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The main module contains the GeoTools public interfaces that are used by other GeoTools modules (and GeoTools applications). Where possible we make use industry standard terms as provided by OGC and ISO standards. The formal GeoTools public api consists of gt-metadata, jts and the gt-main module. The main module contains the default implementations that are available provided to other GeoTools modules using our factory system. Factories are obtained from an appropriate FactoryFinder, giving applications a chance configure the factory used using the Factory Hints facilities. FilterFactory ff = CommonFactoryFinder.getFilterFactory(); Expression expr = ff.add( expression1, expression2 ); If you find yourself using implementation specific classes chances are you doing it wrong: Expression expr = new AddImpl( expression1, expressiom2 );

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/*
 *    GeoTools - The Open Source Java GIS Toolkit
 *    http://geotools.org
 *
 *    (C) 2002-2008, Open Source Geospatial Foundation (OSGeo)
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License as published by the Free Software Foundation;
 *    version 2.1 of the License.
 *
 *    This library is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *    Lesser General Public License for more details.
 */
package org.geotools.data.directory;

import java.io.IOException;
import java.util.List;
import org.geotools.data.DataStore;
import org.geotools.data.FeatureLock;
import org.geotools.data.LockingManager;
import org.geotools.data.Transaction;

/**
 * Locking manager that will delegate its work to the locking managers of the delegate data stores
 *
 * @author Andrea Aime - OpenGeo
 */
public class DirectoryLockingManager implements LockingManager {

    DirectoryTypeCache cache;

    public DirectoryLockingManager(DirectoryTypeCache cache) {
        this.cache = cache;
    }

    public boolean exists(String authID) {
        List stores = cache.getDataStores();
        for (DataStore store : stores) {
            if ((store.getLockingManager() != null) && store.getLockingManager().exists(authID)) {
                return true;
            }
        }

        return false;
    }

    public boolean release(String authID, Transaction transaction) throws IOException {
        List stores = cache.getDataStores();
        for (DataStore store : stores) {
            if ((store.getLockingManager() != null) && store.getLockingManager().exists(authID)) {
                return store.getLockingManager().release(authID, transaction);
            }
        }

        return false;
    }

    public boolean refresh(String authID, Transaction transaction) throws IOException {
        List stores = cache.getDataStores();
        for (DataStore store : stores) {
            if ((store.getLockingManager() != null) && store.getLockingManager().exists(authID)) {
                return store.getLockingManager().refresh(authID, transaction);
            }
        }

        return false;
    }

    public void unLockFeatureID(
            String typeName, String authID, Transaction transaction, FeatureLock featureLock)
            throws IOException {
        DataStore store = cache.getDataStore(typeName, false);

        if ((store != null) && (store.getLockingManager() != null)) {
            store.getLockingManager().unLockFeatureID(typeName, authID, transaction, featureLock);
        }
    }

    public void lockFeatureID(
            String typeName, String authID, Transaction transaction, FeatureLock featureLock)
            throws IOException {
        DataStore store = cache.getDataStore(typeName, false);

        if ((store != null) && (store.getLockingManager() != null)) {
            store.getLockingManager().lockFeatureID(typeName, authID, transaction, featureLock);
        }
    }
}