001: /*
002: * The Apache Software License, Version 1.1
003: *
004: *
005: * Copyright (c) 1999 The Apache Software Foundation. All rights
006: * reserved.
007: *
008: * Redistribution and use in source and binary forms, with or without
009: * modification, are permitted provided that the following conditions
010: * are met:
011: *
012: * 1. Redistributions of source code must retain the above copyright
013: * notice, this list of conditions and the following disclaimer.
014: *
015: * 2. Redistributions in binary form must reproduce the above copyright
016: * notice, this list of conditions and the following disclaimer in
017: * the documentation and/or other materials provided with the
018: * distribution.
019: *
020: * 3. The end-user documentation included with the redistribution,
021: * if any, must include the following acknowledgment:
022: * "This product includes software developed by the
023: * Apache Software Foundation (http://www.apache.org/)."
024: * Alternately, this acknowledgment may appear in the software itself,
025: * if and wherever such third-party acknowledgments normally appear.
026: *
027: * 4. The names "Xerces" and "Apache Software Foundation" must
028: * not be used to endorse or promote products derived from this
029: * software without prior written permission. For written
030: * permission, please contact apache@apache.org.
031: *
032: * 5. Products derived from this software may not be called "Apache",
033: * nor may "Apache" appear in their name, without prior written
034: * permission of the Apache Software Foundation.
035: *
036: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
037: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
038: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
039: * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
040: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
041: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
042: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
043: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
044: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
045: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
046: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
047: * SUCH DAMAGE.
048: * ====================================================================
049: *
050: * This software consists of voluntary contributions made by many
051: * individuals on behalf of the Apache Software Foundation and was
052: * originally based on software copyright (c) 1999, International
053: * Business Machines, Inc., http://www.apache.org. For more
054: * information on the Apache Software Foundation, please see
055: * <http://www.apache.org/>.
056: */
057:
058: package org.apache.xerces.validators.common;
059:
060: import org.apache.xerces.framework.XMLContentSpec;
061: import org.apache.xerces.utils.ImplementationMessages;
062:
063: /**
064: *
065: * @version
066: */
067: public class CMUniOp extends CMNode {
068: // -------------------------------------------------------------------
069: // Constructors
070: // -------------------------------------------------------------------
071: public CMUniOp(int type, CMNode childNode) throws CMException {
072: super (type);
073:
074: // Insure that its one of the types we require
075: if ((type() != XMLContentSpec.CONTENTSPECNODE_ZERO_OR_ONE)
076: && (type() != XMLContentSpec.CONTENTSPECNODE_ZERO_OR_MORE)
077: && (type() != XMLContentSpec.CONTENTSPECNODE_ONE_OR_MORE)) {
078: throw new CMException(ImplementationMessages.VAL_UST);
079: }
080:
081: // Store the node and init any data that needs it
082: fChild = childNode;
083: }
084:
085: // -------------------------------------------------------------------
086: // Package, final methods
087: // -------------------------------------------------------------------
088: final CMNode getChild() {
089: return fChild;
090: }
091:
092: // -------------------------------------------------------------------
093: // Package, inherited methods
094: // -------------------------------------------------------------------
095: boolean isNullable() throws CMException {
096: //
097: // For debugging purposes, make sure we got rid of all non '*'
098: // repetitions. Otherwise, '*' style nodes are always nullable.
099: //
100: if (type() == XMLContentSpec.CONTENTSPECNODE_ONE_OR_MORE)
101: return fChild.isNullable();
102: else
103: return true;
104: }
105:
106: // -------------------------------------------------------------------
107: // Protected, inherited methods
108: // -------------------------------------------------------------------
109: protected void calcFirstPos(CMStateSet toSet) throws CMException {
110: // Its just based on our child node's first pos
111: toSet.setTo(fChild.firstPos());
112: }
113:
114: protected void calcLastPos(CMStateSet toSet) throws CMException {
115: // Its just based on our child node's last pos
116: toSet.setTo(fChild.lastPos());
117: }
118:
119: // -------------------------------------------------------------------
120: // Private data members
121: //
122: // fChild
123: // This is the reference to the one child that we have for this
124: // unary operation.
125: // -------------------------------------------------------------------
126: private CMNode fChild;
127: };
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