org.metawidget.android.AndroidConfigReader 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.android;
import java.io.InputStream;
import org.metawidget.config.iface.ResourceResolver;
import org.metawidget.config.impl.BaseConfigReader;
import org.metawidget.iface.MetawidgetException;
import android.content.Context;
import android.content.res.Resources;
/**
* Specialized ConfigReader for Android.
*
* Resolves references by using Context.getResources first. Resource strings should be
* of the form @com.foo:raw/metawidget_metadata.
*
* @author Richard Kennard
*/
public class AndroidConfigReader
extends BaseConfigReader {
//
// Private members
//
private Context mContext;
//
// Constructor
//
public AndroidConfigReader( final Context context ) {
super( new ResourceResolver() {
/**
* Overridden to try Context.getResources first.
*
* Resource strings should be of the form @com.foo:raw/metawidget_metadata.
*/
public InputStream openResource( String resource ) {
if ( !resource.startsWith( "@" ) ) {
throw MetawidgetException.newException( "Resource name does not start with '@': " + resource );
}
Resources resources = context.getResources();
int id = resources.getIdentifier( resource, null, null );
if ( id == 0 ) {
throw MetawidgetException.newException( "Resource.getIdentifier returns 0 for " + resource );
}
return resources.openRawResource( id );
}
} );
mContext = context;
}
//
// Protected methods
//
/**
* Overridden to process ints using Resources.getIdentifier
*
* Resource strings should be of the form @style/section.
*/
@Override
protected Object createNative( String name, Class namespace, String recordedText )
throws Exception {
if ( "int".equals( name ) && recordedText.startsWith( "@" ) ) {
Resources resources = mContext.getResources();
int id = resources.getIdentifier( recordedText, null, null );
if ( id == 0 ) {
throw MetawidgetException.newException( "Resource.getIdentifier returns 0 for " + recordedText );
}
return id;
}
return super.createNative( name, namespace, recordedText );
}
}