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Java printing library for CUPS/IPP

There is a newer version: 0.7.9

package ch.ethz.vppserver.ippclient;

/**
 * Copyright (C) 2012 Harald Weyhing
 * 
 * This program is free software; you can redistribute it and/or modify it under the terms of the
 * GNU Lesser General Public License as published by the Free Software Foundation; either version 3
 * of the License, or (at your option) any later version.
 * 
 * This program 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 Lesser General Public License for more details. You should have received a copy of
 * the GNU Lesser General Public License along with this program; if not, see
 * .
 */
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

import org.cups4j.ipp.attributes.AttributeGroup;
import org.cups4j.ipp.attributes.AttributeList;
import org.cups4j.ipp.attributes.Tag;
import org.cups4j.ipp.attributes.TagList;
import org.simpleframework.xml.Serializer;
import org.simpleframework.xml.core.Persister;

public class IppAttributeProvider implements IIppAttributeProvider {

  private static IppAttributeProvider INSTANCE = new IppAttributeProvider();
  private List tagList = new ArrayList();
  private List attributeGroupList = new ArrayList();

  public static IppAttributeProvider getInstance() {
    return INSTANCE;
  }

  private IppAttributeProvider() {
    try {
      InputStream tagListStream = IIppAttributeProvider.class.getClassLoader().getResourceAsStream(TAG_LIST_FILENAME);
      InputStream attListStream = IIppAttributeProvider.class.getClassLoader().getResourceAsStream(
          ATTRIBUTE_LIST_FILENAME);

      Serializer serializer = new Persister();
      TagList tList = serializer.read(TagList.class, tagListStream);
      tagList = tList.getTag();

      AttributeList aList = serializer.read(AttributeList.class, attListStream);
      attributeGroupList = aList.getAttributeGroup();
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }

  /**
   * 
   * @return
   */
  public List getTagList() {
    return tagList;
  }

  /**
   * 
   * @return
   */
  public List getAttributeGroupList() {
    return attributeGroupList;
  }

}