org.geotools.data.CurrentTransactionLock Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of gt-main Show documentation

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 );

The newest version!

/*
 *    GeoTools - The Open Source Java GIS Toolkit
 *    http://geotools.org
 *
 *    (C) 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;

/**
 * A request for a Lock that last the duration of a transaction.
 *
 * The single instance of this class is available as FeatureLock.TRANSACTION.
 */
class CurrentTransactionLock extends FeatureLock {

    CurrentTransactionLock() {
        super(null, -1);
    }
    /**
     * Transaction locks do not require Authorization.
     *
     * 
Authorization is based on being on "holding" the Transaction rather than supplying an
     * authorization id.
     *
     * @return CURRENT_TRANSACTION to aid in debugging.
     * @see org.geotools.data.FeatureLock#getAuthorization()
     */
    public String getAuthorization() {
        return toString();
    }

    /**
     * Transaciton locks are not held for a duration.
     *
     * Any locking performed against the current Transaction is expected to expire when the
     * transaction finishes with a close or rollback
     *
     * @return -1 representing an invalid duration
     * @see org.geotools.data.FeatureLock#getDuration()
     */
    public long getDuration() {
        return -1;
    }

    public String toString() {
        return "CURRENT_TRANSACTION";
    }
}