com.atlassian.query.operand

Class EmptyOperand

java.lang.Object

com.atlassian.query.operand.EmptyOperand

All Implemented Interfaces:

Operand

public class EmptyOperand
extends Object
implements Operand

Used to represent a value that has not been set for a field.

Since:

v4.0

Field Summary

Fields

Modifier and Type	Field and Description
static EmptyOperand	EMPTY
static String	OPERAND_NAME

Constructor Summary

Constructors

Constructor and Description
EmptyOperand()

Method Summary

Methods

Modifier and Type	Method and Description
<R> R	accept(OperandVisitor<R> visitor) Allows us to perform operations over the operand based on the passed in visitor.
boolean	equals(Object o)
String	getDisplayString() Produces the unexpanded representation of the Operand.
String	getName() The name that represents this Operand.
int	hashCode()

Methods inherited from class java.lang.Object

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

Field Detail

OPERAND_NAME

public static final String OPERAND_NAME

See Also:

Constant Field Values

EMPTY

public static final EmptyOperand EMPTY

Constructor Detail

EmptyOperand

public EmptyOperand()

Method Detail

getName

public String getName()

Description copied from interface: Operand

The name that represents this Operand.

Specified by:

getName in interface Operand

Returns:

the name of the operand, null if the operand is unnamed. If an operand is unnamed then it likely represents literal values (such as Strings or Longs).

getDisplayString

public String getDisplayString()

Description copied from interface: Operand

Produces the unexpanded representation of the Operand. In the case of a function operand this would be the function as represented in the Query (i.e. group(jira-users)).

Specified by:

getDisplayString in interface Operand

Returns:

a string that represents this operand as represented in the JQL query string.

accept

public <R> R accept(OperandVisitor<R> visitor)

Description copied from interface: Operand

Allows us to perform operations over the operand based on the passed in visitor. This method calls the visit method on the visitor with this reference.

Specified by:

accept in interface Operand

Type Parameters:

R - the return type for the visitor.

Parameters:

visitor - the visitor to accept.

Returns:

the result of the visit operation who's type is specified by the incomming visitor.

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object