plugins/org.eclipse.epp.installer.core/src/org/eclipse/epp/installer/core/operations/CreateEclipseUninstallerOperation.java

package org.eclipse.epp.installer.core.operations;

import java.io.File;
import java.io.IOException;

import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;
import org.eclipse.epp.installer.core.InstallOptions;
import org.eclipse.epp.installer.core.model.Context;
import org.eclipse.epp.installer.core.model.ISequence;
import org.eclipse.epp.installer.core.model.SingletonOperation;
import org.eclipse.epp.installer.internal.core.operations.FinaliseBackupOperation;
import org.eclipse.epp.installer.internal.core.operations.SaveLogFileOperation;


public class CreateEclipseUninstallerOperation extends SingletonOperation implements
		ISequence {

	private static final String INSTALLER_CONFIGURATION_DIR = "installer";

	/**
	 * Install log file name.
	 */
	public static final String INSTALL_LOG = "install.log";

	/**
	 * Install directory.
	 */
	private File installDirectory;
	private InstallOptions installOptions;

	public CreateEclipseUninstallerOperation(InstallOptions installOptions, File installDirectory) {
		if (installDirectory == null || installOptions == null) {
			throw new IllegalArgumentException();
		}
		this.installOptions = installOptions;
		this.installDirectory = installDirectory;
	}

	/**
	 * Prepare operation.
	 * 
	 * @throws IOException
	 *             throws exception if file operations could not be complited.
	 */
	protected void prepare() throws IOException {
		IPath eclipsePath = new Path(installDirectory.getAbsolutePath()).addTrailingSeparator();
		String installerConfigurationPath = eclipsePath.append(INSTALLER_CONFIGURATION_DIR).toOSString();
		String uninstallCmd = "\"" + eclipsePath.append("eclipse").toOSString() + "\"" +  
			" -configuration " + "\"" + installerConfigurationPath + "\"" +  
			" -nosplash" +
			" -vmargs" +
//				" -D" + Context.INSTALLER_JAR_PROPERTY + "=" + System.getProperty(Context.INSTALLER_JAR_PROPERTY) +
				" -D" + Context.INSTALLER_CONFIGURATION_TYPE_PROPERTY + "=uninstall";
		addPrerequisite(new RegisterProductOperation(installOptions, uninstallCmd));
		addPrerequisite(new SaveLogFileOperation(new File(installDirectory, INSTALL_LOG)));
		addPrerequisite(new FinaliseBackupOperation());
	}

	/**
	 * Return string representation.
	 * 
	 * @return Return string representation.
	 */
	public String toString() {
		return "Creating uninstaller...";
	}

}