public static int parse(String stmt, int offset) { int i = offset; for (; i < stmt.length(); i++) { switch (stmt.charAt(i)) { case ' ': continue; case '/': case '#': i = ParseUtil.comment(stmt, i); continue; case '@': return clear2Check(stmt, i); default: return OTHER; } } return OTHER; }
static int clear2WhereCheck(String stmt, int offset) { if (stmt.length() > offset + "HERE ".length()) { char c1 = stmt.charAt(++offset); char c2 = stmt.charAt(++offset); char c3 = stmt.charAt(++offset); char c4 = stmt.charAt(++offset); char c5 = stmt.charAt(++offset); if ((c1 == 'H' || c1 == 'h') && (c2 == 'E' || c2 == 'e') && (c3 == 'R' || c3 == 'r') && (c4 == 'E' || c4 == 'e') && (c5 == ' ')) { while (stmt.length() > ++offset) { switch (stmt.charAt(offset)) { case ' ': continue; case 'D': case 'd': return clear2DCheck(stmt, offset); case 'S': case 's': return clear2SCheck(stmt, offset); default: return OTHER; } } } } return OTHER; }
static int clear2Check(String stmt, int offset) { if (stmt.length() > ++offset && stmt.charAt(offset) == '@' && stmt.length() > offset + "SLOW ".length()) { char c1 = stmt.charAt(++offset); char c2 = stmt.charAt(++offset); char c3 = stmt.charAt(++offset); char c4 = stmt.charAt(++offset); char c5 = stmt.charAt(++offset); if ((c1 == 'S' || c1 == 's') && (c2 == 'L' || c2 == 'l') && (c3 == 'O' || c3 == 'o') && (c4 == 'W' || c4 == 'w') && (c5 == ' ')) { while (stmt.length() > ++offset) { switch (stmt.charAt(offset)) { case ' ': continue; case 'W': case 'w': return clear2WhereCheck(stmt, offset); default: return OTHER; } } } } return OTHER; }
@Test public void testclearSlowSchema() { Assert.assertEquals(ManagerParseClear.SLOW_SCHEMA, 0xff & ManagerParseClear.parse("clear @@slow where schema=s", 5)); Assert.assertEquals(ManagerParseClear.SLOW_SCHEMA, 0xff & ManagerParseClear.parse("CLEAR @@SLOW WHERE SCHEMA= S", 5)); Assert.assertEquals(ManagerParseClear.SLOW_SCHEMA, 0xff & ManagerParseClear.parse("CLEAR @@slow where SCHEMA= s", 5)); }
@Test public void testclearSlowDataNode() { Assert.assertEquals(ManagerParseClear.SLOW_DATANODE, 0xff & ManagerParseClear.parse("clear @@slow where datanode=d", 5)); Assert.assertEquals(ManagerParseClear.SLOW_DATANODE, 0xff & ManagerParseClear.parse("CLEAR @@SLOW WHERE DATANODE= D", 5)); Assert.assertEquals(ManagerParseClear.SLOW_DATANODE, 0xff & ManagerParseClear.parse("clear @@SLOW where DATANODE= d", 5)); }