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Xerces2 is the next generation of high performance, fully compliant XML parsers in the Apache Xerces family.
This new version of Xerces introduces the Xerces Native Interface (XNI), a complete framework for building
parser components and configurations that is extremely modular and easy to program. The Apache Xerces2 parser is
the reference implementation of XNI but other parser components, configurations, and parsers can be written
using the Xerces Native Interface. For complete design and implementation documents, refer to the XNI Manual.
Xerces2 is a fully conforming XML Schema 1.0 processor. A partial experimental implementation of the XML Schema
1.1 Structures and Datatypes Working Drafts (December 2009) and an experimental implementation of the XML Schema
Definition Language (XSD): Component Designators (SCD) Candidate Recommendation (January 2010) are provided for
evaluation. For more information, refer to the XML Schema page. Xerces2 also provides a complete implementation
of the Document Object Model Level 3 Core and Load/Save W3C Recommendations and provides a complete
implementation of the XML Inclusions (XInclude) W3C Recommendation. It also provides support for OASIS XML
Catalogs v1.1. Xerces2 is able to parse documents written according to the XML 1.1 Recommendation, except that
it does not yet provide an option to enable normalization checking as described in section 2.13 of this
specification. It also handles namespaces according to the XML Namespaces 1.1 Recommendation, and will correctly
serialize XML 1.1 documents if the DOM level 3 load/save APIs are in use.
/*
* 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;
import org.apache.xerces.impl.xs.util.XSObjectListImpl;
import org.apache.xerces.xs.XSConstants;
import org.apache.xerces.xs.XSNamespaceItem;
import org.apache.xerces.xs.XSObjectList;
import org.apache.xerces.xs.XSParticle;
import org.apache.xerces.xs.XSTerm;
/**
* Store schema particle declaration.
*
* @xerces.internal
*
* @author Sandy Gao, IBM
*
* @version $Id: XSParticleDecl.java 965250 2010-07-18 16:04:58Z mrglavas $
*/
public class XSParticleDecl implements XSParticle {
// types of particles
public static final short PARTICLE_EMPTY = 0;
public static final short PARTICLE_ELEMENT = 1;
public static final short PARTICLE_WILDCARD = 2;
public static final short PARTICLE_MODELGROUP = 3;
public static final short PARTICLE_ZERO_OR_MORE = 4;
public static final short PARTICLE_ZERO_OR_ONE = 5;
public static final short PARTICLE_ONE_OR_MORE = 6;
// type of the particle
public short fType = PARTICLE_EMPTY;
// term of the particle
// for PARTICLE_ELEMENT : the element decl
// for PARTICLE_WILDCARD: the wildcard decl
// for PARTICLE_MODELGROUP: the model group
public XSTerm fValue = null;
// minimum occurrence of this particle
public int fMinOccurs = 1;
// maximum occurrence of this particle
public int fMaxOccurs = 1;
// optional annotation
public XSObjectList fAnnotations = null;
// clone this decl
public XSParticleDecl makeClone() {
XSParticleDecl particle = new XSParticleDecl();
particle.fType = fType;
particle.fMinOccurs = fMinOccurs;
particle.fMaxOccurs = fMaxOccurs;
particle.fDescription = fDescription;
particle.fValue = fValue;
particle.fAnnotations = fAnnotations;
return particle;
}
/**
* 3.9.6 Schema Component Constraint: Particle Emptiable
* whether this particle is emptible
*/
public boolean emptiable() {
return minEffectiveTotalRange() == 0;
}
// whether this particle contains nothing
public boolean isEmpty() {
if (fType == PARTICLE_EMPTY)
return true;
if (fType == PARTICLE_ELEMENT || fType == PARTICLE_WILDCARD)
return false;
return ((XSModelGroupImpl)fValue).isEmpty();
}
/**
* 3.8.6 Effective Total Range (all and sequence) and
* Effective Total Range (choice)
* The following methods are used to return min/max range for a particle.
* They are not exactly the same as it's described in the spec, but all the
* values from the spec are retrievable by these methods.
*/
public int minEffectiveTotalRange() {
if (fType == XSParticleDecl.PARTICLE_EMPTY) {
return 0;
}
if (fType == PARTICLE_MODELGROUP) {
return ((XSModelGroupImpl)fValue).minEffectiveTotalRange() * fMinOccurs;
}
return fMinOccurs;
}
public int maxEffectiveTotalRange() {
if (fType == XSParticleDecl.PARTICLE_EMPTY) {
return 0;
}
if (fType == PARTICLE_MODELGROUP) {
int max = ((XSModelGroupImpl)fValue).maxEffectiveTotalRange();
if (max == SchemaSymbols.OCCURRENCE_UNBOUNDED)
return SchemaSymbols.OCCURRENCE_UNBOUNDED;
if (max != 0 && fMaxOccurs == SchemaSymbols.OCCURRENCE_UNBOUNDED)
return SchemaSymbols.OCCURRENCE_UNBOUNDED;
return max * fMaxOccurs;
}
return fMaxOccurs;
}
/**
* get the string description of this particle
*/
private String fDescription = null;
public String toString() {
if (fDescription == null) {
StringBuffer buffer = new StringBuffer();
appendParticle(buffer);
if (!(fMinOccurs == 0 && fMaxOccurs == 0 ||
fMinOccurs == 1 && fMaxOccurs == 1)) {
buffer.append('{').append(fMinOccurs);
if (fMaxOccurs == SchemaSymbols.OCCURRENCE_UNBOUNDED)
buffer.append("-UNBOUNDED");
else if (fMinOccurs != fMaxOccurs)
buffer.append('-').append(fMaxOccurs);
buffer.append('}');
}
fDescription = buffer.toString();
}
return fDescription;
}
/**
* append the string description of this particle to the string buffer
* this is for error message.
*/
void appendParticle(StringBuffer buffer) {
switch (fType) {
case PARTICLE_EMPTY:
buffer.append("EMPTY");
break;
case PARTICLE_ELEMENT:
buffer.append(fValue.toString());
break;
case PARTICLE_WILDCARD:
buffer.append('(');
buffer.append(fValue.toString());
buffer.append(')');
break;
case PARTICLE_MODELGROUP:
buffer.append(fValue.toString());
break;
}
}
public void reset(){
fType = PARTICLE_EMPTY;
fValue = null;
fMinOccurs = 1;
fMaxOccurs = 1;
fDescription = null;
fAnnotations = null;
}
/**
* Get the type of the object, i.e ELEMENT_DECLARATION.
*/
public short getType() {
return XSConstants.PARTICLE;
}
/**
* The name of this XSObject depending on the
* XSObject type.
*/
public String getName() {
return null;
}
/**
* The namespace URI of this node, or null if it is
* unspecified. defines how a namespace URI is attached to schema
* components.
*/
public String getNamespace() {
return null;
}
/**
* {min occurs} determines the minimum number of terms that can occur.
*/
public int getMinOccurs() {
return fMinOccurs;
}
/**
* {max occurs} whether the maxOccurs value is unbounded.
*/
public boolean getMaxOccursUnbounded() {
return fMaxOccurs == SchemaSymbols.OCCURRENCE_UNBOUNDED;
}
/**
* {max occurs} determines the maximum number of terms that can occur.
*/
public int getMaxOccurs() {
return fMaxOccurs;
}
/**
* {term} One of a model group, a wildcard, or an element declaration.
*/
public XSTerm getTerm() {
return fValue;
}
/**
* @see org.apache.xerces.xs.XSObject#getNamespaceItem()
*/
public XSNamespaceItem getNamespaceItem() {
return null;
}
/**
* Optional. Annotations.
*/
public XSObjectList getAnnotations() {
return (fAnnotations != null) ? fAnnotations : XSObjectListImpl.EMPTY_LIST;
}
} // class XSParticleDecl