| de.odysseus.el.tree.ExpressionNode
All known Subclasses: de.odysseus.el.tree.impl.ast.AstNode,
| ExpressionNode | | public interface ExpressionNode extends Node(Code) | | Expression node interface.
This interface provides all the methods needed for value expressions and method
expressions.
See Also: de.odysseus.el.tree.Tree
author:
Christoph Beck |
| Method Summary | |
| public MethodInfo | getMethodInfo(Bindings bindings, ELContext context, Class returnType, Class[] paramTypes)
Get method information. | | public String | getStructuralId(Bindings bindings)
Get the canonical expression string for this node. | | public Class | getType(Bindings bindings, ELContext context)
Get the value type accepted in
ExpressionNode.setValue(Bindings,ELContext,Object) . | | public Object | getValue(Bindings bindings, ELContext context, Class expectedType)
Evaluate node. | | public Object | invoke(Bindings bindings, ELContext context, Class returnType, Class[] paramTypes, Object[] paramValues)
Invoke method. | | public boolean | isLeftValue()
| | public boolean | isLiteralText()
| | public boolean | isReadOnly(Bindings bindings, ELContext context)
Determine whether
ExpressionNode.setValue(Bindings,ELContext,Object) will throw a
javax.el.PropertyNotWritableException . | | public void | setValue(Bindings bindings, ELContext context, Object value)
Assign value. |
| getMethodInfo | | public MethodInfo getMethodInfo(Bindings bindings, ELContext context, Class returnType, Class[] paramTypes)(Code) | | Get method information.
If this is a non-lvalue node, answer null.
Parameters:
bindings - bindings containing variables and functions
Parameters:
context - evaluation context
Parameters:
returnType - expected method return type (may be null meaning don't care)
Parameters:
paramTypes - expected method argument types method information or null |
| getStructuralId | | public String getStructuralId(Bindings bindings)(Code) | | Get the canonical expression string for this node.
Variable and funtion names will be replaced in a way such that two expression
nodes that have the same node structure and bindings will also answer the same
value here.
For example, "${foo:bar()+2*foobar}" may lead to
"${<fn>() + 2 * <var>}" if foobar is a bound variable.
Otherwise, the structural id would be "${<fn>() + 2 * foobar}".
If the bindings is null, the full canonical subexpression is returned.
|
| getValue | | public Object getValue(Bindings bindings, ELContext context, Class expectedType)(Code) | | Evaluate node.
Parameters:
bindings - bindings containing variables and functions
Parameters:
context - evaluation context
Parameters:
expectedType - result type evaluated node, coerced to the expected type |
| invoke | | public Object invoke(Bindings bindings, ELContext context, Class returnType, Class[] paramTypes, Object[] paramValues)(Code) | | Invoke method.
Parameters:
bindings - bindings containing variables and functions
Parameters:
context - evaluation context
Parameters:
returnType - expected method return type (may be null meaning don't care)
Parameters:
paramTypes - expected method argument types
Parameters:
paramValues - parameter values result of the method invocation |
| isLeftValue | | public boolean isLeftValue()(Code) | | true if the subtree rooted at this node could be used asan lvalue expression (identifier or property sequence with non-literal proefix). |
| isLiteralText | | public boolean isLiteralText()(Code) | | true if this node represents literal text |
| setValue | | public void setValue(Bindings bindings, ELContext context, Object value)(Code) | | Assign value.
Parameters:
bindings - bindings containing variables and functions
Parameters:
context - evaluation context
Parameters:
value - value to set |
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