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/******************************************************************************* 
* Copyright (c) 2009 EclipseSource and others. 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:
*   EclipseSource - initial API and implementation
******************************************************************************/
package org.eclipse.equinox.p2.internal.repository.tools.analyzer;

import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.equinox.internal.p2.metadata.IRequiredCapability;
import org.eclipse.equinox.internal.provisional.p2.metadata.IInstallableUnitFragment;
import org.eclipse.equinox.p2.metadata.IInstallableUnit;
import org.eclipse.equinox.p2.metadata.IRequirement;
import org.eclipse.equinox.p2.metadata.query.InstallableUnitQuery;
import org.eclipse.equinox.p2.query.IQueryResult;
import org.eclipse.equinox.p2.repository.metadata.IMetadataRepository;
import org.eclipse.equinox.p2.repository.tools.analyzer.IUAnalyzer;

/**
 * This service checks that for each fragment the host can be resolved.
 * Currently this service only checks requirements with the namespace "osgi.bundle"
 */
public class HostCheckAnalyzer extends IUAnalyzer {

	private IMetadataRepository repository;

	public void analyzeIU(IInstallableUnit iu) {
		if (iu instanceof IInstallableUnitFragment) {
			IInstallableUnitFragment fragment = (IInstallableUnitFragment) iu;
			IRequirement[] hosts = fragment.getHost();
			for (int i = 0; i < hosts.length; i++) {
				IRequiredCapability theHost = null;
				if (hosts[i] instanceof IRequiredCapability)
					theHost = (IRequiredCapability) hosts[i];
				if (theHost.getNamespace().equals("osgi.bundle")) {
					IQueryResult<IInstallableUnit> results = repository.query(new InstallableUnitQuery(theHost.getName(), theHost.getRange()), new NullProgressMonitor());
					if (results.isEmpty()) {
						error(iu, "IU Fragment: " + iu.getId() + " cannot find host" + theHost.getName() + " : " + theHost.getRange());
						return;
					}
				}
			}
		}

	}

	public void preAnalysis(IMetadataRepository repository) {
		this.repository = repository;
	}

}

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