update for KEYCLOAK-8708 Provide aggregation of group attributes for mappers

 src/main/java/org/keycloak/protocol/cas/mappers/UserAttributeMapper.java

@@ -9,6 +9,7 @@
import org.keycloak.provider.ProviderConfigProperty;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Map;

@@ -33,6 +34,12 @@
        property.setType(ProviderConfigProperty.BOOLEAN_TYPE);
        configProperties.add(property);

        property = new ProviderConfigProperty();
        property.setName(ProtocolMapperUtils.AGGREGATE_ATTRS);
        property.setLabel(ProtocolMapperUtils.AGGREGATE_ATTRS_LABEL);
        property.setHelpText(ProtocolMapperUtils.AGGREGATE_ATTRS_HELP_TEXT);
        property.setType(ProviderConfigProperty.BOOLEAN_TYPE);
        configProperties.add(property);
    }

    public static final String PROVIDER_ID = "cas-usermodel-attribute-mapper";
@@ -62,19 +69,29 @@
    public void setAttribute(Map<String, Object> attributes, ProtocolMapperModel mappingModel, UserSessionModel userSession) {
        UserModel user = userSession.getUser();
        String attributeName = mappingModel.getConfig().get(ProtocolMapperUtils.USER_ATTRIBUTE);
        List<String> attributeValue = KeycloakModelUtils.resolveAttribute(user, attributeName);
        boolean aggregateAttrs = Boolean.valueOf(mappingModel.getConfig().get(ProtocolMapperUtils.AGGREGATE_ATTRS));
        Collection<String> attributeValue = KeycloakModelUtils.resolveAttribute(user, attributeName, aggregateAttrs);
        setMappedAttribute(attributes, mappingModel, attributeValue);
    }

    public static ProtocolMapperModel create(String name, String userAttribute,
                                             String tokenClaimName, String claimType,
                                             boolean multivalued) {
        return create(name, userAttribute, tokenClaimName, claimType, multivalued, false);
    }

    public static ProtocolMapperModel create(String name, String userAttribute,
                                             String tokenClaimName, String claimType,
                                             boolean multivalued, boolean aggregateAttrs) {
        ProtocolMapperModel mapper = CASAttributeMapperHelper.createClaimMapper(name, tokenClaimName,
                claimType, PROVIDER_ID);
        mapper.getConfig().put(ProtocolMapperUtils.USER_ATTRIBUTE, userAttribute);
        if (multivalued) {
            mapper.getConfig().put(ProtocolMapperUtils.MULTIVALUED, "true");
        }
        if (aggregateAttrs) {
            mapper.getConfig().put(ProtocolMapperUtils.AGGREGATE_ATTRS, "true");
        }
        return mapper;
    }
}