Class JspMethodExpression

java.lang.Object

jakarta.el.Expression

jakarta.el.MethodExpression

org.apache.jasper.el.JspMethodExpression

All Implemented Interfaces:

Externalizable, Serializable

public final class JspMethodExpression
extends MethodExpression
implements Externalizable

Wrapper around a MethodExpression that adds JSP-specific error tracking with marks. Implements Externalizable for serialization support.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
JspMethodExpression()	Default constructor required by Externalizable.
JspMethodExpression(String mark, MethodExpression target)	Creates a new JspMethodExpression wrapping the given target expression.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object obj)
String	getExpressionString()	Returns the original string representation of this EL expression as it was parsed.
MethodInfo	getMethodInfo(ELContext context)	Returns information about the method that this expression resolves to.
MethodReference	getMethodReference(ELContext context)	Obtain the MethodReference for the method to which this method expression resolves.
int	hashCode()
Object	invoke(ELContext context, Object[] params)	Invokes the method that this expression resolves to with the given parameters.
boolean	isLiteralText()	Returns whether this expression is a literal text expression, meaning it does not contain any variables, functions, or operators and evaluates to a constant value.
boolean	isParametersProvided()	Returns whether the parameters for the method invocation are provided by the expression or by the container.
void	readExternal(ObjectInput in)
void	writeExternal(ObjectOutput out)

Methods inherited from class Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Details

JspMethodExpression

public JspMethodExpression()

Default constructor required by Externalizable.

JspMethodExpression

public JspMethodExpression(String mark,
 MethodExpression target)

Creates a new JspMethodExpression wrapping the given target expression.

Parameters:

mark - the mark for error tracking

target - the underlying MethodExpression to wrap

Method Details

getMethodInfo

public MethodInfo getMethodInfo(ELContext context)
                         throws NullPointerException,
PropertyNotFoundException,
MethodNotFoundException,
ELException

Description copied from class: jakarta.el.MethodExpression

Returns information about the method that this expression resolves to.

Specified by:

getMethodInfo in class MethodExpression

Parameters:

context - The EL context for this evaluation

Returns:

Information about the method that this expression resolves to

Throws:

NullPointerException - If the supplied context is null

PropertyNotFoundException - If a property/variable resolution failed because no match was found or a match was found but was not readable

MethodNotFoundException - If no matching method can be found

ELException - Wraps any exception throw whilst resolving the property

invoke

public Object invoke(ELContext context,
 Object[] params)
              throws NullPointerException,
PropertyNotFoundException,
MethodNotFoundException,
ELException

Description copied from class: jakarta.el.MethodExpression

Invokes the method that this expression resolves to with the given parameters.

Specified by:

invoke in class MethodExpression

Parameters:

context - The EL context for this evaluation

params - The parameters with which to invoke this method expression

Returns:

The result of invoking this method expression

Throws:

NullPointerException - If the supplied context is null

PropertyNotFoundException - If a property/variable resolution failed because no match was found or a match was found but was not readable

MethodNotFoundException - If no matching method can be found

ELException - Wraps any exception throw whilst resolving the property or coercion of the result to the expected return type fails

getMethodReference

public MethodReference getMethodReference(ELContext context)

Description copied from class: jakarta.el.MethodExpression

Obtain the MethodReference for the method to which this method expression resolves.

Overrides:

getMethodReference in class MethodExpression

Parameters:

context - The EL context for this evaluation

Returns:

This default implementation always returns null

isParametersProvided

public boolean isParametersProvided()

Description copied from class: jakarta.el.MethodExpression

Returns whether the parameters for the method invocation are provided by the expression or by the container.

Overrides:

isParametersProvided in class MethodExpression

Returns:

This default implementation always returns false

equals

public boolean equals(Object obj)

Specified by:

equals in class Expression

hashCode

public int hashCode()

Specified by:

hashCode in class Expression

getExpressionString

public String getExpressionString()

Description copied from class: jakarta.el.Expression

Returns the original string representation of this EL expression as it was parsed.

Specified by:

getExpressionString in class Expression

Returns:

the string representation of this expression

isLiteralText

public boolean isLiteralText()

Description copied from class: jakarta.el.Expression

Returns whether this expression is a literal text expression, meaning it does not contain any variables, functions, or operators and evaluates to a constant value.

Specified by:

isLiteralText in class Expression

Returns:

true if this expression is a literal text, false otherwise

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Specified by:

writeExternal in interface Externalizable

Throws:

IOException

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
ClassNotFoundException

Specified by:

readExternal in interface Externalizable

Throws:

IOException

ClassNotFoundException