package com.alibaba.druid.sql.dialect.oracle.parser;
import static com.alibaba.druid.sql.parser.CharTypes.isIdentifierChar;
import java.util.HashMap;
import java.util.Map;
import com.alibaba.druid.sql.parser.Keywords;
import com.alibaba.druid.sql.parser.Lexer;
import com.alibaba.druid.sql.parser.NotAllowCommentException;
import com.alibaba.druid.sql.parser.SQLParseException;
import com.alibaba.druid.sql.parser.Token;
import static com.alibaba.druid.sql.parser.LayoutCharacters.EOI;
public class OracleLexer extends Lexer {
public final static Keywords DEFAULT_ORACLE_KEYWORDS;
static {
Map<String, Token> map = new HashMap<String, Token>();
map.putAll(Keywords.DEFAULT_KEYWORDS.getKeywords());
map.put("BEGIN", Token.BEGIN);
map.put("COLUMN", Token.COLUMN);
map.put("COMMENT", Token.COMMENT);
map.put("COMMIT", Token.COMMIT);
map.put("CONNECT", Token.CONNECT);
map.put("CROSS", Token.CROSS);
map.put("CURSOR", Token.CURSOR);
map.put("DECLARE", Token.DECLARE);
map.put("ERRORS", Token.ERRORS);
map.put("EXCEPTION", Token.EXCEPTION);
map.put("EXCLUSIVE", Token.EXCLUSIVE);
map.put("EXTRACT", Token.EXTRACT);
map.put("GOTO", Token.GOTO);
map.put("GRANT", Token.GRANT);
map.put("IF", Token.IF);
map.put("LIMIT", Token.LIMIT);
map.put("LOCAL", Token.LOCAL);
map.put("LOOP", Token.LOOP);
map.put("MATCHED", Token.MATCHED);
map.put("MERGE", Token.MERGE);
map.put("MODE", Token.MODE);
map.put("MODEL", Token.MODEL);
map.put("NOWAIT", Token.NOWAIT);
map.put("OF", Token.OF);
map.put("PRIOR", Token.PRIOR);
map.put("PROCEDURE", Token.PROCEDURE);
map.put("REJECT", Token.REJECT);
map.put("RETURNING", Token.RETURNING);
map.put("SAVEPOINT", Token.SAVEPOINT);
map.put("SESSION", Token.SESSION);
map.put("SHARE", Token.SHARE);
map.put("START", Token.START);
map.put("SYSDATE", Token.SYSDATE);
map.put("UNLIMITED", Token.UNLIMITED);
map.put("USING", Token.USING);
map.put("WAIT", Token.WAIT);
map.put("WITH", Token.WITH);
DEFAULT_ORACLE_KEYWORDS = new Keywords(map);
}
public OracleLexer(char[] input, int inputLength, boolean skipComment){
super(input, inputLength, skipComment);
super.keywods = DEFAULT_ORACLE_KEYWORDS;
}
public OracleLexer(String input){
super(input);
super.keywods = DEFAULT_ORACLE_KEYWORDS;
}
public void scanVariable() {
if (ch == '@') {
scanChar();
token = Token.MONKEYS_AT;
return;
}
if (ch != ':' && ch != '#' && ch != '$') {
throw new SQLParseException("illegal variable");
}
int hash = ch;
np = bp;
sp = 1;
char ch;
boolean quoteFlag = false;
boolean mybatisFlag = false;
if (buf[bp + 1] == '"') {
hash = 31 * hash + '"';
bp++;
sp++;
quoteFlag = true;
} else if (buf[bp + 1] == '{') {
hash = 31 * hash + '"';
bp++;
sp++;
mybatisFlag = true;
}
for (;;) {
ch = buf[++bp];
if (!isIdentifierChar(ch)) {
break;
}
hash = 31 * hash + ch;
sp++;
continue;
}
if (quoteFlag) {
if (ch != '"') {
throw new SQLParseException("syntax error");
}
hash = 31 * hash + '"';
++bp;
sp++;
} else if (mybatisFlag) {
if (ch != '}') {
throw new SQLParseException("syntax error");
}
hash = 31 * hash + '"';
++bp;
sp++;
}
this.ch = buf[bp];
stringVal = symbolTable.addSymbol(buf, np, sp, hash);
Token tok = keywods.getKeyword(stringVal);
if (tok != null) {
token = tok;
} else {
token = Token.VARIANT;
}
}
public void scanComment() {
if (ch != '/' && ch != '-') {
throw new IllegalStateException();
}
np = bp;
sp = 0;
scanChar();
// /*+ */
if (ch == '*') {
scanChar();
sp++;
while (ch == ' ') {
scanChar();
sp++;
}
boolean isHint = false;
int startHintSp = sp + 1;
if (ch == '+') {
isHint = true;
scanChar();
sp++;
}
for (;;) {
if (ch == '*' && buf[bp + 1] == '/') {
sp += 2;
scanChar();
scanChar();
break;
}
scanChar();
sp++;
}
if (isHint) {
stringVal = new String(buf, np + startHintSp, (sp - startHintSp) - 1);
token = Token.HINT;
} else {
stringVal = new String(buf, np, sp);
token = Token.MULTI_LINE_COMMENT;
}
if (token != Token.HINT && !isAllowComment()) {
throw new NotAllowCommentException();
}
return;
}
if (!isAllowComment()) {
throw new NotAllowCommentException();
}
if (ch == '/' || ch == '-') {
scanChar();
sp++;
for (;;) {
if (ch == '\r') {
if (buf[bp + 1] == '\n') {
sp += 2;
scanChar();
break;
}
sp++;
break;
} else if (ch == EOI) {
break;
}
if (ch == '\n') {
scanChar();
sp++;
break;
}
scanChar();
sp++;
}
stringVal = new String(buf, np + 1, sp);
token = Token.LINE_COMMENT;
return;
}
}
public void scanNumber() {
np = bp;
if (ch == '-') {
sp++;
ch = buf[++bp];
}
for (;;) {
if (ch >= '0' && ch <= '9') {
sp++;
} else {
break;
}
ch = buf[++bp];
}
boolean isDouble = false;
if (ch == '.') {
if (buf[bp + 1] == '.') {
token = Token.LITERAL_INT;
return;
}
sp++;
ch = buf[++bp];
isDouble = true;
for (;;) {
if (ch >= '0' && ch <= '9') {
sp++;
} else {
break;
}
ch = buf[++bp];
}
}
if (ch == 'e' || ch == 'E') {
sp++;
ch = buf[++bp];
if (ch == '+' || ch == '-') {
sp++;
ch = buf[++bp];
}
for (;;) {
if (ch >= '0' && ch <= '9') {
sp++;
} else {
break;
}
ch = buf[++bp];
}
isDouble = true;
}
if (ch == 'f' || ch == 'F') {
token = Token.BINARY_FLOAT;
scanChar();
return;
}
if (ch == 'd' || ch == 'D') {
token = Token.BINARY_DOUBLE;
scanChar();
return;
}
if (isDouble) {
token = Token.LITERAL_FLOAT;
} else {
token = Token.LITERAL_INT;
}
}
}