/*
 * 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;

public class ListPattern extends Pattern {
  Pattern p;
  Locator locator;

  ListPattern(Pattern p, Locator locator) {
    super(false,
	  DATA_CONTENT_TYPE,
	  combineHashCode(LIST_HASH_CODE, p.hashCode()));
    this.p = p;
    this.locator = locator;
  }

  Pattern expand(SchemaPatternBuilder b) {
    Pattern ep = p.expand(b);
    if (ep != p)
      return b.makeList(ep, locator);
    else
      return this;
  }

  void checkRecursion(int depth) throws SAXException {
    p.checkRecursion(depth);
  }

  boolean samePattern(Pattern other) {
    return (other instanceof ListPattern
	    && p == ((ListPattern)other).p);
  }

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

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

  void checkRestrictions(int context, DuplicateAttributeDetector dad, Alphabet alpha)
    throws RestrictionViolationException {
    switch (context) {
    case DATA_EXCEPT_CONTEXT:
      throw new RestrictionViolationException("data_except_contains_list");
    case START_CONTEXT:
      throw new RestrictionViolationException("start_contains_list");
    case LIST_CONTEXT:
      throw new RestrictionViolationException("list_contains_list");
    }
    try {
      p.checkRestrictions(LIST_CONTEXT, dad, null);
    }
    catch (RestrictionViolationException e) {
      e.maybeSetLocator(locator);
      throw e;
    }
  }
  
  Pattern getOperand() {
    return p;
  }
}
