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The core XML data binding framework with support for marshalling Java objects to
and unmarshalling from XML documents.
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* Intalio, Inc.
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* 5. Due credit should be given to the Exolab Project (http://www.exolab.org/).
*
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* Copyright 2002-2004 (C) Intalio, Inc. All Rights Reserved.
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* $Id$
*/
package org.exolab.castor.xml.descriptors;
import org.exolab.castor.mapping.AccessMode;
import org.exolab.castor.mapping.ClassDescriptor;
import org.exolab.castor.mapping.FieldDescriptor;
import org.exolab.castor.mapping.FieldHandler;
import org.exolab.castor.xml.NodeType;
import org.exolab.castor.xml.TypeValidator;
import org.exolab.castor.xml.XMLFieldDescriptor;
import org.exolab.castor.xml.XMLFieldHandler;
import org.exolab.castor.xml.util.XMLFieldDescriptorImpl;
/**
* The default class descriptor for Arrays that are passed in as the root-level class.
*
* @author Keith Visco
* @version $Revision$ $Date: 2004-12-16 22:49:25 -0700 (Thu, 16 Dec 2004) $
*/
public class RootArrayDescriptor extends BaseDescriptor {
/** Our field descriptor for our "content". */
private static final XMLFieldDescriptor NO_CONTENT = null;
/** The set of attribute descriptors. */
private static final XMLFieldDescriptor[] NO_ATTRIBUTES = new XMLFieldDescriptor[0];
// --------------------/
// - Member Variables -/
// --------------------/
/** Our field descriptor array. Lists the fields we describe. */
private final FieldDescriptor[] _fields = new FieldDescriptor[1];
/** The set of element descriptors. */
private final XMLFieldDescriptor[] _elements = new XMLFieldDescriptor[1];
/** Class object for the type contained in the array. */
private final Class _javaClass;
/** The XML name for the described object.. */
private String _xmlName = "array";
/** The desired namespace for the described object. */
private String _nsURI = null;
/** Type validator to use to validate an instance of this type. */
private TypeValidator _validator = null;
// ----------------/
// - Constructors -/
// ----------------/
/**
* Creates a new RootArrayDescriptor for an array of the provided type.
*
* @param array An array to create a RootArrayDescriptor for.
*/
public RootArrayDescriptor(final Class array) {
super();
if (array == null) {
String err = "Argument array must not be null.";
throw new IllegalArgumentException(err);
}
if (!array.isArray()) {
String err = "Argument array must be an array.";
throw new IllegalArgumentException(err);
}
_javaClass = array.getComponentType();
// -- create element descriptor
XMLFieldDescriptorImpl desc =
new XMLFieldDescriptorImpl(_javaClass, "_elements", null, NodeType.Element);
FieldHandler handler = (new XMLFieldHandler() {
/**
* {@inheritDoc}
*/
public Object getValue(final Object object) throws IllegalStateException {
return object;
}
/**
* {@inheritDoc}
*/
public void setValue(final Object object, final Object value)
throws IllegalStateException, IllegalArgumentException {
// -- do nothing
}
/**
* {@inheritDoc}
*/
public Object newInstance(final Object parent) {
// -- not used
return null;
}
});
desc.setHandler(handler);
desc.setMultivalued(true);
_elements[0] = desc;
_fields[0] = desc;
} // -- RootArrayDescriptor()
// -----------/
// - Methods -/
// -----------/
/**
* Returns the set of attribute XMLFieldDescriptors.
*
* @return an array of XMLFieldDescriptors for all members that should be marshaled as attributes
*/
public XMLFieldDescriptor[] getAttributeDescriptors() {
return NO_ATTRIBUTES;
} // -- getAttributeDescriptors()
/**
* Returns the Class that this ClassDescriptor describes.
*
* @return the Class that this ClassDescriptor describes.
*/
public Class getJavaClass() {
return _javaClass;
} // -- getClassType()
/**
* Returns the set of element MarshalDescriptors.
*
* @return an array of MarshalDescriptors for all members that should be marshaled as Elements
*/
public XMLFieldDescriptor[] getElementDescriptors() {
return _elements;
} // -- getElementDescriptors()
/**
* Returns the class descriptor of the class extended by this class.
*
* @return The extended class descriptor
*/
public ClassDescriptor getExtends() {
return null;
} // -- getExtends
/**
* Returns a list of fields represented by this descriptor.
*
* @return A list of fields
*/
public FieldDescriptor[] getFields() {
return _fields;
} // -- getFields
/**
* Returns the descriptor for dealing with Text content.
*
* @return the XMLFieldDescriptor for dealing with Text content
*/
public XMLFieldDescriptor getContentDescriptor() {
return NO_CONTENT;
} // -- getContentDescriptor()
/**
* Returns the XML field descriptor matching the given xml name and nodeType. If NodeType is null,
* then either an AttributeDescriptor, or ElementDescriptor may be returned. Null is returned if
* no matching descriptor is available.
*
* @param name the xml name to match against
* @param namespace the namespace uri
* @param nodeType the NodeType to match against, or null if the node type is not known.
* @return the matching descriptor, or null if no matching descriptor is available.
*/
public XMLFieldDescriptor getFieldDescriptor(final String name, final String namespace,
final NodeType nodeType) {
return _elements[0];
} // -- getFieldDescriptor
/**
* Returns the namespace prefix to use when marshalling as XML.
*
* @return the namespace prefix to use when marshalling as XML.
*/
public String getNameSpacePrefix() {
return null;
} // -- getNameSpacePrefix
/**
* Returns the namespace URI used when marshaling and unmarshaling as XML.
*
* @return the namespace URI used when marshaling and unmarshaling as XML.
*/
public String getNameSpaceURI() {
return _nsURI;
} // -- getNameSpaceURI
/**
* Returns the identity field, or null if this class has no identity.
*
* @return The identity field
*/
public FieldDescriptor getIdentity() {
return null;
} // -- getIdentity
/**
* Returns the access mode specified for this class.
*
* @return The access mode
*/
public AccessMode getAccessMode() {
return null;
} // -- getAccessMode
/**
* Returns a specific validator for the class described by this ClassDescriptor. A null value may
* be returned if no specific validator exists.
*
* @return the type validator for the class described by this ClassDescriptor.
*/
public TypeValidator getValidator() {
return _validator;
} // -- getValidator
/**
* Returns the XML Name for the Class being described.
*
* @return the XML name.
*/
public String getXMLName() {
return _xmlName;
} // -- getXMLName
/**
* Sets the XML Name for the described object.
*
* @param xmlName the XML name to use for the described object.
*/
public void setXMLName(final String xmlName) {
this._xmlName = xmlName;
} // -- setXMLName
/**
* Sets the desired namespace URI for the described object.
*
* @param nsURI is the desired namespace URI
*/
public void setNameSpaceURI(final String nsURI) {
this._nsURI = nsURI;
} // -- setNameSpaceURI
} // -- RootArrayDescriptor