08. Object Orientation (OBJ)

Created by Fred Long, last updated by David Svoboda on Nov 03, 2010 1 minute read

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Guidelines

OBJ00-J. Declare data members as private and provide accessible wrapper methods

OBJ01-J. Be aware that a final reference may not always refer to immutable data

OBJ02-J. Do not ignore return values of methods that operate on immutable objects

OBJ03-J. Do not use public static non-final variables

OBJ04-J. Do not allow access to partially initialized objects

OBJ05-J. Limit the extensibility of non-final classes and methods to trusted subclasses only

OBJ06-J. Compare classes and not class names

OBJ07-J. Understand how a superclass can affect a subclass

OBJ08-J. Avoid using finalizers

OBJ09-J. Immutable classes must prohibit extension

OBJ10-J. Provide mutable classes with copy functionality to allow passing instances to untrusted code safely

OBJ11-J. Defensively copy private mutable class members before returning their references

OBJ12-J. Use checked collections against external code

OBJ13-J. Write garbage collection friendly code

OBJ14-J. Encapsulate the absence of an object by using a Null Object

OBJ15-J. Ensure that keys used in comparison operations cannot be changed

OBJ16-J. Don't pass a reference to an object of an inner class if the encapsulating object maintains sensitive data

Risk Assessment Summary

Recommendations

Guideline	Severity	Likelihood	Remediation Cost	Priority	Level
OBJ00-J	medium	likely	medium	P12	L1
OBJ01-J	low	probable	medium	P4	L3
OBJ02-J	low	unlikely	medium	P2	L3
OBJ03-J	medium	probable	medium	P8	L2
OBJ04-J	high	probable	medium	P12	L1
OBJ05-J	medium	likely	medium	P12	L1
OBJ06-J	medium	unlikely	low	P6	L2
OBJ07-J	medium	probable	high	P4	L3
OBJ08-J	medium	probable	medium	P8	L2
OBJ09-J	medium	probable	low	P12	L1
OBJ10-J	low	likely	medium	P6	L2
OBJ11-J	high	probable	medium	P12	L1
OBJ12-J	low	probable	medium	P4	L3
OBJ13-J	low	likely	high	P3	L3
OBJ14-J	low	probable	high	P2	L3
OBJ15-J	low	probable	high	P2	L3

FLP09-J. Do not rely on the default string representation of floating point values The CERT Oracle Secure Coding Standard for Java OBJ00-J. Declare data members as private and provide accessible wrapper methods

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