/* * 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.zeppelin.markdown; import java.io.IOException; import java.util.List; import java.util.Properties; import org.apache.zeppelin.interpreter.Interpreter; import org.apache.zeppelin.interpreter.InterpreterContext; import org.apache.zeppelin.interpreter.InterpreterResult; import org.apache.zeppelin.interpreter.InterpreterResult.Code; import org.apache.zeppelin.interpreter.InterpreterUtils; import org.apache.zeppelin.scheduler.Scheduler; import org.apache.zeppelin.scheduler.SchedulerFactory; import org.markdown4j.Markdown4jProcessor; /** * Markdown interpreter for Zeppelin. */ public class Markdown extends Interpreter { private Markdown4jProcessor md; static { Interpreter.register("md", Markdown.class.getName()); } public Markdown(Properties property) { super(property); } @Override public void open() { md = new Markdown4jProcessor(); } @Override public void close() {} @Override public InterpreterResult interpret(String st, InterpreterContext interpreterContext) { String html; try { html = md.process(st); } catch (IOException | java.lang.RuntimeException e) { return new InterpreterResult(Code.ERROR, InterpreterUtils.getMostRelevantMessage(e)); } return new InterpreterResult(Code.SUCCESS, "%html " + html); } @Override public void cancel(InterpreterContext context) {} @Override public FormType getFormType() { return FormType.SIMPLE; } @Override public int getProgress(InterpreterContext context) { return 0; } @Override public Scheduler getScheduler() { return SchedulerFactory.singleton().createOrGetParallelScheduler( Markdown.class.getName() + this.hashCode(), 5); } @Override public List<String> completion(String buf, int cursor) { return null; } }