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/**
* Copyright (c) 2009-2012, Netbout.com
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met: 1) Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer. 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) Neither the name of the NetBout.com nor
* the names of its contributors may be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS 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
* THE COPYRIGHT HOLDER OR 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.
*/
package com.netbout.spi.xml;
import com.jcabi.log.Logger;
import com.jcabi.urn.URN;
import java.net.URL;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.Marshaller;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlType;
import javax.xml.namespace.QName;
import org.w3c.dom.Document;
/**
* Converts a JAXB-annotated object to XML.
*
* @author Yegor Bugayenko ([email protected])
* @version $Id$
*/
public final class JaxbPrinter {
/**
* The object.
*/
private final transient Object object;
/**
* Public ctor.
* @param obj The object to convert
*/
public JaxbPrinter(final Object obj) {
this.object = obj;
}
/**
* Print the XML document.
* @return The document
*/
public String print() {
return this.print("");
}
/**
* Print the XML document, adding a suffix to its namespace.
* @param suffix Optional suffix for a namespace
* @return The document
*/
public String print(final String suffix) {
final URN namespace = JaxbPrinter.namespace(this.object.getClass());
if (namespace.isEmpty() && !suffix.isEmpty()) {
throw new IllegalArgumentException(
Logger.format(
"Can't add '%s' suffix to empty namespace document",
suffix
)
);
}
return this.print(
URN.create(String.format("%s%s", namespace, suffix))
);
}
/**
* Print the XML document, changing the namespace.
* @param required New namespace to set there
* @return The document
*/
public String print(final URN required) {
final Document dom = this.marshall();
final URN namespace = JaxbPrinter.namespace(this.object.getClass());
if (!namespace.isEmpty()) {
if (!namespace.equals(required)) {
DomParser.rename(
dom,
dom.getDocumentElement(),
namespace.toString(),
required
);
}
final SchemaLocation schema = this.object
.getClass()
.getAnnotation(SchemaLocation.class);
if (schema == null) {
throw new IllegalStateException(
Logger.format(
"@SchemaLocation annotation is absent at %[type]s",
this.object
)
);
}
URL location;
try {
location = new URL(schema.value());
} catch (java.net.MalformedURLException ex) {
throw new IllegalStateException(
Logger.format(
"Invalid URL '%s' for schemaLocation in %[type]s",
schema.value(),
this.object
)
);
}
dom.getDocumentElement().setAttributeNS(
"http://www.w3.org/2001/XMLSchema-instance",
"xsi:schemaLocation",
String.format("%s %s", required, location)
);
}
return new DomPrinter(dom).print();
}
/**
* Convert object to DOM document.
* @return The document
*/
@SuppressWarnings({ "unchecked", "rawtypes" })
private Document marshall() {
JAXBContext ctx;
try {
ctx = JAXBContext.newInstance(this.object.getClass());
} catch (javax.xml.bind.JAXBException ex) {
throw new IllegalArgumentException(ex);
}
Marshaller mrsh;
try {
mrsh = ctx.createMarshaller();
} catch (javax.xml.bind.JAXBException ex) {
throw new IllegalStateException(ex);
}
Document dom;
try {
dom = DomParser.factory().newDocumentBuilder().newDocument();
} catch (javax.xml.parsers.ParserConfigurationException ex) {
throw new IllegalStateException(ex);
}
try {
mrsh.marshal(
new JAXBElement(
this.qname(),
this.object.getClass(),
this.object
),
dom
);
} catch (javax.xml.bind.JAXBException ex) {
throw new IllegalArgumentException(ex);
}
return dom;
}
/**
* Get namespace of this object (it has to be static because it works
* with Class, not an Object and is used from other classes in this
* package).
* @param type The type
* @return The namespace of it
*/
public static URN namespace(final Class type) {
URN namespace;
final XmlType tannot = XmlType.class.cast(
type.getAnnotation(XmlType.class)
);
if (tannot == null) {
final XmlRootElement rannot = XmlRootElement.class.cast(
type.getAnnotation(XmlRootElement.class)
);
if (rannot == null) {
throw new IllegalArgumentException(
String.format(
// @checkstyle LineLength (1 line)
"Object of type '%s' doen't have @XmlType or @XmlRootElement annotation, can't find namespace",
type.getName()
)
);
} else {
namespace = JaxbPrinter.convert(rannot.namespace());
}
} else {
namespace = JaxbPrinter.convert(tannot.namespace());
}
return namespace;
}
/**
* Convert JAXB-specific namespace to URN.
* @param origin The namespace to convert, in JAXB-form
* @return The namespace of it
*/
private static URN convert(final String origin) {
URN namespace;
if ("##default".equals(origin)) {
namespace = new URN();
} else {
try {
namespace = new URN(origin);
} catch (java.net.URISyntaxException ex) {
throw new IllegalArgumentException(
Logger.format(
"Invalid format of namespace '%s'",
origin
),
ex
);
}
}
return namespace;
}
/**
* Get QName from the object.
* @return The QName
*/
private QName qname() {
String name;
final XmlType tannot = XmlType.class.cast(
this.object.getClass().getAnnotation(XmlType.class)
);
if (tannot == null) {
final XmlRootElement rannot = XmlRootElement.class.cast(
this.object.getClass().getAnnotation(XmlRootElement.class)
);
if (rannot == null) {
throw new IllegalArgumentException(
String.format(
// @checkstyle LineLength (1 line)
"Object of type '%[type]s' doen't have @XmlType or @XmlRootElement annotation, can't get its name",
this.object
)
);
} else {
name = rannot.name();
}
} else {
name = tannot.name();
}
QName qname;
final URN namespace = JaxbPrinter.namespace(this.object.getClass());
if (namespace.isEmpty()) {
qname = new QName("", name);
} else {
qname = new QName(namespace.toString(), name);
}
return qname;
}
}
