bundles/org.eclipse.equinox.p2.ui.sdk.scheduler/src/org/eclipse/equinox/internal/p2/ui/sdk/scheduler/PreviousConfigurationFinder.java - equinox/rt.equinox.p2 - Git at Google

 package org.eclipse.equinox.internal.p2.ui.sdk.scheduler;

 import java.io.*;
 import java.net.URI;
 import java.net.URISyntaxException;
 import java.util.*;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 import org.eclipse.core.runtime.URIUtil;
 import org.eclipse.equinox.p2.core.IProvisioningAgent;
 import org.eclipse.equinox.p2.core.ProvisionException;
 import org.eclipse.equinox.p2.engine.IProfile;
 import org.eclipse.equinox.p2.engine.IProfileRegistry;

 public class PreviousConfigurationFinder {

 	private static final Pattern path = Pattern.compile("(.+)_(.*)_(\\d+)_.*"); //$NON-NLS-1$

 	static class Identifier {
 		private static final String DELIM = ". _-"; //$NON-NLS-1$
 		private int major, minor, service;

 		Identifier(int major, int minor, int service) {
 			super();
 			this.major = major;
 			this.minor = minor;
 			this.service = service;
 		}

 		/**
 		 * @throws NumberFormatException if cannot parse the major and minor version components
 		 */
 		Identifier(String versionString) {
 			super();
 			StringTokenizer tokenizer = new StringTokenizer(versionString, DELIM);

 			// major
 			if (tokenizer.hasMoreTokens())
 				major = Integer.parseInt(tokenizer.nextToken());

 			// minor
 			if (tokenizer.hasMoreTokens())
 				minor = Integer.parseInt(tokenizer.nextToken());

 			try {
 				// service
 				if (tokenizer.hasMoreTokens())
 					service = Integer.parseInt(tokenizer.nextToken());
 			} catch (NumberFormatException nfe) {
 				// ignore the service qualifier in that case and default to 0
 				// this will allow us to tolerate other non-conventional version numbers
 			}
 		}

 		/**
 		 * Returns true if this id is considered to be greater than or equal to the given baseline.
 		 * e.g.
 		 * 1.2.9 >= 1.3.1 -> false
 		 * 1.3.0 >= 1.3.1 -> false
 		 * 1.3.1 >= 1.3.1 -> true
 		 * 1.3.2 >= 1.3.1 -> true
 		 * 2.0.0 >= 1.3.1 -> true
 		 */
 		boolean isGreaterEqualTo(Identifier minimum) {
 			if (major < minimum.major)
 				return false;
 			if (major > minimum.major)
 				return true;
 			// major numbers are equivalent so check minor
 			if (minor < minimum.minor)
 				return false;
 			if (minor > minimum.minor)
 				return true;
 			// minor numbers are equivalent so check service
 			return service >= minimum.service;
 		}

 		@Override
 		public boolean equals(Object other) {
 			if (other instanceof Identifier)
 				return false;
 			Identifier o = (Identifier) other;
 			if (major == o.major && minor == o.minor && service == o.service)
 				return true;
 			return false;
 		}
 	}

 	static class ConfigurationData {
 		String productId;
 		Identifier version;
 		String installPathHashcode;
 		File config;

 		public ConfigurationData(String productId, Identifier version, String installPathHashcode, File config) {
 			this.productId = productId;
 			this.version = version;
 			this.installPathHashcode = installPathHashcode;
 			this.config = config;
 		}

 		public String getProductId() {
 			return productId;
 		}

 		public Identifier getVersion() {
 			return version;
 		}

 		public String getInstallPathHashcode() {
 			return installPathHashcode;
 		}

 		public File getConfig() {
 			return config;
 		}
 	}

 	private File currentConfig;

 	public PreviousConfigurationFinder(File currentConfiguration) {
 		currentConfig = currentConfiguration;
 	}

 	private ConfigurationData extractConfigurationData(File candidate) {
 		Matcher m = path.matcher(candidate.getName());
 		if (!m.matches())
 			return null;
 		return new ConfigurationData(m.group(1), new Identifier(m.group(2)), m.group(3), candidate.getAbsoluteFile());
 	}

 	public IProfile findPreviousInstalls(File searchRoot, File installFolder) {
 		List<ConfigurationData> potentialConfigurations = readPreviousConfigurations(searchRoot);
 		Object[] productInfo = loadEclipseProductFile(installFolder);
 		ConfigurationData match = findMostRelevantConfiguration(potentialConfigurations, getInstallDirHash(installFolder), productInfo);
 		if (match == null)
 			match = findMostRelevantConfiguration(potentialConfigurations, productInfo);
 		if (match == null)
 			return null;
 		return fromConfigurationToProfile(match.getConfig());
 	}

 	private IProfile fromConfigurationToProfile(File configurationFolder) {
 		//TODO dispose the agent
 		String toBeImportedProfileId = null;
 		File config = new File(configurationFolder, "configuration/config.ini"); //$NON-NLS-1$
 		URI configArea = config.getParentFile().toURI();
 		InputStream is = null;
 		// default area
 		File p2DataArea = new File(configurationFolder, "p2"); //$NON-NLS-1$
 		try {
 			Properties props = new Properties();
 			is = new FileInputStream(config);
 			props.load(is);
 			toBeImportedProfileId = props.getProperty("eclipse.p2.profile"); //$NON-NLS-1$
 			String url = props.getProperty("eclipse.p2.data.area"); //$NON-NLS-1$
 			if (url != null) {
 				final String CONFIG_DIR = "@config.dir/"; //$NON-NLS-1$
 				final String FILE_PROTOCOL = "file:"; //$NON-NLS-1$
 				if (url.startsWith(CONFIG_DIR))
 					url = FILE_PROTOCOL + url.substring(CONFIG_DIR.length());
 				p2DataArea = new File(URIUtil.makeAbsolute(URIUtil.fromString(new File(url.substring(FILE_PROTOCOL.length())).isAbsolute() ? url : url.substring(FILE_PROTOCOL.length())), configArea));
 			}
 		} catch (IOException ioe) {
 			//ignore
 		} catch (URISyntaxException e) {
 			return null;
 		} finally {
 			try {
 				is.close();
 			} catch (IOException ioe) {
 				//ignore
 			}
 			is = null;
 		}
 		if (p2DataArea.exists()) {
 			IProvisioningAgent agent = null;
 			try {
 				agent = AutomaticUpdatePlugin.getDefault().getAgentProvider().createAgent(p2DataArea.toURI());
 			} catch (ProvisionException e) {
 				//Can't happen
 			}
 			IProfileRegistry registry = (IProfileRegistry) agent.getService(IProfileRegistry.SERVICE_NAME);
 			if (toBeImportedProfileId != null)
 				return registry.getProfile(toBeImportedProfileId);

 			//TODO we may need to set the SELF profile on the registry to load the repos
 			IProfile[] allProfiles = registry.getProfiles();
 			if (allProfiles.length == 1)
 				return allProfiles[0];

 			//			IMetadataRepositoryManager metadataRepoMgr = (IMetadataRepositoryManager) agent.getService(IMetadataRepositoryManager.SERVICE_NAME);
 			//			URI[] metadataRepos = metadataRepoMgr.getKnownRepositories(IRepositoryManager.REPOSITORIES_NON_SYSTEM);
 			//TODO deal with the repos
 		}
 		return null;
 	}

 	private ConfigurationData findMostRelevantConfiguration(List<ConfigurationData> configurations, String installDirHash, Object[] productInfo) {
 		ConfigurationData bestMatch = null;
 		int numberOfcriteriaMet = 0;
 		for (ConfigurationData candidate : configurations) {
 			int criteriaMet = 0;
 			if (!candidate.getInstallPathHashcode().equals(installDirHash))
 				continue;
 			criteriaMet++;
 			if (!candidate.getProductId().equals(productInfo[0]))
 				continue;
 			criteriaMet++;
 			if (!candidate.getVersion().equals(productInfo[1]))
 				continue; //This is most likely ourselves
 			criteriaMet++;
 			if (criteriaMet > numberOfcriteriaMet) {
 				bestMatch = candidate;
 				numberOfcriteriaMet = criteriaMet;
 			} else if (criteriaMet == numberOfcriteriaMet) {
 				if (bestMatch.getConfig().lastModified() < candidate.getConfig().lastModified())
 					bestMatch = candidate;
 			}
 		}
 		return bestMatch;
 	}

 	//Out of a set of configuration, find the one with the most similar product info.
 	//TODO do we look for the higer or lower versions?
 	private ConfigurationData findMostRelevantConfiguration(List<ConfigurationData> configurations, Object[] productInfo) {
 		ConfigurationData bestMatch = null;
 		int numberOfcriteriaMet = 0;
 		for (ConfigurationData candidate : configurations) {
 			int criteriaMet = 0;
 			criteriaMet++;
 			if (!candidate.getProductId().equals(productInfo[0]))
 				continue;
 			criteriaMet++;
 			if (candidate.getVersion().equals(productInfo[1]))
 				continue; //This is most likely ourselves
 			else if (bestMatch != null && (candidate.getVersion().equals(bestMatch.getVersion())))
 				criteriaMet++;
 			if (criteriaMet > numberOfcriteriaMet) {
 				bestMatch = candidate;
 				numberOfcriteriaMet = criteriaMet;
 			} else if (criteriaMet == numberOfcriteriaMet) {
 				if (bestMatch.getConfig().lastModified() < candidate.getConfig().lastModified())
 					bestMatch = candidate;
 			}
 		}
 		return bestMatch;
 	}

 	//Load the .eclipseproduct file in the base of the installation. This logic is very similar to the one found in the launcher
 	private Object[] loadEclipseProductFile(File installDir) {
 		final String ECLIPSE = "eclipse"; //$NON-NLS-1$
 		final String PRODUCT_SITE_MARKER = ".eclipseproduct"; //$NON-NLS-1$
 		final String PRODUCT_SITE_ID = "id"; //$NON-NLS-1$
 		final String PRODUCT_SITE_VERSION = "version"; //$NON-NLS-1$

 		File eclipseProduct = new File(installDir, PRODUCT_SITE_MARKER);
 		String appId = null;
 		Identifier appVersion = null;
 		if (eclipseProduct.exists()) {
 			Properties props = new Properties();
 			try {
 				props.load(new FileInputStream(eclipseProduct));
 				appId = props.getProperty(PRODUCT_SITE_ID);
 				if (appId == null || appId.trim().length() == 0)
 					appId = ECLIPSE;
 				String version = props.getProperty(PRODUCT_SITE_VERSION);
 				if (version == null || version.trim().length() == 0)
 					appVersion = new Identifier(0, 0, 0);
 				else
 					appVersion = new Identifier(version);

 			} catch (IOException e) {
 				return new String[0];
 			}
 		} else {
 			return new String[0];
 		}
 		return new Object[] {appId, appVersion};
 	}

 	//Iterate through a folder to look for potential configuration folders and reify them.
 	private List<ConfigurationData> readPreviousConfigurations(File configurationFolder) {
 		File[] candidates = configurationFolder.listFiles();
 		List<ConfigurationData> configurations = new ArrayList<ConfigurationData>(candidates.length);
 		for (File candidate : candidates) {
 			if (!candidate.isDirectory())
 				continue;
 			if (candidate.equals(currentConfig))
 				continue;
 			ConfigurationData tmp = extractConfigurationData(candidate);
 			if (tmp != null)
 				configurations.add(tmp);
 		}
 		return configurations;
 	}

 	//Simplified code computing the hashCode of the install location. The real runtime code is in the launcher
 	private String getInstallDirHash(File installFolder) {
 		try {
 			return Integer.toString(installFolder.getCanonicalPath().hashCode());
 		} catch (IOException e) {
 			return ""; //$NON-NLS-1$
 		}
 	}
 }
	package org.eclipse.equinox.internal.p2.ui.sdk.scheduler;

	import java.io.*;
	import java.net.URI;
	import java.net.URISyntaxException;
	import java.util.*;
	import java.util.regex.Matcher;
	import java.util.regex.Pattern;
	import org.eclipse.core.runtime.URIUtil;
	import org.eclipse.equinox.p2.core.IProvisioningAgent;
	import org.eclipse.equinox.p2.core.ProvisionException;
	import org.eclipse.equinox.p2.engine.IProfile;
	import org.eclipse.equinox.p2.engine.IProfileRegistry;

	public class PreviousConfigurationFinder {

	private static final Pattern path = Pattern.compile("(.+)_(.)_(\\d+)_."); //$NON-NLS-1$

	static class Identifier {
	private static final String DELIM = ". _-"; //$NON-NLS-1$
	private int major, minor, service;

	Identifier(int major, int minor, int service) {
	super();
	this.major = major;
	this.minor = minor;
	this.service = service;
	}

	/**
	* @throws NumberFormatException if cannot parse the major and minor version components
	*/
	Identifier(String versionString) {
	super();
	StringTokenizer tokenizer = new StringTokenizer(versionString, DELIM);

	// major
	if (tokenizer.hasMoreTokens())
	major = Integer.parseInt(tokenizer.nextToken());

	// minor
	if (tokenizer.hasMoreTokens())
	minor = Integer.parseInt(tokenizer.nextToken());

	try {
	// service
	if (tokenizer.hasMoreTokens())
	service = Integer.parseInt(tokenizer.nextToken());
	} catch (NumberFormatException nfe) {
	// ignore the service qualifier in that case and default to 0
	// this will allow us to tolerate other non-conventional version numbers
	}
	}

	/**
	* Returns true if this id is considered to be greater than or equal to the given baseline.
	* e.g.
	* 1.2.9 >= 1.3.1 -> false
	* 1.3.0 >= 1.3.1 -> false
	* 1.3.1 >= 1.3.1 -> true
	* 1.3.2 >= 1.3.1 -> true
	* 2.0.0 >= 1.3.1 -> true
	*/
	boolean isGreaterEqualTo(Identifier minimum) {
	if (major < minimum.major)
	return false;
	if (major > minimum.major)
	return true;
	// major numbers are equivalent so check minor
	if (minor < minimum.minor)
	return false;
	if (minor > minimum.minor)
	return true;
	// minor numbers are equivalent so check service
	return service >= minimum.service;
	}

	@Override
	public boolean equals(Object other) {
	if (other instanceof Identifier)
	return false;
	Identifier o = (Identifier) other;
	if (major == o.major && minor == o.minor && service == o.service)
	return true;
	return false;
	}
	}

	static class ConfigurationData {
	String productId;
	Identifier version;
	String installPathHashcode;
	File config;

	public ConfigurationData(String productId, Identifier version, String installPathHashcode, File config) {
	this.productId = productId;
	this.version = version;
	this.installPathHashcode = installPathHashcode;
	this.config = config;
	}

	public String getProductId() {
	return productId;
	}

	public Identifier getVersion() {
	return version;
	}

	public String getInstallPathHashcode() {
	return installPathHashcode;
	}

	public File getConfig() {
	return config;
	}
	}

	private File currentConfig;

	public PreviousConfigurationFinder(File currentConfiguration) {
	currentConfig = currentConfiguration;
	}

	private ConfigurationData extractConfigurationData(File candidate) {
	Matcher m = path.matcher(candidate.getName());
	if (!m.matches())
	return null;
	return new ConfigurationData(m.group(1), new Identifier(m.group(2)), m.group(3), candidate.getAbsoluteFile());
	}

	public IProfile findPreviousInstalls(File searchRoot, File installFolder) {
	List<ConfigurationData> potentialConfigurations = readPreviousConfigurations(searchRoot);
	Object[] productInfo = loadEclipseProductFile(installFolder);
	ConfigurationData match = findMostRelevantConfiguration(potentialConfigurations, getInstallDirHash(installFolder), productInfo);
	if (match == null)
	match = findMostRelevantConfiguration(potentialConfigurations, productInfo);
	if (match == null)
	return null;
	return fromConfigurationToProfile(match.getConfig());
	}

	private IProfile fromConfigurationToProfile(File configurationFolder) {
	//TODO dispose the agent
	String toBeImportedProfileId = null;
	File config = new File(configurationFolder, "configuration/config.ini"); //$NON-NLS-1$
	URI configArea = config.getParentFile().toURI();
	InputStream is = null;
	// default area
	File p2DataArea = new File(configurationFolder, "p2"); //$NON-NLS-1$
	try {
	Properties props = new Properties();
	is = new FileInputStream(config);
	props.load(is);
	toBeImportedProfileId = props.getProperty("eclipse.p2.profile"); //$NON-NLS-1$
	String url = props.getProperty("eclipse.p2.data.area"); //$NON-NLS-1$
	if (url != null) {
	final String CONFIG_DIR = "@config.dir/"; //$NON-NLS-1$
	final String FILE_PROTOCOL = "file:"; //$NON-NLS-1$
	if (url.startsWith(CONFIG_DIR))
	url = FILE_PROTOCOL + url.substring(CONFIG_DIR.length());
	p2DataArea = new File(URIUtil.makeAbsolute(URIUtil.fromString(new File(url.substring(FILE_PROTOCOL.length())).isAbsolute() ? url : url.substring(FILE_PROTOCOL.length())), configArea));
	}
	} catch (IOException ioe) {
	//ignore
	} catch (URISyntaxException e) {
	return null;
	} finally {
	try {
	is.close();
	} catch (IOException ioe) {
	//ignore
	}
	is = null;
	}
	if (p2DataArea.exists()) {
	IProvisioningAgent agent = null;
	try {
	agent = AutomaticUpdatePlugin.getDefault().getAgentProvider().createAgent(p2DataArea.toURI());
	} catch (ProvisionException e) {
	//Can't happen
	}
	IProfileRegistry registry = (IProfileRegistry) agent.getService(IProfileRegistry.SERVICE_NAME);
	if (toBeImportedProfileId != null)
	return registry.getProfile(toBeImportedProfileId);

	//TODO we may need to set the SELF profile on the registry to load the repos
	IProfile[] allProfiles = registry.getProfiles();
	if (allProfiles.length == 1)
	return allProfiles[0];

	// IMetadataRepositoryManager metadataRepoMgr = (IMetadataRepositoryManager) agent.getService(IMetadataRepositoryManager.SERVICE_NAME);
	// URI[] metadataRepos = metadataRepoMgr.getKnownRepositories(IRepositoryManager.REPOSITORIES_NON_SYSTEM);
	//TODO deal with the repos
	}
	return null;
	}

	private ConfigurationData findMostRelevantConfiguration(List<ConfigurationData> configurations, String installDirHash, Object[] productInfo) {
	ConfigurationData bestMatch = null;
	int numberOfcriteriaMet = 0;
	for (ConfigurationData candidate : configurations) {
	int criteriaMet = 0;
	if (!candidate.getInstallPathHashcode().equals(installDirHash))
	continue;
	criteriaMet++;
	if (!candidate.getProductId().equals(productInfo[0]))
	continue;
	criteriaMet++;
	if (!candidate.getVersion().equals(productInfo[1]))
	continue; //This is most likely ourselves
	criteriaMet++;
	if (criteriaMet > numberOfcriteriaMet) {
	bestMatch = candidate;
	numberOfcriteriaMet = criteriaMet;
	} else if (criteriaMet == numberOfcriteriaMet) {
	if (bestMatch.getConfig().lastModified() < candidate.getConfig().lastModified())
	bestMatch = candidate;
	}
	}
	return bestMatch;
	}

	//Out of a set of configuration, find the one with the most similar product info.
	//TODO do we look for the higer or lower versions?
	private ConfigurationData findMostRelevantConfiguration(List<ConfigurationData> configurations, Object[] productInfo) {
	ConfigurationData bestMatch = null;
	int numberOfcriteriaMet = 0;
	for (ConfigurationData candidate : configurations) {
	int criteriaMet = 0;
	criteriaMet++;
	if (!candidate.getProductId().equals(productInfo[0]))
	continue;
	criteriaMet++;
	if (candidate.getVersion().equals(productInfo[1]))
	continue; //This is most likely ourselves
	else if (bestMatch != null && (candidate.getVersion().equals(bestMatch.getVersion())))
	criteriaMet++;
	if (criteriaMet > numberOfcriteriaMet) {
	bestMatch = candidate;
	numberOfcriteriaMet = criteriaMet;
	} else if (criteriaMet == numberOfcriteriaMet) {
	if (bestMatch.getConfig().lastModified() < candidate.getConfig().lastModified())
	bestMatch = candidate;
	}
	}
	return bestMatch;
	}

	//Load the .eclipseproduct file in the base of the installation. This logic is very similar to the one found in the launcher
	private Object[] loadEclipseProductFile(File installDir) {
	final String ECLIPSE = "eclipse"; //$NON-NLS-1$
	final String PRODUCT_SITE_MARKER = ".eclipseproduct"; //$NON-NLS-1$
	final String PRODUCT_SITE_ID = "id"; //$NON-NLS-1$
	final String PRODUCT_SITE_VERSION = "version"; //$NON-NLS-1$

	File eclipseProduct = new File(installDir, PRODUCT_SITE_MARKER);
	String appId = null;
	Identifier appVersion = null;
	if (eclipseProduct.exists()) {
	Properties props = new Properties();
	try {
	props.load(new FileInputStream(eclipseProduct));
	appId = props.getProperty(PRODUCT_SITE_ID);
	if (appId == null \|\| appId.trim().length() == 0)
	appId = ECLIPSE;
	String version = props.getProperty(PRODUCT_SITE_VERSION);
	if (version == null \|\| version.trim().length() == 0)
	appVersion = new Identifier(0, 0, 0);
	else
	appVersion = new Identifier(version);

	} catch (IOException e) {
	return new String[0];
	}
	} else {
	return new String[0];
	}
	return new Object[] {appId, appVersion};
	}

	//Iterate through a folder to look for potential configuration folders and reify them.
	private List<ConfigurationData> readPreviousConfigurations(File configurationFolder) {
	File[] candidates = configurationFolder.listFiles();
	List<ConfigurationData> configurations = new ArrayList<ConfigurationData>(candidates.length);
	for (File candidate : candidates) {
	if (!candidate.isDirectory())
	continue;
	if (candidate.equals(currentConfig))
	continue;
	ConfigurationData tmp = extractConfigurationData(candidate);
	if (tmp != null)
	configurations.add(tmp);
	}
	return configurations;
	}

	//Simplified code computing the hashCode of the install location. The real runtime code is in the launcher
	private String getInstallDirHash(File installFolder) {
	try {
	return Integer.toString(installFolder.getCanonicalPath().hashCode());
	} catch (IOException e) {
	return ""; //$NON-NLS-1$
	}
	}
	}