org.metawidget.statically.StaticXmlMetawidget Maven / Gradle / Ivy
// Metawidget
//
// This library 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 library 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 library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
package org.metawidget.statically;
import java.util.Map;
import org.metawidget.util.CollectionUtils;
/**
* Base Metawidget for static code generation in XML environments.
*
* @author Richard Kennard
*/
public abstract class StaticXmlMetawidget
extends StaticMetawidget
implements StaticXmlWidget {
//
// Private members
//
private Map mAttributes;
//
// Public methods
//
public void putAttribute( String name, String value ) {
if ( mAttributes == null ) {
// (use TreeMap for consistent unit tests)
mAttributes = CollectionUtils.newTreeMap();
}
mAttributes.put( name, value );
}
public String getAttribute( String name ) {
if ( mAttributes == null ) {
return null;
}
return mAttributes.get( name );
}
public String getPrefix() {
return "m";
}
public Map getAdditionalNamespaceURIs() {
// Metawidgets should never have additional namespaces
return null;
}
public String getTextContent() {
// Metawidgets should never have text content
throw new UnsupportedOperationException();
}
public void setTextContent( String textContent ) {
// Metawidgets should never have text content
throw new UnsupportedOperationException();
}
public String getNamespaceURI() {
// Metawidgets should never be output (kind of the point of being static)
return null;
}
/**
* Recurse over all children and retrieve the namespaces they use.
*
* @return map of prefix and namespace
*/
public Map getNamespaces() {
Map namespaces = CollectionUtils.newHashMap();
populateNamespaces( this, namespaces );
return namespaces;
}
//
// Private methods
//
private void populateNamespaces( StaticXmlWidget xmlWidget, Map namespaces ) {
for ( StaticWidget child : xmlWidget.getChildren() ) {
StaticXmlWidget xmlChild = (StaticXmlWidget) child;
String prefix = xmlChild.getPrefix();
String namespaceURI = xmlChild.getNamespaceURI();
if ( prefix != null && namespaceURI != null ) {
namespaces.put( prefix, namespaceURI );
}
if ( xmlChild.getAdditionalNamespaceURIs() != null ) {
namespaces.putAll( xmlChild.getAdditionalNamespaceURIs() );
}
populateNamespaces( xmlChild, namespaces );
}
}
}