Code example for KeyStoreException

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                "engineSetKeyEntry is not supported in myKeyStoreSpi"); 
    } 
 
    public void engineSetCertificateEntry(String alias, Certificate cert)
            throws KeyStoreException { 
        throw new KeyStoreException(
                "engineSetCertificateEntry is not supported in myKeyStoreSpi"); 
    } 
 
    public void engineDeleteEntry(String alias) throws KeyStoreException {
        throw new KeyStoreException(
                "engineDeleteEntry is not supported in myKeyStoreSpi"); 
    } 
 
    public Enumeration<String> engineAliases() {
        return null; 
    } 
 
    public boolean engineContainsAlias(String alias) {
        if (alias != null)
        {