import java.io.InputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
+import java.io.Reader;
+import java.io.StringReader;
import java.util.ArrayList;
import java.util.List;
if (DEBUG)
System.err.println("PARSEDEBUG: " + str);
}
+
+ /**
+ * Compiles a CQL query.
+ * <P>
+ * The resulting parse tree may be further processed by hand (see
+ * the individual node-types' documentation for details on the
+ * data structure) or, more often, simply rendered out in the
+ * desired form using one of the back-ends. <TT>toCQL()</TT>
+ * returns a decompiled CQL query equivalent to the one that was
+ * compiled in the first place; <TT>toXCQL()</TT> returns an
+ * XML snippet representing the query; and <TT>toPQF()</TT>
+ * returns the query rendered in Index Data's Prefix Query
+ * Format.
+ *
+ * @param cql The query
+ * @return A CQLNode object which is the root of a parse
+ * tree representing the query. */
+ public CQLNode parse(String cql) throws CQLParseException, IOException {
+ return parse(new StringReader(cql));
+ }
/**
* Compiles a CQL query.
* @param cql The query
* @return A CQLNode object which is the root of a parse
* tree representing the query. */
- public CQLNode parse(String cql)
+ public CQLNode parse(Reader cql)
throws CQLParseException, IOException {
lexer = new CQLLexer(cql, LEXDEBUG);
debug("about to parseQuery()");
CQLNode root = parseTopLevelPrefixes("cql.serverChoice",
new CQLRelation(compat == V1POINT2 ? "=" : "scr"));
- if (lexer.ttype != lexer.TT_EOF)
+ if (lexer.ttype != CQLLexer.TT_EOF)
throw new CQLParseException("junk after end: " + lexer.render());
return root;
CQLNode node = parseQuery(index, relation);
if ((compat == V1POINT2 || compat == V1POINT1SORT) &&
- lexer.ttype == lexer.TT_SORTBY) {
+ lexer.ttype == CQLLexer.TT_SORTBY) {
match(lexer.ttype);
debug("sortspec");
CQLSortNode sortnode = new CQLSortNode(node);
- while (lexer.ttype != lexer.TT_EOF) {
+ while (lexer.ttype != CQLLexer.TT_EOF) {
String sortindex = matchSymbol("sort index");
ModifierSet ms = gatherModifiers(sortindex);
sortnode.addSortIndex(ms);
debug("in parseQuery()");
CQLNode term = parseTerm(index, relation);
- while (lexer.ttype != lexer.TT_EOF &&
+ while (lexer.ttype != CQLLexer.TT_EOF &&
lexer.ttype != ')' &&
- lexer.ttype != lexer.TT_SORTBY) {
- if (lexer.ttype == lexer.TT_AND ||
- lexer.ttype == lexer.TT_OR ||
- lexer.ttype == lexer.TT_NOT ||
- lexer.ttype == lexer.TT_PROX) {
+ lexer.ttype != CQLLexer.TT_SORTBY) {
+ if (lexer.ttype == CQLLexer.TT_AND ||
+ lexer.ttype == CQLLexer.TT_OR ||
+ lexer.ttype == CQLLexer.TT_NOT ||
+ lexer.ttype == CQLLexer.TT_PROX) {
int type = lexer.ttype;
String val = lexer.sval;
match(type);
ModifierSet ms = gatherModifiers(val);
CQLNode term2 = parseTerm(index, relation);
- term = ((type == lexer.TT_AND) ? new CQLAndNode(term, term2, ms) :
- (type == lexer.TT_OR) ? new CQLOrNode (term, term2, ms) :
- (type == lexer.TT_NOT) ? new CQLNotNode(term, term2, ms) :
+ term = ((type == CQLLexer.TT_AND) ? new CQLAndNode(term, term2, ms) :
+ (type == CQLLexer.TT_OR) ? new CQLOrNode (term, term2, ms) :
+ (type == CQLLexer.TT_NOT) ? new CQLNotNode(term, term2, ms) :
new CQLProxNode(term, term2, ms));
} else {
throw new CQLParseException("expected boolean, got " +
ModifierSet ms = new ModifierSet(base);
while (lexer.ttype == '/') {
match('/');
- if (lexer.ttype != lexer.TT_WORD)
+ if (lexer.ttype != CQLLexer.TT_WORD)
throw new CQLParseException("expected modifier, "
+ "got " + lexer.render());
String type = lexer.sval.toLowerCase();
debug("non-parenthesised term");
word = matchSymbol("index or term");
- while (lexer.ttype == lexer.TT_WORD && !isRelation()) {
+ while (lexer.ttype == CQLLexer.TT_WORD && !isRelation()) {
word = word + " " + lexer.sval;
- match(lexer.TT_WORD);
+ match(CQLLexer.TT_WORD);
}
if (!isRelation())
break;
index = word;
- String relstr = (lexer.ttype == lexer.TT_WORD ?
+ String relstr = (lexer.ttype == CQLLexer.TT_WORD ?
lexer.sval : lexer.render(lexer.ttype, false));
relation = new CQLRelation(relstr);
match(lexer.ttype);
private boolean isRelation() {
debug("isRelation: checking ttype=" + lexer.ttype +
" (" + lexer.render() + ")");
- if (lexer.ttype == lexer.TT_WORD &&
+ if (lexer.ttype == CQLLexer.TT_WORD &&
(lexer.sval.indexOf('.') >= 0 ||
lexer.sval.equals("any") ||
lexer.sval.equals("all") ||
lexer.sval.equals("within") ||
lexer.sval.equals("encloses") ||
- lexer.sval.equals("exact") ||
+ (lexer.sval.equals("exact") && compat != V1POINT2) ||
(lexer.sval.equals("scr") && compat != V1POINT2) ||
(lexer.sval.equals("adj") && compat == V1POINT2)))
return true;
return (lexer.ttype == '<' ||
lexer.ttype == '>' ||
lexer.ttype == '=' ||
- lexer.ttype == lexer.TT_LE ||
- lexer.ttype == lexer.TT_GE ||
- lexer.ttype == lexer.TT_NE ||
- lexer.ttype == lexer.TT_EQEQ);
+ lexer.ttype == CQLLexer.TT_LE ||
+ lexer.ttype == CQLLexer.TT_GE ||
+ lexer.ttype == CQLLexer.TT_NE ||
+ lexer.ttype == CQLLexer.TT_EQEQ);
}
private void match(int token)
throws CQLParseException, IOException {
debug("in matchSymbol()");
- if (lexer.ttype == lexer.TT_WORD ||
- lexer.ttype == lexer.TT_NUMBER ||
+ if (lexer.ttype == CQLLexer.TT_WORD ||
+ lexer.ttype == CQLLexer.TT_NUMBER ||
lexer.ttype == '"' ||
// The following is a complete list of keywords. Because
// they're listed here, they can be used unquoted as
// indexes, terms, prefix names and prefix identifiers.
// ### Instead, we should ask the lexer whether what we
// have is a keyword, and let the knowledge reside there.
- lexer.ttype == lexer.TT_AND ||
- lexer.ttype == lexer.TT_OR ||
- lexer.ttype == lexer.TT_NOT ||
- lexer.ttype == lexer.TT_PROX ||
- lexer.ttype == lexer.TT_SORTBY) {
- String symbol = (lexer.ttype == lexer.TT_NUMBER) ?
+ lexer.ttype == CQLLexer.TT_AND ||
+ lexer.ttype == CQLLexer.TT_OR ||
+ lexer.ttype == CQLLexer.TT_NOT ||
+ lexer.ttype == CQLLexer.TT_PROX ||
+ lexer.ttype == CQLLexer.TT_SORTBY) {
+ String symbol = (lexer.ttype == CQLLexer.TT_NUMBER) ?
lexer.render() : lexer.sval;
match(lexer.ttype);
return symbol;
f.close();
System.out.println(root.toPQF(config));
} else {
- System.out.print(root.toXCQL(0));
+ System.out.print(root.toXCQL());
}
} catch (IOException ex) {
System.err.println("Can't render query: " + ex.getMessage());
projects / cql-java-moved-to-github.git / blobdiff