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

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

All Implemented Interfaces:

ExpressionNode, Node

public final class AstText
extends AstNode

Constructor Summary

AstText(java.lang.String value)

Method Summary

void	appendStructure(java.lang.StringBuilder b, Bindings bindings)
java.lang.Object	eval(Bindings bindings, ELContext context)
int	getCardinality() Get the node's number of children.
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.
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.
java.lang.String	toString()

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

getStructuralId, getValue

Methods inherited from class java.lang.Object

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

Constructor Detail

AstText

public AstText(java.lang.String value)

Method Detail

isLiteralText

public boolean isLiteralText()

Returns:

true if this node represents literal text

isLeftValue

public 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 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 boolean isReadOnly(Bindings bindings,
                          ELContext context)

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

setValue

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

Description copied from interface: ExpressionNode

Assign value.

Parameters:

bindings - bindings containing variables and functions

context - evaluation context

value - value to set

eval

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

Specified by:

eval in class AstNode

getMethodInfo

public 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 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

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

appendStructure

public void appendStructure(java.lang.StringBuilder b,
                            Bindings bindings)

Specified by:

appendStructure in class AstNode

getCardinality

public int getCardinality()

Description copied from interface: Node

Get the node's number of children.

getChild

public AstNode getChild(int i)

Description copied from interface: Node

Get i'th child