xmlparser.java

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                skipWhitespace();
              }
          }
        else if (tryRead("IGNORE"))
          {
            skipWhitespace();
            require('[');
            expandPE = false;
            for (int nesting = 1; nesting > 0; )
              {
                int c = readCh();
                switch (c)
                  {
                  case 0x3c: // '<'
                    if (tryRead("!["))
                      nesting++;
                    break;
                  case 0x5d: // ']'
                    if (tryRead("]>"))
                      nesting--;
                    break;
                  case -1:
                    throw new EOFException();
                  }
              }
            expandPE = saved;
          }
        else
          error("conditional section must begin with INCLUDE or IGNORE");
      }
    else
      error("expected markup declaration");
  }

  /**
   * Parse the elementdecl production.
   */
  private void readElementDecl()
    throws IOException, XMLStreamException
  {
    requireWhitespace();
    boolean saved = expandPE;
    expandPE = (inputStack.size() > 1);
    String name = readNmtoken(true);
    expandPE = saved;
    requireWhitespace();
    readContentspec(name);
    skipWhitespace();
    require('>');
  }

  /**
   * Parse the contentspec production.
   */
  private void readContentspec(String elementName)
    throws IOException, XMLStreamException
  {
    if (tryRead("EMPTY"))
      doctype.addElementDecl(elementName, "EMPTY", new EmptyContentModel());
    else if (tryRead("ANY"))
      doctype.addElementDecl(elementName, "ANY", new AnyContentModel());
    else
      {
        ContentModel model;
        StringBuffer acc = new StringBuffer();
        require('(');
        acc.append('(');
        skipWhitespace();
        if (tryRead("#PCDATA"))
          {
            // mixed content
            acc.append("#PCDATA");
            MixedContentModel mm = new MixedContentModel();
            model = mm;
            skipWhitespace();
            if (tryRead(')'))
              {
                acc.append(")");
                if (tryRead('*'))
                  {
                    mm.min = 0;
                    mm.max = -1;
                  }
              }
            else
              {
                while (!tryRead(")"))
                  {
                    require('|');
                    acc.append('|');
                    skipWhitespace();
                    String name = readNmtoken(true);
                    acc.append(name);
                    mm.addName(name);
                    skipWhitespace();
                  }
                require('*');
                acc.append(")*");
                mm.min = 0;
                mm.max = -1;
              }
          }
        else
          model = readElements(acc);
        doctype.addElementDecl(elementName, acc.toString(), model);
      }
  }

  /**
   * Parses an element content model.
   */
  private ElementContentModel readElements(StringBuffer acc)
    throws IOException, XMLStreamException
  {
    int separator;
    ElementContentModel model = new ElementContentModel();
    
    // Parse first content particle
    skipWhitespace();
    model.addContentParticle(readContentParticle(acc));
    // End or separator
    skipWhitespace();
    int c = readCh();
    switch (c)
      {
      case 0x29: // ')'
        acc.append(')');
        mark(1);
        c = readCh();
        switch (c)
          {
          case 0x3f: // '?'
            acc.append('?');
            model.min = 0;
            model.max = 1;
            break;
          case 0x2a: // '*'
            acc.append('*');
            model.min = 0;
            model.max = -1;
            break;
          case 0x2b: // '+'
            acc.append('+');
            model.min = 1;
            model.max = -1;
            break;
          default:
            reset();
          }
        return model; // done
      case 0x7c: // '|'
        model.or = true;
        // fall through
      case 0x2c: // ','
        separator = c;
        acc.append(Character.toChars(c));
        break;
      default:
        error("bad separator in content model",
              "U+" + Integer.toHexString(c));
        return model;
      }
    // Parse subsequent content particles
    while (true)
      {
        skipWhitespace();
        model.addContentParticle(readContentParticle(acc));
        skipWhitespace();
        c = readCh();
        if (c == 0x29) // ')'
          {
            acc.append(')');
            break;
          }
        else if (c != separator)
          {
            error("bad separator in content model",
                  "U+" + Integer.toHexString(c));
            return model;
          }
        else
          acc.append(c);
      }
    // Check for occurrence indicator
    mark(1);
    c = readCh();
    switch (c)
      {
      case 0x3f: // '?'
        acc.append('?');
        model.min = 0;
        model.max = 1;
        break;
      case 0x2a: // '*'
        acc.append('*');
        model.min = 0;
        model.max = -1;
        break;
      case 0x2b: // '+'
        acc.append('+');
        model.min = 1;
        model.max = -1;
        break;
      default:
        reset();
      }
    return model;
  }

  /**
   * Parse a cp production.
   */
  private ContentParticle readContentParticle(StringBuffer acc)
    throws IOException, XMLStreamException
  {
    ContentParticle cp = new ContentParticle();
    if (tryRead('('))
      {
        acc.append('(');
        cp.content = readElements(acc);
      }
    else
      {
        String name = readNmtoken(true);
        acc.append(name);
        cp.content = name;
        mark(1);
        int c = readCh();
        switch (c)
          {
          case 0x3f: // '?'
            acc.append('?');
            cp.min = 0;
            cp.max = 1;
            break;
          case 0x2a: // '*'
            acc.append('*');
            cp.min = 0;
            cp.max = -1;
            break;
          case 0x2b: // '+'
            acc.append('+');
            cp.min = 1;
            cp.max = -1;
            break;
          default:
            reset();
          }
      }
    return cp;
  }

  /**
   * Parse an attribute-list definition.
   */
  private void readAttlistDecl()
    throws IOException, XMLStreamException
  {
    requireWhitespace();
    boolean saved = expandPE;
    expandPE = (inputStack.size() > 1);
    String elementName = readNmtoken(true);
    expandPE = saved;
    boolean white = tryWhitespace();
    while (!tryRead('>'))
      {
        if (!white)
          error("whitespace required before attribute definition");
        readAttDef(elementName);
        white = tryWhitespace();
      }
  }

  /**
   * Parse a single attribute definition.
   */
  private void readAttDef(String elementName)
    throws IOException, XMLStreamException
  {
    String name = readNmtoken(true);
    requireWhitespace();
    StringBuffer acc = new StringBuffer();
    HashSet values = new HashSet();
    String type = readAttType(acc, values);
    if (validating)
      {
        if ("ID".equals(type))
          {
            // VC: One ID per Element Type
            for (Iterator i = doctype.attlistIterator(elementName);
                 i.hasNext(); )
              {
                Map.Entry entry = (Map.Entry) i.next();
                AttributeDecl decl = (AttributeDecl) entry.getValue();
                if ("ID".equals(decl.type))
                  error("element types must not have more than one ID " +
                        "attribute");
              }
          }
        else if ("NOTATION".equals(type))
          {
            // VC: One Notation Per Element Type
            for (Iterator i = doctype.attlistIterator(elementName);
                 i.hasNext(); )
              {
                Map.Entry entry = (Map.Entry) i.next();
                AttributeDecl decl = (AttributeDecl) entry.getValue();
                if ("NOTATION".equals(decl.type))
                  error("element types must not have more than one NOTATION " +
                        "attribute");
              }
            // VC: No Notation on Empty Element
            ContentModel model = doctype.getElementModel(elementName);
            if (model != null && model.type == ContentModel.EMPTY)
              error("attributes of type NOTATION must not be declared on an " +
                    "element declared EMPTY");
          }
      }
    String enumer = null;
    if ("ENUMERATION".equals(type) || "NOTATION".equals(type))
      enumer = acc.toString();
    else
      values = null;
    requireWhitespace();
    readDefault(elementName, name, type, enumer, values);
  }

  /**
   * Parse an attribute type.
   */
  private String readAttType(StringBuffer acc, HashSet values)
    throws IOException, XMLStreamException
  {
    if (tryRead('('))
      {
        readEnumeration(false, acc, values);
        return "ENUMERATION";
      }
    else
      {
        String typeString = readNmtoken(true);
        if ("NOTATION".equals(typeString))
          {
            readNotationType(acc, values);
            return typeString;
          }
        else if ("CDATA".equals(typeString) ||
                 "ID".equals(typeString) ||
                 "IDREF".equals(typeString) ||
                 "IDREFS".equals(typeString) ||
                 "ENTITY".equals(typeString) ||
                 "ENTITIES".equals(typeString) ||
                 "NMTOKEN".equals(typeString) ||
                 "NMTOKENS".equals(typeString))
          return typeString;
        else
          {
            error("illegal attribute type", typeString);
            return null;
          }
      }
  }

  /**
   * Parse an enumeration.
   */
  private void readEnumeration(boolean isNames, StringBuffer acc,
                               HashSet values)
    throws IOException, XMLStreamException
  {
    acc.append('(');
    // first token
    skipWhitespace();
    String token = readNmtoken(isNames);
    acc.append(token);
    values.add(token);
    // subsequent tokens
    skipWhitespace();
    while (!tryRead(')'))
      {
        require('|');
        acc.append('|');
        skipWhitespace();
        token = readNmtoken(isNames);
        // VC: No Duplicate Tokens
        if (validating && values.contains(token))
          error("duplicate token", token);
        acc.append(token);
        values.add(token);
        skipWhitespace();
      }
    acc.append(')');
  }

  /**
   * Parse a notation type for an attribute.
   */
  private void readNotationType(StringBuffer acc, HashSet values)
    throws IOException, XMLStreamException
  {
    requireWhitespace();
    require('(');
    readEnumeration(true, acc, values);
  }

  /**
   * Parse the default value for an attribute.
   */
  private void readDefault(String elementName, String name,
                           String type, String enumeration, HashSet values)
    throws IOException, XMLStreamException
  {
    int valueType = ATTRIBUTE_DEFAULT_SPECIFIED;
    int flags = LIT_ATTRIBUTE;
    String value = null, defaultType = null;
    boolean saved = expandPE;
    
    if (!"CDATA".equals(type))
      flags |= LIT_NORMALIZE;

    expandPE = false;
    if (tryRead('#'))
      {
        if (tryRead("FIXED"))
          {
            defaultType = "#FIXED";
            valueType = ATTRIBUTE_DEFAULT_FIXED;
            requireWhitespace();
            value = readLiteral(flags, false);
          }
        else if (tryRead("REQUIRED"))
          {
            defaultType = "#REQUIRED";
            valueType = ATTRIBUTE_DEFAULT_REQUIRED;
          }
        else if (tryRead("IMPLIED"))
          {
            defaultType = "#IMPLIED";
            valueType = ATTRIBUTE_DEFAULT_IMPLIED;
          }
        else
          error("illegal keyword for attribute default value");
      }
    else
      value = readLiteral(flags, false);
    expandPE = saved;
    if (validating)
      {
        if ("ID".equals(type))
          {
            // VC: Attribute Default Value Syntactically Correct
            if (value != null && !isNmtoken(value, true))
              error("default value must match Name production", value);
            // VC: ID Attribute Default
            if (valueType != ATTRIBUTE_DEFAULT_REQUIRED &&
                valueType != ATTRIBUTE_DEFAULT_IMPLIED)
              error("ID attributes must have a declared default of " +
                    "#IMPLIED or #REQUIRED");
          }
        else if (value != null)
          {
            // VC: Attribute Default Value Syntacti