protected <N extends Number> NumericRangeQuery<?> numericRange(Class<N> clazz, String field,
            @Nullable N min, @Nullable N max, boolean minInc, boolean maxInc) {
        if (clazz.equals(Integer.class)) {
            return NumericRangeQuery.newIntRange(field, (Integer) min, (Integer) max, minInc, maxInc);
        } else if (clazz.equals(Double.class)) {
            return NumericRangeQuery.newDoubleRange(field, (Double) min, (Double) max, minInc, minInc);
        } else if (clazz.equals(Float.class)) {
            return NumericRangeQuery.newFloatRange(field, (Float) min, (Float) max, minInc, minInc);
        } else if (clazz.equals(Long.class)) {
            return NumericRangeQuery.newLongRange(field, (Long) min, (Long) max, minInc, minInc);
        } else if (clazz.equals(Byte.class) || clazz.equals(Short.class)) {
            return NumericRangeQuery.newIntRange(field, min != null ? min.intValue() : null,
                    max != null ? max.intValue() : null, minInc, maxInc);
        } else {
            throw new IllegalArgumentException("Unsupported numeric type " + clazz.getName());
        }
    }
If the query is a BooleanQuery and it contains a single Occur.MUST_NOT
clause it will be returned as is. Otherwise it will be wrapped in a
BooleanClause with the given Occur.
querydsl-lucene3/src/main/java/com/querydsl/lucene3/LuceneSerializer.java