org.metawidget.statically.BaseStaticWidget Maven / Gradle / Ivy
// 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.IOException;
import java.io.StringWriter;
import java.io.Writer;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import org.metawidget.iface.MetawidgetException;
import org.metawidget.util.CollectionUtils;
/**
* @author Richard Kennard
*/
public abstract class BaseStaticWidget
implements StaticWidget {
//
// Private methods
//
private StaticWidget mParent;
private List mChildren = new ArrayList() {
@Override
public void add( int index, StaticWidget element ) {
if ( element instanceof BaseStaticWidget ) {
( (BaseStaticWidget) element ).setParent( BaseStaticWidget.this );
}
super.add( index, element );
}
@Override
public StaticWidget set( int index, StaticWidget element ) {
if ( element instanceof BaseStaticWidget ) {
( (BaseStaticWidget) element ).setParent( BaseStaticWidget.this );
}
StaticWidget previousElement = super.set( index, element );
if ( previousElement instanceof BaseStaticWidget ) {
( (BaseStaticWidget) previousElement ).setParent( null );
}
return previousElement;
}
@Override
public boolean add( StaticWidget element ) {
if ( element instanceof BaseStaticWidget ) {
( (BaseStaticWidget) element ).setParent( BaseStaticWidget.this );
}
return super.add( element );
}
@Override
public boolean addAll( Collection c ) {
for( StaticWidget element : c ) {
if ( element instanceof BaseStaticWidget ) {
( (BaseStaticWidget) element ).setParent( BaseStaticWidget.this );
}
}
return super.addAll( c );
}
@Override
public boolean addAll( int index, Collection c ) {
for( StaticWidget element : c ) {
if ( element instanceof BaseStaticWidget ) {
( (BaseStaticWidget) element ).setParent( BaseStaticWidget.this );
}
}
return super.addAll( index, c );
}
};
private Map mClientProperties;
//
// Methods
//
public List getChildren() {
return mChildren;
}
public StaticWidget getParent() {
return mParent;
}
public void write( Writer writer )
throws IOException {
for ( StaticWidget child : mChildren ) {
child.write( writer );
}
}
/**
* General storage area, like JComponent.putClientProperty.
*/
public void putClientProperty( Object key, Object value ) {
if ( mClientProperties == null ) {
mClientProperties = CollectionUtils.newHashMap();
}
mClientProperties.put( key, value );
}
/**
* General storage area, like JComponent.putClientProperty.
*/
@SuppressWarnings( "unchecked" )
public T getClientProperty( Object key ) {
if ( mClientProperties == null ) {
return null;
}
return (T) mClientProperties.get( key );
}
@Override
public String toString() {
try {
StringWriter writer = new StringWriter();
write( writer );
return writer.toString();
} catch ( IOException e ) {
throw MetawidgetException.newException( e );
}
}
//
// Private methods
//
/*package private*/ void setParent( StaticWidget widget ) {
mParent = widget;
}
}