Package org.apache.commons.ognl

Class ASTConst

java.lang.Object

org.apache.commons.ognl.SimpleNode

org.apache.commons.ognl.ASTConst

All Implemented Interfaces:

java.io.Serializable, JavaSource, Node, NodeType

public class ASTConst
extends SimpleNode
implements NodeType

$Id$

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
private java.lang.Class	getterClass
private java.lang.Object	value

Fields inherited from class org.apache.commons.ognl.SimpleNode

children, id, parent, parser

Constructor Summary

Constructors

Constructor	Description
ASTConst(int id)
ASTConst(OgnlParser p, int id)

Method Summary

Modifier and Type	Method	Description
<R,P> R	accept(NodeVisitor<? extends R,? super P> visitor, P data)	Supports the Visitor pattern.
java.lang.Class	getGetterClass()	The type returned from the expression - if any.
java.lang.Class	getSetterClass()	The type used to set the value - if any.
java.lang.Object	getValue()
protected java.lang.Object	getValueBody(OgnlContext context, java.lang.Object source)	Subclasses implement this method to do the actual work of extracting the appropriate value from the source object.
boolean	isNodeConstant(OgnlContext context)	Returns true iff this node is constant without respect to the children.
void	setValue(java.lang.Object value)	Called from parser actions.
java.lang.String	toGetSourceString(OgnlContext context, java.lang.Object target)	Expected to return a java source representation of itself such that it could be turned into a literal java expression to be compiled and executed for ExpressionAccessor.get(OgnlContext, Object) calls.
java.lang.String	toSetSourceString(OgnlContext context, java.lang.Object target)	Expected to return a java source representation of itself such that it could be turned into a literal java expression to be compiled and executed for ExpressionAccessor.get(OgnlContext, Object) calls.

Methods inherited from class org.apache.commons.ognl.SimpleNode

dump, evaluateGetValueBody, evaluateSetValueBody, flattenTree, getAccessor, getIndexInParent, getNextSibling, getValue, isConstant, isEvalChain, isNodeSimpleProperty, isSimpleNavigationChain, isSimpleProperty, jjtAddChild, jjtClose, jjtGetChild, jjtGetNumChildren, jjtGetParent, jjtOpen, jjtSetParent, lastChild, setAccessor, setValue, setValueBody, toString, toString

Methods inherited from class java.lang.Object

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

Field Detail

value

private java.lang.Object value

getterClass

private java.lang.Class getterClass

Constructor Detail

ASTConst

public ASTConst(int id)

ASTConst

public ASTConst(OgnlParser p,
                int id)

Method Detail

setValue

public void setValue(java.lang.Object value)

Called from parser actions.

Parameters:

value - the value to set

getValue

public java.lang.Object getValue()

getValueBody

protected java.lang.Object getValueBody(OgnlContext context,
                                        java.lang.Object source)
                                 throws OgnlException

Description copied from class: SimpleNode

Subclasses implement this method to do the actual work of extracting the appropriate value from the source object.

Specified by:

getValueBody in class SimpleNode

Throws:

OgnlException

isNodeConstant

public boolean isNodeConstant(OgnlContext context)
                       throws OgnlException

Description copied from class: SimpleNode

Returns true iff this node is constant without respect to the children.

Overrides:

isNodeConstant in class SimpleNode

Throws:

OgnlException

getGetterClass

public java.lang.Class getGetterClass()

Description copied from interface: NodeType

The type returned from the expression - if any.

Specified by:

getGetterClass in interface NodeType

Returns:

The type.

getSetterClass

public java.lang.Class getSetterClass()

Description copied from interface: NodeType

The type used to set the value - if any.

Specified by:

getSetterClass in interface NodeType

Returns:

The type.

toGetSourceString

public java.lang.String toGetSourceString(OgnlContext context,
                                          java.lang.Object target)

Description copied from interface: JavaSource

Expected to return a java source representation of itself such that it could be turned into a literal java expression to be compiled and executed for ExpressionAccessor.get(OgnlContext, Object) calls.

Specified by:

toGetSourceString in interface JavaSource

Overrides:

toGetSourceString in class SimpleNode

Returns:

Literal java string representation of an object get.

toSetSourceString

public java.lang.String toSetSourceString(OgnlContext context,
                                          java.lang.Object target)

Description copied from interface: JavaSource

Expected to return a java source representation of itself such that it could be turned into a literal java expression to be compiled and executed for ExpressionAccessor.get(OgnlContext, Object) calls.

Specified by:

toSetSourceString in interface JavaSource

Overrides:

toSetSourceString in class SimpleNode

Returns:

Literal java string representation of an object get.

accept

public <R,P> R accept(NodeVisitor<? extends R,? super P> visitor,
                            P data)
                     throws OgnlException

Description copied from interface: Node

Supports the Visitor pattern. The method which corresponds to the runtime type of this Node will be called.

Specified by:

accept in interface Node

Type Parameters:

R - The return type of the visitor.visit method.

P - The type of the second parameter type.

Parameters:

visitor - The visitor to accept.

data - The second parameter to pass through to visitor.visit

Returns:

the value returned by visitor.visit

Throws:

OgnlException