de.odysseus.el.tree.impl.ast
Class AstProperty

java.lang.Object
  de.odysseus.el.tree.impl.ast.AstNode
      de.odysseus.el.tree.impl.ast.AstProperty

All Implemented Interfaces:

ExpressionNode, Node

Direct Known Subclasses:

AstBracket, AstDot

public abstract class AstProperty
extends AstNode

Constructor Summary

AstProperty(AstNode prefix, boolean lvalue, boolean strict)

Method Summary

java.lang.Object	eval(Bindings bindings, ELContext context)
AstNode	getChild(int i) Get i'th child
MethodInfo	getMethodInfo(Bindings bindings, ELContext context, java.lang.Class<?> returnType, java.lang.Class<?>[] paramTypes) Get method information.
protected abstract java.lang.Object	getProperty(Bindings bindings, ELContext context)
java.lang.Class<?>	getType(Bindings bindings, ELContext context) Get the value type accepted in ExpressionNode.setValue(Bindings, ELContext, Object).
java.lang.Object	invoke(Bindings bindings, ELContext context, java.lang.Class<?> returnType, java.lang.Class<?>[] paramTypes, java.lang.Object[] paramValues) Invoke method.
boolean	isLeftValue()
boolean	isLiteralText()
boolean	isReadOnly(Bindings bindings, ELContext context) Determine whether ExpressionNode.setValue(Bindings, ELContext, Object) will throw a PropertyNotWritableException.
void	setValue(Bindings bindings, ELContext context, java.lang.Object value) Assign value.

Methods inherited from class de.odysseus.el.tree.impl.ast.AstNode

appendStructure, getStructuralId, getValue

Methods inherited from class java.lang.Object

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

Methods inherited from interface de.odysseus.el.tree.Node

getCardinality

Constructor Detail

AstProperty

public AstProperty(AstNode prefix,
                   boolean lvalue,
                   boolean strict)

Method Detail

getProperty

protected abstract java.lang.Object getProperty(Bindings bindings,
                                                ELContext context)
                                         throws ELException

Throws:

ELException

eval

public final java.lang.Object eval(Bindings bindings,
                                   ELContext context)

Specified by:

eval in class AstNode

isLiteralText

public final boolean isLiteralText()

Returns:

true if this node represents literal text

isLeftValue

public final boolean isLeftValue()

Returns:

true if the subtree rooted at this node could be used as an lvalue expression (identifier or property sequence with non-literal proefix).

getType

public final java.lang.Class<?> getType(Bindings bindings,
                                        ELContext context)

Description copied from interface: ExpressionNode

Get the value type accepted in ExpressionNode.setValue(Bindings, ELContext, Object).

Parameters:

bindings - bindings containing variables and functions

context - evaluation context

Returns:

accepted type or null for non-lvalue nodes

isReadOnly

public final boolean isReadOnly(Bindings bindings,
                                ELContext context)
                         throws ELException

Description copied from interface: ExpressionNode

Determine whether ExpressionNode.setValue(Bindings, ELContext, Object) will throw a PropertyNotWritableException.

Parameters:

bindings - bindings containing variables and functions

context - evaluation context

Returns:

true if this a read-only expression node

Throws:

ELException

setValue

public final void setValue(Bindings bindings,
                           ELContext context,
                           java.lang.Object value)
                    throws ELException

Description copied from interface: ExpressionNode

Assign value.

Parameters:

bindings - bindings containing variables and functions

context - evaluation context

value - value to set

Throws:

ELException

getMethodInfo

public final MethodInfo getMethodInfo(Bindings bindings,
                                      ELContext context,
                                      java.lang.Class<?> returnType,
                                      java.lang.Class<?>[] paramTypes)

Description copied from interface: ExpressionNode

Get method information. If this is a non-lvalue node, answer null.

Parameters:

bindings - bindings containing variables and functions

context - evaluation context

returnType - expected method return type (may be null meaning don't care)

paramTypes - expected method argument types

Returns:

method information or null

invoke

public final java.lang.Object invoke(Bindings bindings,
                                     ELContext context,
                                     java.lang.Class<?> returnType,
                                     java.lang.Class<?>[] paramTypes,
                                     java.lang.Object[] paramValues)

Description copied from interface: ExpressionNode

Invoke method.

Parameters:

bindings - bindings containing variables and functions

context - evaluation context

returnType - expected method return type (may be null meaning don't care)

paramTypes - expected method argument types

paramValues - parameter values

Returns:

result of the method invocation

getChild

public AstNode getChild(int i)

Description copied from interface: Node

Get i'th child