gt:         String s = map.size() + "\n" + map.toString();
context: /*
   * Copyright (C) 1998, 2009  John Pritchard and the Alto Project Group.
   *
   * This program 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.
   * 
   * 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
   * General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
   * 02110-1301 USA.
   */
  /*
   * Copyright 1997-2006 Sun Microsystems, Inc.  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.  Sun designates this
   * particular file as subject to the "Classpath" exception as provided
   * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
   * CA 95054 USA or visit www.sun.com if you need additional information or
   * have any questions.
   */
  
  package alto.sec.pkcs;
  
  import java.io.IOException;
  import java.io.OutputStream;
  import java.security.cert.CertificateException;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.Enumeration;
  import java.util.Hashtable;
  
  import alto.sec.util.*;
  
  /**
   * This class defines the PKCS10 attributes for the request.
   * The ASN.1 syntax for this is:
   * <pre>
   * Attributes ::= SET OF Attribute
   * </pre>
   *
   * @author Amit Kapoor
   * @author Hemma Prafullchandra
   * @see PKCS10
   * @see PKCS10Attribute
   */
  public class PKCS10Attributes implements DerEncoder {
  
      private Hashtable<String, PKCS10Attribute> map =
                          new Hashtable<String, PKCS10Attribute>(3);
  
      /**
       * Default constructor for the PKCS10 attribute.
       */
      public PKCS10Attributes() { }
  
      /**
       * Create the object from the array of PKCS10Attribute objects.
       *
       * @param attrs the array of PKCS10Attribute objects.
       */
      public PKCS10Attributes(PKCS10Attribute[] attrs) {
          for (int i = 0; i < attrs.length; i++) {
              map.put(attrs[i].getAttributeId().toString(), attrs[i]);
          }
      }
  
      /**
       * Create the object, decoding the values from the passed DER stream.
       * The DER stream contains the SET OF Attribute.
       *
       * @param in the DerInputStream to read the attributes from.
       * @exception IOException on decoding errors.
       */
      public PKCS10Attributes(DerInputStream in) throws IOException {
          DerValue[] attrs = in.getSet(3, true);
  
          if (attrs == null)
              throw new IOException("Illegal encoding of attributes");
          for (int i = 0; i < attrs.length; i++) {
              PKCS10Attribute attr = new PKCS10Attribute(attrs[i]);
              map.put(attr.getAttributeId().toString(), attr);
          }
      }
  
      /**
       * Encode the attributes in DER form to the stream.
       *
       * @param out the OutputStream to marshal the contents to.
       * @exception IOException on encoding errors.
       */
      public void encode(OutputStream out) throws IOException {
          derEncode(out);
      }
  
      /**
       * Encode the attributes in DER form to the stream.
       * Implements the <code>DerEncoder</code> interface.
       *
       * @param out the OutputStream to marshal the contents to.
       * @exception IOException on encoding errors.
       */
      public void derEncode(OutputStream out) throws IOException {
          // first copy the elements into an array
          Collection<PKCS10Attribute> allAttrs = map.values();
          PKCS10Attribute[] attribs =
                  allAttrs.toArray(new PKCS10Attribute[map.size()]);
  
          DerOutputStream attrOut = new DerOutputStream();
          attrOut.putOrderedSetOf(DerValue.createTag(DerValue.TAG_CONTEXT,
                                                     true, (byte)0),
                                  attribs);
          out.write(attrOut.toByteArray());
      }
  
      /**
       * Set the attribute value.
       */
      public void setAttribute(String name, Object obj) {
          if (obj instanceof PKCS10Attribute) {
              map.put(name, (PKCS10Attribute)obj);
          }
      }
  
      /**
       * Get the attribute value.
       */
      public Object getAttribute(String name) {
          return map.get(name);
      }
  
      /**
       * Delete the attribute value.
       */
      public void deleteAttribute(String name) {
          map.remove(name);
      }
  
      /**
       * Return an enumeration of names of attributes existing within this
       * attribute.
       */
      public Enumeration<PKCS10Attribute> getElements() {
          return (map.elements());
      }
  
      /**
       * Return a Collection of attributes existing within this
       * PKCS10Attributes object.
       */
      public Collection<PKCS10Attribute> getAttributes() {
          return (Collections.unmodifiableCollection(map.values()));
      }
  
      /**
       * Compares this PKCS10Attributes for equality with the specified
       * object. If the <code>other</code> object is an
       * <code>instanceof</code> <code>PKCS10Attributes</code>, then
       * all the entries are compared with the entries from this.
       *
       * @param other the object to test for equality with this PKCS10Attributes.
       * @return true if all the entries match that of the Other,
       * false otherwise.
       */
      public boolean equals(Object other) {
          if (this == other)
              return true;
          if (!(other instanceof PKCS10Attributes))
              return false;
  
          Collection<PKCS10Attribute> othersAttribs =
                  ((PKCS10Attributes)other).getAttributes();
          PKCS10Attribute[] attrs =
              othersAttribs.toArray(new PKCS10Attribute[othersAttribs.size()]);
          int len = attrs.length;
          if (len != map.size())
              return false;
          PKCS10Attribute thisAttr, otherAttr;
          String key = null;
          for (int i=0; i < len; i++) {
              otherAttr = attrs[i];
              key = otherAttr.getAttributeId().toString();
  
              if (key == null)
                  return false;
              thisAttr = map.get(key);
              if (thisAttr == null)
                  return false;
              if (! thisAttr.equals(otherAttr))
                  return false;
          }
          return true;
      }
  
      /**
       * Returns a hashcode value for this PKCS10Attributes.
       *
       * @return the hashcode value.
       */
      public int hashCode() {
          return map.hashCode();
      }
  
      /**
       * Returns a string representation of this <tt>PKCS10Attributes</tt> object
       * in the form of a set of entries, enclosed in braces and separated
       * by the ASCII characters "<tt>,&nbsp;</tt>" (comma and space).
       * <p>Overrides the <tt>toString</tt> method of <tt>Object</tt>.
       *
       * @return  a string representation of this PKCS10Attributes.
       */
      public String toString() {
  