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Diffstat (limited to 'src/share/classes/com/sun/org/apache/xerces/internal/impl/dtd/models/CMNode.java')
| -rw-r--r-- | src/share/classes/com/sun/org/apache/xerces/internal/impl/dtd/models/CMNode.java | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/src/share/classes/com/sun/org/apache/xerces/internal/impl/dtd/models/CMNode.java b/src/share/classes/com/sun/org/apache/xerces/internal/impl/dtd/models/CMNode.java new file mode 100644 index 0000000..29bfc43 --- /dev/null +++ b/src/share/classes/com/sun/org/apache/xerces/internal/impl/dtd/models/CMNode.java @@ -0,0 +1,190 @@ +/* + * reserved comment block + * DO NOT REMOVE OR ALTER! + */ +/* + * The Apache Software License, Version 1.1 + * + * + * Copyright (c) 1999-2002 The Apache Software Foundation. All rights + * reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. The end-user documentation included with the redistribution, + * if any, must include the following acknowledgment: + * "This product includes software developed by the + * Apache Software Foundation (http://www.apache.org/)." + * Alternately, this acknowledgment may appear in the software itself, + * if and wherever such third-party acknowledgments normally appear. + * + * 4. The names "Xerces" and "Apache Software Foundation" must + * not be used to endorse or promote products derived from this + * software without prior written permission. For written + * permission, please contact apache@apache.org. + * + * 5. Products derived from this software may not be called "Apache", + * nor may "Apache" appear in their name, without prior written + * permission of the Apache Software Foundation. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR + * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * ==================================================================== + * + * This software consists of voluntary contributions made by many + * individuals on behalf of the Apache Software Foundation and was + * originally based on software copyright (c) 1999, International + * Business Machines, Inc., http://www.apache.org. For more + * information on the Apache Software Foundation, please see + * <http://www.apache.org/>. + */ + +package com.sun.org.apache.xerces.internal.impl.dtd.models; + +/** + * A content model node. + * + * @xerces.internal + * + */ +public abstract class CMNode +{ + // ------------------------------------------------------------------- + // Constructors + // ------------------------------------------------------------------- + public CMNode(int type) + { + fType = type; + } + + + // ------------------------------------------------------------------- + // Package, abstract methods + // ------------------------------------------------------------------- + // made this public so it could be implemented and used outside this package -neilg. + public abstract boolean isNullable() ; + + + // ------------------------------------------------------------------- + // Package final methods + // ------------------------------------------------------------------- + public final int type() + { + return fType; + } + + // made this public so it could be implemented and used outside this package -neilg. + public final CMStateSet firstPos() + { + if (fFirstPos == null) + { + fFirstPos = new CMStateSet(fMaxStates); + calcFirstPos(fFirstPos); + } + return fFirstPos; + } + + // made this public so it could be implemented and used outside this package -neilg. + public final CMStateSet lastPos() + { + if (fLastPos == null) + { + fLastPos = new CMStateSet(fMaxStates); + calcLastPos(fLastPos); + } + return fLastPos; + } + + final void setFollowPos(CMStateSet setToAdopt) + { + fFollowPos = setToAdopt; + } + + public final void setMaxStates(int maxStates) + { + fMaxStates = maxStates; + } + + /** + * Allows the user to set arbitrary data on this content model + * node. This is used by the a{n,m} optimization that runs + * in constant space. + */ + public void setUserData(Object userData) { + fUserData = userData; + } + + /** + * Allows the user to get arbitrary data set on this content + * model node. This is used by the a{n,m} optimization that runs + * in constant space. + */ + public Object getUserData() { + return fUserData; + } + + // ------------------------------------------------------------------- + // Protected, abstract methods + // ------------------------------------------------------------------- + protected abstract void calcFirstPos(CMStateSet toSet) ; + + protected abstract void calcLastPos(CMStateSet toSet) ; + + + // ------------------------------------------------------------------- + // Private data members + // + // fType + // The type of node. This indicates whether its a leaf or an + // operation. Though we also do derived classes for these types, + // it is too expensive to use runtime typing to find this out. + // This is one of the ContentSpecNode.NODE_XXX types. + // + // fFirstPos + // The set of NFA states that represent the entry states of this + // node in the DFA. + // + // fFollowPos + // The set of NFA states that can be gotten to from from this + // node in the DFA. + // + // fLastPos + // The set of NFA states that represent the final states of this + // node in the DFA. + // + // fMaxStates + // The maximum number of states that the NFA has, which means the + // max number of NFA states that have to be traced in the state + // sets during the building of the DFA. Its unfortunate that it + // has to be stored redundantly, but we need to fault in the + // state set members and they have to be sized to this size. We + // init to to -1 so it will cause an error if its used without + // being initialized. + // ------------------------------------------------------------------- + private int fType; + private CMStateSet fFirstPos = null; + private CMStateSet fFollowPos = null; + private CMStateSet fLastPos = null; + private int fMaxStates = -1; + private Object fUserData = null; +}; |