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// Metawidget
//
// This file is dual licensed under both the LGPL
// (http://www.gnu.org/licenses/lgpl-2.1.html) and the EPL
// (http://www.eclipse.org/org/documents/epl-v10.php). As a
// recipient of Metawidget, you may choose to receive it under either
// the LGPL or the EPL.
//
// Commercial licenses are also available. See http://metawidget.org
// for details.
package org.metawidget.statically;
import java.io.Writer;
import java.util.Map;
import org.metawidget.iface.MetawidgetException;
import org.metawidget.statically.StaticUtils.IndentedWriter;
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;
private String mTextContent;
//
// 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() {
return mTextContent;
}
public void setTextContent( String textContent ) {
mTextContent = textContent;
}
@Override
public void write( Writer writer, int initialIndent ) {
super.write( writer, initialIndent );
// FreemarkerLayout will setTextContent directly
if ( mTextContent != null ) {
Writer writerToUse = writer;
if ( initialIndent >= 0 ) {
writerToUse = new IndentedWriter( writer, initialIndent );
}
try {
writerToUse.write( mTextContent );
} catch ( Exception e ) {
throw MetawidgetException.newException( e );
}
}
}
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 );
}
}
}