/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.jena.sparql.core;
/** A {@code QuadAction} is record of a type of change to a {@code DatasetGraph}.
* <p>
* {@code DatasetGraph} are sets of quads.
* An {@code add} only affects the state of the {@code DatasetGraph}
* if a quad of the same value was not present,
* and a {@code delete} only affects the state of the {@code DatasetGraph}
* if a quad was present.
* <p>
* A {@code QuadAction} can be an {@code ADD} or {@code DELETE}, indicating a change
* to the {@code DatasetGraph} actually occured (this assumes checking is done -
* {@link DatasetChanges} generators may not check - see implementation for details).
* Otherwise a {@code NO_ADD}, {@code NO_DELETE} {@code QuadAction} is used.
*/
public enum QuadAction {
ADD("A"), DELETE("D"), NO_ADD("#A"), NO_DELETE("#D") ;
public final String label ;
QuadAction(String label) { this.label = label ; }
}