Package org.graphstream.stream.file.dot

Source Code of org.graphstream.stream.file.dot.DOTParser$JJCalls

/*
* Copyright 2006 - 2013
*     Stefan Balev     <stefan.balev@graphstream-project.org>
*     Julien Baudry    <julien.baudry@graphstream-project.org>
*     Antoine Dutot    <antoine.dutot@graphstream-project.org>
*     Yoann Pigné      <yoann.pigne@graphstream-project.org>
*     Guilhelm Savin   <guilhelm.savin@graphstream-project.org>
*
* This file is part of GraphStream <http://graphstream-project.org>.
*
* GraphStream is a library whose purpose is to handle static or dynamic
* graph, create them from scratch, file or any source and display them.
*
* This program is free software distributed under the terms of two licenses, the
* CeCILL-C license that fits European law, and the GNU Lesser General Public
* License. You can  use, modify and/ or redistribute the software under the terms
* of the CeCILL-C license as circulated by CEA, CNRS and INRIA at the following
* URL <http://www.cecill.info> or under the terms of the GNU LGPL as published by
* the Free Software Foundation, either version 3 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program.  If not, see <http://www.gnu.org/licenses/>.
*
* The fact that you are presently reading this means that you have had
* knowledge of the CeCILL-C and LGPL licenses and that you accept their terms.
*/
package org.graphstream.stream.file.dot;

import java.io.InputStream;
import java.io.IOException;
import java.io.Reader;

import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedList;

import org.graphstream.stream.SourceBase.ElementType;
import org.graphstream.stream.file.FileSourceDOT;
import org.graphstream.graph.implementations.AbstractElement.AttributeChangeEvent;

import org.graphstream.util.parser.ParseException;
import org.graphstream.util.parser.Parser;
import org.graphstream.util.parser.SimpleCharStream;
import org.graphstream.util.parser.Token;
import org.graphstream.util.parser.TokenMgrError;

/**
* This class defines a DOT parser.
*
* It respects the specifications of the DOT language that can be found <a
* href="http://www.graphviz.org/doc/info/lang.html">here</a>.
*
* Subgraph produces no error but has no effect on the graph.
*/
@SuppressWarnings("unused")
public class DOTParser implements Parser, DOTParserConstants {
  /**
   * The DOT source associated with this parser.
   */
  private FileSourceDOT dot;

  /**
   * Id of the parser used in events.
   */
  private String sourceId;

  /**
   * Flag telling if the graph is directed.
   */
  private boolean directed;

  /**
   * Flag telling if the graph is 'strict'.
   */
  private boolean strict;

  /**
   * Global attributes of nodes.
   */
  private HashMap<String, Object> globalNodesAttributes;

  /**
   * Global attributes of edges.
   */
  private HashMap<String, Object> globalEdgesAttributes;

  /**
   * IDs of added nodes.
   */
  private HashSet<String> nodeAdded;

  /**
   * Create a new parser associated with a DOT source from an input stream.
   */
  public DOTParser(FileSourceDOT dot, InputStream stream) {
    this(stream);
    init(dot);
  }

  /**
   * Create a new parser associated with a DOT source from a reader.
   */
  public DOTParser(FileSourceDOT dot, Reader stream) {
    this(stream);
    init(dot);
  }

  /**
   * Closes the parser, closing the opened stream.
   */
  public void close() throws IOException {
    jj_input_stream.close();
  }

  private void init(FileSourceDOT dot) {
    this.dot = dot;
    this.sourceId = String.format("<DOT stream %x>", System.nanoTime());

    globalNodesAttributes = new HashMap<String, Object>();
    globalEdgesAttributes = new HashMap<String, Object>();

    nodeAdded = new HashSet<String>();
  }

  private void addNode(String nodeId, String[] port,
      HashMap<String, Object> attr) {
    if (nodeAdded.contains(nodeId)) {
      if (attr != null) {
        for (String key : attr.keySet())
          dot.sendAttributeChangedEvent(sourceId, nodeId,
              ElementType.NODE, key, AttributeChangeEvent.ADD,
              null, attr.get(key));
      }
    } else {
      dot.sendNodeAdded(sourceId, nodeId);
      nodeAdded.add(nodeId);

      if (attr == null) {
        for (String key : globalNodesAttributes.keySet())
          dot.sendAttributeChangedEvent(sourceId, nodeId,
              ElementType.NODE, key, AttributeChangeEvent.ADD,
              null, globalNodesAttributes.get(key));
      } else {
        for (String key : globalNodesAttributes.keySet()) {
          if (!attr.containsKey(key))
            dot.sendAttributeChangedEvent(sourceId, nodeId,
                ElementType.NODE, key,
                AttributeChangeEvent.ADD, null,
                globalNodesAttributes.get(key));
        }

        for (String key : attr.keySet())
          dot.sendAttributeChangedEvent(sourceId, nodeId,
              ElementType.NODE, key, AttributeChangeEvent.ADD,
              null, attr.get(key));
      }
    }
  }

  private void addEdges(LinkedList<String> edges, HashMap<String, Object> attr) {
    HashMap<String, Integer> hash = new HashMap<String, Integer>();
    String[] ids = new String[(edges.size() - 1) / 2];
    boolean[] directed = new boolean[(edges.size() - 1) / 2];
    int count = 0;

    for (int i = 0; i < edges.size() - 1; i += 2) {
      String from = edges.get(i);
      String to = edges.get(i + 2);

      if (!nodeAdded.contains(from))
        addNode(from, null, null);
      if (!nodeAdded.contains(to))
        addNode(to, null, null);

      String edgeId = String.format("(%s;%s)", from, to);
      String rev = String.format("(%s;%s)", to, from);

      if (hash.containsKey(rev)) {
        directed[hash.get(rev)] = false;
      } else {
        hash.put(edgeId, count);
        ids[count] = edgeId;
        directed[count] = edges.get(i + 1).equals("->");

        count++;
      }
    }

    hash.clear();

    if (count == 1 && attr != null && attr.containsKey("id")) {
      ids[0] = attr.get("id").toString();
      attr.remove("id");
    }

    for (int i = 0; i < count; i++) {
      dot.sendEdgeAdded(sourceId, ids[i], edges.get(i * 2), edges
          .get((i + 1) * 2), directed[i]);

      if (attr == null) {
        for (String key : globalEdgesAttributes.keySet())
          dot.sendAttributeChangedEvent(sourceId, ids[i],
              ElementType.EDGE, key, AttributeChangeEvent.ADD,
              null, globalEdgesAttributes.get(key));
      } else {
        for (String key : globalEdgesAttributes.keySet()) {
          if (!attr.containsKey(key))
            dot.sendAttributeChangedEvent(sourceId, ids[i],
                ElementType.EDGE, key,
                AttributeChangeEvent.ADD, null,
                globalEdgesAttributes.get(key));
        }

        for (String key : attr.keySet())
          dot.sendAttributeChangedEvent(sourceId, ids[i],
              ElementType.EDGE, key, AttributeChangeEvent.ADD,
              null, attr.get(key));
      }
    }
  }

  private void setGlobalAttributes(String who, HashMap<String, Object> attr) {
    if (who.equalsIgnoreCase("graph")) {
      for (String key : attr.keySet())
        dot.sendAttributeChangedEvent(sourceId, sourceId,
            ElementType.GRAPH, key, AttributeChangeEvent.ADD, null,
            attr.get(key));
    } else if (who.equalsIgnoreCase("node"))
      globalNodesAttributes.putAll(attr);
    else if (who.equalsIgnoreCase("edge"))
      globalEdgesAttributes.putAll(attr);
  }

  final public void all() throws ParseException {
    graph();
    label_1: while (true) {
      switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
      case GRAPH:
      case SUBGRAPH:
      case NODE:
      case EDGE:
      case REAL:
      case STRING:
      case WORD:
        ;
        break;
      default:
        jj_la1[0] = jj_gen;
        break label_1;
      }
      statement();
    }
    jj_consume_token(RBRACE);
  }

  final public boolean next() throws ParseException {
    boolean hasMore = false;
    switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
    case GRAPH:
    case SUBGRAPH:
    case NODE:
    case EDGE:
    case REAL:
    case STRING:
    case WORD:
      statement();
      hasMore = true;
      break;
    case RBRACE:
      jj_consume_token(RBRACE);
      break;
    case 0:
      jj_consume_token(0);
      break;
    default:
      jj_la1[1] = jj_gen;
      jj_consume_token(-1);
      throw new ParseException();
    }

    return hasMore;
  }

  final public void open() throws ParseException {
    graph();
  }

  final private void graph() throws ParseException {
    directed = false;
    strict = false;

    globalNodesAttributes.clear();
    globalEdgesAttributes.clear();
    switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
    case STRICT:
      jj_consume_token(STRICT);
      strict = true;
      break;
    default:
      jj_la1[2] = jj_gen;
      ;
    }
    switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
    case GRAPH:
      jj_consume_token(GRAPH);
      break;
    case DIGRAPH:
      jj_consume_token(DIGRAPH);
      directed = true;
      break;
    default:
      jj_la1[3] = jj_gen;
      jj_consume_token(-1);
      throw new ParseException();
    }
    switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
    case REAL:
    case STRING:
    case WORD:
      this.sourceId = id();
      break;
    default:
      jj_la1[4] = jj_gen;
      ;
    }
    jj_consume_token(LBRACE);
  }

  final private void subgraph() throws ParseException {
    jj_consume_token(SUBGRAPH);
    switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
    case REAL:
    case STRING:
    case WORD:
      id();
      break;
    default:
      jj_la1[5] = jj_gen;
      ;
    }
    jj_consume_token(LBRACE);
    label_2: while (true) {
      switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
      case GRAPH:
      case SUBGRAPH:
      case NODE:
      case EDGE:
      case REAL:
      case STRING:
      case WORD:
        ;
        break;
      default:
        jj_la1[6] = jj_gen;
        break label_2;
      }
      statement();
    }
    jj_consume_token(RBRACE);
  }

  final private String id() throws ParseException {
    Token t;
    String id;
    switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
    case STRING:
      t = jj_consume_token(STRING);
      id = t.image.substring(1, t.image.length() - 1);
      break;
    case REAL:
      t = jj_consume_token(REAL);
      id = t.image;
      break;
    case WORD:
      t = jj_consume_token(WORD);
      id = t.image;
      break;
    default:
      jj_la1[7] = jj_gen;
      jj_consume_token(-1);
      throw new ParseException();
    }

    return id;
  }

  final private void statement() throws ParseException {
    if (jj_2_1(3)) {
      edgeStatement();
    } else {
      switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
      case REAL:
      case STRING:
      case WORD:
        nodeStatement();
        break;
      case GRAPH:
      case NODE:
      case EDGE:
        attributeStatement();
        break;
      case SUBGRAPH:
        subgraph();
        break;
      default:
        jj_la1[8] = jj_gen;
        jj_consume_token(-1);
        throw new ParseException();
      }
    }
    jj_consume_token(27);
  }

  final private void nodeStatement() throws ParseException {
    String nodeId;
    String[] port;
    HashMap<String, Object> attr = null;

    port = null;
    nodeId = id();
    switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
    case COLON:
      port = port();
      break;
    default:
      jj_la1[9] = jj_gen;
      ;
    }
    switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
    case LSQBR:
      attr = attributesList();
      break;
    default:
      jj_la1[10] = jj_gen;
      ;
    }
    addNode(nodeId, port, attr);
  }

  final private String compassPoint() throws ParseException {
    Token pt = null;
    switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
    case 28:
      pt = jj_consume_token(28);
      break;
    case 29:
      pt = jj_consume_token(29);
      break;
    case 30:
      pt = jj_consume_token(30);
      break;
    case 31:
      pt = jj_consume_token(31);
      break;
    case 32:
      pt = jj_consume_token(32);
      break;
    case 33:
      pt = jj_consume_token(33);
      break;
    case 34:
      pt = jj_consume_token(34);
      break;
    case 35:
      pt = jj_consume_token(35);
      break;
    case 36:
      pt = jj_consume_token(36);
      break;
    case 37:
      pt = jj_consume_token(37);
      break;
    default:
      jj_la1[11] = jj_gen;
      jj_consume_token(-1);
      throw new ParseException();
    }

    return pt.image;
  }

  final private String[] port() throws ParseException {
    String[] p = { null, null };
    jj_consume_token(COLON);
    switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
    case REAL:
    case STRING:
    case WORD:
      p[0] = id();
      switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
      case COLON:
        jj_consume_token(COLON);
        p[1] = compassPoint();
        break;
      default:
        jj_la1[12] = jj_gen;
        ;
      }
      break;
    case 28:
    case 29:
    case 30:
    case 31:
    case 32:
    case 33:
    case 34:
    case 35:
    case 36:
    case 37:
      p[1] = compassPoint();
      break;
    default:
      jj_la1[13] = jj_gen;
      jj_consume_token(-1);
      throw new ParseException();
    }

    return p;
  }

  final private void edgeStatement() throws ParseException {
    String id;
    LinkedList<String> edges = new LinkedList<String>();
    HashMap<String, Object> attr = null;
    id = id();
    edges.add(id);
    edgeRHS(edges);
    switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
    case LSQBR:
      attr = attributesList();
      break;
    default:
      jj_la1[14] = jj_gen;
      ;
    }
    addEdges(edges, attr);
  }

  final private void edgeRHS(LinkedList<String> edges) throws ParseException {
    Token t;
    String i;
    t = jj_consume_token(EDGE_OP);
    edges.add(t.image);
    i = id();
    edges.add(i);
    switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
    case EDGE_OP:
      edgeRHS(edges);
      break;
    default:
      jj_la1[15] = jj_gen;
      ;
    }
  }

  final private void attributeStatement() throws ParseException {
    Token t;
    HashMap<String, Object> attr;
    switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
    case GRAPH:
      t = jj_consume_token(GRAPH);
      break;
    case NODE:
      t = jj_consume_token(NODE);
      break;
    case EDGE:
      t = jj_consume_token(EDGE);
      break;
    default:
      jj_la1[16] = jj_gen;
      jj_consume_token(-1);
      throw new ParseException();
    }
    attr = attributesList();
    setGlobalAttributes(t.image, attr);
  }

  final private HashMap<String, Object> attributesList()
      throws ParseException {
    HashMap<String, Object> attributes = new HashMap<String, Object>();
    label_3: while (true) {
      jj_consume_token(LSQBR);
      switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
      case REAL:
      case STRING:
      case WORD:
        attributeList(attributes);
        label_4: while (true) {
          switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
          case COMMA:
            ;
            break;
          default:
            jj_la1[17] = jj_gen;
            break label_4;
          }
          jj_consume_token(COMMA);
          attributeList(attributes);
        }
        break;
      default:
        jj_la1[18] = jj_gen;
        ;
      }
      jj_consume_token(RSQBR);
      switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
      case LSQBR:
        ;
        break;
      default:
        jj_la1[19] = jj_gen;
        break label_3;
      }
    }

    return attributes;
  }

  final private void attributeList(HashMap<String, Object> attributes)
      throws ParseException {
    String key;
    Object val;

    Token t;
    key = id();
    val = Boolean.TRUE;
    switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
    case EQUALS:
      jj_consume_token(EQUALS);
      if (jj_2_2(2)) {
        t = jj_consume_token(REAL);
        val = Double.parseDouble(t.image);
      } else {
        switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
        case REAL:
        case STRING:
        case WORD:
          val = id();
          break;
        default:
          jj_la1[20] = jj_gen;
          jj_consume_token(-1);
          throw new ParseException();
        }
      }
      break;
    default:
      jj_la1[21] = jj_gen;
      ;
    }
    attributes.put(key, val);
  }

  private boolean jj_2_1(int xla) {
    jj_la = xla;
    jj_lastpos = jj_scanpos = token;
    try {
      return !jj_3_1();
    } catch (LookaheadSuccess ls) {
      return true;
    } finally {
      jj_save(0, xla);
    }
  }

  private boolean jj_2_2(int xla) {
    jj_la = xla;
    jj_lastpos = jj_scanpos = token;
    try {
      return !jj_3_2();
    } catch (LookaheadSuccess ls) {
      return true;
    } finally {
      jj_save(1, xla);
    }
  }

  private boolean jj_3R_6() {
    Token xsp;
    xsp = jj_scanpos;
    if (jj_3R_8()) {
      jj_scanpos = xsp;
      if (jj_3R_9()) {
        jj_scanpos = xsp;
        if (jj_3R_10())
          return true;
      }
    }
    return false;
  }

  private boolean jj_3_2() {
    if (jj_scan_token(REAL))
      return true;
    return false;
  }

  private boolean jj_3R_8() {
    if (jj_scan_token(STRING))
      return true;
    return false;
  }

  private boolean jj_3R_10() {
    if (jj_scan_token(WORD))
      return true;
    return false;
  }

  private boolean jj_3R_7() {
    if (jj_scan_token(EDGE_OP))
      return true;
    if (jj_3R_6())
      return true;
    return false;
  }

  private boolean jj_3R_9() {
    if (jj_scan_token(REAL))
      return true;
    return false;
  }

  private boolean jj_3R_5() {
    if (jj_3R_6())
      return true;
    if (jj_3R_7())
      return true;
    return false;
  }

  private boolean jj_3_1() {
    if (jj_3R_5())
      return true;
    return false;
  }

  /** Generated Token Manager. */
  public DOTParserTokenManager token_source;
  SimpleCharStream jj_input_stream;
  /** Current token. */
  public Token token;
  /** Next token. */
  public Token jj_nt;
  private int jj_ntk;
  private Token jj_scanpos, jj_lastpos;
  private int jj_la;
  private int jj_gen;
  final private int[] jj_la1 = new int[22];
  static private int[] jj_la1_0;
  static private int[] jj_la1_1;
  static {
    jj_la1_init_0();
    jj_la1_init_1();
  }

  private static void jj_la1_init_0() {
    jj_la1_0 = new int[] { 0x73a0000, 0x73a2001, 0x400000, 0x60000,
        0x7000000, 0x7000000, 0x73a0000, 0x7000000, 0x73a0000, 0x4000,
        0x400, 0xf0000000, 0x4000, 0xf7000000, 0x400, 0x800000,
        0x320000, 0x8000, 0x7000000, 0x400, 0x7000000, 0x10000, };
  }

  private static void jj_la1_init_1() {
    jj_la1_1 = new int[] { 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
        0x0, 0x0, 0x3f, 0x0, 0x3f, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
        0x0, };
  }

  final private JJCalls[] jj_2_rtns = new JJCalls[2];
  private boolean jj_rescan = false;
  private int jj_gc = 0;

  /** Constructor with InputStream. */
  public DOTParser(java.io.InputStream stream) {
    this(stream, null);
  }

  /** Constructor with InputStream and supplied encoding */
  public DOTParser(java.io.InputStream stream, String encoding) {
    try {
      jj_input_stream = new SimpleCharStream(stream, encoding, 1, 1);
    } catch (java.io.UnsupportedEncodingException e) {
      throw new RuntimeException(e);
    }
    token_source = new DOTParserTokenManager(jj_input_stream);
    token = new Token();
    jj_ntk = -1;
    jj_gen = 0;
    for (int i = 0; i < 22; i++)
      jj_la1[i] = -1;
    for (int i = 0; i < jj_2_rtns.length; i++)
      jj_2_rtns[i] = new JJCalls();
  }

  /** Reinitialise. */
  public void ReInit(java.io.InputStream stream) {
    ReInit(stream, null);
  }

  /** Reinitialise. */
  public void ReInit(java.io.InputStream stream, String encoding) {
    try {
      jj_input_stream.ReInit(stream, encoding, 1, 1);
    } catch (java.io.UnsupportedEncodingException e) {
      throw new RuntimeException(e);
    }
    token_source.ReInit(jj_input_stream);
    token = new Token();
    jj_ntk = -1;
    jj_gen = 0;
    for (int i = 0; i < 22; i++)
      jj_la1[i] = -1;
    for (int i = 0; i < jj_2_rtns.length; i++)
      jj_2_rtns[i] = new JJCalls();
  }

  /** Constructor. */
  public DOTParser(java.io.Reader stream) {
    jj_input_stream = new SimpleCharStream(stream, 1, 1);
    token_source = new DOTParserTokenManager(jj_input_stream);
    token = new Token();
    jj_ntk = -1;
    jj_gen = 0;
    for (int i = 0; i < 22; i++)
      jj_la1[i] = -1;
    for (int i = 0; i < jj_2_rtns.length; i++)
      jj_2_rtns[i] = new JJCalls();
  }

  /** Reinitialise. */
  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 < 22; i++)
      jj_la1[i] = -1;
    for (int i = 0; i < jj_2_rtns.length; i++)
      jj_2_rtns[i] = new JJCalls();
  }

  /** Constructor with generated Token Manager. */
  public DOTParser(DOTParserTokenManager tm) {
    token_source = tm;
    token = new Token();
    jj_ntk = -1;
    jj_gen = 0;
    for (int i = 0; i < 22; i++)
      jj_la1[i] = -1;
    for (int i = 0; i < jj_2_rtns.length; i++)
      jj_2_rtns[i] = new JJCalls();
  }

  /** Reinitialise. */
  public void ReInit(DOTParserTokenManager tm) {
    token_source = tm;
    token = new Token();
    jj_ntk = -1;
    jj_gen = 0;
    for (int i = 0; i < 22; i++)
      jj_la1[i] = -1;
    for (int i = 0; i < jj_2_rtns.length; i++)
      jj_2_rtns[i] = new JJCalls();
  }

  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();
  }

  @SuppressWarnings("serial")
  static private final class LookaheadSuccess extends java.lang.Error {
  }

  final private LookaheadSuccess jj_ls = new LookaheadSuccess();

  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);
    }
    if (jj_scanpos.kind != kind)
      return true;
    if (jj_la == 0 && jj_scanpos == jj_lastpos)
      throw jj_ls;
    return false;
  }

  /** Get the next Token. */
  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;
  }

  /** Get the specific Token. */
  final public Token getToken(int index) {
    Token t = token;
    for (int i = 0; i < index; i++) {
      if (t.next != null)
        t = t.next;
      else
        t = t.next = token_source.getNextToken();
    }
    return t;
  }

  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.List<int[]> jj_expentries = new java.util.ArrayList<int[]>();
  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];
      }
      jj_entries_loop: for (java.util.Iterator<?> it = jj_expentries
          .iterator(); it.hasNext();) {
        int[] oldentry = (int[]) (it.next());
        if (oldentry.length == jj_expentry.length) {
          for (int i = 0; i < jj_expentry.length; i++) {
            if (oldentry[i] != jj_expentry[i]) {
              continue jj_entries_loop;
            }
          }
          jj_expentries.add(jj_expentry);
          break jj_entries_loop;
        }
      }
      if (pos != 0)
        jj_lasttokens[(jj_endpos = pos) - 1] = kind;
    }
  }

  /** Generate ParseException. */
  public ParseException generateParseException() {
    jj_expentries.clear();
    boolean[] la1tokens = new boolean[38];
    if (jj_kind >= 0) {
      la1tokens[jj_kind] = true;
      jj_kind = -1;
    }
    for (int i = 0; i < 22; 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;
          }
          if ((jj_la1_1[i] & (1 << j)) != 0) {
            la1tokens[32 + j] = true;
          }
        }
      }
    }
    for (int i = 0; i < 38; i++) {
      if (la1tokens[i]) {
        jj_expentry = new int[1];
        jj_expentry[0] = i;
        jj_expentries.add(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] = jj_expentries.get(i);
    }
    return new ParseException(token, exptokseq, tokenImage);
  }

  /** Enable tracing. */
  final public void enable_tracing() {
  }

  /** Disable tracing. */
  final public void disable_tracing() {
  }

  private void jj_rescan_token() {
    jj_rescan = true;
    for (int i = 0; i < 2; i++) {
      try {
        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;
            case 1:
              jj_3_2();
              break;
            }
          }
          p = p.next;
        } while (p != null);
      } catch (LookaheadSuccess ls) {
      }
    }
    jj_rescan = false;
  }

  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;
  }

}
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