org.jboss.mx.metadata.XMLMetaData Maven / Gradle / Ivy
/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.mx.metadata;
// $Id: XMLMetaData.java 81026 2008-11-14 12:51:05Z [email protected] $
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Map;
import javax.management.MBeanInfo;
import javax.management.NotCompliantMBeanException;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentType;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
import org.jboss.mx.modelmbean.XMBeanConstants;
import org.jboss.mx.service.ServiceConstants;
import org.jboss.mx.util.JBossNotCompliantMBeanException;
import org.jboss.util.xml.JBossEntityResolver;
import org.xml.sax.SAXException;
/**
* Aggregate builder for XML schemas. This builder implementation is used
* as an aggregate for all XML based builder implementations. The correct
* XML parser is picked based on the schema declaration of the XML file.
*
* @author Juha Lindfors.
* @author Dimitris Andreadis.
* @author Matt Munz
*/
public class XMLMetaData
extends AbstractBuilder
implements ServiceConstants, XMBeanConstants
{
// Attributes ----------------------------------------------------
private static final int NO_VERSION = -1;
private static final int JBOSS_XMBEAN_1_0 = 0;
private static final int JBOSS_XMBEAN_1_1 = 1;
private static final int JBOSS_XMBEAN_1_2 = 2;
/**
* The URL for the XML file.
*/
private URL url = null;
private Element element;
private String versionString;
/**
* The class name of the resource class this Model MBean represents.
*/
private String resourceClassName = null;
/**
* The class name of the Model MBean implementation class.
*/
private String mmbClassName = null;
// Constructors --------------------------------------------------
/**
* Constructs an aggregate XML builder implementation.
*
* @param mmbClassName the class name of the Model MBean
* implementation
* @param resourceClassName the class name of the resource object the
* Model MBean represents
* @param url the URL for the XML definition of the
* management interface
*/
public XMLMetaData(String mmbClassName, String resourceClassName, URL url)
{
super();
this.url = url;
this.mmbClassName = mmbClassName;
this.resourceClassName = resourceClassName;
}
/**
* Constructs an aggregate XML builder implementation.
*
* @param mmbClassName the class name of the Model MBean
* implementation
* @param resourceClassName the class name of the resource object the
* Model MBean represents
* @param url the URL for the XML definition of the
* management interface
*
* @throws MalformedURLException if the URL string could not be resolved
*/
public XMLMetaData(String mmbClassName, String resourceClassName, String url)
throws MalformedURLException
{
this(mmbClassName, resourceClassName, new URL(url));
}
/**
* Constructs an aggregate XML builder implementation.
*
* @param mmbClassName the class name of the Model MBean
* implementation
* @param resourceClassName the class name of the resource object the
* Model MBean represents
* @param url the URL for the XML definition of the
* management interface
* @param properties Map of configuration properties for this
* builder. These properties will be passed
* to the appropriate XML schema specific builder
* when it is created.
*/
public XMLMetaData(String mmbClassName, String resourceClassName, URL url, Map properties)
{
this(mmbClassName, resourceClassName, url);
setProperties(properties);
}
/**
* Constructs an aggregate XML builder implementation.
*
* @param mmbClassName the class name of the Model MBean
* implementation
* @param resourceClassName the class name of the resource object the
* Model MBean represents
* @param url the URL for the XML definition of the
* management interface
* @param properties Map of configuration properties for this
* builder. These properties will be passed
* to the appropriate XML schema specific builder
* when it is created.
*
* @throws MalformedURLException if the URL string could not be resolved
*/
public XMLMetaData(String mmbClassName, String resourceClassName,
String url, Map properties) throws MalformedURLException
{
this(mmbClassName, resourceClassName, new URL(url), properties);
}
/**
* Creates a new XMLMetaData instance using an explicit DOM element
* as the configuration source, and requiring an explicit version indicator.
* The version should be the PublicID for the dtd or (worse) the dtd url.
*
* @param mmbClassName a String value
* @param resourceClassName a String value
* @param element an org.w3c.dom.Element value
* @param version a String value
*/
public XMLMetaData(String mmbClassName, String resourceClassName, Element element, String version)
{
super();
this.mmbClassName = mmbClassName;
this.resourceClassName = resourceClassName;
this.element = element;
versionString = version;
}
// MetaDataBuilder implementation --------------------------------
/**
* Constructs the Model MBean metadata. This implementation reads the
* document type definition from the beginning of the XML file and picks
* a corresponding XML builder based on the schema name. In case no
* document type is defined the latest schema builder for this JBossMX
* release is used.
*
* The SAX parser implementation is selected by default based on JAXP
* configuration. If you want to use JAXP to select the parser, you can
* set the system property "javax.xml.parsers.SAXParserFactory".
* For example, to use Xerces you might define:
*
* java -Djavax.xml.parsers.SAXParserFactory=org.apache.xerces.jaxp.SAXParserFactoryImpl ...
*
*
*
* In case you can't or don't want to use JAXP to configure the SAX parser
* implementation you can override the SAX parser implementation by setting
* an MBean descriptor field {@link XMBeanConstants#SAX_PARSER} to the
* parser class string value.
*
* @return initialized MBean info
* @throws NotCompliantMBeanException if there were errors building the
* MBean info from the given XML file.
*/
public MBeanInfo build() throws NotCompliantMBeanException
{
try
{
int version = NO_VERSION;
if (versionString == null)
{
// by default, let JAXP pick the SAX parser
SAXReader reader = new SAXReader();
// check if user wants to override the SAX parser property
if (properties.get(SAX_PARSER) != null)
{
try
{
reader.setXMLReaderClassName(getStringProperty(SAX_PARSER));
}
catch (SAXException e)
{
//Should log and ignore, I guess
} // end of try-catch
}
// by default we validate
reader.setValidation(true);
// the user can override the validation by setting the VALIDATE property
try
{
boolean validate = getBooleanProperty(XML_VALIDATION);
reader.setValidation(validate);
}
catch (IllegalPropertyException e)
{
// FIXME: log the exception (warning)
// fall through, use the default value
}
//supply it with our dtd locally.
reader.setEntityResolver(new JBossEntityResolver());
// get the element and start parsing...
Document doc = reader.read(url);
element = doc.getRootElement();
DocumentType type = doc.getDocType();
version = validateVersionString(type.getPublicID());
if (version == NO_VERSION)
{
version = validateVersionString(type.getSystemID());
} // end of if ()
}
else
{
version = validateVersionString(versionString);
} // end of else
if (element == null)
{
throw new IllegalStateException("No element supplied with explict version!");
}
// These are the known schemas for us. Pick the correct one based on
// schema or default to the latest.docURL.endsWith(JBOSSMX_XMBEAN_DTD_1_0)
if (version == JBOSS_XMBEAN_1_0 ||
version == JBOSS_XMBEAN_1_1 ||
version == JBOSS_XMBEAN_1_2)
{
// jboss_xmbean_1_0.dtd is the only implemented useful xmbean
return new JBossXMBean10(mmbClassName, resourceClassName, element, properties).build();
}
else
{
throw new NotCompliantMBeanException("Unknown xmbean type " + versionString);
} // end of else
}
catch (DocumentException e)
{
throw new JBossNotCompliantMBeanException("Error parsing the XML file, from XMLMetaData: ", e);
}
}
private int validateVersionString(String versionString)
{
if (PUBLIC_JBOSSMX_XMBEAN_DTD_1_0.equals(versionString))
{
return JBOSS_XMBEAN_1_0;
} // end of if ()
if (versionString != null && versionString.endsWith(JBOSSMX_XMBEAN_DTD_1_0))
{
return JBOSS_XMBEAN_1_0;
} // end of if ()
if (PUBLIC_JBOSSMX_XMBEAN_DTD_1_1.equals(versionString))
{
return JBOSS_XMBEAN_1_1;
} // end of if ()
if (versionString != null && versionString.endsWith(JBOSSMX_XMBEAN_DTD_1_1))
{
return JBOSS_XMBEAN_1_1;
} // end of if ()
if (PUBLIC_JBOSSMX_XMBEAN_DTD_1_2.equals(versionString))
{
return JBOSS_XMBEAN_1_2;
} // end of if ()
if (versionString != null && versionString.endsWith(JBOSSMX_XMBEAN_DTD_1_2))
{
return JBOSS_XMBEAN_1_2;
} // end of if ()
//There is nothing defined for jboss xmbean 1.2, so we can't recognize it.
return NO_VERSION;
}
}
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