plugins/core/src/main/java/org/apache/cxf/fediz/core/saml/SAMLTokenValidator.java [437:464]:
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        Claim t = claimsMap.get(c.getClaimType().toString());
        if (t != null) {
            //same SAML attribute already processed. Thus Claim object already created.
            Object oValue = t.getValue();
            if (oValue instanceof String) {
                //one child element AttributeValue only
                List<String> values = new ArrayList<>();
                values.add((String)oValue); //add existing value
                values.addAll(valueList);
                t.setValue(values);
            } else if (oValue instanceof List<?>) {
                //more than one child element AttributeValue
                @SuppressWarnings("unchecked")
                List<String> values = (List<String>)oValue;
                values.addAll(valueList);
                t.setValue(values);
            } else {
                LOG.error("Unsupported value type of Claim value");
                throw new IllegalStateException("Unsupported value type of Claim value");
            }
        } else {
            if (valueList.size() == 1) {
                c.setValue(valueList.get(0));
            } else {
                c.setValue(valueList);
            }
            // Add claim to map
            claimsMap.put(c.getClaimType().toString(), c);
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services/idp-core/src/main/java/org/apache/cxf/fediz/service/idp/STSAuthenticationProvider.java [229:256]:
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        Claim t = claimsMap.get(c.getClaimType().toString());
        if (t != null) {
            // same SAML attribute already processed. Thus Claim object already created.
            Object oValue = t.getValue();
            if (oValue instanceof String) {
                // one child element AttributeValue only
                List<String> values = new ArrayList<>();
                values.add((String)oValue); // add existing value
                values.addAll(valueList);
                t.setValue(values);
            } else if (oValue instanceof List<?>) {
                // more than one child element AttributeValue
                @SuppressWarnings("unchecked")
                List<String> values = (List<String>)oValue;
                values.addAll(valueList);
                t.setValue(values);
            } else {
                LOG.error("Unsupported value type of Claim value");
                throw new IllegalStateException("Unsupported value type of Claim value");
            }
        } else {
            if (valueList.size() == 1) {
                c.setValue(valueList.get(0));
            } else {
                c.setValue(valueList);
            }
            // Add claim to map
            claimsMap.put(c.getClaimType().toString(), c);
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