bundles/org.eclipse.osgi/eclipseAdaptor/src/org/eclipse/core/runtime/adaptor/EclipseAdaptorMsg.java

/*******************************************************************************
 * Copyright (c) 2003, 2004 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.core.runtime.adaptor;

import org.eclipse.osgi.framework.msg.MessageFormat;
import org.eclipse.osgi.service.resolver.*;

/**
 * This class retrieves strings from a resource bundle and returns them,
 * formatting them with MessageFormat when required.
 * <p>
 * It is used by the system classes to provide national language support, by
 * looking up messages in the <code>
 *    org.eclipse.osgi.framework.internal.core.ExternalMessages
 * </code>
 * resource bundle. Note that if this file is not available, or an invalid key
 * is looked up, or resource bundle support is not available, the key itself
 * will be returned as the associated message. This means that the <em>KEY</em>
 * should a reasonable human-readable (english) string.
 */
public class EclipseAdaptorMsg {
	public static final String NEW_LINE = System.getProperty("line.separator", "\n");
	public static MessageFormat formatter;
	// Attempt to load the message bundle.
	static {
		formatter = new MessageFormat("org.eclipse.core.runtime.adaptor.EclipseAdaptorMessages");	//TODO This could be an adaptor constant.
	}
	public static String getResolutionFailureMessage(VersionConstraint unsatisfied) {
		if (unsatisfied.isResolved())
			throw new IllegalArgumentException();
		if (unsatisfied instanceof PackageSpecification)
			return EclipseAdaptorMsg.formatter.getString("ECLIPSE_MISSING_IMPORTED_PACKAGE", toString(unsatisfied));	//$NON-NLS-1$
		else if (unsatisfied instanceof BundleSpecification)
			if (((BundleSpecification) unsatisfied).isOptional())
				return EclipseAdaptorMsg.formatter.getString("ECLIPSE_MISSING_OPTIONAL_REQUIRED_BUNDLE", toString(unsatisfied));	//$NON-NLS-1$
			else
				return EclipseAdaptorMsg.formatter.getString("ECLIPSE_MISSING_REQUIRED_BUNDLE", toString(unsatisfied));//$NON-NLS-1$
		else
			return EclipseAdaptorMsg.formatter.getString("ECLIPSE_MISSING_HOST", toString(unsatisfied)); //$NON-NLS-1$
	}
	private static String toString(VersionConstraint constraint) {
		org.eclipse.osgi.service.resolver.Version versionSpec = constraint.getVersionSpecification();
		if (versionSpec == null)
			return constraint.getName();
		return constraint.getName() + '_' + versionSpec;
	}
}