Example usage for org.apache.commons.collections4 SetUtils emptyIfNull

Introduction

In this page you can find the example usage for org.apache.commons.collections4 SetUtils emptyIfNull.

Prototype

public static <T> Set<T> emptyIfNull(final Set<T> set) 

Source Link

Document

Returns an immutable empty set if the argument is null, or the argument itself otherwise.

Usage

From source file:org.apache.syncope.core.misc.security.AuthDataAccessor.java

protected Set<? extends ExternalResource> getPassthroughResources(final User user) {
    Set<? extends ExternalResource> result = null;

    // 1. look for assigned resources, pick the ones whose account policy has authentication resources
    for (ExternalResource resource : userDAO.findAllResources(user)) {
        if (resource.getAccountPolicy() != null && !resource.getAccountPolicy().getResources().isEmpty()) {
            if (result == null) {
                result = resource.getAccountPolicy().getResources();
            } else {
                result.retainAll(resource.getAccountPolicy().getResources());
            }/*from  w w w  . j a  v a 2 s .  co  m*/
        }
    }

    // 2. look for realms, pick the ones whose account policy has authentication resources
    for (Realm realm : realmDAO.findAncestors(user.getRealm())) {
        if (realm.getAccountPolicy() != null && !realm.getAccountPolicy().getResources().isEmpty()) {
            if (result == null) {
                result = realm.getAccountPolicy().getResources();
            } else {
                result.retainAll(realm.getAccountPolicy().getResources());
            }
        }
    }

    return SetUtils.emptyIfNull(result);
}

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From source file:org.apache.syncope.core.persistence.api.dao.AllowedSchemas.java

public Set<S> getForMembership(final Group group) {
    return SetUtils.emptyIfNull(forMemberships.get(group));
}

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