/*
* Copyright 2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* $Header:$
*/
package org.apache.beehive.netui.script.el.parser;
import org.apache.beehive.netui.script.el.ExpressionTerm;
import org.apache.beehive.netui.script.el.LiteralTerm;
import org.apache.beehive.netui.script.el.ParsedExpression;
import org.apache.beehive.netui.script.el.Term;
import org.apache.beehive.netui.script.el.tokens.*;
public class NetUIELParser
implements NetUIELParserConstants {
public static void main(String[] args)
throws Exception {
NetUIELParser parser = new NetUIELParser(System.in);
parser.parse();
}
// 3.
final public ParsedExpression parse() throws ParseException {
Token t = null;
ParsedExpression pe = new ParsedExpression();
Term term = null;
label_1:
while(true) {
switch((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
case NON_EXPRESSION_TEXT:
case START_EXPRESSION:
case ESCAPED_START_EXPRESSION:
;
break;
default:
jj_la1[0] = jj_gen;
break label_1;
}
switch((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
case NON_EXPRESSION_TEXT:
term = parseLiteralTerm();
pe.addTerm(term);
break;
case START_EXPRESSION:
jj_consume_token(START_EXPRESSION);
term = parseExpression();
jj_consume_token(END_EXPRESSION);
pe.addTerm(term);
break;
case ESCAPED_START_EXPRESSION:
jj_consume_token(ESCAPED_START_EXPRESSION);
term = parseExpression();
jj_consume_token(END_EXPRESSION);
pe.addTerm(new LiteralTerm("\\"));
pe.addTerm(term);
break;
default:
jj_la1[1] = jj_gen;
jj_consume_token(-1);
throw new ParseException();
}
}
jj_consume_token(0);
{
if(true) return pe;
}
throw new Error("Missing return statement in function");
}
final public LiteralTerm parseLiteralTerm() throws ParseException {
Token t = null;
LiteralTerm ls = null;
t = jj_consume_token(NON_EXPRESSION_TEXT);
ls = new LiteralTerm(t.image);
{
if(true) return ls;
}
throw new Error("Missing return statement in function");
}
final public ExpressionTerm parseExpression() throws ParseException {
ExpressionTerm expr = new ExpressionTerm();
ExpressionToken eTok = null;
eTok = Context();
expr.addToken(eTok);
label_2:
while(true) {
switch((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
case DOT:
case LBRACKET:
;
break;
default:
jj_la1[2] = jj_gen;
break label_2;
}
switch((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
case DOT:
jj_consume_token(DOT);
eTok = ExprIdentifier();
break;
default:
jj_la1[3] = jj_gen;
if(jj_2_1(2)) {
eTok = MapKey();
} else {
switch((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
case LBRACKET:
eTok = ArrayIndex();
break;
default:
jj_la1[4] = jj_gen;
jj_consume_token(-1);
throw new ParseException();
}
}
}
{
expr.addToken(eTok);
}
}
expr.seal();
{
if(true) return expr;
}
throw new Error("Missing return statement in function");
}
final public ExpressionToken Context() throws ParseException {
Token t = null;
ExpressionToken eTok = null;
t = jj_consume_token(IDENTIFIER);
//System.out.println("** Parser found context: " + t.image);
eTok = new ContextToken(t.image);
{
if(true) return eTok;
}
throw new Error("Missing return statement in function");
}
final public ExpressionToken ExprIdentifier() throws ParseException {
Token t = null;
ExpressionToken eTok = null;
t = jj_consume_token(IDENTIFIER);
//System.out.println("** Parser found identifier: " + t.image);
eTok = new IdentifierToken(t.image);
{
if(true) return eTok;
}
throw new Error("Missing return statement in function");
}
// handle text inside of map braces as ["..."] or ['...']
final public ExpressionToken MapKey() throws ParseException {
Token t = null;
ExpressionToken eTok = null;
jj_consume_token(LBRACKET);
t = jj_consume_token(STRING_LITERAL);
jj_consume_token(RBRACKET);
eTok = new MapKeyToken(t.image);
{
if(true) return eTok;
}
throw new Error("Missing return statement in function");
}
final public ExpressionToken ArrayIndex() throws ParseException {
Token t = null;
ExpressionToken eTok = null;
jj_consume_token(LBRACKET);
t = jj_consume_token(INTEGER);
jj_consume_token(RBRACKET);
//System.out.println("** Parser found array index: " + t.image);
eTok = new ArrayIndexToken(t.image);
{
if(true) return eTok;
}
throw new Error("Missing return statement in function");
}
final private boolean jj_2_1(int xla) {
jj_la = xla;
jj_lastpos = jj_scanpos = token;
boolean retval = !jj_3_1();
jj_save(0, xla);
return retval;
}
final private boolean jj_3_1() {
if(jj_3R_3()) return true;
if(jj_la == 0 && jj_scanpos == jj_lastpos) return false;
return false;
}
final private boolean jj_3R_3() {
if(jj_scan_token(LBRACKET)) return true;
if(jj_la == 0 && jj_scanpos == jj_lastpos) return false;
if(jj_scan_token(STRING_LITERAL)) return true;
if(jj_la == 0 && jj_scanpos == jj_lastpos) return false;
return false;
}
public NetUIELParserTokenManager token_source;
SimpleCharStream jj_input_stream;
public Token token, jj_nt;
private int jj_ntk;
private Token jj_scanpos, jj_lastpos;
private int jj_la;
public boolean lookingAhead = false;
private boolean jj_semLA;
private int jj_gen;
final private int[] jj_la1 = new int[5];
static private int[] jj_la1_0;
static {
jj_la1_0();
}
private static void jj_la1_0() {
jj_la1_0 = new int[]{0xe, 0xe, 0x12000, 0x2000, 0x10000, };
}
final private JJCalls[] jj_2_rtns = new JJCalls[1];
private boolean jj_rescan = false;
private int jj_gc = 0;
public NetUIELParser(java.io.InputStream stream) {
jj_input_stream = new SimpleCharStream(stream, 1, 1);
token_source = new NetUIELParserTokenManager(jj_input_stream);
token = new Token();
jj_ntk = -1;
jj_gen = 0;
for(int i = 0; i < 5; i++) jj_la1[i] = -1;
for(int i = 0; i < jj_2_rtns.length; i++) jj_2_rtns[i] = new JJCalls();
}
public void ReInit(java.io.InputStream stream) {
jj_input_stream.ReInit(stream, 1, 1);
token_source.ReInit(jj_input_stream);
token = new Token();
jj_ntk = -1;
jj_gen = 0;
for(int i = 0; i < 5; i++) jj_la1[i] = -1;
for(int i = 0; i < jj_2_rtns.length; i++) jj_2_rtns[i] = new JJCalls();
}
public NetUIELParser(java.io.Reader stream) {
jj_input_stream = new SimpleCharStream(stream, 1, 1);
token_source = new NetUIELParserTokenManager(jj_input_stream);
token = new Token();
jj_ntk = -1;
jj_gen = 0;
for(int i = 0; i < 5; i++) jj_la1[i] = -1;
for(int i = 0; i < jj_2_rtns.length; i++) jj_2_rtns[i] = new JJCalls();
}
public void ReInit(java.io.Reader stream) {
jj_input_stream.ReInit(stream, 1, 1);
token_source.ReInit(jj_input_stream);
token = new Token();
jj_ntk = -1;
jj_gen = 0;
for(int i = 0; i < 5; i++) jj_la1[i] = -1;
for(int i = 0; i < jj_2_rtns.length; i++) jj_2_rtns[i] = new JJCalls();
}
public NetUIELParser(NetUIELParserTokenManager tm) {
token_source = tm;
token = new Token();
jj_ntk = -1;
jj_gen = 0;
for(int i = 0; i < 5; i++) jj_la1[i] = -1;
for(int i = 0; i < jj_2_rtns.length; i++) jj_2_rtns[i] = new JJCalls();
}
public void ReInit(NetUIELParserTokenManager tm) {
token_source = tm;
token = new Token();
jj_ntk = -1;
jj_gen = 0;
for(int i = 0; i < 5; i++) jj_la1[i] = -1;
for(int i = 0; i < jj_2_rtns.length; i++) jj_2_rtns[i] = new JJCalls();
}
final private Token jj_consume_token(int kind) throws ParseException {
Token oldToken;
if((oldToken = token).next != null)
token = token.next;
else
token = token.next = token_source.getNextToken();
jj_ntk = -1;
if(token.kind == kind) {
jj_gen++;
if(++jj_gc > 100) {
jj_gc = 0;
for(int i = 0; i < jj_2_rtns.length; i++) {
JJCalls c = jj_2_rtns[i];
while(c != null) {
if(c.gen < jj_gen) c.first = null;
c = c.next;
}
}
}
return token;
}
token = oldToken;
jj_kind = kind;
throw generateParseException();
}
final private boolean jj_scan_token(int kind) {
if(jj_scanpos == jj_lastpos) {
jj_la--;
if(jj_scanpos.next == null) {
jj_lastpos = jj_scanpos = jj_scanpos.next = token_source.getNextToken();
} else {
jj_lastpos = jj_scanpos = jj_scanpos.next;
}
} else {
jj_scanpos = jj_scanpos.next;
}
if(jj_rescan) {
int i = 0;
Token tok = token;
while(tok != null && tok != jj_scanpos) {
i++;
tok = tok.next;
}
if(tok != null) jj_add_error_token(kind, i);
}
return (jj_scanpos.kind != kind);
}
final public Token getNextToken() {
if(token.next != null)
token = token.next;
else
token = token.next = token_source.getNextToken();
jj_ntk = -1;
jj_gen++;
return token;
}
final public Token getToken(int index) {
Token t = lookingAhead ? jj_scanpos : token;
for(int i = 0; i < index; i++) {
if(t.next != null)
t = t.next;
else
t = t.next = token_source.getNextToken();
}
return t;
}
final private int jj_ntk() {
if((jj_nt = token.next) == null)
return (jj_ntk = (token.next = token_source.getNextToken()).kind);
else
return (jj_ntk = jj_nt.kind);
}
private java.util.Vector jj_expentries = new java.util.Vector();
private int[] jj_expentry;
private int jj_kind = -1;
private int[] jj_lasttokens = new int[100];
private int jj_endpos;
private void jj_add_error_token(int kind, int pos) {
if(pos >= 100) return;
if(pos == jj_endpos + 1) {
jj_lasttokens[jj_endpos++] = kind;
} else if(jj_endpos != 0) {
jj_expentry = new int[jj_endpos];
for(int i = 0; i < jj_endpos; i++) {
jj_expentry[i] = jj_lasttokens[i];
}
boolean exists = false;
for(java.util.Enumeration e = jj_expentries.elements(); e.hasMoreElements();) {
int[] oldentry = (int[])(e.nextElement());
if(oldentry.length == jj_expentry.length) {
exists = true;
for(int i = 0; i < jj_expentry.length; i++) {
if(oldentry[i] != jj_expentry[i]) {
exists = false;
break;
}
}
if(exists) break;
}
}
if(!exists) jj_expentries.addElement(jj_expentry);
if(pos != 0) jj_lasttokens[(jj_endpos = pos) - 1] = kind;
}
}
public ParseException generateParseException() {
jj_expentries.removeAllElements();
boolean[] la1tokens = new boolean[18];
for(int i = 0; i < 18; i++) {
la1tokens[i] = false;
}
if(jj_kind >= 0) {
la1tokens[jj_kind] = true;
jj_kind = -1;
}
for(int i = 0; i < 5; i++) {
if(jj_la1[i] == jj_gen) {
for(int j = 0; j < 32; j++) {
if((jj_la1_0[i] & (1 << j)) != 0) {
la1tokens[j] = true;
}
}
}
}
for(int i = 0; i < 18; i++) {
if(la1tokens[i]) {
jj_expentry = new int[1];
jj_expentry[0] = i;
jj_expentries.addElement(jj_expentry);
}
}
jj_endpos = 0;
jj_rescan_token();
jj_add_error_token(0, 0);
int[][] exptokseq = new int[jj_expentries.size()][];
for(int i = 0; i < jj_expentries.size(); i++) {
exptokseq[i] = (int[])jj_expentries.elementAt(i);
}
return new ParseException(token, exptokseq, tokenImage);
}
final public void enable_tracing() {
}
final public void disable_tracing() {
}
final private void jj_rescan_token() {
jj_rescan = true;
for(int i = 0; i < 1; i++) {
JJCalls p = jj_2_rtns[i];
do {
if(p.gen > jj_gen) {
jj_la = p.arg;
jj_lastpos = jj_scanpos = p.first;
switch(i) {
case 0:
jj_3_1();
break;
}
}
p = p.next;
} while(p != null);
}
jj_rescan = false;
}
final private void jj_save(int index, int xla) {
JJCalls p = jj_2_rtns[index];
while(p.gen > jj_gen) {
if(p.next == null) {
p = p.next = new JJCalls();
break;
}
p = p.next;
}
p.gen = jj_gen + xla - jj_la;
p.first = token;
p.arg = xla;
}
static final class JJCalls {
int gen;
Token first;
int arg;
JJCalls next;
}
}