/**
* Redistribution and use of this software and associated documentation
* ("Software"), with or without modification, are permitted provided
* that the following conditions are met:
*
* 1. Redistributions of source code must retain copyright
* statements and notices. Redistributions must also contain a
* copy of this document.
*
* 2. Redistributions in binary form must reproduce the
* above copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* 3. The name "Exolab" must not be used to endorse or promote
* products derived from this Software without prior written
* permission of Intalio, Inc. For written permission,
* please contact info@exolab.org.
*
* 4. Products derived from this Software may not be called "Exolab"
* nor may "Exolab" appear in their names without prior written
* permission of Intalio, Inc. Exolab is a registered
* trademark of Intalio, Inc.
*
* 5. Due credit should be given to the Exolab Project
* (http://www.exolab.org/).
*
* THIS SOFTWARE IS PROVIDED BY INTALIO, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
* NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* INTALIO, INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Copyright 1999-2002 (C) Intalio, Inc. All Rights Reserved.
*
* $Id$
*/
package org.exolab.castor.xml.schema.reader;
//-- imported classes and packages
import org.exolab.castor.xml.AttributeSet;
import org.exolab.castor.xml.Namespaces;
import org.exolab.castor.xml.XMLException;
import org.exolab.castor.xml.schema.Annotation;
import org.exolab.castor.xml.schema.ElementDecl;
import org.exolab.castor.xml.schema.Group;
import org.exolab.castor.xml.schema.ModelGroup;
import org.exolab.castor.xml.schema.Order;
import org.exolab.castor.xml.schema.Schema;
import org.exolab.castor.xml.schema.SchemaContext;
import org.exolab.castor.xml.schema.SchemaException;
import org.exolab.castor.xml.schema.SchemaNames;
import org.exolab.castor.xml.schema.Wildcard;
/**
* A class for Unmarshalling ModelGroups
* @author <a href="mailto:kvisco@intalio.com">Keith Visco</a>
* @version $Revision$ $Date: 2005-12-13 14:58:48 -0700 (Tue, 13 Dec 2005) $
**/
public class GroupUnmarshaller extends ComponentReader {
//--------------------------/
//- Static Class Variables -/
//--------------------------/
/**
* The value of the maximum occurance wild card
*/
private static final String MAX_OCCURS_WILDCARD = "unbounded";
//--------------------/
//- Member Variables -/
//--------------------/
/**
* The current ComponentReader
**/
private ComponentReader unmarshaller;
/**
* The current branch depth
**/
private int depth = 0;
/**
* The ModelGroup reference for the ModelGroup we are constructing
**/
private Group _group = null;
/**
* The Schema being "unmarshalled"
**/
private Schema _schema = null;
/**
* The element name of the Group to be unmarshalled.
**/
private String _element = SchemaNames.SEQUENCE;
private boolean foundAll = false;
private boolean foundElement = false;
private boolean foundGroup = false;
private boolean foundModelGroup = false;
private boolean foundAnnotation = false;
//----------------/
//- Constructors -/
//----------------/
/**
* Creates a new GroupUnmarshaller.
* @param schemaContext the {@link SchemaContext} to get some configuration settings from
* @param schema the Schema to which the Group belongs
* @param element the element name for this type of group
* @param atts the AttributeList
**/
public GroupUnmarshaller(
final SchemaContext schemaContext,
final Schema schema,
final String element,
final AttributeSet atts) {
super(schemaContext);
this._schema = schema;
_group = new Group();
//-- handle attributes
String attValue = null;
if (SchemaNames.SEQUENCE.equals(element)) {
_group.setOrder(Order.sequence);
}
else if (SchemaNames.CHOICE.equals(element)) {
_group.setOrder(Order.choice);
}
else if (SchemaNames.ALL.equals(element)) {
foundAll = true;
_group.setOrder(Order.all);
}
else {
String err = "Invalid group element name: '" +
element + "'";
throw new IllegalArgumentException(err);
}
_element = element;
//-- set name
attValue = atts.getValue(SchemaNames.NAME_ATTR);
if (attValue != null) {
_group.setName(attValue);
}
/*
* @maxOccurs
* If maxOccurs is present, the value is either unbounded
* or the int value of the attribute, otherwise maxOccurs
* equals the minOccurs value.
*/
attValue = atts.getValue(SchemaNames.MAX_OCCURS_ATTR);
if (attValue != null) {
if (MAX_OCCURS_WILDCARD.equals(attValue))
_group.setMaxOccurs(-1);
else
_group.setMaxOccurs(toInt(attValue));
}
//-- minOccurs
attValue = atts.getValue("minOccurs");
if (attValue != null)
_group.setMinOccurs(toInt(attValue));
if (_group.getOrder() == Order.all) {
if (_group.getMaxOccurs() != 1) {
String err = "Wrong maxOccurs value for a <all>:"+_group.getMaxOccurs();
err += "\n1 is the only possible value.";
throw new IllegalArgumentException(err);
}
if (_group.getMinOccurs() > 1) {
String err = "Wrong minOccurs value for a <all>:"+_group.getMinOccurs();
err += "\n0 or 1 are the only possible values.";
throw new IllegalArgumentException(err);
}
}
//-- id
_group.setId(atts.getValue("id"));
} //-- GroupUnmarshaller
//-----------/
//- Methods -/
//-----------/
/**
* Returns the name of the element that this ComponentReader
* handles
* @return the name of the element that this ComponentReader
* handles
**/
public String elementName() {
return _element;
} //-- elementName
/**
* Returns the Group that was unmarshalled by this Unmarshaller.
* This method should only be called after unmarshalling
* has been completed.
*
* @return the unmarshalled Group
**/
public Group getGroup() {
return _group;
} //-- getGroup
/**
* Returns the Object created by this ComponentReader
* @return the Object created by this ComponentReader
**/
public Object getObject() {
return getGroup();
} //-- getObject
/**
* Signals the start of an element with the given name.
*
* @param name the NCName of the element. It is an error
* if the name is a QName (ie. contains a prefix).
* @param namespace the namespace of the element. This may be null.
* Note: A null namespace is not the same as the default namespace unless
* the default namespace is also null.
* @param atts the AttributeSet containing the attributes associated
* with the element.
* @param nsDecls the namespace declarations being declared for this
* element. This may be null.
**/
public void startElement(String name, String namespace, AttributeSet atts,
Namespaces nsDecls)
throws XMLException
{
//-- Do delagation if necessary
if (unmarshaller != null) {
unmarshaller.startElement(name, namespace, atts, nsDecls);
++depth;
return;
}
if (SchemaNames.ANNOTATION.equals(name)) {
if (foundElement || foundGroup ||foundModelGroup)
error("An annotation may only appear as the first child "+
"of an element definition.");
if (foundAnnotation)
error("Only one (1) 'annotation' is allowed as a child of "+
"element definitions.");
foundAnnotation = true;
unmarshaller = new AnnotationUnmarshaller(getSchemaContext(), atts);
}
else if (SchemaNames.ELEMENT.equals(name)) {
foundElement = true;
unmarshaller
= new ElementUnmarshaller(getSchemaContext(), _schema, atts);
}
//--group
else if (name.equals(SchemaNames.GROUP))
{
foundModelGroup = true;
unmarshaller
= new ModelGroupUnmarshaller(getSchemaContext(), _schema, atts);
}
//--all, sequence, choice
else if ( (SchemaNames.isGroupName(name)) && (name != SchemaNames.GROUP) )
{
foundGroup = true;
if (SchemaNames.ALL.equals(name))
foundAll = true;
unmarshaller
= new GroupUnmarshaller(getSchemaContext(), _schema, name, atts);
}
//--any
else if (SchemaNames.ANY.equals(name)) {
if (foundAll)
error("<any> can not appear as a child of a <all> element");
unmarshaller
= new WildcardUnmarshaller(getSchemaContext(), _group, _schema, name, atts);
}
else {
StringBuffer err = new StringBuffer("illegal element <");
err.append(name);
err.append("> found in <group>.");
throw new SchemaException(err.toString());
}
} //-- startElement
/**
* Signals to end of the element with the given name.
*
* @param name the NCName of the element. It is an error
* if the name is a QName (ie. contains a prefix).
* @param namespace the namespace of the element.
**/
public void endElement(String name, String namespace)
throws XMLException
{
//-- Do delagation if necessary
if ((unmarshaller != null) && (depth > 0)) {
unmarshaller.endElement(name, namespace);
--depth;
return;
}
//-- check for name mismatches
if (unmarshaller != null) {
if (!name.equals(unmarshaller.elementName())) {
String err = "missing end element for ";
err += unmarshaller.elementName();
throw new SchemaException(err);
}
}
//-- have unmarshaller perform any necessary clean up
unmarshaller.finish();
//-- <any>
if (SchemaNames.ANY.equals(name)) {
Wildcard wildcard =
((WildcardUnmarshaller)unmarshaller).getWildcard();
try {
_group.addWildcard(wildcard);
} catch (SchemaException e) {
throw new IllegalArgumentException(e.getMessage());
}
}
if (SchemaNames.ANNOTATION.equals(name)) {
Annotation ann = (Annotation)unmarshaller.getObject();
_group.addAnnotation(ann);
}
else if (SchemaNames.ELEMENT.equals(name)) {
ElementDecl element = (ElementDecl) unmarshaller.getObject();
_group.addElementDecl(element);
}
else if (name.equals(SchemaNames.GROUP)) {
ModelGroup group = (ModelGroup) unmarshaller.getObject();
_group.addGroup(group);
}
else if ( (SchemaNames.isGroupName(name)) && (name != SchemaNames.GROUP) )
{
Group group = ((GroupUnmarshaller)unmarshaller).getGroup();
_group.addGroup(group);
}
unmarshaller = null;
} //-- endElement
public void characters(char[] ch, int start, int length)
throws XMLException
{
//-- Do delagation if necessary
if (unmarshaller != null) {
unmarshaller.characters(ch, start, length);
}
} //-- characters
} //-- GroupUnmarshaller