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com.clra.rowing
Class Attendance  

java.lang.Object
  com.clra.rowing.Attendance

All Implemented Interfaces:

java.io.Serializable

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public class Attendance

extends java.lang.Object

implements java.io.Serializable

Defines the possible attendance values for a participant in a rowing session.

Version:

$Id: Attendance.java,v 1.3 2003/02/26 03:38:45 rphall Exp $

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Field Summary
static Attendance	ABSENT
private  java.lang.String	name
static java.lang.String	NAME_ABSENT           Indicates that a signed-up participant did not show up for a practice, but either was not assigned, or was assigned but found a substitute.
static java.lang.String	NAME_PRESENT           Indicates that a participant showed up for a practice, regardless of whether participant was a signup, a substitute, or an extra.
static Attendance	PRESENT

 

Constructor Summary
protected	Attendance(java.lang.String name)

 

Method Summary
boolean	equals(java.lang.Object o)           Determine whether this Object is semantically equal to another Object.
static Attendance	getAttendance(java.lang.String name)           Attendance is not a required field in a participant record, therefore if a null or blank name is passed to this method, an IllegalArgumentException is NOT thrown, but rather a null instance is returned.
java.lang.String	getName()
int	hashCode()           Get a value that represents this Object, as uniquely as possible within the confines of an int.
java.lang.String	toString()           Convert this Object to a human-readable String.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

NAME_PRESENT

public static final java.lang.String NAME_PRESENT

Indicates that a participant showed up for a practice, regardless of whether participant was a signup, a substitute, or an extra.

See Also:

Constant Field Values

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NAME_ABSENT

public static final java.lang.String NAME_ABSENT

Indicates that a signed-up participant did not show up for a practice, but either was not assigned, or was assigned but found a substitute.

See Also:

Constant Field Values

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PRESENT

public static final Attendance PRESENT

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ABSENT

public static final Attendance ABSENT

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name

private final java.lang.String name

Constructor Detail

Attendance

protected Attendance(java.lang.String name)

Method Detail

getAttendance

public static Attendance getAttendance(java.lang.String name)
                                throws RowingException

Attendance is not a required field in a participant record, therefore if a null or blank name is passed to this method, an IllegalArgumentException is NOT thrown, but rather a null instance is returned.

Note: values not defined by this class, will throw a RowingException.

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getName

public java.lang.String getName()

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toString

public java.lang.String toString()

Description copied from class: java.lang.Object

Convert this Object to a human-readable String. There are no limits placed on how long this String should be or what it should contain. We suggest you make it as intuitive as possible to be able to place it into System.out.println() 55 and such.

It is typical, but not required, to ensure that this method never completes abruptly with a java.lang.RuntimeException.

This method will be called when performing string concatenation with this object. If the result is null, string concatenation will instead use "null".

The default implementation returns getClass().getName() + "@" + Integer.toHexString(hashCode()).

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hashCode

public int hashCode()

Description copied from class: java.lang.Object

Get a value that represents this Object, as uniquely as possible within the confines of an int.

There are some requirements on this method which subclasses must follow:

• Semantic equality implies identical hashcodes. In other words, if a.equals(b) is true, then a.hashCode() == b.hashCode() must be as well. However, the reverse is not necessarily true, and two objects may have the same hashcode without being equal.
• It must be consistent. Whichever value o.hashCode() returns on the first invocation must be the value returned on all later invocations as long as the object exists. Notice, however, that the result of hashCode may change between separate executions of a Virtual Machine, because it is not invoked on the same object.

Notice that since hashCode is used in java.util.Hashtable and other hashing classes, a poor implementation will degrade the performance of hashing (so don't blindly implement it as returning a constant!). Also, if calculating the hash is time-consuming, a class may consider caching the results.

The default implementation returns System.identityHashCode(this)

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equals

public boolean equals(java.lang.Object o)

Description copied from class: java.lang.Object

Determine whether this Object is semantically equal to another Object.

There are some fairly strict requirements on this method which subclasses must follow:

• It must be transitive. If a.equals(b) and b.equals(c), then a.equals(c) must be true as well.
• It must be symmetric. a.equals(b) and b.equals(a) must have the same value.
• It must be reflexive. a.equals(a) must always be true.
• It must be consistent. Whichever value a.equals(b) returns on the first invocation must be the value returned on all later invocations.
• a.equals(null) must be false.
• It must be consistent with hashCode(). That is, a.equals(b) must imply a.hashCode() == b.hashCode(). The reverse is not true; two objects that are not equal may have the same hashcode, but that has the potential to harm hashing performance.

This is typically overridden to throw a java.lang.ClassCastException if the argument is not comparable to the class performing the comparison, but that is not a requirement. It is legal for a.equals(b) to be true even though a.getClass() != b.getClass(). Also, it is typical to never cause a java.lang.NullPointerException.

In general, the Collections API (java.util) use the equals method rather than the == operator to compare objects. However, java.util.IdentityHashMap is an exception to this rule, for its own good reasons.

The default implementation returns this == o.

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