Package ognl
Interface Node
- All Superinterfaces:
JavaSource
- All Known Implementing Classes:
ASTAnd
,ASTChain
,ASTConst
,ASTCtor
,ASTInstanceof
,ASTList
,ASTMethod
,ASTOr
,ASTProperty
,ASTRootVarRef
,ASTSequence
,ASTStaticField
,ASTStaticMethod
,ASTThisVarRef
,ASTVarRef
,BooleanExpression
,ComparisonExpression
,ExpressionNode
,NumericExpression
,SimpleNode
JJTree interface for AST nodes, as modified to handle the OGNL operations getValue and
setValue. JJTree's original comment:
All AST nodes must implement this interface. It provides basic
machinery for constructing the parent and child relationships
between nodes.
- Author:
- Luke Blanshard (blanshlu@netscape.net), Drew Davidson (drew@ognl.org)
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Method Summary
Modifier and TypeMethodDescriptionGets the compiled bytecode enhanced expression accessor for getting/setting values.getValue
(OgnlContext context, Object source) Extracts the value from the given source object that is appropriate for this node within the given context.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.jjtGetChild
(int i) This method returns a child node.int
Return the number of children the node has.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
setAccessor
(ExpressionAccessor accessor) Sets a new compiled accessor for this node expression.void
setValue
(OgnlContext context, Object target, Object value) Sets the given value in the given target as appropriate for this node within the given context.Methods inherited from interface ognl.JavaSource
toGetSourceString, toSetSourceString
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Method Details
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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
This pair of methods are used to inform the node of its parent. -
jjtGetParent
Node jjtGetParent() -
jjtAddChild
This method tells the node to add its argument to the node's list of children. -
jjtGetChild
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. -
getValue
Extracts the value from the given source object that is appropriate for this node within the given context.- Throws:
OgnlException
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setValue
Sets the given value in the given target as appropriate for this node within the given context.- Throws:
OgnlException
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getAccessor
ExpressionAccessor getAccessor()Gets the compiled bytecode enhanced expression accessor for getting/setting values.- Returns:
- The accessor for this node, or null if none has been compiled for it.
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setAccessor
Sets a new compiled accessor for this node expression.- Parameters:
accessor
- The compiled representation of this node.
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