/*******************************************************************************
 * Copyright (c) 2007, 2008 IBM Corporation 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: IBM Corporation - initial API and implementation
 ******************************************************************************/
package org.eclipse.equinox.p2.tests;

import java.net.MalformedURLException;
import java.net.URL;
import java.util.*;
import junit.framework.Assert;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.equinox.internal.provisional.p2.core.repository.IRepository;
import org.eclipse.equinox.internal.provisional.p2.metadata.IInstallableUnit;
import org.eclipse.equinox.internal.provisional.p2.metadata.query.InstallableUnitQuery;
import org.eclipse.equinox.internal.provisional.p2.metadata.repository.IMetadataRepository;
import org.eclipse.equinox.internal.provisional.p2.query.Collector;
import org.eclipse.equinox.internal.provisional.p2.query.Query;
import org.eclipse.equinox.internal.provisional.spi.p2.metadata.repository.AbstractMetadataRepository;
import org.osgi.framework.Version;

/**
 * A simple metadata repository used for testing purposes.  All metadata
 * is kept in memory.
 */
public class TestMetadataRepository extends AbstractMetadataRepository {

	private static final String DESCRIPTION = "A Test Metadata Repository"; //$NON-NLS-1$
	private static final String NAME = "ATestMetadataRepository"; //$NON-NLS-1$
	private static final String PROVIDER = "org.eclipse"; //$NON-NLS-1$
	private static final String TYPE = "testmetadatarepo"; //$NON-NLS-1$
	private static final String VERSION = "1"; //$NON-NLS-1$
	private final List units = new ArrayList();

	private static URL createLocation() {
		try {
			//Just need a unique URL - we don't need to read/write this location
			return new URL("http://TestMetadataRepository.com/" + Long.toString(System.currentTimeMillis()));
		} catch (MalformedURLException e) {
			Assert.fail(e.getMessage());
		}
		return null;
	}

	public TestMetadataRepository(IInstallableUnit[] ius) {
		super(NAME, TYPE, VERSION, createLocation(), DESCRIPTION, PROVIDER);
		units.addAll(Arrays.asList(ius));
	}

	public void addInstallableUnits(IInstallableUnit[] toAdd) {
		units.addAll(Arrays.asList(toAdd));
	}

	public IInstallableUnit find(String id, String versionString) {
		Iterator result = query(new InstallableUnitQuery(id, new Version(versionString)), new Collector(), null).iterator();
		return (IInstallableUnit) (result.hasNext() ? result.next() : null);
	}

	public Object getAdapter(Class adapter) {
		if (adapter == TestMetadataRepository.class || adapter == IMetadataRepository.class || adapter == IRepository.class) {
			return this;
		}
		return null;
	}

	public Collector query(Query query, Collector collector, IProgressMonitor monitor) {
		return query.perform(units.iterator(), collector);
	}

	public void removeAll() {
		units.clear();
	}

	public boolean removeInstallableUnits(IInstallableUnit[] toRemove) {
		boolean modified = false;
		for (int i = 0; i < toRemove.length; i++) {
			modified |= units.remove(toRemove[i]);
		}
		return modified;
	}

	public void initialize(RepositoryState state) {
		this.name = state.Name;
		this.type = state.Type;
		this.version = state.Version.toString();
		this.provider = state.Provider;
		this.description = state.Description;
		this.location = state.Location;
		this.properties = state.Properties;
		this.units.addAll(Arrays.asList(state.Units));
	}
}