/**
* Returns the topmost condition, never {@code null}.
*
* @return the topmost condition following up the parent chain or {@code this} if parent is {@code
* null}.
*/
public BaseCondition getRoot() {
BaseCondition p = this;
while (p.getParent() != null) {
p = p.getParent();
}
return p;
}
@Override
public <T extends Query> String visit(BaseQueryBuilder<T> baseQueryBuilder) {
StringBuilder sb = new StringBuilder();
if (baseQueryBuilder.getProjection() != null && baseQueryBuilder.getProjection().length != 0) {
sb.append("SELECT ");
boolean isFirst = true;
for (String projection : baseQueryBuilder.getProjection()) {
if (isFirst) {
isFirst = false;
} else {
sb.append(", ");
}
sb.append(alias).append('.').append(projection);
}
sb.append(' ');
}
sb.append("FROM ")
.append(renderEntityName(baseQueryBuilder.getRootTypeName()))
.append(' ')
.append(alias);
if (baseQueryBuilder.getFilterCondition() != null) {
BaseCondition baseCondition = baseQueryBuilder.getFilterCondition().getRoot();
String whereCondition = baseCondition.accept(this);
if (!whereCondition.isEmpty()) {
sb.append(" WHERE ").append(whereCondition);
}
}
if (baseQueryBuilder.getSortCriteria() != null
&& !baseQueryBuilder.getSortCriteria().isEmpty()) {
sb.append(" ORDER BY ");
boolean isFirst = true;
for (SortCriteria sortCriteria : baseQueryBuilder.getSortCriteria()) {
if (isFirst) {
isFirst = false;
} else {
sb.append(", ");
}
sb.append(alias)
.append('.')
.append(sortCriteria.getAttributePath())
.append(' ')
.append(sortCriteria.getSortOrder().name());
}
}
return sb.toString();
}
private void combine(boolean isConjunction, FilterConditionContext fcc) {
BaseCondition rightCondition = ((BaseCondition) fcc).getRoot();
if (isConjunction && parent instanceof OrCondition) {
BooleanCondition p = new AndCondition(this, rightCondition);
((BooleanCondition) parent).replaceChildCondition(this, p);
parent = p;
rightCondition.setParent(p);
} else {
BaseCondition root = getRoot();
BooleanCondition p =
isConjunction
? new AndCondition(root, rightCondition)
: new OrCondition(root, rightCondition);
root.setParent(p);
rightCondition.setParent(p);
}
rightCondition.setQueryBuilder(queryBuilder);
}