lucene/queryparser/src/java/org/apache/lucene/queryparser/classic/QueryParser.java

/* QueryParser.java */
/* Generated By:JavaCC: Do not edit this line. QueryParser.java */
package org.apache.lucene.queryparser.classic;

import java.io.StringReader;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Locale;
import java.util.Set;

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.document.DateTools;
import org.apache.lucene.search.BooleanClause;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.TermRangeQuery;
import org.apache.lucene.queryparser.charstream.CharStream;
import org.apache.lucene.queryparser.charstream.FastCharStream;

/**
 * This class is generated by JavaCC.  The most important method is
 * {@link #parse(String)}.
 *
 * The syntax for query strings is as follows:
 * A Query is a series of clauses.
 * A clause may be prefixed by:
 * <ul>
 * <li> a plus (<code>+</code>) or a minus (<code>-</code>) sign, indicating
 * that the clause is required or prohibited respectively; or
 * <li> a term followed by a colon, indicating the field to be searched.
 * This enables one to construct queries which search multiple fields.
 * </ul>
 *
 * A clause may be either:
 * <ul>
 * <li> a term, indicating all the documents that contain this term; or
 * <li> a nested query, enclosed in parentheses.  Note that this may be used
 * with a <code>+</code>/<code>-</code> prefix to require any of a set of
 * terms.
 * </ul>
 *
 * Thus, in BNF, the query grammar is:
 * <pre>
 *   Query  ::= ( Clause )*
 *   Clause ::= ["+", "-"] [&lt;TERM&gt; ":"] ( &lt;TERM&gt; | "(" Query ")" )
 * </pre>
 *
 * <p>
 * Examples of appropriately formatted queries can be found in the <a
 * href="{@docRoot}/org/apache/lucene/queryparser/classic/package-summary.html#package.description">query syntax
 * documentation</a>.
 * </p>
 *
 * <p>
 * In {@link TermRangeQuery}s, QueryParser tries to detect date values, e.g.
 * <code>date:[6/1/2005 TO 6/4/2005]</code> produces a range query that searches
 * for "date" fields between 2005-06-01 and 2005-06-04. Note that the format
 * of the accepted input depends on {@link #setLocale(Locale) the locale}.
 * A {@link org.apache.lucene.document.DateTools.Resolution} has to be set,
 * if you want to use {@link DateTools} for date conversion.
 * </p>
 * <p>
 * The date resolution that shall be used for RangeQueries can be set
 * using {@link #setDateResolution(DateTools.Resolution)}
 * or {@link #setDateResolution(String, DateTools.Resolution)}. The former
 * sets the default date resolution for all fields, whereas the latter can
 * be used to set field specific date resolutions. Field specific date
 * resolutions take, if set, precedence over the default date resolution.
 * </p>
 * <p>
 * If you don't use {@link DateTools} in your index, you can create your own
 * query parser that inherits QueryParser and overwrites
 * {@link #getRangeQuery(String, String, String, boolean, boolean)} to
 * use a different method for date conversion.
 * </p>
 *
 * <p>Note that QueryParser is <em>not</em> thread-safe.</p> 
 * 
 * <p><b>NOTE</b>: there is a new QueryParser in contrib, which matches
 * the same syntax as this class, but is more modular,
 * enabling substantial customization to how a query is created.
 */
public class QueryParser extends QueryParserBase implements QueryParserConstants {
  /** The default operator for parsing queries.
   * Use {@link QueryParserBase#setDefaultOperator} to change it.
   */
  static public enum Operator { OR, AND }

  /** default split on whitespace behavior */
  public static final boolean DEFAULT_SPLIT_ON_WHITESPACE = false;

  /** Create a query parser.
   *  @param f  the default field for query terms.
   *  @param a   used to find terms in the query text.
   */
   public QueryParser(String f, Analyzer a) {
    this(new FastCharStream(new StringReader("")));
    init(f, a);
  }

  /**
   * Set to true if phrase queries will be automatically generated
   * when the analyzer returns more than one term from whitespace
   * delimited text.
   * NOTE: this behavior may not be suitable for all languages.
   * <p>
   * Set to false if phrase queries should only be generated when
   * surrounded by double quotes.
   * <p>
   * The combination splitOnWhitespace=false and autoGeneratePhraseQueries=true
   * is disallowed.  See <a href="https://issues.apache.org/jira/browse/LUCENE-7533">LUCENE-7533</a>.
   */
  @Override
  public void setAutoGeneratePhraseQueries(boolean value) {
    if (splitOnWhitespace == false && value == true) {
      throw new IllegalArgumentException
          ("setAutoGeneratePhraseQueries(true) is disallowed when getSplitOnWhitespace() == false");
    }
    this.autoGeneratePhraseQueries = value;
  }

  /**
   * @see #setSplitOnWhitespace(boolean)
   */
  public boolean getSplitOnWhitespace() {
    return splitOnWhitespace;
  }

  /**
   * Whether query text should be split on whitespace prior to analysis.
   * Default is <code>{@value #DEFAULT_SPLIT_ON_WHITESPACE}</code>.
   * <p>
   * The combination splitOnWhitespace=false and autoGeneratePhraseQueries=true
   * is disallowed.  See <a href="https://issues.apache.org/jira/browse/LUCENE-7533">LUCENE-7533</a>.
   */
  public void setSplitOnWhitespace(boolean splitOnWhitespace) {
    if (splitOnWhitespace == false && getAutoGeneratePhraseQueries() == true) {
      throw new IllegalArgumentException
          ("setSplitOnWhitespace(false) is disallowed when getAutoGeneratePhraseQueries() == true");
    }
    this.splitOnWhitespace = splitOnWhitespace;
  }

  private boolean splitOnWhitespace = DEFAULT_SPLIT_ON_WHITESPACE;
  private static Set<Integer> disallowedPostMultiTerm
    = new HashSet<Integer>(Arrays.asList(COLON, STAR, FUZZY_SLOP, CARAT, AND, OR));
  private static boolean allowedPostMultiTerm(int tokenKind) {
    return disallowedPostMultiTerm.contains(tokenKind) == false;
  }

// *   Query  ::= ( Clause )*
// *   Clause ::= ["+", "-"] [<TERM> ":"] ( <TERM> | "(" Query ")" )
  final public 
int Conjunction() throws ParseException {int ret = CONJ_NONE;
    switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
    case AND:
    case OR:{
      switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
      case AND:{
        jj_consume_token(AND);
ret = CONJ_AND;
        break;
        }
      case OR:{
        jj_consume_token(OR);
ret = CONJ_OR;
        break;
        }
      default:
        jj_la1[0] = jj_gen;
        jj_consume_token(-1);
        throw new ParseException();
      }
      break;
      }
    default:
      jj_la1[1] = jj_gen;
      ;
    }
{if ("" != null) return ret;}
    throw new Error("Missing return statement in function");
}

  final public int Modifiers() throws ParseException {int ret = MOD_NONE;
    switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
    case NOT:
    case PLUS:
    case MINUS:{
      switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
      case PLUS:{
        jj_consume_token(PLUS);
ret = MOD_REQ;
        break;
        }
      case MINUS:{
        jj_consume_token(MINUS);
ret = MOD_NOT;
        break;
        }
      case NOT:{
        jj_consume_token(NOT);
ret = MOD_NOT;
        break;
        }
      default:
        jj_la1[2] = jj_gen;
        jj_consume_token(-1);
        throw new ParseException();
      }
      break;
      }
    default:
      jj_la1[3] = jj_gen;
      ;
    }
{if ("" != null) return ret;}
    throw new Error("Missing return statement in function");
}

// This makes sure that there is no garbage after the query string
  final public Query TopLevelQuery(String field) throws ParseException {Query q;
    q = Query(field);
    jj_consume_token(0);
{if ("" != null) return q;}
    throw new Error("Missing return statement in function");
}

  final public Query Query(String field) throws ParseException {List<BooleanClause> clauses = new ArrayList<BooleanClause>();
  Query q, firstQuery=null;
  int conj, mods;
    if (jj_2_1(2)) {
      firstQuery = MultiTerm(field, clauses);
    } else {
      switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
      case NOT:
      case PLUS:
      case MINUS:
      case BAREOPER:
      case LPAREN:
      case STAR:
      case QUOTED:
      case TERM:
      case PREFIXTERM:
      case WILDTERM:
      case REGEXPTERM:
      case RANGEIN_START:
      case RANGEEX_START:
      case NUMBER:{
        mods = Modifiers();
        q = Clause(field);
addClause(clauses, CONJ_NONE, mods, q);
        if (mods == MOD_NONE) {
          firstQuery = q;
        }
        break;
        }
      default:
        jj_la1[4] = jj_gen;
        jj_consume_token(-1);
        throw new ParseException();
      }
    }
    label_1:
    while (true) {
      switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
      case AND:
      case OR:
      case NOT:
      case PLUS:
      case MINUS:
      case BAREOPER:
      case LPAREN:
      case STAR:
      case QUOTED:
      case TERM:
      case PREFIXTERM:
      case WILDTERM:
      case REGEXPTERM:
      case RANGEIN_START:
      case RANGEEX_START:
      case NUMBER:{
        ;
        break;
        }
      default:
        jj_la1[5] = jj_gen;
        break label_1;
      }
      if (jj_2_2(2)) {
        MultiTerm(field, clauses);
      } else {
        switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
        case AND:
        case OR:
        case NOT:
        case PLUS:
        case MINUS:
        case BAREOPER:
        case LPAREN:
        case STAR:
        case QUOTED:
        case TERM:
        case PREFIXTERM:
        case WILDTERM:
        case REGEXPTERM:
        case RANGEIN_START:
        case RANGEEX_START:
        case NUMBER:{
          conj = Conjunction();
          mods = Modifiers();
          q = Clause(field);
addClause(clauses, conj, mods, q);
          break;
          }
        default:
          jj_la1[6] = jj_gen;
          jj_consume_token(-1);
          throw new ParseException();
        }
      }
    }
if (clauses.size() == 1 && firstQuery != null) {
      {if ("" != null) return firstQuery;}
    } else {
      {if ("" != null) return getBooleanQuery(clauses);}
    }
    throw new Error("Missing return statement in function");
}

  final public Query Clause(String field) throws ParseException {Query q;
  Token fieldToken=null, boost=null;
    if (jj_2_3(2)) {
      switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
      case TERM:{
        fieldToken = jj_consume_token(TERM);
        jj_consume_token(COLON);
field=discardEscapeChar(fieldToken.image);
        break;
        }
      case STAR:{
        jj_consume_token(STAR);
        jj_consume_token(COLON);
field="*";
        break;
        }
      default:
        jj_la1[7] = jj_gen;
        jj_consume_token(-1);
        throw new ParseException();
      }
    } else {
      ;
    }
    switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
    case BAREOPER:
    case STAR:
    case QUOTED:
    case TERM:
    case PREFIXTERM:
    case WILDTERM:
    case REGEXPTERM:
    case RANGEIN_START:
    case RANGEEX_START:
    case NUMBER:{
      q = Term(field);
      break;
      }
    case LPAREN:{
      jj_consume_token(LPAREN);
      q = Query(field);
      jj_consume_token(RPAREN);
      switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
      case CARAT:{
        jj_consume_token(CARAT);
        boost = jj_consume_token(NUMBER);
        break;
        }
      default:
        jj_la1[8] = jj_gen;
        ;
      }
      break;
      }
    default:
      jj_la1[9] = jj_gen;
      jj_consume_token(-1);
      throw new ParseException();
    }
{if ("" != null) return handleBoost(q, boost);}
    throw new Error("Missing return statement in function");
}

  final public Query Term(String field) throws ParseException {Token term, boost=null, fuzzySlop=null, goop1, goop2;
  boolean prefix = false;
  boolean wildcard = false;
  boolean fuzzy = false;
  boolean regexp = false;
  boolean startInc=false;
  boolean endInc=false;
  Query q;
    switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
    case BAREOPER:
    case STAR:
    case TERM:
    case PREFIXTERM:
    case WILDTERM:
    case REGEXPTERM:
    case NUMBER:{
      switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
      case TERM:{
        term = jj_consume_token(TERM);
        break;
        }
      case STAR:{
        term = jj_consume_token(STAR);
wildcard=true;
        break;
        }
      case PREFIXTERM:{
        term = jj_consume_token(PREFIXTERM);
prefix=true;
        break;
        }
      case WILDTERM:{
        term = jj_consume_token(WILDTERM);
wildcard=true;
        break;
        }
      case REGEXPTERM:{
        term = jj_consume_token(REGEXPTERM);
regexp=true;
        break;
        }
      case NUMBER:{
        term = jj_consume_token(NUMBER);
        break;
        }
      case BAREOPER:{
        term = jj_consume_token(BAREOPER);
term.image = term.image.substring(0,1);
        break;
        }
      default:
        jj_la1[10] = jj_gen;
        jj_consume_token(-1);
        throw new ParseException();
      }
      switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
      case CARAT:
      case FUZZY_SLOP:{
        switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
        case CARAT:{
          jj_consume_token(CARAT);
          boost = jj_consume_token(NUMBER);
          switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
          case FUZZY_SLOP:{
            fuzzySlop = jj_consume_token(FUZZY_SLOP);
fuzzy=true;
            break;
            }
          default:
            jj_la1[11] = jj_gen;
            ;
          }
          break;
          }
        case FUZZY_SLOP:{
          fuzzySlop = jj_consume_token(FUZZY_SLOP);
fuzzy=true;
          switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
          case CARAT:{
            jj_consume_token(CARAT);
            boost = jj_consume_token(NUMBER);
            break;
            }
          default:
            jj_la1[12] = jj_gen;
            ;
          }
          break;
          }
        default:
          jj_la1[13] = jj_gen;
          jj_consume_token(-1);
          throw new ParseException();
        }
        break;
        }
      default:
        jj_la1[14] = jj_gen;
        ;
      }
q = handleBareTokenQuery(field, term, fuzzySlop, prefix, wildcard, fuzzy, regexp);
      break;
      }
    case RANGEIN_START:
    case RANGEEX_START:{
      switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
      case RANGEIN_START:{
        jj_consume_token(RANGEIN_START);
startInc = true;
        break;
        }
      case RANGEEX_START:{
        jj_consume_token(RANGEEX_START);
        break;
        }
      default:
        jj_la1[15] = jj_gen;
        jj_consume_token(-1);
        throw new ParseException();
      }
      switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
      case RANGE_GOOP:{
        goop1 = jj_consume_token(RANGE_GOOP);
        break;
        }
      case RANGE_QUOTED:{
        goop1 = jj_consume_token(RANGE_QUOTED);
        break;
        }
      case RANGE_TO:{
        goop1 = jj_consume_token(RANGE_TO);
        break;
        }
      default:
        jj_la1[16] = jj_gen;
        jj_consume_token(-1);
        throw new ParseException();
      }
      jj_consume_token(RANGE_TO);
      switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
      case RANGE_GOOP:{
        goop2 = jj_consume_token(RANGE_GOOP);
        break;
        }
      case RANGE_QUOTED:{
        goop2 = jj_consume_token(RANGE_QUOTED);
        break;
        }
      case RANGE_TO:{
        goop2 = jj_consume_token(RANGE_TO);
        break;
        }
      default:
        jj_la1[17] = jj_gen;
        jj_consume_token(-1);
        throw new ParseException();
      }
      switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
      case RANGEIN_END:{
        jj_consume_token(RANGEIN_END);
endInc = true;
        break;
        }
      case RANGEEX_END:{
        jj_consume_token(RANGEEX_END);
        break;
        }
      default:
        jj_la1[18] = jj_gen;
        jj_consume_token(-1);
        throw new ParseException();
      }
      switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
      case CARAT:{
        jj_consume_token(CARAT);
        boost = jj_consume_token(NUMBER);
        break;
        }
      default:
        jj_la1[19] = jj_gen;
        ;
      }
boolean startOpen=false;
      boolean endOpen=false;
      if (goop1.kind == RANGE_QUOTED) {
        goop1.image = goop1.image.substring(1, goop1.image.length()-1);
      } else if ("*".equals(goop1.image)) {
        startOpen=true;
      }
      if (goop2.kind == RANGE_QUOTED) {
        goop2.image = goop2.image.substring(1, goop2.image.length()-1);
      } else if ("*".equals(goop2.image)) {
        endOpen=true;
      }
      q = getRangeQuery(field, startOpen ? null : discardEscapeChar(goop1.image), endOpen ? null : discardEscapeChar(goop2.image), startInc, endInc);
      break;
      }
    case QUOTED:{
      term = jj_consume_token(QUOTED);
      switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
      case CARAT:
      case FUZZY_SLOP:{
        switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
        case CARAT:{
          jj_consume_token(CARAT);
          boost = jj_consume_token(NUMBER);
          switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
          case FUZZY_SLOP:{
            fuzzySlop = jj_consume_token(FUZZY_SLOP);
fuzzy=true;
            break;
            }
          default:
            jj_la1[20] = jj_gen;
            ;
          }
          break;
          }
        case FUZZY_SLOP:{
          fuzzySlop = jj_consume_token(FUZZY_SLOP);
fuzzy=true;
          switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
          case CARAT:{
            jj_consume_token(CARAT);
            boost = jj_consume_token(NUMBER);
            break;
            }
          default:
            jj_la1[21] = jj_gen;
            ;
          }
          break;
          }
        default:
          jj_la1[22] = jj_gen;
          jj_consume_token(-1);
          throw new ParseException();
        }
        break;
        }
      default:
        jj_la1[23] = jj_gen;
        ;
      }
q = handleQuotedTerm(field, term, fuzzySlop);
      break;
      }
    default:
      jj_la1[24] = jj_gen;
      jj_consume_token(-1);
      throw new ParseException();
    }
{if ("" != null) return handleBoost(q, boost);}
    throw new Error("Missing return statement in function");
}

/** Returns the first query if splitOnWhitespace=true or otherwise the entire produced query */
  final public Query MultiTerm(String field, List<BooleanClause> clauses) throws ParseException {Token text, whitespace, followingText;
  Query firstQuery = null;
    text = jj_consume_token(TERM);
if (splitOnWhitespace) {
      firstQuery = getFieldQuery(field, discardEscapeChar(text.image), false);
      addClause(clauses, CONJ_NONE, MOD_NONE, firstQuery);
    }
    if (getToken(1).kind == TERM && allowedPostMultiTerm(getToken(2).kind)) {

    } else {
      jj_consume_token(-1);
      throw new ParseException();
    }
    label_2:
    while (true) {
      followingText = jj_consume_token(TERM);
if (splitOnWhitespace) {
        Query q = getFieldQuery(field, discardEscapeChar(followingText.image), false);
        addClause(clauses, CONJ_NONE, MOD_NONE, q);
      } else { // build up the text to send to analysis
        text.image += " " + followingText.image;
      }
      if (getToken(1).kind == TERM && allowedPostMultiTerm(getToken(2).kind)) {
        ;
      } else {
        break label_2;
      }
    }
if (splitOnWhitespace == false) {
      firstQuery = getFieldQuery(field, discardEscapeChar(text.image), false);
      addMultiTermClauses(clauses, firstQuery);
    }
    {if ("" != null) return firstQuery;}
    throw new Error("Missing return statement in function");
}

  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_2_3(int xla)
 {
    jj_la = xla; jj_lastpos = jj_scanpos = token;
    try { return (!jj_3_3()); }
    catch(LookaheadSuccess ls) { return true; }
    finally { jj_save(2, xla); }
  }

  private boolean jj_3R_6()
 {
    return false;
  }

  private boolean jj_3R_5()
 {
    if (jj_scan_token(STAR)) return true;
    if (jj_scan_token(COLON)) return true;
    return false;
  }

  private boolean jj_3R_4()
 {
    if (jj_scan_token(TERM)) return true;
    if (jj_scan_token(COLON)) return true;
    return false;
  }

  private boolean jj_3_2()
 {
    if (jj_3R_3()) return true;
    return false;
  }

  private boolean jj_3_1()
 {
    if (jj_3R_3()) return true;
    return false;
  }

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

  private boolean jj_3_3()
 {
    Token xsp;
    xsp = jj_scanpos;
    if (jj_3R_4()) {
    jj_scanpos = xsp;
    if (jj_3R_5()) return true;
    }
    return false;
  }

  private boolean jj_3R_3()
 {
    if (jj_scan_token(TERM)) return true;
    jj_lookingAhead = true;
    jj_semLA = getToken(1).kind == TERM && allowedPostMultiTerm(getToken(2).kind);
    jj_lookingAhead = false;
    if (!jj_semLA || jj_3R_6()) return true;
    Token xsp;
    if (jj_3R_7()) return true;
    while (true) {
      xsp = jj_scanpos;
      if (jj_3R_7()) { jj_scanpos = xsp; break; }
    }
    return false;
  }

  /** Generated Token Manager. */
  public QueryParserTokenManager token_source;
  /** 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;
  /** Whether we are looking ahead. */
  private boolean jj_lookingAhead = false;
  private boolean jj_semLA;
  private int jj_gen;
  final private int[] jj_la1 = new int[25];
  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[] {0x300,0x300,0x1c00,0x1c00,0xfda7c00,0xfda7f00,0xfda7f00,0x120000,0x40000,0xfda6000,0x9d22000,0x200000,0x40000,0x240000,0x240000,0x6000000,0x90000000,0x90000000,0x60000000,0x40000,0x200000,0x40000,0x240000,0x240000,0xfda2000,};
    }
    private static void jj_la1_init_1() {
       jj_la1_1 = new int[] {0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x1,0x1,0x0,0x0,0x0,0x0,0x0,0x0,0x0,};
    }
  final private JJCalls[] jj_2_rtns = new JJCalls[3];
  private boolean jj_rescan = false;
  private int jj_gc = 0;

  /** Constructor with user supplied CharStream. */
  protected QueryParser(CharStream stream) {
     token_source = new QueryParserTokenManager(stream);
     token = new Token();
     jj_ntk = -1;
     jj_gen = 0;
     for (int i = 0; i < 25; 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(CharStream stream) {
     token_source.ReInit(stream);
     token = new Token();
     jj_ntk = -1;
     jj_lookingAhead = false;
     jj_gen = 0;
     for (int i = 0; i < 25; 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. */
  protected QueryParser(QueryParserTokenManager tm) {
     token_source = tm;
     token = new Token();
     jj_ntk = -1;
     jj_gen = 0;
     for (int i = 0; i < 25; 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(QueryParserTokenManager tm) {
     token_source = tm;
     token = new Token();
     jj_ntk = -1;
     jj_gen = 0;
     for (int i = 0; i < 25; 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 = jj_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;
  }

  private int jj_ntk_f() {
     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<>();
  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];
       }

       for (int[] oldentry : jj_expentries) {
         if (oldentry.length == jj_expentry.length) {
           boolean isMatched = true;

           for (int i = 0; i < jj_expentry.length; i++) {
             if (oldentry[i] != jj_expentry[i]) {
               isMatched = false;
               break;
             }

           }
           if (isMatched) {
             jj_expentries.add(jj_expentry);
             break;
           }
         }
       }

       if (pos != 0) {
         jj_lasttokens[(jj_endpos = pos) - 1] = kind;
       }
     }
  }

  /** Generate ParseException. */
  public ParseException generateParseException() {
     jj_expentries.clear();
     boolean[] la1tokens = new boolean[33];
     if (jj_kind >= 0) {
       la1tokens[jj_kind] = true;
       jj_kind = -1;
     }
     for (int i = 0; i < 25; 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 < 33; 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);
  }

  private int trace_indent = 0;
  private boolean trace_enabled;

/** Trace enabled. */
  final public boolean trace_enabled() {
     return trace_enabled;
  }

  /** 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 < 3; 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;
               case 2: jj_3_3(); 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;
  }

}