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/**
 * Copyright (C) 2006 Apache Software Foundation ([email protected])
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package net.sf.webdav.locking;

import net.sf.webdav.exceptions.LockFailedException;
import net.sf.webdav.spi.ITransaction;

public interface IResourceLocks {

    /**
     * Tries to lock the resource at "path".
     * 
     * @param transaction
     * @param path
     *      what resource to lock
     * @param owner
     *      the owner of the lock
     * @param exclusive
     *      if the lock should be exclusive (or shared)
     * @param depth
     *      depth
     * @param timeout
     *      Lock Duration in seconds.
     * @return true if the resource at path was successfully locked, false if an
     *  existing lock prevented this
     * @throws LockFailedException
     */
    boolean lock(ITransaction transaction, String path, String owner,
            boolean exclusive, int depth, int timeout, boolean temporary)
            throws LockFailedException;

    /**
     * Unlocks all resources at "path" (and all subfolders if existing) that
     * have the same owner.
     * 
     * @param transaction
     * @param id
     *      id to the resource to unlock
     * @param owner
     *      who wants to unlock
     */
    boolean unlock(ITransaction transaction, String id, String owner);

    /**
     * Unlocks all resources at "path" (and all subfolders if existing) that
     * have the same owner.
     * 
     * @param transaction
     * @param path
     *      what resource to unlock
     * @param owner
     *      who wants to unlock
     */
    void unlockTemporaryLockedObjects(ITransaction transaction, String path,
            String owner);

    /**
     * Deletes LockedObjects, where timeout has reached.
     * 
     * @param transaction
     * @param temporary
     *      Check timeout on temporary or real locks
     */
    void checkTimeouts(ITransaction transaction, boolean temporary);

    /**
     * Tries to lock the resource at "path" exclusively.
     * 
     * @param transaction
     *      Transaction
     * @param path
     *      what resource to lock
     * @param owner
     *      the owner of the lock
     * @param depth
     *      depth
     * @param timeout
     *      Lock Duration in seconds.
     * @return true if the resource at path was successfully locked, false if an
     *  existing lock prevented this
     * @throws LockFailedException
     */
    boolean exclusiveLock(ITransaction transaction, String path, String owner,
            int depth, int timeout) throws LockFailedException;

    /**
     * Tries to lock the resource at "path" shared.
     * 
     * @param transaction
     *      Transaction
     * @param path
     *      what resource to lock
     * @param owner
     *      the owner of the lock
     * @param depth
     *      depth
     * @param timeout
     *      Lock Duration in seconds.
     * @return true if the resource at path was successfully locked, false if an
     *  existing lock prevented this
     * @throws LockFailedException
     */
    boolean sharedLock(ITransaction transaction, String path, String owner,
            int depth, int timeout) throws LockFailedException;

    /**
     * Gets the LockedObject corresponding to specified id.
     * 
     * @param transaction
     * @param id
     *      LockToken to requested resource
     * @return LockedObject or null if no LockedObject on specified path exists
     */
    LockedObject getLockedObjectByID(ITransaction transaction, String id);

    /**
     * Gets the LockedObject on specified path.
     * 
     * @param transaction
     * @param path
     *      Path to requested resource
     * @return LockedObject or null if no LockedObject on specified path exists
     */
    LockedObject getLockedObjectByPath(ITransaction transaction, String path);

    /**
     * Gets the LockedObject corresponding to specified id (locktoken).
     * 
     * @param transaction
     * @param id
     *      LockToken to requested resource
     * @return LockedObject or null if no LockedObject on specified path exists
     */
    LockedObject getTempLockedObjectByID(ITransaction transaction, String id);

    /**
     * Gets the LockedObject on specified path.
     * 
     * @param transaction
     * @param path
     *      Path to requested resource
     * @return LockedObject or null if no LockedObject on specified path exists
     */
    LockedObject getTempLockedObjectByPath(ITransaction transaction, String path);

}