| /** |
| * 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.riot; |
| |
| import java.util.ArrayList ; |
| import java.util.List ; |
| |
| |
| |
| /** Builder for RDF languages (Syntaxes). |
| * |
| * Example usage: |
| * <pre> |
| * LangBuilder.create() |
| * .langName("MyLang") |
| * .contentType("application/wizard") |
| * .addAltContentTypes(...) |
| * .addFileExtensions("ext1", "ext2") |
| * .build() |
| * </pre> |
| * |
| * */ |
| |
| public class LangBuilder { |
| public String lang ; |
| public String officialContentType ; |
| public List<String> altNames = new ArrayList<>() ; |
| public List<String> contentTypes = new ArrayList<>() ; |
| public List<String> fileExtensions = new ArrayList<>() ; |
| |
| /** Create a builder */ |
| public static LangBuilder create() |
| { |
| return new LangBuilder() ; |
| } |
| |
| /** Create a builder - convenience operation to |
| * take the language name and content type |
| * which should be set if at all possible. |
| * @param langname |
| * @param officialContentType |
| */ |
| public static LangBuilder create(String langname, String officialContentType) |
| { |
| return new LangBuilder() |
| .langName(langname) |
| .contentType(officialContentType) ; |
| } |
| |
| private LangBuilder() {} |
| |
| /** Add alternative names */ |
| public LangBuilder addAltNames(String...x) |
| { |
| copy(x, altNames) ; |
| return this ; |
| } |
| |
| /** Add alternative content types */ |
| public LangBuilder addAltContentTypes(String...x) |
| { |
| copy(x, contentTypes) ; |
| return this ; |
| } |
| |
| /** Add file name extensions */ |
| public LangBuilder addFileExtensions(String...x) |
| { |
| copy(x, fileExtensions) ; |
| return this ; |
| } |
| |
| private static void copy(String[] src, List<String> dst) |
| { |
| for ( String str : src ) |
| if ( !dst.contains(str) ) |
| dst.add(str) ; |
| } |
| |
| /** Construct the {@link Lang} */ |
| public Lang build() |
| { |
| if ( lang == null ) |
| error("No language name") ; |
| if ( officialContentType == null ) |
| error("No content types") ; |
| return new Lang(lang, officialContentType, altNames, contentTypes, fileExtensions) ; |
| } |
| |
| private void error(String message) |
| { |
| throw new RiotException(message) ; |
| } |
| |
| public String getContentType() |
| { |
| return officialContentType ; |
| } |
| |
| /** Set the main content type for this language. |
| * If there is an officially registered, preferred type, this should be that. |
| */ |
| public LangBuilder contentType(String officialContentType) |
| { |
| this.officialContentType = officialContentType ; |
| return this ; |
| } |
| |
| /** Set the language label. A system wide, unique short name */ |
| public LangBuilder langName(String langname) |
| { |
| this.lang = langname ; |
| return this ; |
| } |
| } |