jpa/subsystem/src/main/java/org/jboss/as/jpa/config/Configuration.java
public static boolean allowDefaultDataSourceUse(PersistenceUnitMetadata pu) {
        boolean result = true;
        if (pu.getProperties().containsKey(Configuration.JPA_ALLOW_DEFAULT_DATA_SOURCE_USE)) {
            result = Boolean.parseBoolean(pu.getProperties().getProperty(Configuration.JPA_ALLOW_DEFAULT_DATA_SOURCE_USE));
        }
        return result;
    }
public static boolean allowDefaultDataSourceUse(PersistenceUnitMetadata pu) {
        boolean result = true;
        if (pu.getProperties().containsKey(Configuration.JPA_ALLOW_DEFAULT_DATA_SOURCE_USE)) {
            result = Boolean.parseBoolean(pu.getProperties().getProperty(Configuration.JPA_ALLOW_DEFAULT_DATA_SOURCE_USE));
        }
        return result;
    }
Determine if the default data-source should be used

@param pu
@return true if the default data-source should be used