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• javax.servlet.jsp.el: Javadoc index of package javax.servlet.jsp.el.


Package Samples:

• javax.servlet.jsp.el: Classes and interfaces for the Core JSP 2.0 API.  

Classes:

• ExpressionEvaluator: The abstract base class for an expression-language evaluator. Classes that implement an expression language expose their functionality via this abstract class. An instance of the ExpressionEvaluator can be obtained via the JspContext / PageContext The parseExpression() and evaluate() methods must be thread-safe. That is, multiple threads may call these methods on the same ExpressionEvaluator object simultaneously. Implementations should synchronize access if they depend on transient state. Implementations should not, however, assume that only one object of each ExpressionEvaluator type will be ...
• VariableResolver: This class is used to customize the way an ExpressionEvaluator resolves variable references at evaluation time. For example, instances of this class can implement their own variable lookup mechanisms, or introduce the notion of "implicit variables" which override any other variables. An instance of this class should be passed when evaluating an expression. An instance of this class includes the context against which resolution will happen
• Expression: The abstract class for a prepared expression. An instance of an Expression can be obtained via from an ExpressionEvaluator instance. An Expression may or not have done a syntactic parse of the expression. A client invoking the evaluate() method should be ready for the case where ELParseException exceptions are raised.
• FunctionMapper: The interface to a map between EL function names and methods. Classes implementing this interface may, for instance, consult tag library information to resolve the map.
• ELException: Represents any of the exception conditions that arise during the operation evaluation of the evaluator.
• ELParseException: Represents a parsing error encountered while parsing an EL expression.

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