1. /*
  2. * The Apache Software License, Version 1.1
  3. *
  4. *
  5. * Copyright (c) 1999 The Apache Software Foundation. All rights
  6. * reserved.
  7. *
  8. * Redistribution and use in source and binary forms, with or without
  9. * modification, are permitted provided that the following conditions
  10. * are met:
  11. *
  12. * 1. Redistributions of source code must retain the above copyright
  13. * notice, this list of conditions and the following disclaimer.
  14. *
  15. * 2. Redistributions in binary form must reproduce the above copyright
  16. * notice, this list of conditions and the following disclaimer in
  17. * the documentation and/or other materials provided with the
  18. * distribution.
  19. *
  20. * 3. The end-user documentation included with the redistribution,
  21. * if any, must include the following acknowledgment:
  22. * "This product includes software developed by the
  23. * Apache Software Foundation (http://www.apache.org/)."
  24. * Alternately, this acknowledgment may appear in the software itself,
  25. * if and wherever such third-party acknowledgments normally appear.
  26. *
  27. * 4. The names "Xalan" and "Apache Software Foundation" must
  28. * not be used to endorse or promote products derived from this
  29. * software without prior written permission. For written
  30. * permission, please contact apache@apache.org.
  31. *
  32. * 5. Products derived from this software may not be called "Apache",
  33. * nor may "Apache" appear in their name, without prior written
  34. * permission of the Apache Software Foundation.
  35. *
  36. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
  37. * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  38. * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  39. * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
  40. * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  41. * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  42. * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  43. * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  44. * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  45. * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  46. * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  47. * SUCH DAMAGE.
  48. * ====================================================================
  49. *
  50. * This software consists of voluntary contributions made by many
  51. * individuals on behalf of the Apache Software Foundation and was
  52. * originally based on software copyright (c) 1999, Lotus
  53. * Development Corporation., http://www.lotus.com. For more
  54. * information on the Apache Software Foundation, please see
  55. * <http://www.apache.org/>.
  56. */
  57. package org.apache.xalan.serialize;
  58. import javax.xml.transform.OutputKeys;
  59. import java.util.Enumeration;
  60. import java.util.Hashtable;
  61. import java.util.Properties;
  62. import java.util.StringTokenizer;
  63. import java.io.IOException;
  64. import java.io.InputStream;
  65. import org.apache.xalan.templates.OutputProperties;
  66. import org.apache.xml.utils.WrappedRuntimeException;
  67. /**
  68. * Factory for creating serializers.
  69. */
  70. public abstract class SerializerFactory
  71. {
  72. /*
  73. * Associates output methods to serializer classes.
  74. * (Don't use this right now. -sb
  75. */
  76. // private static Hashtable _serializers = new Hashtable();
  77. /**
  78. * Associates output methods to default output formats.
  79. */
  80. private static Hashtable _formats = new Hashtable();
  81. /**
  82. * Returns a serializer for the specified output method. Returns
  83. * null if no implementation exists that supports the specified
  84. * output method. For a list of the default output methods see
  85. * {@link Method}.
  86. *
  87. * @param format The output format
  88. * @return A suitable serializer, or null
  89. * @throws IllegalArgumentException (apparently -sc) if method is
  90. * null or an appropriate serializer can't be found
  91. * @throws WrappedRuntimeException (apparently -sc) if an
  92. * exception is thrown while trying to find serializer
  93. */
  94. public static Serializer getSerializer(Properties format)
  95. {
  96. Serializer ser = null;
  97. try
  98. {
  99. Class cls;
  100. String method = format.getProperty(OutputKeys.METHOD);
  101. if (method == null)
  102. throw new IllegalArgumentException(
  103. "The output format has a null method name");
  104. cls = null; // (Class)_serializers.get(method);
  105. if (cls == null)
  106. {
  107. String className =
  108. format.getProperty(OutputProperties.S_KEY_CONTENT_HANDLER);
  109. if (null == className)
  110. {
  111. throw new IllegalArgumentException(
  112. "The output format must have a '"
  113. + OutputProperties.S_KEY_CONTENT_HANDLER + "' property!");
  114. }
  115. cls = Class.forName(className);
  116. // _serializers.put(method, cls);
  117. }
  118. ser = (Serializer) cls.newInstance();
  119. ser.setOutputFormat(format);
  120. }
  121. catch (Exception e)
  122. {
  123. throw new org.apache.xml.utils.WrappedRuntimeException(e);
  124. }
  125. return ser;
  126. }
  127. }