Github user rvesse commented on a diff in the pull request: https://github.com/apache/jena/pull/431#discussion_r194338419 --- Diff: jena-arq/src/main/java/org/apache/jena/sparql/graph/PrefixMappingBase.java --- @@ -0,0 +1,277 @@ +/* + * 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.graph; + +import java.util.Map; +import java.util.Map.Entry; +import java.util.Optional; +import java.util.StringJoiner; +import java.util.function.BiConsumer; + +import org.apache.jena.ext.xerces.util.XMLChar; +import org.apache.jena.shared.PrefixMapping; +import org.apache.jena.util.SplitIRI; + +/** + * Framework for implementing {@link PrefixMapping}. It is stateless (unlike + * {@code PrefixMappingImpl}) and implements the contract of {@link PrefixMapping}, + * providing the key algorithm and delegating storage to the subclasses. + * <p> + * Reverse mapping, looking up a URI to find a prefix is complex. There may be several + * possibilities. Applications should not reliy on every implementat being consistent, + * espeically when writing data when there has to be a choice on on prefix to use to + * shorten a URI. + * + */ +public abstract class PrefixMappingBase implements PrefixMapping { + /* Reverse mappings. + * The strict contract of PrefixMapping requires a separate reversemapping to be storoed and manipuated --- End diff -- Typos: - Missing space in `reverse mapping` - `storoed` - `manipuated`
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