/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 * This code is free software; you can redistribute it and/or modify it

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 * published by the Free Software Foundation.  Oracle designates this

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 * by Oracle in the LICENSE file that accompanied this code.

 *

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 * 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

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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

 * in the Software without restriction, including without limitation the rights

 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

 * 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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 * THE SOFTWARE.

 */

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

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

import org.xml.sax.Locator;

public class SchemaPatternBuilder extends PatternBuilder {

  private boolean idTypes;

  private final Pattern unexpandedNotAllowed =

        new NotAllowedPattern() {

        @Override

        boolean isNotAllowed() {

            return false;

        }

        @Override

        Pattern expand(SchemaPatternBuilder b) {

            return b.makeNotAllowed();

        }

    };

  private final TextPattern text = new TextPattern();

  private final PatternInterner schemaInterner = new PatternInterner();

  public SchemaPatternBuilder() { }

  public boolean hasIdTypes() {

    return idTypes;

  }

  Pattern makeElement(NameClass nameClass, Pattern content, Locator loc) {

    Pattern p = new ElementPattern(nameClass, content, loc);

    return schemaInterner.intern(p);

  }

  Pattern makeAttribute(NameClass nameClass, Pattern value, Locator loc) {

    if (value == notAllowed)

      return value;

    Pattern p = new AttributePattern(nameClass, value, loc);

    return schemaInterner.intern(p);

  }

  Pattern makeData(Datatype dt) {

    noteDatatype(dt);

    Pattern p = new DataPattern(dt);

    return schemaInterner.intern(p);

  }

  Pattern makeDataExcept(Datatype dt, Pattern except, Locator loc) {

    noteDatatype(dt);

    Pattern p = new DataExceptPattern(dt, except, loc);

    return schemaInterner.intern(p);

  }

  Pattern makeValue(Datatype dt, Object obj) {

    noteDatatype(dt);

    Pattern p = new ValuePattern(dt, obj);

    return schemaInterner.intern(p);

  }

  Pattern makeText() {

    return text;

  }

    @Override

  Pattern makeOneOrMore(Pattern p) {

    if (p == text)

      return p;

    return super.makeOneOrMore(p);

  }

  Pattern makeUnexpandedNotAllowed() {

    return unexpandedNotAllowed;

  }

  Pattern makeError() {

    Pattern p = new ErrorPattern();

    return schemaInterner.intern(p);

  }

    @Override

  Pattern makeChoice(Pattern p1, Pattern p2) {

    if (p1 == notAllowed || p1 == p2)

      return p2;

    if (p2 == notAllowed)

      return p1;

    return super.makeChoice(p1, p2);

  }

  Pattern makeList(Pattern p, Locator loc) {

    if (p == notAllowed)

      return p;

    Pattern p1 = new ListPattern(p, loc);

    return schemaInterner.intern(p1);

  }

  Pattern makeMixed(Pattern p) {

    return makeInterleave(text, p);

  }

  private void noteDatatype(Datatype dt) {

    if (dt.getIdType() != Datatype.ID_TYPE_NULL)

      idTypes = true;

  }

}