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ch.ethz.prose.query
Class Surrogate  

java.lang.Object
  ch.ethz.prose.query.Surrogate

All Implemented Interfaces:

java.io.Serializable

Direct Known Subclasses:

ClassSurrogate, FieldSurrogate, MethodSurrogate

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public abstract class Surrogate

extends java.lang.Object

implements java.io.Serializable

Class Surrogate is the superclass of all Surrogate classe like MethodSurrogate, FieldSurrogate, ClassSurrogate or JoinPointRequestSurrogate.

Version:

$Revision: 1.1.1.1 $

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Constructor Summary

Surrogate()

 

Method Summary
abstract  boolean	equals(java.lang.Object o)           Determine whether this Object is semantically equal to another Object.
abstract  java.lang.String	getName()
abstract  int	hashCode()           Get a value that represents this Object, as uniquely as possible within the confines of an int.
abstract  java.lang.Object	toRealInstance()

 

Methods inherited from class java.lang.Object

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

 

Constructor Detail

Surrogate

public Surrogate()

Method Detail

toRealInstance

public abstract java.lang.Object toRealInstance()
                                         throws java.lang.ClassNotFoundException,
                                                java.lang.NoSuchFieldException,
                                                java.lang.NoSuchMethodException

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getName

public abstract java.lang.String getName()

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hashCode

public abstract 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 abstract 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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Overview  Package   Class  Use  Deprecated  Index
Home >> All >> ch >> ethz >> prose >> [ query overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

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