protected static Constraint parseWhereConstraint(StreamKeywordTokenizer tokens, Filter filter)
throws IOException {
Constraint result = null;
tokens.nextToken();
if (tokens.ttype == '(') {
result = parseWhereOr(tokens, filter);
tokens.nextToken();
if (tokens.ttype != ')') {
throw FilterParserException.create(App.messages.getString("res.614"), tokens);
}
} else {
tokens.pushBack();
Object c1 = parseWhereValue(tokens, filter);
String op = parseWhereOperator(tokens, filter);
Object c2 = parseWhereValue(tokens, filter);
result = new Constraint();
result.setOperator(op);
result.setLeftOperand(c1);
result.setRightOperand(c2);
}
return result;
}
protected static Object parseWhereValue(StreamKeywordTokenizer tokens, Filter filter)
throws IOException {
tokens.nextToken();
if (tokens.ttype == tokens.TT_VARIABLE || tokens.ttype == tokens.TT_WORD) {
return filter.get(tokens.sval);
} else if (tokens.ttype == tokens.TT_NUMBER) {
return new Double(tokens.nval);
} else if (tokens.ttype == '?') {
return new QMark();
} else if (tokens.ttype == '\'') {
return tokens.sval;
} else if (tokens.ttype == tokens.TT_KEYWORD && TRUE.equals(tokens.sval)) {
return Boolean.TRUE;
} else if (tokens.ttype == tokens.TT_KEYWORD && FALSE.equals(tokens.sval)) {
return Boolean.FALSE;
} /*else if (tokens.ttype == tokens.TT_KEYWORD
&& NULL.equals(tokens.sval)) {
return null;
} */ else if (tokens.ttype == '(') { // for in operator ex: toto in
// (1,2,3)
tokens.nextToken();
tokens.pushBack();
HashSet list = new HashSet();
do {
Object o = parseWhereValue(tokens, filter);
list.add(o);
tokens.nextToken();
} while (tokens.ttype == ',');
if (tokens.ttype != ')') {
throw FilterParserException.create(App.messages.getString("res.616"), tokens);
}
return list;
}
// TODO peut etre avoir un keyword DATE pour les dates: Date(31/12/2004)
throw FilterParserException.create(App.messages.getString("res.617"), tokens);
}
protected static String parseWhereOperator(StreamKeywordTokenizer tokens, Filter filter)
throws IOException {
String result = "";
tokens.nextToken();
if (tokens.ttype == '=') {
return result = "=";
} else if (tokens.ttype == '<') {
result = "<";
if (tokens.nextToken() == '=') {
result += "=";
} else {
tokens.pushBack();
}
return result;
} else if (tokens.ttype == '>') {
result = ">";
if (tokens.nextToken() == '=') {
result += "=";
} else {
tokens.pushBack();
}
return result;
} else if (tokens.ttype == '!') {
if (tokens.nextToken() == '=') {
return result = "!=";
}
} else if (tokens.ttype == tokens.TT_KEYWORD) {
// if (NOT.equals(tokens.sval)) {
// result = "not ";
// tokens.nextToken();
// }
// if (tokens.ttype == tokens.TT_KEYWORD) {
// if (LIKE.equals(tokens.sval)) {
// return result += "like";
// } else if (IN.equals(tokens.sval)) {
// return result += "in";
// }
// }
}
throw FilterParserException.create(App.messages.getString("res.615"), tokens);
}
