plugins/org.eclipse.epp.installer.core/src/org/eclipse/epp/installer/internal/core/RemoveFileAction.java

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

import java.io.File;
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.List;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.epp.installer.core.model.IRollbackAction;


/**
 * RemoveFileAction used to remove files and directories.
 * 
 * @author andrey
 * @version $Revision: 1.1 $
 */
public class RemoveFileAction implements IRollbackAction {

	/**
	 * List of delete failures. For each failure may be used
	 * {@link org.eclipse.epp.installer.internal.core.OS#DeleteFileOnReboot(String) }
	 * operation to delete files on reboot.
	 */
	private List failures = new ArrayList();

	/**
	 * Execute action.
	 * 
	 * @param entry
	 *            InstallLogEntry to get data from.
	 * @return IStatus <code>Status.OK_STATUS</code> failures are saved.
	 * @see org.eclipse.epp.installer.core.model.IRollbackAction#rollback(InstallLogEntry)
	 */
	public IStatus rollback(InstallLogEntry entry) {
		File file = new File(entry.getArgument());
		if (file.exists()) {
			File[] list = file.listFiles();
			if (list != null && list.length > 0) {
				failures.add(file);
			} else {
				if (!file.delete()) {
					failures.add(file);
				}
			}
		}
		return Status.OK_STATUS;
		/*
		 * return new Status(IStatus.INFO, Installer.PLUGIN_ID, 0, "Can't remove
		 * file or directory: " + file.getAbsolutePath(), null);
		 */
	}

	/**
	 * Return action description.
	 * 
	 * @param entry
	 *            InstallLogEntry entry to get data from.
	 * @return String action description.
	 * @see org.eclipse.epp.installer.core.model.IRollbackAction#getDescription(InstallLogEntry)
	 */
	public String getDescription(InstallLogEntry entry) {
		return MessageFormat.format("Removing file {0}.", new Object[] { entry
				.getArgument() });
	}

	/**
	 * Return failure files list.
	 * 
	 * @return List of failure files.
	 */
	public List getFailures() {
		return failures;
	}
}