A recent article (Barksy, Kaplan, & Beal, 2011) provides a model that explains the role of affect and emotions at various stages of the appraisal and reaction stages of justice perception formation and illustrates that injustice is generally an affect-laden and subjective experience.
A recent meta-analysis by Barsky and Kaplan (2007) condenses many studies on this topic and explains that state and trait level affect can influence one's perceptions of justice.