SimplePhaseListener.java

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package com.sun.faces.config;

import javax.faces.event.PhaseEvent;
import javax.faces.event.PhaseId;
import javax.faces.event.PhaseListener;

public class SimplePhaseListener implements PhaseListener {

    private static final String HANDLED_BEFORE_AFTER = "Handled Before After";

    private boolean handledBefore = false;
    private boolean handledAfter = false;


    public SimplePhaseListener() {
    }


    public void afterPhase(PhaseEvent event) {
        handledAfter = true;
        if (handledBefore && handledAfter) {
            System.setProperty(HANDLED_BEFORE_AFTER, HANDLED_BEFORE_AFTER);
        }
    }


    public void beforePhase(PhaseEvent event) {
        handledBefore = true;
    }


    public PhaseId getPhaseId() {
        return PhaseId.APPLY_REQUEST_VALUES;
    }
}