uk.ac.ed.epcc.safe.accounting.expr

Class LabelPropExpression<T,R>

java.lang.Object

uk.ac.ed.epcc.safe.accounting.expr.LabelPropExpression<T,R>

Type Parameters:

T - Type of nested expression

R - Return type of labeller

All Implemented Interfaces:

PropExpression<R>, uk.ac.ed.epcc.webapp.Targetted<R>

public class LabelPropExpression<T,R>
extends java.lang.Object
implements PropExpression<R>

A PropExpression that maps a nested expression to a String using a Labeller

Author:

spb

Constructor Summary

Constructors

Constructor and Description
LabelPropExpression(uk.ac.ed.epcc.webapp.content.Labeller<T,R> labeller, PropExpression<T> expr)

Method Summary

Methods

Modifier and Type	Method and Description
<X> X	accept(BasePropExpressionVisitor<X> vis) Visitor pattern.
PropExpression<R>	copy() Generate an equivalent (and where possible immutable) copy of this expression.
boolean	equals(java.lang.Object obj)
PropExpression<T>	getExpr()
uk.ac.ed.epcc.webapp.content.Labeller<T,R>	getLabeller()
java.lang.Class<? super R>	getTarget()
int	hashCode()
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

LabelPropExpression

public LabelPropExpression(uk.ac.ed.epcc.webapp.content.Labeller<T,R> labeller,
                   PropExpression<T> expr)

Method Detail

getTarget

public java.lang.Class<? super R> getTarget()

Specified by:

getTarget in interface uk.ac.ed.epcc.webapp.Targetted<R>

accept

public <X> X accept(BasePropExpressionVisitor<X> vis)
         throws java.lang.Exception

Description copied from interface: PropExpression

Visitor pattern. Have the BasePropExpressionVisitor visit this expression

Specified by:

accept in interface PropExpression<R>

Throws:

java.lang.Exception

Type Parameters:

X - type of return

Parameters:

vis - visitor

Returns:

result of type R

copy

public PropExpression<R> copy()

Description copied from interface: PropExpression

Generate an equivalent (and where possible immutable) copy of this expression. Most implementing types should themselves be immutable, calling copy on their arguments and returning a self-reference for copy. In this case the return type of the function should be narrowed to the implemeting sub-type.

Specified by:

copy in interface PropExpression<R>

Returns:

PropExpression

getLabeller

public uk.ac.ed.epcc.webapp.content.Labeller<T,R> getLabeller()

getExpr

public PropExpression<T> getExpr()

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object