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

Class ExpressionTuple

java.lang.Object

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

public final class ExpressionTuple
extends java.lang.Object

A class representing a set of PropExpressions and associated values. This object is immutable and can be used to key Maps. like PropertyTuple but for expressions.

Author:

spb

Constructor Summary

Constructors

Constructor and Description
ExpressionTuple(java.util.Map<PropExpression,java.lang.Object> values)
ExpressionTuple(java.util.Set<PropExpression> keys, ExpressionTarget rec)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(java.lang.Object obj)
java.util.Set<PropExpression>	expressionSet()
<X> X	get(PropExpression<X> expr)
java.lang.Object	getKey() Get a table key from the PropertyTuple.
int	hashCode()

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpressionTuple

public ExpressionTuple(java.util.Map<PropExpression,java.lang.Object> values)

ExpressionTuple

public ExpressionTuple(java.util.Set<PropExpression> keys,
               ExpressionTarget rec)
                throws InvalidPropertyException

Throws:

InvalidPropertyException

Method Detail

expressionSet

public java.util.Set<PropExpression> expressionSet()

get

public <X> X get(PropExpression<X> expr)

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

getKey

public java.lang.Object getKey()

Get a table key from the PropertyTuple. If there is more than one property set the key is the propertyTuple itself. If there is a single property then return the value. This is to allow compound tables to be joined using different properties with the same value space.

Returns:

object.