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A processor for parsing, validating, serializing and manipulating XML, written in Java
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/*
* 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 org.apache.xerces.impl.dtd.models;
import org.apache.xerces.impl.dtd.XMLContentSpec;
/**
* Content model Uni-Op node.
*
* @xerces.internal
*
* @version $Id$
*/
public class CMUniOp extends CMNode
{
// -------------------------------------------------------------------
// Constructors
// -------------------------------------------------------------------
public CMUniOp(int type, CMNode childNode)
{
super(type);
// Insure that its one of the types we require
if ((type() != XMLContentSpec.CONTENTSPECNODE_ZERO_OR_ONE)
&& (type() != XMLContentSpec.CONTENTSPECNODE_ZERO_OR_MORE)
&& (type() != XMLContentSpec.CONTENTSPECNODE_ONE_OR_MORE))
{
throw new RuntimeException("ImplementationMessages.VAL_UST");
}
// Store the node and init any data that needs it
fChild = childNode;
}
// -------------------------------------------------------------------
// Package, final methods
// -------------------------------------------------------------------
final CMNode getChild()
{
return fChild;
}
// -------------------------------------------------------------------
// Package, inherited methods
// -------------------------------------------------------------------
public boolean isNullable()
{
//
// For debugging purposes, make sure we got rid of all non '*'
// repetitions. Otherwise, '*' style nodes are always nullable.
//
if (type() == XMLContentSpec.CONTENTSPECNODE_ONE_OR_MORE)
return fChild.isNullable();
else
return true;
}
// -------------------------------------------------------------------
// Protected, inherited methods
// -------------------------------------------------------------------
protected void calcFirstPos(CMStateSet toSet)
{
// Its just based on our child node's first pos
toSet.setTo(fChild.firstPos());
}
protected void calcLastPos(CMStateSet toSet)
{
// Its just based on our child node's last pos
toSet.setTo(fChild.lastPos());
}
// -------------------------------------------------------------------
// Private data members
//
// fChild
// This is the reference to the one child that we have for this
// unary operation.
// -------------------------------------------------------------------
private final CMNode fChild;
};