Class JspMethodExpression

java.lang.Object

javax.el.Expression

javax.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()
MethodInfo	getMethodInfo(ELContext context)
int	hashCode()
Object	invoke(ELContext context, Object[] params)
boolean	isLiteralText()
boolean	isParametersProvided()
void	readExternal(ObjectInput in)
void	writeExternal(ObjectOutput out)

Methods inherited from class MethodExpression

isParmetersProvided

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

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

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

isParametersProvided

public boolean isParametersProvided()

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()

Specified by:

getExpressionString in class Expression

isLiteralText

public boolean isLiteralText()

Specified by:

isLiteralText in class Expression

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