| /* |
| * reserved comment block |
| * DO NOT REMOVE OR ALTER! |
| */ |
| /* |
| * 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.xs.models; |
| |
| import com.sun.org.apache.xerces.internal.impl.dtd.models.CMNode; |
| import com.sun.org.apache.xerces.internal.impl.dtd.models.CMStateSet; |
| |
| /** |
| * Content model leaf node. |
| * |
| * @xerces.internal |
| * |
| * @author Neil Graham, IBM |
| */ |
| public class XSCMLeaf |
| extends CMNode { |
| |
| // |
| // Data |
| // |
| |
| /** This is the leaf: element decl or wildcard decl. */ |
| private Object fLeaf = null; |
| |
| /** |
| * Identify the particle: for UPA checking |
| */ |
| private int fParticleId = -1; |
| |
| /** |
| * Part of the algorithm to convert a regex directly to a DFA |
| * numbers each leaf sequentially. If its -1, that means its an |
| * epsilon node. Zero and greater are non-epsilon positions. |
| */ |
| private int fPosition = -1; |
| |
| // |
| // Constructors |
| // |
| |
| /** Constructs a content model leaf. */ |
| public XSCMLeaf(int type, Object leaf, int id, int position) { |
| super(type); |
| |
| // Store the element index and position |
| fLeaf = leaf; |
| fParticleId = id; |
| fPosition = position; |
| } |
| |
| // |
| // Package methods |
| // |
| |
| final Object getLeaf() { |
| return fLeaf; |
| } |
| |
| final int getParticleId() { |
| return fParticleId; |
| } |
| |
| final int getPosition() { |
| return fPosition; |
| } |
| |
| final void setPosition(int newPosition) { |
| fPosition = newPosition; |
| } |
| |
| // |
| // CMNode methods |
| // |
| |
| // package |
| |
| public boolean isNullable() { |
| // Leaf nodes are never nullable unless its an epsilon node |
| return (fPosition == -1); |
| } |
| |
| public String toString() { |
| StringBuffer strRet = new StringBuffer(fLeaf.toString()); |
| if (fPosition >= 0) { |
| strRet.append |
| ( |
| " (Pos:" |
| + Integer.toString(fPosition) |
| + ")" |
| ); |
| } |
| return strRet.toString(); |
| } |
| |
| // protected |
| |
| protected void calcFirstPos(CMStateSet toSet) { |
| // If we are an epsilon node, then the first pos is an empty set |
| if (fPosition == -1) |
| toSet.zeroBits(); |
| |
| // Otherwise, its just the one bit of our position |
| else |
| toSet.setBit(fPosition); |
| } |
| |
| protected void calcLastPos(CMStateSet toSet) { |
| // If we are an epsilon node, then the last pos is an empty set |
| if (fPosition == -1) |
| toSet.zeroBits(); |
| |
| // Otherwise, its just the one bit of our position |
| else |
| toSet.setBit(fPosition); |
| } |
| |
| } // class XSCMLeaf |