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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

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/*

 * Copyright (C) 2004-2011

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to deal

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 * copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

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 */

package com.sun.xml.internal.rngom.binary;

import com.sun.xml.internal.rngom.binary.visitor.PatternFunction;

import com.sun.xml.internal.rngom.binary.visitor.PatternVisitor;

import com.sun.xml.internal.rngom.nc.NameClass;

import org.xml.sax.Locator;

import org.xml.sax.SAXException;

public final class ElementPattern extends Pattern {

  private Pattern p;

  private NameClass origNameClass;

  private NameClass nameClass;

  private boolean expanded = false;

  private boolean checkedRestrictions = false;

  private Locator loc;

  ElementPattern(NameClass nameClass, Pattern p, Locator loc) {

    super(false,

          ELEMENT_CONTENT_TYPE,

          combineHashCode(ELEMENT_HASH_CODE,

                          nameClass.hashCode(),

                          p.hashCode()));

    this.nameClass = nameClass;

    this.origNameClass = nameClass;

    this.p = p;

    this.loc = loc;

  }

    @Override

  void checkRestrictions(int context, DuplicateAttributeDetector dad, Alphabet alpha)

    throws RestrictionViolationException {

    if (alpha != null)

      alpha.addElement(origNameClass);

    if (checkedRestrictions)

      return;

    switch (context) {

    case DATA_EXCEPT_CONTEXT:

      throw new RestrictionViolationException("data_except_contains_element");

    case LIST_CONTEXT:

      throw new RestrictionViolationException("list_contains_element");

    case ATTRIBUTE_CONTEXT:

      throw new RestrictionViolationException("attribute_contains_element");

    }

    checkedRestrictions = true;

    try {

      p.checkRestrictions(ELEMENT_CONTEXT, new DuplicateAttributeDetector(), null);

    }

    catch (RestrictionViolationException e) {

      checkedRestrictions = false;

      e.maybeSetLocator(loc);

      throw e;

    }

  }

    @Override

  Pattern expand(SchemaPatternBuilder b) {

    if (!expanded) {

      expanded = true;

      p = p.expand(b);

      if (p.isNotAllowed())

        nameClass = NameClass.NULL;

    }

    return this;

  }

  boolean samePattern(Pattern other) {

    if (!(other instanceof ElementPattern))

      return false;

    ElementPattern ep = (ElementPattern)other;

    return nameClass.equals(ep.nameClass) && p == ep.p;

  }

    @Override

  void checkRecursion(int depth) throws SAXException {

    p.checkRecursion(depth + 1);

  }

  public void accept(PatternVisitor visitor) {

    visitor.visitElement(nameClass, p);

  }

  public Object apply(PatternFunction f) {

    return f.caseElement(this);

  }

  void setContent(Pattern p) {

    this.p = p;

  }

  public Pattern getContent() {

    return p;

  }

  public NameClass getNameClass() {

    return nameClass;

  }

  public Locator getLocator() {

    return loc;

  }

}