/*
 * Copyright (c) 2005, 2006, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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 General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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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 org.xml.sax.Locator;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;

public class RefPattern extends Pattern {
  private Pattern p;
  private Locator refLoc;
  private String name;
  private int checkRecursionDepth = -1;
  private boolean combineImplicit = false;
  private byte combineType = COMBINE_NONE;
  private byte replacementStatus = REPLACEMENT_KEEP;
  private boolean expanded = false;

  static final byte REPLACEMENT_KEEP = 0;
  static final byte REPLACEMENT_REQUIRE = 1;
  static final byte REPLACEMENT_IGNORE = 2;

  static final byte COMBINE_NONE = 0;
  static final byte COMBINE_CHOICE = 1;
  static final byte COMBINE_INTERLEAVE = 2;

  RefPattern(String name) {
    this.name = name;
  }

  Pattern getPattern() {
    return p;
  }
  
  void setPattern(Pattern p) {
    this.p = p;
  }

  Locator getRefLocator() {
    return refLoc;
  }
  
  void setRefLocator(Locator loc) {
    this.refLoc = loc;
  }
  
  void checkRecursion(int depth) throws SAXException {
    if (checkRecursionDepth == -1) {
      checkRecursionDepth = depth;
      p.checkRecursion(depth);
      checkRecursionDepth = -2;
    }
    else if (depth == checkRecursionDepth)
      // XXX try to recover from this?
      throw new SAXParseException(SchemaBuilderImpl.localizer.message("recursive_reference", name),
				  refLoc);
  }

  Pattern expand(SchemaPatternBuilder b) {
    if (!expanded) {
      p = p.expand(b);
      expanded = true;
    }
    return p;
  }

  boolean samePattern(Pattern other) {
    return false;
  }

  public void accept(PatternVisitor visitor) {
    p.accept(visitor);
  }

  public Object apply(PatternFunction f) {
    return f.caseRef(this);
  }

  byte getReplacementStatus() {
    return replacementStatus;
  }
  
  void setReplacementStatus(byte replacementStatus) {
    this.replacementStatus = replacementStatus;
  }

  boolean isCombineImplicit() {
    return combineImplicit;
  }

  void setCombineImplicit() {
    combineImplicit = true;
  }

  byte getCombineType() {
    return combineType;
  }

  void setCombineType(byte combineType) {
    this.combineType = combineType;
  }

  String getName() {
    return name;
  }
}