org.apache.xerces.impl.xs.models.XSEmptyCM Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of xerces2-xsd11 Show documentation
Show all versions of xerces2-xsd11 Show documentation
A processor for parsing, validating, serializing and manipulating XML, written in Java
The newest version!
/*
* 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.xs.models;
import java.util.Collections;
import java.util.List;
import java.util.Vector;
import org.apache.xerces.impl.xs.SubstitutionGroupHandler;
import org.apache.xerces.impl.xs.XMLSchemaException;
import org.apache.xerces.impl.xs.XSConstraints;
import org.apache.xerces.impl.xs.XSElementDecl;
import org.apache.xerces.impl.xs.XSElementDeclHelper;
import org.apache.xerces.impl.xs.XSOpenContentDecl;
import org.apache.xerces.impl.xs.XSWildcardDecl;
import org.apache.xerces.xni.QName;
/**
* XSEmptyCM is a derivative of the abstract content model base class that
* handles a content model with no children (elements).
*
* This model validated on the way in.
*
* @xerces.internal
*
* @author Elena Litani, IBM
* @author Lisa Martin, IBM
* @version $Id$
*/
public class XSEmptyCM implements XSCMValidator, XS11CMRestriction.XS11CM {
//
// Constants
//
// start the content model: did not see any children
private static final short STATE_START = 0;
private static final Vector EMPTY = new Vector(0);
//
// Data
//
private final XSOpenContentDecl fOpenContent;
//
// Constructors
//
// Only one instance of an XSEmptyCM with no openContent will be created.
public XSEmptyCM() {
fOpenContent = null;
}
// This constructor will be called when the complexType is empty but
// contains openContent wildcard
public XSEmptyCM(XSOpenContentDecl openContent) {
fOpenContent = openContent;
}
//
// XSCMValidator methods
//
/**
* This methods to be called on entering a first element whose type
* has this content model. It will return the initial state of the content model
*
* @return Start state of the content model
*/
public int[] startContentModel(){
return (new int[] {STATE_START});
}
/**
* The method corresponds to one transaction in the content model.
*
* @param elementName the qualified name of the element
* @param currentState Current state
* @param subGroupHandler the substitution group handler
* @return element index corresponding to the element from the Schema grammar
*/
public Object oneTransition (QName elementName, int[] currentState, SubstitutionGroupHandler subGroupHandler, XSElementDeclHelper eDeclHelper){
// error state
if (currentState[0] < 0) {
currentState[0] = XSCMValidator.SUBSEQUENT_ERROR;
return null;
}
if (fOpenContent != null) {
if (allowExpandedName(fOpenContent.fWildcard, elementName, subGroupHandler, eDeclHelper)) {
return fOpenContent;
}
}
currentState[0] = XSCMValidator.FIRST_ERROR;
return null;
}
/**
* The method indicates the end of list of children
*
* @param currentState Current state of the content model
* @return true if the last state was a valid final state
*/
public boolean endContentModel (int[] currentState){
int state = currentState[0];
// restore content model state:
// error
if (state < 0) {
return false;
}
return true;
}
/**
* check whether this content violates UPA constraint.
*
* @param subGroupHandler the substitution group handler
* @param xsConstraints the XML Schema Constraint checker
* @return true if this content model contains other or list wildcard
*/
public boolean checkUniqueParticleAttribution(SubstitutionGroupHandler subGroupHandler, XSConstraints xsConstraints) throws XMLSchemaException {
return false;
}
/**
* Check which elements are valid to appear at this point. This method also
* works if the state is in error, in which case it returns what should
* have been seen.
*
* @param state the current state
* @return a Vector whose entries are instances of
* either XSWildcardDecl or XSElementDecl.
*/
public Vector whatCanGoHere(int[] state) {
return EMPTY;
}
public int [] occurenceInfo(int[] state) {
return null;
}
public String getTermName(int termId) {
return null;
}
public boolean isCompactedForUPA() {
return false;
}
public XSElementDecl nextElementTransition(int[] s, int[] sn, int[] index) {
return null;
}
public XSWildcardDecl nextWildcardTransition(int[] s, int[] sn, int[] index) {
sn[0] = s[0];
if (fOpenContent == null) {
return null;
}
if (index[0] == -1) {
index[0] = 0;
return fOpenContent.fWildcard;
}
index[0] = -1;
return null;
}
public boolean isOpenContent(XSWildcardDecl w) {
return fOpenContent != null && fOpenContent.fWildcard == w;
}
public boolean allowExpandedName(XSWildcardDecl wildcard,
QName curElem, SubstitutionGroupHandler subGroupHandler,
XSElementDeclHelper eDeclHelper) {
if (wildcard.allowQName(curElem)) {
if (wildcard.fDisallowedDefined && eDeclHelper.getGlobalElementDecl(curElem) != null) {
return false;
}
return true;
}
return false;
}
public List getDefinedNames(SubstitutionGroupHandler subGroupHandler) {
return Collections.EMPTY_LIST;
}
public void optimizeStates(XS11CMRestriction.XS11CM base, int[] b, int[] d, int indexb) {
}
public XSOpenContentDecl getOpenContent() {
return fOpenContent;
}
public XSElementDecl findMatchingElemDecl(QName elementName, SubstitutionGroupHandler subGroupHandler) {
return null;
}
} // class XSEmptyCM