| java.lang.Object
 org.zkoss.xel.Expressions
| Expressions | | public class Expressions (Code) | | Utilities to use XEL.
author:
tomyeh
since:
3.0.0 |
| DUMMY_EXPRESSION | | final public static Expression DUMMY_EXPRESSION(Code) | | An dummy expression that does nothing.
It is usually used as a flag to denote exceptional cases.
It it serializable.
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| EMPTY_MAPPER | | final public static FunctionMapper EMPTY_MAPPER(Code) | | An empty function mapper, i.e., it has no function defined at all.
It is serializable.
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| EMPTY_RESOLVER | | final public static VariableResolver EMPTY_RESOLVER(Code) | | An empty variable resolver, i.e., it has no variable defined at all.
It is serializable.
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| evaluate | | final public static Object evaluate(XelContext ctx, String expression, Class expectedType) throws XelException(Code) | | Evaluates an expression.
Parameters:
ctx - the context information to evaluate the expressionIt can be null, in which case no functions are supported for thisinvocation.
Parameters:
expression - the expression to be evaluated.Note: the expression is enclosedwith ${ and }, regardingless what implemetnation is used.
Parameters:
expectedType - the expected type of the result of the evaluation |
| getExpressionFactoryClass | | final public static Class getExpressionFactoryClass()(Code) | | Returns the implementation of the expression factory that
is used by the whole system, or null to use the system default.
See Also: Expressions.setExpressionFactoryClass |
| setExpressionFactoryClass | | final public static void setExpressionFactoryClass(Class expfcls)(Code) | | Sets the implementation of the expression factory that shall
be used by the whole system, or null to use the system default.
Default: null - it means
org.zkoss.xel.el.ELFactory .
Note: you can only specify an implementation that is compatible
with JSP EL here, since all builtin pages depend on it.
Parameters:
expfcls - the implemtation class, or null to use the default.Note: expfcls must implement ExpressionFactory.If null, the system default is used. |
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