1. /*
  2. * The Apache Software License, Version 1.1
  3. *
  4. *
  5. * Copyright (c) 1999-2002 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 "Xerces" 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, International
  53. * Business Machines, Inc., http://www.apache.org. For more
  54. * information on the Apache Software Foundation, please see
  55. * <http://www.apache.org/>.
  56. */
  57. package com.sun.org.apache.xerces.internal.impl.xs.models;
  58. import com.sun.org.apache.xerces.internal.impl.dtd.models.CMNode;
  59. import com.sun.org.apache.xerces.internal.impl.dtd.models.CMStateSet;
  60. import com.sun.org.apache.xerces.internal.impl.xs.XSParticleDecl;
  61. /**
  62. *
  63. * Content model Uni-Op node.
  64. *
  65. * @author Neil Graham, IBM
  66. * @version $$
  67. */
  68. public class XSCMUniOp extends CMNode {
  69. // -------------------------------------------------------------------
  70. // Constructors
  71. // -------------------------------------------------------------------
  72. public XSCMUniOp(int type, CMNode childNode) {
  73. super(type);
  74. // Insure that its one of the types we require
  75. if ((type() != XSParticleDecl.PARTICLE_ZERO_OR_ONE)
  76. && (type() != XSParticleDecl.PARTICLE_ZERO_OR_MORE)
  77. && (type() != XSParticleDecl.PARTICLE_ONE_OR_MORE)) {
  78. throw new RuntimeException("ImplementationMessages.VAL_UST");
  79. }
  80. // Store the node and init any data that needs it
  81. fChild = childNode;
  82. }
  83. // -------------------------------------------------------------------
  84. // Package, final methods
  85. // -------------------------------------------------------------------
  86. final CMNode getChild() {
  87. return fChild;
  88. }
  89. // -------------------------------------------------------------------
  90. // Package, inherited methods
  91. // -------------------------------------------------------------------
  92. public boolean isNullable() {
  93. //
  94. // For debugging purposes, make sure we got rid of all non '*'
  95. // repetitions. Otherwise, '*' style nodes are always nullable.
  96. //
  97. if (type() == XSParticleDecl.PARTICLE_ONE_OR_MORE)
  98. return fChild.isNullable();
  99. else
  100. return true;
  101. }
  102. // -------------------------------------------------------------------
  103. // Protected, inherited methods
  104. // -------------------------------------------------------------------
  105. protected void calcFirstPos(CMStateSet toSet) {
  106. // Its just based on our child node's first pos
  107. toSet.setTo(fChild.firstPos());
  108. }
  109. protected void calcLastPos(CMStateSet toSet) {
  110. // Its just based on our child node's last pos
  111. toSet.setTo(fChild.lastPos());
  112. }
  113. // -------------------------------------------------------------------
  114. // Private data members
  115. //
  116. // fChild
  117. // This is the reference to the one child that we have for this
  118. // unary operation.
  119. // -------------------------------------------------------------------
  120. private CMNode fChild;
  121. } // XSCMUniOp