| /* |
| * 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.fuseki.servlets; |
| |
| import org.apache.jena.graph.Graph; |
| import org.apache.jena.graph.Node; |
| import org.apache.jena.sparql.core.DatasetGraph; |
| |
| /** Target of GSP operations */ |
| final class GSPTarget { |
| final boolean isDefault; |
| final DatasetGraph dsg; |
| private Graph _graph; |
| final String name; |
| final Node graphName; |
| |
| static GSPTarget createNamed(DatasetGraph dsg, String name, Node graphName) { |
| return new GSPTarget(false, dsg, name, graphName); |
| } |
| |
| static GSPTarget createDefault(DatasetGraph dsg) { |
| return new GSPTarget(true, dsg, null, null); |
| } |
| |
| /** |
| * Create a new Target which is like the original but aimed at a different |
| * DatasetGraph |
| */ |
| static GSPTarget retarget(GSPTarget target, DatasetGraph dsg) { |
| GSPTarget target2 = new GSPTarget(target, dsg); |
| target2._graph = null; |
| return target2; |
| } |
| |
| private GSPTarget(boolean isDefault, DatasetGraph dsg, String name, Node graphName) { |
| this.isDefault = isDefault; |
| this.dsg = dsg; |
| this._graph = null; |
| this.name = name; |
| this.graphName = graphName; |
| |
| if ( isDefault ) { |
| if ( name != null || graphName != null ) |
| throw new IllegalArgumentException("Inconsistent: default and a graph name/node"); |
| } else { |
| if ( name == null || graphName == null ) |
| throw new IllegalArgumentException("Inconsistent: not default and/or no graph name/node"); |
| } |
| } |
| |
| private GSPTarget(GSPTarget other, DatasetGraph dsg) { |
| this.isDefault = other.isDefault; |
| this.dsg = dsg; // other.dsg; |
| this._graph = other._graph; |
| this.name = other.name; |
| this.graphName = other.graphName; |
| } |
| |
| /** |
| * Get a graph for the action - this may create a graph in the dataset - this is |
| * not a test for graph existence |
| */ |
| public Graph graph() { |
| if ( !isGraphSet() ) { |
| if ( isDefault ) |
| _graph = dsg.getDefaultGraph(); |
| else |
| _graph = dsg.getGraph(graphName); |
| } |
| return _graph; |
| } |
| |
| public boolean exists() { |
| if ( isDefault ) |
| return true; |
| return dsg.containsGraph(graphName); |
| } |
| |
| public boolean isGraphSet() { |
| return _graph != null; |
| } |
| |
| @Override |
| public String toString() { |
| if ( isDefault ) |
| return "default"; |
| return name; |
| } |
| } |