/*
 * Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
 *
 * This file is part of Resin(R) Open Source
 *
 * Each copy or derived work must preserve the copyright notice and this
 * notice unmodified.
 *
 * Resin Open Source is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Resin Open Source 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, or any warranty
 * of NON-INFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Resin Open Source; if not, write to the
 *   Free SoftwareFoundation, Inc.
 *   59 Temple Place, Suite 330
 *   Boston, MA 02111-1307  USA
 *
 * @author Scott Ferguson
 */

package com.caucho.xml.stream;

import java.io.IOException;
import static javax.xml.XMLConstants.*;
import org.w3c.dom.*;
import com.caucho.vfs.WriteStream;

/**
 * Binding to a namespace URL.
 */
final class NamespaceBinding
{
  private String _prefix;
  
  private String _uri;
  
  private int _version;

  // namespaces are only emitted (written) when writeNamespace() or
  // writeDefaultNamespace() is called explicitly.
  private boolean _emit = false;

  NamespaceBinding(String prefix, String uri, int version)
  {
    _prefix = prefix;
    _uri = uri;
    _version = version;
  }

  String getUri()
  {
    return _uri;
  }

  void setUri(String uri)
  {
    _uri = uri;
  }
  
  void setVersion(int version)
  {
    _version = version;
  }

  int getVersion()
  {
    return _version;
  }

  String getPrefix()
  {
    return _prefix;
  }

  void setPrefix(String prefix)
  {
    _prefix = prefix;
  }

  void emit(WriteStream ws)
    throws IOException
  {
    if (_emit) {
      if (DEFAULT_NS_PREFIX.equals(_prefix)) {
        ws.print(" ");
        ws.print(XMLNS_ATTRIBUTE);
      }
      else {
        ws.print(" ");
        ws.print(XMLNS_ATTRIBUTE);
        ws.print(":");
        ws.print(Escapifier.escape(_prefix));
      }

      ws.print("=\"");
      ws.print(Escapifier.escape(_uri));
      ws.print('"');

      _emit = false;
    }
  }

  boolean isEmit()
  {
    return _emit;
  }

  void setEmit(boolean emit)
  {
    _emit = emit;
  }

  public String toString()
  {
    return "NamespaceBinding[prefix=" + _prefix + 
                           ",uri=" + _uri + 
                           ",version=" + _version + 
                           ",emit=" + _emit + "]";
  }
}