| /* |
| * Copyright (c) 2006, 2009, Oracle and/or its affiliates. All rights reserved. |
| */ |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| 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; |
| } |
| |
| public boolean isCompactedForUPA() { |
| return fCompactedForUPA; |
| } |
| |
| public void setIsCompactUPAModel(boolean value) { |
| fCompactedForUPA = value; |
| } |
| |
| /** |
| * 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 final int fType; |
| private CMStateSet fFirstPos = null; |
| private CMStateSet fFollowPos = null; |
| private CMStateSet fLastPos = null; |
| private int fMaxStates = -1; |
| private Object fUserData = null; |
| /* |
| * This boolean is true if the model represented by the CMNode does not represent |
| * the true model from the schema, but has had its min/maxOccurs modified for a |
| * more compact representation (for purposes of UPA). |
| */ |
| private boolean fCompactedForUPA = false; |
| }; |