| /* |
| * 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.graph.impl; |
| |
| import org.apache.jena.graph.* ; |
| import org.apache.jena.util.iterator.ExtendedIterator ; |
| |
| import java.util.stream.Stream; |
| |
| /** |
| TripleStore - interface for bulk storage of triples used in composed graphs. |
| */ |
| public interface TripleStore |
| { |
| /** |
| Destroy this triple store - discard the indexes. |
| */ |
| public abstract void close(); |
| |
| /** |
| Add a triple to this triple store. |
| */ |
| public abstract void add( Triple t ); |
| |
| /** |
| Remove a triple from this triple store. |
| */ |
| public abstract void delete( Triple t ); |
| |
| /** |
| Answer the size (number of triples) of this triple store. |
| */ |
| public abstract int size(); |
| |
| /** |
| Answer true iff this triple store is empty. |
| */ |
| public abstract boolean isEmpty(); |
| |
| /** |
| Answer true iff this triple store contains the (concrete) triple <code>t</code>. |
| */ |
| public abstract boolean contains( Triple t ); |
| |
| /** |
| Answer true iff this triple store contains the triple match <code>t</code>. |
| */ |
| public abstract boolean containsMatch( Triple t ); |
| |
| /** |
| Answer an setwise iterator over all the subjects of triples in this store. |
| */ |
| public ExtendedIterator<Node> listSubjects(); |
| |
| /** |
| Answer an iterator over all the predicates of triples in this store. |
| */ |
| public ExtendedIterator<Node> listPredicates(); |
| |
| /** |
| Answer an setwise iterator over all the objects of triples in this store. |
| */ |
| public ExtendedIterator<Node> listObjects(); |
| |
| /** |
| Answer an ExtendedIterator returning all the triples from this store that |
| match the pattern <code>m = (S, P, O)</code>. |
| */ |
| public abstract ExtendedIterator<Triple> find( Triple t ); |
| |
| /** |
| Answer an ExtendedIterator returning all the triples from this store that |
| match the pattern <code>m = (S, P, O)</code>. |
| */ |
| public abstract Stream<Triple> stream(Node sm, Node pm, Node om); |
| |
| /** |
| Clear this store, ie remove all triples from it. |
| */ |
| public abstract void clear(); |
| } |