1 files changed, 139 insertions, 0 deletions
diff --git a/bundles/org.eclipse.equinox.p2.touchpoint.eclipse/src/org/eclipse/equinox/internal/p2/touchpoint/eclipse/AgentFromInstall.java b/bundles/org.eclipse.equinox.p2.touchpoint.eclipse/src/org/eclipse/equinox/internal/p2/touchpoint/eclipse/AgentFromInstall.java
new file mode 100644
index 000000000..917808718
--- /dev/null
+++ b/bundles/org.eclipse.equinox.p2.touchpoint.eclipse/src/org/eclipse/equinox/internal/p2/touchpoint/eclipse/AgentFromInstall.java
@@ -0,0 +1,139 @@
+/*******************************************************************************
+ * Copyright (c) 2013 Ericsson AB 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:
+ *     Ericsson AB - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.equinox.internal.p2.touchpoint.eclipse;
+
+import java.io.*;
+import java.net.URISyntaxException;
+import org.eclipse.core.runtime.URIUtil;
+import org.eclipse.equinox.internal.p2.engine.SimpleProfileRegistry;
+import org.eclipse.equinox.internal.provisional.frameworkadmin.*;
+import org.eclipse.equinox.p2.core.*;
+
+/**
+ * Given an eclipse installation folder and / or an eclipse configuration folder, 
+ * this class creates the agent representing the system point at.
+ */
+public class AgentFromInstall {
+	//Input
+	private File configurationFolder;
+	private File installFolder;
+	private IProvisioningAgentProvider agentProvider;
+
+	//Figured out
+	private String profileId;
+	private String p2DataAreaURI;
+	private String userSpecifiedProfileId;
+
+	private AgentFromInstall(IProvisioningAgentProvider agentProvider, File installFolder, File configurationFolder, String profileId) {
+		this.installFolder = installFolder;
+		this.configurationFolder = configurationFolder;
+		this.agentProvider = agentProvider;
+		this.userSpecifiedProfileId = profileId;
+	}
+
+	/** 
+	 * Creates an agent deriving the p2 data area from the information contained in the installFolder or the configurationFolder.
+	 * In the returned agent, the services will be initialized such that the SELF variable is bound to the default profile referred to in the configuration files.
+	 *  
+	 * @param agentProvider an instance of an agent provider from which the agent will be created. 
+	 * @param installFolder null or a file referring to the installation folder of eclipse.  
+	 * @param configurationFolder null or a file referring to the configuration folder of eclipse.
+	 * @param profileId null or the name of the expected profile. This value is used when the detection of the profile id from the configuration file does not succeed.   
+	 */
+	static public IProvisioningAgent createAgentFrom(IProvisioningAgentProvider agentProvider, File installFolder, File configurationFolder, String profileId) {
+		AgentFromInstall newInstance = new AgentFromInstall(agentProvider, installFolder, configurationFolder, profileId);
+		return newInstance.loadAgent();
+	}
+
+	private IProvisioningAgent loadAgent() {
+		if (installFolder != null) {
+			if (!installFolder.exists())
+				return null;
+			initializeFromConfigFiles();
+		} else {
+			initializeByGuessing();
+		}
+		if (profileId == null)
+			profileId = userSpecifiedProfileId;
+
+		if (profileId == null || p2DataAreaURI == null) {
+			return null;
+		}
+		return createAgent();
+	}
+
+	public IProvisioningAgent createAgent() {
+		IProvisioningAgent agent = null;
+		try {
+			agent = agentProvider.createAgent(URIUtil.fromString(p2DataAreaURI));
+		} catch (ProvisionException e) {
+			//Can't happen
+		} catch (URISyntaxException e) {
+			//Can't happen since we are always constructing the string from code that manipulate files (included the code in the Manipulator) 
+		}
+		agent.registerService("FORCED_SELF", profileId);
+		return agent;
+	}
+
+	private boolean initializeFromConfigFiles() {
+		FrameworkAdmin fwk = LazyManipulator.getFrameworkAdmin();
+		if (fwk == null)
+			return false;
+		Manipulator manipulator = fwk.getManipulator();
+		LauncherData launcherData = manipulator.getLauncherData();
+		launcherData.setFwConfigLocation(configurationFolder != null ? configurationFolder : new File(installFolder, "configuration/config.ini")); //$NON-NLS-1$
+		launcherData.setHome(installFolder);
+		try {
+			manipulator.load();
+		} catch (IllegalStateException e) {
+			return false;
+		} catch (FrameworkAdminRuntimeException e) {
+			return false;
+		} catch (IOException e) {
+			return false;
+		}
+		profileId = manipulator.getConfigData().getProperty("eclipse.p2.profile"); //$NON-NLS-1$
+		p2DataAreaURI = manipulator.getConfigData().getProperty("eclipse.p2.data.area"); //$NON-NLS-1$
+		return true;
+	}
+
+	private void initializeByGuessing() {
+		File p2Folder = new File(configurationFolder, "p2"); //$NON-NLS-1$
+		if (!p2Folder.exists()) {
+			p2Folder = new File(configurationFolder.getParentFile(), "p2"); //$NON-NLS-1$
+			if (!p2Folder.exists())
+				return;
+		}
+		p2DataAreaURI = p2Folder.toURI().toASCIIString();
+		if (profileId == null) {
+			profileId = findProfile(getProfileRegistryFolder(p2Folder));
+		}
+	}
+
+	private File getProfileRegistryFolder(File p2Folder) {
+		return new File(p2Folder, "org.eclipse.equinox.p2.engine/profileRegistry/"); //$NON-NLS-1$
+	}
+
+	private String findProfile(File profileDirectory) {
+		final String PROFILE_EXT = ".profile"; //$NON-NLS-1$
+		File[] profileDirectories = profileDirectory.listFiles(new FileFilter() {
+			public boolean accept(File pathname) {
+				return pathname.getName().endsWith(PROFILE_EXT) && pathname.isDirectory();
+			}
+		});
+		if (profileDirectories.length == 1) {
+			String directoryName = profileDirectories[0].getName();
+			return SimpleProfileRegistry.unescape(directoryName.substring(0, directoryName.lastIndexOf(PROFILE_EXT)));
+		}
+
+		return null;
+	}
+}