/**
* @see
* <a>http://www.elasticsearch.org/guide/en/elasticsearch/client/java-api/current/query-dsl-filters.html</a>
*/
private Query build(List<ColumnFilter> filterList, Operator operator) {
if (filterList == null) return null;
List<Query> results = new LinkedList<Query>();
for (ColumnFilter filter : filterList) {
Query result = null;
// Core functions.
if (filter instanceof CoreFunctionFilter) {
result = buildColumnCoreFunctionFilter((CoreFunctionFilter) filter, metadata);
}
// Logical expressions.
else if (filter instanceof LogicalExprFilter) {
LogicalExprFilter f = (LogicalExprFilter) filter;
LogicalExprType type = f.getLogicalOperator();
if (LogicalExprType.AND.equals(type)) {
result = buildLogicalExpressionFilter(f, Operator.AND);
} else if (LogicalExprType.OR.equals(type)) {
result = buildLogicalExpressionFilter(f, Operator.OR);
} else if (LogicalExprType.NOT.equals(type)) {
result = buildLogicalExpressionFilter(f, Operator.NOT);
}
}
if (result != null) results.add(result);
}
return joinQueriesAndFilters(results, operator);
}
protected Query buildLogicalExpressionFilter(LogicalExprFilter filter, Operator operator) {
if (filter == null) return null;
List<ColumnFilter> columnFilters = filter.getLogicalTerms();
if (columnFilters != null && !columnFilters.isEmpty()) {
return build(columnFilters, operator);
}
return null;
}