/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Emil Ong, Adam Megacz
*/
package com.caucho.jaxb.property;
import java.io.IOException;
import java.util.ArrayList;
import static javax.xml.XMLConstants.*;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import javax.xml.bind.UnmarshalException;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamWriter;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import com.caucho.jaxb.BinderImpl;
import com.caucho.jaxb.JAXBUtil;
import com.caucho.jaxb.NodeIterator;
import com.caucho.jaxb.mapping.Namer;
import com.caucho.jaxb.mapping.XmlMapping;
import com.caucho.jaxb.skeleton.ClassSkeleton;
import com.caucho.util.L10N;
import com.caucho.xml.stream.StaxUtil;
/**
* helper class for properties that are represented as a "flat" CDATA block
*/
public abstract class CDataProperty extends Property {
public static final L10N L = new L10N(CDataProperty.class);
protected boolean _isNullable = true;
protected abstract Object read(String in)
throws IOException, JAXBException;
public String getMinOccurs()
{
if (_isNullable)
return "0";
return null;
}
public Object readAttribute(XMLStreamReader in, int i)
throws IOException, JAXBException
{
return read(in.getAttributeValue(i));
}
public Object read(Unmarshaller u, XMLStreamReader in, Object previous)
throws IOException, XMLStreamException, JAXBException
{
return read(u, in, previous, null, null);
}
public Object read(Unmarshaller u, XMLStreamReader in, Object previous,
ClassSkeleton attributed, Object parent)
throws IOException, XMLStreamException, JAXBException
{
// Read any attributes that might represent fields in the parent object.
// Necessary for situations in which the read object has an XmlValue,
// but also has XmlAttributes.
if (attributed != null) {
for (int i = 0; i < in.getAttributeCount(); i++) {
QName attributeName = in.getAttributeName(i);
XmlMapping mapping = attributed.getAttributeMapping(attributeName);
if (mapping == null)
throw new UnmarshalException(L.l("Attribute {0} not found in {1}",
attributeName,
attributed.getType()));
mapping.readAttribute(in, i, parent);
}
}
// Now read the actual value of the CData
in.next();
Object ret = null;
if (in.getEventType() == in.CHARACTERS) {
ret = read(in.getText());
// essentially a nextTag() that handles end of document gracefully
while (in.hasNext()) {
in.next();
if (in.getEventType() == in.END_ELEMENT)
break;
}
}
else {
String nil = in.getAttributeValue(W3C_XML_SCHEMA_INSTANCE_NS_URI, "nil");
if ("true".equals(nil)) // XXX nillable?
ret = getNilValue();
else
ret = read(""); // Hack when we have something like <tag></tag>
}
while (in.hasNext()) {
in.next();
if (in.getEventType() == in.START_ELEMENT ||
in.getEventType() == in.END_ELEMENT)
break;
}
return ret;
}
public Object bindFrom(BinderImpl binder, NodeIterator node, Object previous)
throws IOException, JAXBException
{
Node root = node.getNode();
Object ret = read(root.getTextContent());
binder.bind(ret, root);
return ret;
}
public abstract String write(Object in)
throws IOException, JAXBException;
public void write(Marshaller m, XMLStreamWriter out, Object value,
Namer namer, Object obj,
ArrayList<XmlMapping> attributes)
throws IOException, XMLStreamException, JAXBException
{
// This checks if obj != null (as opposed to value != null) because we
// may actually want to write something if the value is null. For example,
// we may write an xsi:nil="true".
if (obj != null) {
QName qname = namer.getQName(value);
if (attributes != null || value != null)
StaxUtil.writeStartElement(out, qname);
if (attributes != null) {
for (int i = 0; i < attributes.size(); i++) {
attributes.get(i).write(m, out, obj);
}
}
if (attributes != null || value != null) {
out.writeCharacters(write(value));
StaxUtil.writeEndElement(out, qname);
}
}
}
public void write(Marshaller m, XMLStreamWriter out,
Object value, Namer namer)
throws IOException, XMLStreamException, JAXBException
{
write(m, out, value, namer, null);
}
public void write(Marshaller m, XMLStreamWriter out, Object value,
Namer namer, Object obj)
throws IOException, XMLStreamException, JAXBException
{
if (value != null) {
QName qname = namer.getQName(value);
StaxUtil.writeStartElement(out, qname);
out.writeCharacters(write(value));
StaxUtil.writeEndElement(out, qname);
}
}
public Node bindTo(BinderImpl binder, Node node,
Object value, Namer namer)
throws IOException, JAXBException
{
QName qname = namer.getQName(value);
QName name = JAXBUtil.qnameFromNode(node);
if (! name.equals(qname)) {
Document doc = node.getOwnerDocument();
node = JAXBUtil.elementFromQName(qname, doc);
}
node.setTextContent(write(value));
binder.bind(value, node);
return node;
}
public String toString()
{
return this.getClass().getSimpleName();
}
}