Ease creation of QuerySpecs

[mlopezFC]

If I want a QuerySpec that returns everything I need to:

    QuerySpec querySpec = new QuerySpec();
    querySpec.setFirstResult(0);
    querySpec.setMaxResult(Integer.MAX_VALUE);

Maybe it would be better to use something like QuerySpec.withNoRestrictions();

Also it would be great to have a builder pattern to make it easier to build a new instance.

[javier-godoy]

If I want a QuerySpec that returns everything I need to:

If both firstResult and maxResult are null, it will be a non-paged query:

backend-core/backend-core-business-spring-impl/src/main/java/com/flowingcode/backendcore/service/JpaCrudService.java

Lines 102 to 104 in 6c23b71

	public List<T> filter(QuerySpec filter) {
	if (filter.getFirstResult()==null && filter.getMaxResult()==null) {
	return getExecutor().findAll(buildSpecification(filter), buildSort(filter));

Also it would be great to have a builder pattern to make it easier to build a new instance

+1