ognl

Class ASTConst

java.lang.Object

ognl.SimpleNode

ognl.ASTConst

All Implemented Interfaces:

Serializable, JavaSource, Node, NodeType

public class ASTConst
extends SimpleNode
implements NodeType

Author:

Luke Blanshard (blanshlu@netscape.net), Drew Davidson (drew@ognl.org)

See Also:

Serialized Form

Field Summary

Fields inherited from class ognl.SimpleNode

_children, _id, _parent, _parser

Constructor Summary

Constructors

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

Method Summary

Methods

Modifier and Type	Method and Description
Class	getGetterClass() The type returned from the expression - if any.
Class	getSetterClass() The type used to set the value - if any.
Object	getValue()
protected Object	getValueBody(OgnlContext context, 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(Object value) Called from parser actions.
String	toGetSourceString(OgnlContext context, 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.
String	toSetSourceString(OgnlContext context, 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.
String	toString()

Methods inherited from class ognl.SimpleNode

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

Methods inherited from class java.lang.Object

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

Constructor Detail

ASTConst

public ASTConst(int id)

ASTConst

public ASTConst(OgnlParser p,
        int id)

Method Detail

setValue

public void setValue(Object value)

Called from parser actions.

Parameters:

value - the Object representing the value.

getValue

public Object getValue()

getValueBody

protected Object getValueBody(OgnlContext context,
                  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

Parameters:

context - the OgnlContext within which to perform the operation.

source - the Object from which to get the value body.

Returns:

the value body from the source (as appropriate within the provided context).

Throws:

OgnlException - if the value body get fails.

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

Parameters:

context - the OgnlContext within which to perform the operation.

Returns:

true if this node is a constant, false otherwise.

Throws:

OgnlException - if the check fails.

getGetterClass

public 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 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.

toString

public String toString()

Overrides:

toString in class SimpleNode

toGetSourceString

public String toGetSourceString(OgnlContext context,
                       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

Parameters:

context - the OgnlContext within which to perform the operation.

target - the Object from which to retrieve the get source string.

Returns:

Literal java string representation of an object get.

toSetSourceString

public String toSetSourceString(OgnlContext context,
                       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

Parameters:

context - the OgnlContext within which to perform the operation.

target - the Object from which to retrieve the set source string.

Returns:

Literal java string representation of an object set.