de.intarsys.pdf.font.outlet.FontFactory Maven / Gradle / Ivy

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/*
 * Copyright (c) 2007, intarsys consulting GmbH
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 *
 * - Neither the name of intarsys nor the names of its contributors may be used
 *   to endorse or promote products derived from this software without specific
 *   prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
package de.intarsys.pdf.font.outlet;

import java.util.Iterator;

import de.intarsys.tools.provider.ProviderTools;

/**
 * A singleton to access the current {@link IFontFactory}.
 * 
 */
public class FontFactory {
	static private boolean lookupProviders = true;
	/**
	 * The default factory.
	 */
	private static IFontFactory Unique;

	static protected IFontFactory findProviders() {
		Iterator ps = ProviderTools.providers(IFontFactory.class);
		while (ps.hasNext()) {
			try {
				return ps.next();
			} catch (Throwable e) {
				// ignore and try on
			}
		}
		return null;
	}

	/**
	 * The {@link IFontFactory} singleton.
	 * 
	 * @return The {@link IFontFactory} singleton.
	 */
	static public IFontFactory get() {
		if (Unique == null) {
			init();
		}
		return Unique;
	}

	static protected void init() {
		if (lookupProviders) {
			Unique = findProviders();
		}
		if (Unique == null) {
			Unique = new NullFontFactory();
		}
	}

	public static boolean isLookupProviders() {
		return lookupProviders;
	}

	/**
	 * Set the {@link IFontFactory} singleton.
	 * 
	 * @param factory
	 *            The {@link IFontFactory} singleton.
	 */
	static public void set(IFontFactory factory) {
		Unique = factory;
	}

	public static void setLookupProviders(boolean doLookupProviders) {
		lookupProviders = doLookupProviders;
	}
}