/*******************************************************************************
 * Copyright (c) 2002, 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
 *
 * Initial Contributors:
 * The following IBM employees contributed to the Remote System Explorer
 * component that contains this file: David McKnight, Kushal Munir,
 * Michael Berger, David Dykstal, Phil Coulthard, Don Yantzi, Eric Simpson,
 * Emily Bruner, Mazen Faraj, Adrian Storisteanu, Li Ding, and Kent Hawley.
 * 
 * Contributors:
 * David Dykstal (IBM) - [197036] All filter pools created on clean workspace
 * cleaned javadoc for renameSystemFilterPool
 * David Dykstal (IBM) - [222270] clean up interfaces in org.eclipse.rse.core.filters
 * Martin Oberhuber (Wind River) - [cleanup] Add API "since" Javadoc tags
 * David Dykstal (IBM) - [226561] Add API markup to RSE Javadocs where extend / implement is allowed
 *******************************************************************************/

package org.eclipse.rse.core.filters;

import java.util.List;

import org.eclipse.rse.core.model.IRSEPersistableContainer;
import org.eclipse.rse.core.model.ISystemProfile;

/**
 * A filter pool manager manages filter pools.
 * <p>
 * Further, this is the front door for working with filters too. By forcing all
 * filter related activity through a single point like this, we can ensure that
 * all changes are saved to disk, and events are fired properly.
 * 
 * @noimplement This interface is not intended to be implemented by clients.
 */
public interface ISystemFilterPoolManager extends IRSEPersistableContainer {
	// ---------------------------------
	// ATTRIBUTE METHODS
	// ---------------------------------
	/**
	 * Return the caller which instantiated the filter pool manager
	 */
	public ISystemFilterPoolManagerProvider getProvider();

	/**
	 * Return the owning profile for this provider
	 */
	public ISystemProfile getSystemProfile();

	/**
	 * Set the caller instance which instantiated the filter pool manager.
	 * This is only recorded to enable getProvider from any filter framework object.
	 */
	public void setProvider(ISystemFilterPoolManagerProvider caller);

	/**
	 * This is to set transient data that is subsequently queryable.
	 */
	public void setSystemFilterPoolManagerData(Object data);

	/**
	 * Return transient data set via setFilterPoolDataManager.
	 */
	public Object getSystemFilterPoolManagerData();

	/**
	 * Return the name of this manager.
	 * This matches the name of the folder, which is the parent of the individual filter pool folders.
	 */
	public String getName();

	/**
	 * Set the name of this manager.
	 */
	public void setName(String name);

	/**
	 * Return attribute indicating if filter pools managed by this manager support nested filters.
	 */
	public boolean supportsNestedFilters();

	/**
	 * Return attribute indicating if filters managed by this manager support nested duplicate filter strings.
	 */
	public boolean supportsDuplicateFilterStrings();

	/**
	 * Set attribute indicating if filter pools managed by this manager support nested filters, by default.
	 */
	public void setSupportsNestedFilters(boolean supports);

	/**
	 * Set attribute indicating if filters managed by this manager support duplicate filter strings, by default.
	 */
	public void setSupportsDuplicateFilterStrings(boolean supports);

	/**
	 * @return The value of the StringsCaseSensitive attribute
	 * Are filter strings in this filter case sensitive?
	 */
	public boolean isStringsCaseSensitive();

	/**
	 * @return The value of the StringsCaseSensitive attribute
	 * Are filter strings in this filter case sensitive?
	 * Same as isStringsCaseSensitive()
	 */
	public boolean areStringsCaseSensitive();

	/**
	 * Return false if the instantiation of this filter pool manager resulting in a new manager versus a restoration
	 */
	public boolean wasRestored();

	// ---------------------------------
	// FILTER POOL METHODS
	// ---------------------------------
	/**
	 * Get array of filter pool names currently existing.
	 */
	public String[] getSystemFilterPoolNames();

	/**
	 * Return array of SystemFilterPools managed by this manager.
	 */
	public ISystemFilterPool[] getSystemFilterPools();

	/**
	 * Given a filter pool name, return that filter pool object.
	 * If not found, returns null.
	 */
	public ISystemFilterPool getSystemFilterPool(String name);

	/**
	 * Return the first pool that has the default attribute set to true.
	 * If none found, returns null.
	 */
	public ISystemFilterPool getFirstDefaultSystemFilterPool();

	/**
	 * Create a new filter pool.
	 * Inherits the following attributes from this manager:
	 * <ul>
	 *   <li>data ... the transient data to be associated with every filter pool and filter
	 *   <li>supportsNestedFilters ... whether filters in the pool can themselves contain filters
	 * </ul>
	 * <p>
	 * If a pool of this name already exists, null will be returned.
	 * <p>
	 * Depending on the save policy, a new folder to hold the pool may be created. Its name will
	 *   be derived from the pool name.
	 * <p>
	 * If the operation is successful, the pool will be saved to disk.
	 * <p>
	 * If this operation fails unexpectedly, an exception will be thrown.
	 */
	public ISystemFilterPool createSystemFilterPool(String name, boolean isDeletable) throws Exception;

	/**
	 * Delete a given filter pool. Dependending on the save policy, the
	 *  appropriate file or folder on disk will also be deleted.
	 * <p>
	 * Does the following:
	 * <ul>
	 *   <li>Removes all references
	 *   <li>Removes pool object from in-memory model
	 *   <li>Removes folder from disk for policies of one folder per pool
	 *   <li>Removes file from disk for policy of one file per pool
	 *   <li>Saves model to disk for policy of one file per manager
	 *   <li>Invalidates in-memory caches
	 *   <li>Calls back to inform caller of this event
	 * </ul>
	 * @param pool The filter pool object to physically delete
	 */
	public void deleteSystemFilterPool(ISystemFilterPool pool) throws Exception;

	/**
	 * Delete all existing filter pools. Call this when you are about to delete this manager, say.
	 */
	public void deleteAllSystemFilterPools();

	/**
	 * Pre-test if we are going to run into any trouble renaming any of the files or folders
	 *  used to persist a filter pool.
	 * @return true if everything seems ok, false if a file/folder is in use.
	 */
	public boolean preTestRenameFilterPool(ISystemFilterPool pool) throws Exception;

	/**
	 * Rename a filter pool.
	 * <ul>
	 * <li>Renames pool object
	 * <li>Informs any filter pool references to this pool
	 * <li>Schedules a save of the pool object
	 * </ul>
	 * @param pool The filter pool object to rename
	 * @param newName The new name to give the pool
	 */
	public void renameSystemFilterPool(ISystemFilterPool pool, String newName) throws Exception;

	/**
	 * Copy the specified filter pool from this manager to this manager or another manager.
	 * <p>
	 * Does the following:
	 * <ul>
	 *   <li>Clones all filters within the pool
	 *   <li>Clones all filter strings within each filter
	 *   <li>Asks target manager to save to disk
	 *   <li>Calls back to target manager provider, unless callbacks are suspended
	 * </ul>
	 * @param targetMgr The target manager to copy our filter pool to. Can be this manager, but target pool name must be unique.
	 * @param pool The filter pool to copy
	 * @param newName The new name to give the copied pool
	 * @return the new copy of the copied system filter pool
	 */
	public ISystemFilterPool copySystemFilterPool(ISystemFilterPoolManager targetMgr, ISystemFilterPool pool, String newName) throws Exception;

	/**
	 * Copy all filter pools from this manager to another manager.
	 * <p>
	 * Does the following:
	 * <ul>
	 *   <li>Clones all filter pools
	 *   <li>Clones all filters within each pool
	 *   <li>Clones all filter strings within each filter
	 *   <li>Asks target manager to save to disk
	 *   <li>Does not callback to caller to fire events, assumes caller doesn't want to know
	 * </ul>
	 * @param targetMgr The target manager to copy our filter pools to
	 */
	public void copySystemFilterPools(ISystemFilterPoolManager targetMgr) throws Exception;

	/**
	 * Move the specified filter pool from this manager to another manager.
	 * <p>
	 * Does the following:
	 * <ul>
	 *   <li>Performs a {@link #copySystemFilterPool(ISystemFilterPoolManager, ISystemFilterPool, String) copySystemFilterPool} operation.
	 *   <li>If copy is successful, updates all references to reference the new copy.
	 *   <li>If copy is successful, deletes original filter pool in this manager
	 *   <li>If this final delete fails, deletes the copied version and restore original references
	 *   <li>Asks target manager to save to disk
	 *   <li>Saves this manager to disk
	 *   <li>Calls back to both targer manager provider and this manager provider, unless callbacks are suspended
	 * </ul>
	 * @param targetMgr The target manager to move our filter pool to. Cannot be this manager.
	 * @param oldPool The filter pool to move
	 * @param newName The new name to give the moved pool
	 * @return the new copy of the moved system filter pool
	 */
	public ISystemFilterPool moveSystemFilterPool(ISystemFilterPoolManager targetMgr, ISystemFilterPool oldPool, String newName) throws Exception;

	// ---------------------------------
	// FILTER METHODS
	// ---------------------------------
	/**
	 * Creates a new system filter within the given filter container (either a
	 * filter pool, or a filter). This creates the filter, and then saves the
	 * filter pool.
	 * <p>
	 * Calls back to provider to inform of the event (filterEventFilterCreated)
	 * 
	 * @param parent The parent which is either a SystemFilterPool or a
	 *            SystemFilter
	 * @param aliasName The name to give the new filter. Must be unique for this
	 *            pool.
	 * @param filterStrings The list of String objects that represent the filter
	 *            strings.
	 * @since org.eclipse.rse.core 3.0
	 */
	public ISystemFilter createSystemFilter(ISystemFilterContainer parent, String aliasName, String[] filterStrings) throws Exception;

	/**
	 * Creates a new system filter within the given filter container (either a
	 * filter pool, or a filter). This creates the filter, and then saves the
	 * filter pool.
	 * <p>
	 * Calls back to provider to inform of the event (filterEventFilterCreated)
	 * 
	 * @param parent The parent which is either a SystemFilterPool or a
	 *            SystemFilter
	 * @param aliasName The name to give the new filter. Must be unique for this
	 *            pool.
	 * @param filterStrings The list of String objects that represent the filter
	 *            strings.
	 * @since org.eclipse.rse.core 3.0
	 */
	public ISystemFilter createSystemFilter(ISystemFilterContainer parent, String aliasName, List filterStrings) throws Exception;

	/**
	 * Creates a new system filter that is typed. Same as
	 * {@link #createSystemFilter(ISystemFilterContainer, String, String[])} but
	 * takes a filter type as an additional parameter.
	 * <p>
	 * A filter's type is an arbitrary string that is not interpreted or used by
	 * the base framework. This is for use entirely by tools who wish to support
	 * multiple types of filters and be able to launch unique actions per type,
	 * say.
	 * 
	 * @param parent The parent which is either a SystemFilterPool or a
	 *            SystemFilter
	 * @param aliasName The name to give the new filter. Must be unique for this
	 *            pool.
	 * @param filterStrings The list of String objects that represent the filter
	 *            strings.
	 * @param type The type of this filter
	 * @since org.eclipse.rse.core 3.0
	 */
	public ISystemFilter createSystemFilter(ISystemFilterContainer parent, String aliasName, String[] filterStrings, String type) throws Exception;

	/**
	 * Creates a new system filter that is typed. Same as
	 * {@link #createSystemFilter(ISystemFilterContainer, String, String[])} but
	 * takes a filter type as an additional parameter.
	 * <p>
	 * A filter's type is an arbitrary string that is not interpreted or used by
	 * the base framework. This is for use entirely by tools who wish to support
	 * multiple types of filters and be able to launch unique actions per type,
	 * say.
	 * 
	 * @param parent The parent which is either a SystemFilterPool or a
	 *            SystemFilter
	 * @param aliasName The name to give the new filter. Must be unique for this
	 *            pool.
	 * @param filterStrings The list of String objects that represent the filter
	 *            strings.
	 * @param type The type of this filter
	 * @since org.eclipse.rse.core 3.0
	 */
	public ISystemFilter createSystemFilter(ISystemFilterContainer parent, String aliasName, List filterStrings, String type) throws Exception;

	/**
	 * Creates a new system filter that is typed and promptable Same as
	 * {@link #createSystemFilter(ISystemFilterContainer, String ,String[], String)}
	 * but takes a boolean indicating if it is promptable.
	 * <p>
	 * A promptable filter is one in which the user is prompted for information
	 * at expand time. There is no base filter framework support for this, but
	 * tools can query this attribute and do their own thing at expand time.
	 * 
	 * @param parent The parent which is either a SystemFilterPool or a
	 *            SystemFilter
	 * @param aliasName The name to give the new filter. Must be unique for this
	 *            pool.
	 * @param filterStrings The list of String objects that represent the filter
	 *            strings.
	 * @param type The type of this filter
	 * @param promptable Pass true if this is a promptable filter
	 * @since org.eclipse.rse.core 3.0
	 */
	public ISystemFilter createSystemFilter(ISystemFilterContainer parent, String aliasName, String[] filterStrings, String type, boolean promptable) throws Exception;

	/**
	 * Creates a new system filter that is typed and promptable Same as
	 * {@link #createSystemFilter(ISystemFilterContainer, String ,String[], String)}
	 * but takes a boolean indicating if it is promptable.
	 * <p>
	 * A promptable filter is one in which the user is prompted for information
	 * at expand time. There is no base filter framework support for this, but
	 * tools can query this attribute and do their own thing at expand time.
	 * 
	 * @param parent The parent which is either a SystemFilterPool or a
	 *            SystemFilter
	 * @param aliasName The name to give the new filter. Must be unique for this
	 *            pool.
	 * @param filterStrings The list of String objects that represent the filter
	 *            strings.
	 * @param type The type of this filter
	 * @param promptable Pass true if this is a promptable filter
	 * @since org.eclipse.rse.core 3.0
	 */
	public ISystemFilter createSystemFilter(ISystemFilterContainer parent, String aliasName, List filterStrings, String type, boolean promptable) throws Exception;

	/**
	 * Delete an existing system filter.
	 * Does the following:
	 * <ul>
	 *   <li>Removes filter from its parent in memory.
	 *   <li>If appropriate for the save policy, deletes the filter's file from disk.
	 *   <li>Save the SystemFilterPool which direct or indirectly contains the filter.
	 *   <li>Calls back to provider to inform of the event (filterEventFilterDelete)
	 * </ul>
	 */
	public boolean deleteSystemFilter(ISystemFilter filter) throws Exception;

	/**
	 * Renames a filter. This is better than filter.setName(String newName) as it
	 *  saves the parent pool to disk.
	 * <p>
	 * Does the following:
	 * <ul>
	 *   <li>Renames the object in the in-memory cache
	 *   <li>If appropriate for the save policy, rename's the filter's file on disk.
	 *   <li>Save parent filter pool's in-memory object to disk.
	 *   <li>Calls back to provider to inform of the event (filterEventFilterRenamed)
	 * </ul>
	 */
	public void renameSystemFilter(ISystemFilter filter, String newName) throws Exception;

	/**
	 * Updates a filter. This is better than doing it directly as it saves it to disk.
	 * <p>
	 * Does the following:
	 * <ul>
	 *   <li>Updates the object in the in-memory cache
	 *   <li>Save parent filter pool's in-memory object to disk.
	 *   <li>Calls back to provider to inform of the event (filterEventFilterUpdated). Will be two callbacks if the name is changed ((filterEventFilterRenamed)
	 * </ul>
	 */
	public void updateSystemFilter(ISystemFilter filter, String newName, String[] strings) throws Exception;

	/**
	 * Sets a filter's type. This is better than calling filter.setType(String) directly as it saves the filter to disk after.
	 * <p>
	 * A filter's type is an arbitrary string that is not interpreted or used by the base framework. This
	 * is for use entirely by tools who wish to support multiple types of filters and be able to launch unique
	 * actions per type, say.
	 * @param filter The parent which is either a SystemFilter
	 * @param newType The type of this filter
	 */
	public void setSystemFilterType(ISystemFilter filter, String newType) throws Exception;

	/**
	 * Copy a system filter to a pool in this or another filter manager.
	 */
	public ISystemFilter copySystemFilter(ISystemFilterPool targetPool, ISystemFilter oldFilter, String newName) throws Exception;

	/**
	 * Return the zero-based position of a SystemFilter object within its container
	 */
	public int getSystemFilterPosition(ISystemFilter filter);

	/**
	 * Move a system filter to a pool in this or another filter manager.
	 * Does this by first copying the filter, and only if successful, deleting the old copy.
	 */
	public ISystemFilter moveSystemFilter(ISystemFilterPool targetPool, ISystemFilter oldFilter, String newName) throws Exception;

	/**
	 * Move existing filters a given number of positions in the same container.
	 * If the delta is negative, they are all moved up by the given amount. If
	 * positive, they are all moved down by the given amount.<p>
	 * <p>
	 * Does the following:
	 * <ul>
	 *   <li>After the move, the pool containing the filter is saved to disk.
	 *   <li>Calls back to provider to inform of the event (filterEventFiltersRePositioned)
	 * </ul>
	 * @param filters Array of SystemFilters to move.
	 * @param delta the amount by which to move the filters
	 */
	public void moveSystemFilters(ISystemFilter filters[], int delta) throws Exception;

	/**
	 * Order filters according to user preferences.
	 * <p>
	 * While the framework has all the code necessary to arrange filters and save/restore
	 * that arrangement, you may choose to use preferences instead of this support.
	 * In this case, call this method and pass in the saved and sorted filter name list.
	 * <p>
	 * Called by someone after restore.
	 */
	public void orderSystemFilters(ISystemFilterPool pool, String[] names) throws Exception;

	// -------------------------------
	// SYSTEM FILTER STRING METHODS...
	// -------------------------------
	/**
	 * Append a new filter string to the given filter's list
	 * <p>
	 * Does the following:
	 * <ul>
	 *   <li>Adds the filter string to the in-memory cache
	 *   <li>Saves parent filter pool to disk.
	 *   <li>Calls back to provider to inform it of this event (filterEventFilterStringCreated)
	 * </ul>
	 */
	public ISystemFilterString addSystemFilterString(ISystemFilter filter, String newString) throws Exception;

	/**
	 * Insert a new filter string to the given filter's list, at the given zero-based position
	 * <p>
	 * Does the following:
	 * <ul>
	 *   <li>Adds the filter string to the in-memory cache
	 *   <li>Saves parent filter pool to disk.
	 *   <li>Calls back to provider to inform it of this event (filterEventFilterStringCreated)
	 * </ul>
	 */
	public ISystemFilterString addSystemFilterString(ISystemFilter filter, String newString, int position) throws Exception;

	/**
	 * Remove a filter string from this filter's list, given its SystemFilterString object.
	 * <p>
	 * Does the following:
	 * <ul>
	 *   <li>Removes the filter string from the in-memory cache
	 *   <li>Saves parent filter pool to disk.
	 *   <li>Calls back to provider to inform it of this event (filterEventFilterStringDeleted)
	 * </ul>
	 * @return true if the given string existed and hence was deleted.
	 */
	public boolean removeSystemFilterString(ISystemFilter filter, ISystemFilterString filterString) throws Exception;

	/**
	 * Delete a filter string from the given filter's list
	 * <p>
	 * Does the following:
	 * <ul>
	 *   <li>Removes the filter string from the in-memory cache
	 *   <li>Saves parent filter pool to disk.
	 *   <li>Calls back to provider to inform it of this event (filterEventFilterStringDeleted)
	 * </ul>
	 * @return true if given string was found and hence was deleted.
	 */
	public boolean removeSystemFilterString(ISystemFilter filter, String oldString) throws Exception;

	/**
	 * Remove a filter string from the given filter's list, given its zero-based position
	 * <p>
	 * Does the following:
	 * <ul>
	 *   <li>Removes the filter string from the in-memory cache
	 *   <li>Saves parent filter pool to disk.
	 *   <li>Calls back to provider to inform it of this event (filterEventFilterStringDeleted)
	 * </ul>
	 * @return true if a string existed at the given position and hence was deleted.
	 */
	public boolean removeSystemFilterString(ISystemFilter filter, int position) throws Exception;

	/**
	 * Update a filter string's string vale
	 * <p>
	 * Does the following:
	 * <ul>
	 *   <li>Update the filter string in the in-memory cache
	 *   <li>Saves parent filter pool to disk.
	 *   <li>Calls back to provider to inform it of this event (filterEventFilterStringUpdated)
	 * </ul>
	 */
	public void updateSystemFilterString(ISystemFilterString filterString, String newValue) throws Exception;

	/**
	 * Return the zero-based position of a SystemFilterString object within its filter
	 */
	public int getSystemFilterStringPosition(ISystemFilterString filterString);

	/**
	 * Copy a system filter string to a filter in this or another filter pool manager.
	 */
	public ISystemFilterString copySystemFilterString(ISystemFilter targetFilter, ISystemFilterString oldFilterString) throws Exception;

	/**
	 * Move a system filter string to a filter in this or another filter pool manager.
	 * Does this by doing a copy operation, then if successful doing a delete operation.
	 */
	public ISystemFilterString moveSystemFilterString(ISystemFilter targetFilter, ISystemFilterString oldFilterString) throws Exception;

	/**
	 * Move existing filter strings a given number of positions in the same filter
	 * If the delta is negative, they are all moved up by the given amount. If
	 * positive, they are all moved down by the given amount.<p>
	 * <p>
	 * Does the following:
	 * <ul>
	 *   <li>After the move, the filter pool containing the filter containing the filter strings is saved to disk.
	 *   <li>Calls back to provider to inform of the event (filterEventFilterStringsRePositioned)
	 * </ul>
	 * @param filterStrings Array of SystemFilterStrings to move.
	 * @param delta the amount by which to move the filters
	 */
	public void moveSystemFilterStrings(ISystemFilterString filterStrings[], int delta) throws Exception;

	// -----------------------------------
	// SUSPEND/RESUME CALLBACKS METHODS...
	// -----------------------------------
	/**
	 * Suspend callbacks to the provider
	 */
	public void suspendCallbacks(boolean suspend);

	/**
	 * @generated This field/method will be replaced during code generation
	 * @return The value of the SupportsNestedFilters attribute
	 */
	boolean isSupportsNestedFilters();

	/**
	 * @generated This field/method will be replaced during code generation
	 * @param value The new value of the StringsCaseSensitive attribute
	 */
	void setStringsCaseSensitive(boolean value);

	/**
	 * @generated This field/method will be replaced during code generation
	 * @return The value of the SupportsDuplicateFilterStrings attribute
	 */
	boolean isSupportsDuplicateFilterStrings();

	/**
	 * @generated This field/method will be replaced during code generation
	 * Unsets the SupportsDuplicateFilterStrings attribute
	 */
	void unsetSupportsDuplicateFilterStrings();

	/**
	 * @generated This field/method will be replaced during code generation
	 * @return <b>true</b> if the SupportsDuplicateFilterStrings attribute has been set
	 */
	boolean isSetSupportsDuplicateFilterStrings();

	/**
	 * Returns the value of the '<em><b>Single Filter String Only</b></em>' attribute.
	 * <!-- begin-user-doc -->
	 * <p>
	 * If the meaning of the '<em>Single Filter String Only</em>' attribute isn't clear,
	 * there really should be more of a description here...
	 * </p>
	 * <!-- end-user-doc -->
	 * @return the value of the '<em>Single Filter String Only</em>' attribute.
	 * @see #setSingleFilterStringOnly(boolean)
	 */
	boolean isSingleFilterStringOnly();

	/**
	 * Sets the value of the '{@link org.eclipse.rse.core.filters.ISystemFilterPoolManager#isSingleFilterStringOnly <em>Single Filter String Only</em>}' attribute.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @param value the new value of the '<em>Single Filter String Only</em>' attribute.
	 * @see #isSingleFilterStringOnly()
	 * @generated
	 */
	void setSingleFilterStringOnly(boolean value);

}
