Where.java 文件源码

@SuppressWarnings("unchecked")
static CompiledClause doCompile(Mapper<?> mapper, String clause) {
    Map<String, AccessibleProperty> properties = mapper.allPropertiesMap;
    StringBuilder sb = new StringBuilder(clause.length() + 10);
    List<AttributeConverter<Object, Object>> list = new ArrayList<>();
    int start = 0;
    Matcher m = p.matcher(clause.toLowerCase());
    while (m.find()) {
        sb.append(clause.substring(start, m.start()));
        String s = clause.substring(m.start(), m.end());
        if (properties.containsKey(s.toLowerCase())) {
            AccessibleProperty ap = properties.get(s.toLowerCase());
            sb.append(ap.columnName);
            list.add(ap.converter);
        } else {
            if (s.toLowerCase().equals("between")) {
                list.add(list.get(list.size() - 1));
            } else if (s.toLowerCase().equals("null")) {
                list.remove(list.size() - 1);
            } else {
                if (!KEYWORDS.contains(s.toLowerCase())) {
                    throw new IllegalArgumentException("Invalid string \"" + s + "\" found in clause: " + clause);
                }
            }
            sb.append(s);
        }
        start = m.end();
    }
    sb.append(clause.substring(start));
    if (list.size() != numOfPlaceholder(clause)) {
        throw new IllegalArgumentException("Invalid number of placeholder.");
    }
    return new CompiledClause(sb.toString(), list.toArray(new AttributeConverter[0]));
}