ognl

Class ExpressionNode

java.lang.Object

ognl.SimpleNode

ognl.ExpressionNode

All Implemented Interfaces:

Serializable, JavaSource, Node

Direct Known Subclasses:

ASTTest, BooleanExpression, NumericExpression

public abstract class ExpressionNode
extends SimpleNode

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
ExpressionNode(int i)
ExpressionNode(OgnlParser p, int i)

Method Summary

Methods

Modifier and Type	Method and Description
String	getExpressionOperator(int index)
boolean	isConstant(OgnlContext context)
boolean	isNodeConstant(OgnlContext context) Returns true iff this node is constant without respect to the children.
boolean	isOperation(OgnlContext context)
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, getValueBody, isChain, isEvalChain, isNodeSimpleProperty, 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

ExpressionNode

public ExpressionNode(int i)

ExpressionNode

public ExpressionNode(OgnlParser p,
              int i)

Method Detail

isNodeConstant

public boolean isNodeConstant(OgnlContext context)
                       throws OgnlException

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.

isConstant

public boolean isConstant(OgnlContext context)
                   throws OgnlException

Overrides:

isConstant in class SimpleNode

Throws:

OgnlException

getExpressionOperator

public String getExpressionOperator(int index)

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.

isOperation

public boolean isOperation(OgnlContext context)
                    throws OgnlException

Overrides:

isOperation in class SimpleNode

Throws:

OgnlException