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Dynamic Dependency Injection with different ways to manage the resolver-strategy
/*
* Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
*
* This software is open source.
* See the bottom of this file for the licence.
*/
package org.dom4j.datatype;
import org.dom4j.Attribute;
import org.dom4j.Document;
import org.dom4j.DocumentFactory;
import org.dom4j.Element;
import org.dom4j.Namespace;
import org.dom4j.QName;
import org.dom4j.io.SAXReader;
import org.xml.sax.EntityResolver;
import org.xml.sax.InputSource;
/**
*
* DatatypeDocumentFactory is a factory of XML objects which
* support the XML Schema Data Types
* specification.
*
*
* @author James Strachan
* @version $Revision: 1.9 $
*/
public class DatatypeDocumentFactory extends DocumentFactory {
// XXXX: I don't think interning of QNames is necessary
private static final boolean DO_INTERN_QNAME = false;
/** The Singleton instance */
protected static transient DatatypeDocumentFactory singleton
= new DatatypeDocumentFactory();
private static final Namespace XSI_NAMESPACE = Namespace.get("xsi",
"http://www.w3.org/2001/XMLSchema-instance");
private static final QName XSI_SCHEMA_LOCATION = QName.get(
"schemaLocation", XSI_NAMESPACE);
private static final QName XSI_NO_SCHEMA_LOCATION = QName.get(
"noNamespaceSchemaLocation", XSI_NAMESPACE);
/** The builder of XML Schemas */
private SchemaParser schemaBuilder;
/** reader of XML Schemas */
private SAXReader xmlSchemaReader = new SAXReader();
/** If schemas are automatically loaded when parsing instance documents */
private boolean autoLoadSchema = true;
public DatatypeDocumentFactory() {
schemaBuilder = new SchemaParser(this);
}
/**
*
* Access to the singleton instance of this factory.
*
*
* @return the default singleon instance
*/
public static DocumentFactory getInstance() {
return singleton;
}
/**
* Loads the given XML Schema document into this factory so schema-aware
* Document, Elements and Attributes will be created by this factory.
*
* @param schemaDocument
* is an XML Schema Document instance.
*/
public void loadSchema(Document schemaDocument) {
schemaBuilder.build(schemaDocument);
}
public void loadSchema(Document schemaDocument, Namespace targetNamespace) {
schemaBuilder.build(schemaDocument, targetNamespace);
}
/**
* Registers the given DatatypeElementFactory for the given
* <element> schema element
*
* @param elementQName
* DOCUMENT ME!
*
* @return DOCUMENT ME!
*/
public DatatypeElementFactory getElementFactory(QName elementQName) {
DatatypeElementFactory result = null;
if (DO_INTERN_QNAME) {
elementQName = intern(elementQName);
}
DocumentFactory factory = elementQName.getDocumentFactory();
if (factory instanceof DatatypeElementFactory) {
result = (DatatypeElementFactory) factory;
}
return result;
}
// DocumentFactory methods
// -------------------------------------------------------------------------
public Attribute createAttribute(Element owner, QName qname, String value) {
if (autoLoadSchema && qname.equals(XSI_NO_SCHEMA_LOCATION)) {
Document document = (owner != null) ? owner.getDocument() : null;
loadSchema(document, value);
} else if (autoLoadSchema && qname.equals(XSI_SCHEMA_LOCATION)) {
Document document = (owner != null) ? owner.getDocument() : null;
String uri = value.substring(0, value.indexOf(' '));
Namespace namespace = owner.getNamespaceForURI(uri);
loadSchema(document, value.substring(value.indexOf(' ') + 1),
namespace);
}
return super.createAttribute(owner, qname, value);
}
// Implementation methods
// -------------------------------------------------------------------------
protected void loadSchema(Document document, String schemaInstanceURI) {
try {
EntityResolver resolver = document.getEntityResolver();
if (resolver == null) {
String msg = "No EntityResolver available for resolving URI: ";
throw new InvalidSchemaException(msg + schemaInstanceURI);
}
InputSource inputSource = resolver.resolveEntity(null,
schemaInstanceURI);
if (resolver == null) {
throw new InvalidSchemaException("Could not resolve the URI: "
+ schemaInstanceURI);
}
Document schemaDocument = xmlSchemaReader.read(inputSource);
loadSchema(schemaDocument);
} catch (Exception e) {
System.out.println("Failed to load schema: " + schemaInstanceURI);
System.out.println("Caught: " + e);
e.printStackTrace();
throw new InvalidSchemaException("Failed to load schema: "
+ schemaInstanceURI);
}
}
protected void loadSchema(Document document, String schemaInstanceURI,
Namespace namespace) {
try {
EntityResolver resolver = document.getEntityResolver();
if (resolver == null) {
String msg = "No EntityResolver available for resolving URI: ";
throw new InvalidSchemaException(msg + schemaInstanceURI);
}
InputSource inputSource = resolver.resolveEntity(null,
schemaInstanceURI);
if (resolver == null) {
throw new InvalidSchemaException("Could not resolve the URI: "
+ schemaInstanceURI);
}
Document schemaDocument = xmlSchemaReader.read(inputSource);
loadSchema(schemaDocument, namespace);
} catch (Exception e) {
System.out.println("Failed to load schema: " + schemaInstanceURI);
System.out.println("Caught: " + e);
e.printStackTrace();
throw new InvalidSchemaException("Failed to load schema: "
+ schemaInstanceURI);
}
}
}
/*
* 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 "DOM4J" must not be used to endorse or promote products derived
* from this Software without prior written permission of MetaStuff, Ltd. For
* written permission, please contact [email protected].
*
* 4. Products derived from this Software may not be called "DOM4J" nor may
* "DOM4J" appear in their names without prior written permission of MetaStuff,
* Ltd. DOM4J is a registered trademark of MetaStuff, Ltd.
*
* 5. Due credit should be given to the DOM4J Project - http://www.dom4j.org
*
* THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. 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 METASTUFF, LTD. OR ITS CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
*/