setValue(EvaluationContext ctx, Object value)

Method Detail

jjtOpen

void jjtOpen()

This method is called after the node has been made the current node. It indicates that child nodes can now be added to it.

jjtClose

void jjtClose()

This method is called after all the child nodes have been added.

jjtSetParent

void jjtSetParent(Node n)

This pair of methods are used to inform the node of its parent.

jjtGetParent

Node jjtGetParent()

jjtAddChild

void jjtAddChild(Node n,
                 int i)

This method tells the node to add its argument to the node's list of children.

jjtGetChild

Node jjtGetChild(int i)

This method returns a child node. The children are numbered from zero, left to right.

jjtGetNumChildren

int jjtGetNumChildren()

Return the number of children the node has.

getImage

String getImage()

getValue

Object getValue(EvaluationContext ctx)
                throws ELException

Throws:

ELException

setValue

void setValue(EvaluationContext ctx,
              Object value)
              throws ELException

Throws:

ELException

getType

Class<?> getType(EvaluationContext ctx)
                 throws ELException

Throws:

ELException

isReadOnly

boolean isReadOnly(EvaluationContext ctx)
                   throws ELException

Throws:

ELException

accept

void accept(NodeVisitor visitor)
            throws Exception

Throws:

Exception

getMethodInfo

MethodInfo getMethodInfo(EvaluationContext ctx,
                         Class<?>[] paramTypes)
                         throws ELException

Throws:

ELException

invoke

Object invoke(EvaluationContext ctx,
              Class<?>[] paramTypes,
              Object[] paramValues)
              throws ELException

Throws:

ELException

getValueReference

ValueReference getValueReference(EvaluationContext ctx)

Since:

EL 2.2

isParametersProvided

boolean isParametersProvided()

Since:

EL 2.2