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Java Source Code / Java Documentation » 6.0 JDK Core » Servlet API by tomcat » javax.servlet.jsp.el

Source Cross Reference

Class Diagram

Java Document (Java Doc)

java.lang .Object

javax.servlet.jsp.el .Expression

Expression

abstract public class Expression (Code)

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.

since:
2.0

Method Summary
abstract public Object	evaluate(VariableResolver vResolver) Evaluates an expression that was previously prepared.

Method Detail

evaluate
abstract public Object evaluate(VariableResolver vResolver) throws ELException(Code)
	Evaluates an expression that was previously prepared. In some implementations preparing an expression involves full syntactic validation, but others may not do so. Evaluating the expression may raise an ELParseException as well as other ELExceptions due to run-time evaluation. Parameters: vResolver - A VariableResolver instance that can be used at runtime to resolve the name of implicit objects into Objects. The result of the expression evaluation. exception: ELException - Thrown if the expression evaluation failed.

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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