SelectionHelper.java

/*******************************************************************************
 * Copyright (c) 2006-2013, Cloudsmith Inc.
 * The code, documentation and other materials contained herein have been
 * licensed under the Eclipse Public License - v 1.0 by the copyright holder
 * listed above, as the Initial Contributor under such license. The text of
 * such license is available at www.eclipse.org.
 ******************************************************************************/

package org.eclipse.buckminster.pde.ui.actions;

import org.eclipse.buckminster.core.CorePlugin;
import org.eclipse.buckminster.core.cspec.model.CSpec;
import org.eclipse.buckminster.core.cspec.model.ComponentIdentifier;
import org.eclipse.buckminster.core.cspec.model.ComponentRequest;
import org.eclipse.buckminster.core.ctype.IComponentType;
import org.eclipse.buckminster.core.metadata.WorkspaceInfo;
import org.eclipse.buckminster.core.metadata.model.Resolution;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.equinox.p2.metadata.Version;
import org.eclipse.equinox.p2.metadata.VersionRange;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.osgi.service.resolver.BundleDescription;
import org.eclipse.osgi.service.resolver.BundleSpecification;
import org.eclipse.pde.core.plugin.IPluginBase;
import org.eclipse.pde.core.plugin.IPluginModelBase;

/**
 * @author Thomas Hallgren
 * 
 */
public abstract class SelectionHelper {
	public static CSpec selectionChanged(ISelection selection) {
		if (!(selection instanceof IStructuredSelection))
			return null;

		IStructuredSelection s = (IStructuredSelection) selection;
		if (s.size() != 1)
			return null;

		Object first = s.getFirstElement();
		try {
			Resolution res = null;
			if (first instanceof IPluginModelBase)
				res = getResolution((IPluginModelBase) first);
			else if (first instanceof IPluginBase)
				res = getResolution((IPluginBase) first);
			else if (first instanceof BundleSpecification)
				res = getResolution((BundleSpecification) first);

			if (res != null)
				return res.getCSpec();
		} catch (CoreException e) {
			CorePlugin.getLogger().warning(e, e.getMessage());
		}
		return null;
	}

	private static Resolution getResolution(BundleSpecification spec) throws CoreException {
		org.eclipse.osgi.service.resolver.VersionRange osgiRange = spec.getVersionRange();
		VersionRange range = osgiRange == null ? null : new VersionRange(osgiRange.toString());
		ComponentRequest cr = new ComponentRequest(spec.getName(), IComponentType.OSGI_BUNDLE, range);
		return WorkspaceInfo.getResolution(cr, false);
	}

	private static Resolution getResolution(IPluginBase base) throws CoreException {
		return WorkspaceInfo
				.getResolution(new ComponentIdentifier(base.getId(), IComponentType.OSGI_BUNDLE, Version.parseVersion(base.getVersion())));
	}

	private static Resolution getResolution(IPluginModelBase model) throws CoreException {
		BundleDescription bundleDesc = model.getBundleDescription();
		if (bundleDesc == null)
			return null;

		org.osgi.framework.Version ov = bundleDesc.getVersion();
		Version v = ov == null ? null : Version.createOSGi(ov.getMajor(), ov.getMinor(), ov.getMicro(), ov.getQualifier());
		return WorkspaceInfo.getResolution(new ComponentIdentifier(bundleDesc.getSymbolicName(), IComponentType.OSGI_BUNDLE, v));
	}
}