DisplayAdapter.java from BIRT at Krugle

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/***********************************************************************
 * Copyright (c) 2004 Actuate Corporation.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 * Actuate Corporation - initial API and implementation
 ***********************************************************************/

package org.eclipse.birt.chart.device;

import java.net.URL;
import java.util.Locale;

import org.eclipse.birt.chart.exception.ChartException;
import org.eclipse.birt.chart.model.attribute.ColorDefinition;
import org.eclipse.birt.chart.model.attribute.FontDefinition;
import org.eclipse.birt.chart.model.attribute.Size;
import org.eclipse.birt.chart.model.component.Label;

import com.ibm.icu.util.ULocale;

/**
 * A no-op adapter implementation for the
 * {@link org.eclipse.birt.chart.device.IDisplayServer}interface definition.
 */
public abstract class DisplayAdapter implements IDisplayServer
{

	/**
	 * An internal instance of the locale being used for processing
	 */
	private transient ULocale lcl = null;

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.chart.device.IDisplayServer#debug()
	 */
	public void debug( )
	{
		// DO NOTHING
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.chart.device.IDisplayServer#logCreation(java.lang.Object)
	 */
	public void logCreation( Object oMisc )
	{
		// DO NOTHING
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.chart.device.IDisplayServer#createFont(org.eclipse.birt.chart.model.attribute.FontDefinition)
	 */
	public Object createFont( FontDefinition fd )
	{
		// NO-OP ADAPTER DEFAULT IMPLEMENTATION
		return null;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.chart.device.IDisplayServer#getColor(org.eclipse.birt.chart.model.attribute.ColorDefinition)
	 */
	public Object getColor( ColorDefinition cd )
	{
		// NO-OP ADAPTER DEFAULT IMPLEMENTATION
		return null;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.chart.device.IDisplayServer#getDpiResolution()
	 */
	public int getDpiResolution( )
	{
		// NO-OP ADAPTER DEFAULT IMPLEMENTATION
		return 96;
	}

	public void setDpiResolution( int dpi )
	{
		// NO-OP ADAPTER DEFAULT IMPLEMENTATION
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.chart.device.IDisplayServer#loadImage(java.net.URL)
	 */
	public Object loadImage( URL url ) throws ChartException
	{
		// NO-OP ADAPTER DEFAULT IMPLEMENTATION
		return null;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.chart.device.IDisplayServer#getSize(java.lang.Object)
	 */
	public Size getSize( Object oImage )
	{
		// NO-OP ADAPTER DEFAULT IMPLEMENTATION
		return null;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.chart.device.IDisplayServer#getObserver()
	 */
	public Object getObserver( )
	{
		// NO-OP ADAPTER DEFAULT IMPLEMENTATION
		return null;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.chart.device.IDisplayServer#getTextMetrics(org.eclipse.birt.chart.model.component.Label)
	 */
	public ITextMetrics getTextMetrics( Label la )
	{
		// NO-OP ADAPTER DEFAULT IMPLEMENTATION
		return null;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.chart.device.IDisplayServer#getLocale()
	 */
	public final Locale getLocale( )
	{
		return getULocale( ).toLocale( );
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.chart.device.IDisplayServer#getULocale()
	 */
	public final ULocale getULocale( )
	{
		return ( lcl == null ) ? ULocale.getDefault( ) : lcl;
	}

	/**
	 * A convenience method provided to associate a locale with a display server
	 * 
	 * @param lcl
	 *            The locale to be set
	 */
	public final void setLocale( ULocale lcl )
	{
		this.lcl = lcl;
	}
}
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