ognl

Class ASTChain

java.lang.Object

ognl.SimpleNode

ognl.ASTChain

All Implemented Interfaces:

Serializable, OrderedReturn, JavaSource, Node, NodeType

public class ASTChain
extends SimpleNode
implements NodeType, OrderedReturn

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
ASTChain(int id)
ASTChain(OgnlParser p, int id)

Method Summary

Methods

Modifier and Type	Method and Description
String	getCoreExpression() Get the core expression to execute first before any return foo logic is started.
Class	getGetterClass() The type returned from the expression - if any.
String	getLastExpression() Gets the last expression to be pre-pended with a return <expression> block.
Class	getSetterClass() The type used to set the value - if any.
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	isChain(OgnlContext context)
boolean	isSimpleNavigationChain(OgnlContext context)
void	jjtClose() This method is called after all the child nodes have been added.
protected void	setValueBody(OgnlContext context, Object target, Object value) Subclasses implement this method to do the actual work of setting the appropriate value in the target object.
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, isConstant, isEvalChain, isNodeConstant, isNodeSimpleProperty, isOperation, isSequence, isSimpleMethod, isSimpleProperty, jjtAddChild, jjtGetChild, jjtGetNumChildren, jjtGetParent, jjtOpen, jjtSetParent, lastChild, setAccessor, setValue, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

ASTChain

public ASTChain(int id)

ASTChain

public ASTChain(OgnlParser p,
        int id)

Method Detail

getLastExpression

public String getLastExpression()

Description copied from interface: OrderedReturn

Gets the last expression to be pre-pended with a return <expression> block.

Specified by:

getLastExpression in interface OrderedReturn

Returns:

The expression representing the return portion of a statement;

getCoreExpression

public String getCoreExpression()

Description copied from interface: OrderedReturn

Get the core expression to execute first before any return foo logic is started.

Specified by:

getCoreExpression in interface OrderedReturn

Returns:

The core standalone expression that shouldn't be pre-pended with a return keyword.

jjtClose

public void jjtClose()

Description copied from interface: Node

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

Specified by:

jjtClose in interface Node

Overrides:

jjtClose in class SimpleNode

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.

setValueBody

protected void setValueBody(OgnlContext context,
                Object target,
                Object value)
                     throws OgnlException

Description copied from class: SimpleNode

Subclasses implement this method to do the actual work of setting the appropriate value in the target object. The default implementation throws an InappropriateExpressionException, meaning that it cannot be a set expression.

Overrides:

setValueBody in class SimpleNode

Parameters:

context - the OgnlContext within which to perform the operation.

target - the Object upon which to set the value body.

value - the Object representing the value body to apply to the target.

Throws:

OgnlException - if the value body set fails.

isSimpleNavigationChain

public boolean isSimpleNavigationChain(OgnlContext context)
                                throws OgnlException

Overrides:

isSimpleNavigationChain in class SimpleNode

Throws:

OgnlException

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.

isChain

public boolean isChain(OgnlContext context)

Overrides:

isChain in class SimpleNode