Re-add CQLLexer#main

[cql-java-moved-to-github.git] / src / main / java / org / z3950 / zing / cql / CQLLexerSimple.java

diff --git a/src/main/java/org/z3950/zing/cql/CQLLexerSimple.java b/src/main/java/org/z3950/zing/cql/CQLLexerSimple.java
deleted file mode 100644 (file)
index 80931cc..0000000
--- a/src/main/java/org/z3950/zing/cql/CQLLexerSimple.java
+++ /dev/null
@@ -1,173 +0,0 @@
-/*
- * Copyright (c) 1995-2014, Index Datassss
- * All rights reserved.
- * See the file LICENSE for details.
- */
-package org.z3950.zing.cql;
-
-/**
- *
- * @author jakub
- */
-public class CQLLexerSimple implements CQLLexer {
-  private String qs;
-  private int qi;
-  private int ql;
-  private int what = TT_NOTHING;
-  private String val;
-  private String lval;
-  private StringBuilder buf = new StringBuilder();
-
-  public CQLLexerSimple(String cql, boolean debug) {
-    qs = cql;
-    ql = cql.length();
-  }
-
-  @Override
-  public void move() {
-    //eat whitespace
-    while (qi < ql && strchr(" \t\r\n", qs.charAt(qi)))
-      qi++;
-    //eof
-    if (qi == ql) {
-      what = TT_EOF;
-      return;
-    }
-    //current char
-    char c = qs.charAt(qi);
-    //separators
-    if (strchr("()/", c)) {
-      what = c;
-      qi++;
-    //comparitor
-    } else if (strchr("<>=", c)) {
-      what = c;
-      qi++;
-      //two-char comparitor
-      if (qi < ql) {
-        char d = qs.charAt(qi);
-        String comp = String.valueOf((char) c) + String.valueOf((char) d);
-        if (comp.equals("==")) {
-          what = TT_EQEQ;
-          qi++;
-        }
-        else if (comp.equals("<=")) {
-          what = TT_LE;
-          qi++;
-        }
-        else if (comp.equals(">=")) {
-          what = TT_GE;
-          qi++;
-        }
-        else if (comp.equals("<>")) {
-          what = TT_NE;
-          qi++;
-        }
-      }
-    //quoted string
-    } else if (strchr("\"", c)) { //no single-quotes
-      what = '"';
-      //remember quote char
-      char mark = c;
-      qi++;
-      boolean escaped = false;
-      buf.setLength(0); //reset buffer
-      while (qi < ql) {
-        if (!escaped && qs.charAt(qi) == mark) //terminator
-          break;
-        if (escaped && strchr("*?^\\", qs.charAt(qi))) //no escaping for d-quote
-          buf.append("\\");
-        if (!escaped && qs.charAt(qi) == '\\') { //escape-char
-          escaped = true;
-          qi++;
-          continue;
-        }
-        escaped = false; //reset escape
-        buf.append(qs.charAt(qi));
-        qi++;
-      }
-      val = buf.toString();
-      lval = val.toLowerCase();
-      if (qi < ql)
-        qi++;
-      else //unterminated
-        what = TT_EOF; //notify error
-      //unquoted string
-    } else {
-      what = TT_WORD;
-      buf.setLength(0); //reset buffer
-      while (qi < ql
-        && !strchr("()/<>= \t\r\n", qs.charAt(qi))) {
-        buf.append(qs.charAt(qi));
-        qi++;
-      }
-      val = buf.toString();
-      lval = val.toLowerCase();
-      if (lval.equals("or")) what = TT_OR;
-      else if (lval.equals("and")) what = TT_AND;
-      else if (lval.equals("not")) what = TT_NOT;
-      else if (lval.equals("prox")) what = TT_PROX;
-      else if (lval.equals("sortby")) what = TT_SORTBY;
-    }
-  }
-
-  private boolean strchr(String s, char ch) {
-    return s.indexOf(ch) >= 0;
-  }
-
-  @Override
-  public String value() {
-    return val;
-  }
-
-  @Override
-  public int what() {
-    return what;
-  }
-
-  @Override
-  public String render() {
-    return render(what, true);
-  }
-
-  @Override
-  public String render(int token, boolean quoteChars) {
-    switch (token) {
-      case TT_EOF:
-        return "EOF";
-      case TT_WORD:
-        return "word: " + val;
-      case '"':
-        return "string: \"" + val + "\"";
-      case TT_LE:
-        return "<=";
-      case TT_GE:
-        return ">=";
-      case TT_NE:
-        return "<>";
-      case TT_EQEQ:
-        return "==";
-      case TT_AND:
-        return "and";
-      case TT_NOT:
-        return "not";
-      case TT_OR:
-        return "or";
-      case TT_PROX:
-        return "prox";
-      case TT_SORTBY:
-        return "sortby";
-      default:
-        //a single character, such as '(' or '/' or relation
-        String res = String.valueOf((char) token);
-        if (quoteChars)
-          res = "'" + res + "'";
-        return res;
-    }
-  }
-
-  @Override
-  public int pos() {
-    return qi;
-  }
-}