Java tutorial
package org.apache.maven.model.io; /* * 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. */ import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import java.io.Reader; import java.util.Map; import java.util.Objects; import javax.inject.Named; import javax.inject.Singleton; import org.apache.maven.model.InputSource; import org.apache.maven.model.Model; import org.apache.maven.model.io.xpp3.MavenXpp3Reader; import org.apache.maven.model.io.xpp3.MavenXpp3ReaderEx; import org.codehaus.plexus.util.ReaderFactory; import org.codehaus.plexus.util.xml.XmlStreamReader; import org.codehaus.plexus.util.xml.pull.XmlPullParserException; /** * Handles deserialization of a model from some kind of textual format like XML. * * @author Benjamin Bentmann */ @Named @Singleton public class DefaultModelReader implements ModelReader { @Override public Model read(File input, Map<String, ?> options) throws IOException { Objects.requireNonNull(input, "input cannot be null"); Model model = read(new FileInputStream(input), options); model.setPomFile(input); return model; } @Override public Model read(Reader input, Map<String, ?> options) throws IOException { Objects.requireNonNull(input, "input cannot be null"); try (final Reader in = input) { return read(in, isStrict(options), getSource(options)); } } @Override public Model read(InputStream input, Map<String, ?> options) throws IOException { Objects.requireNonNull(input, "input cannot be null"); try (final XmlStreamReader in = ReaderFactory.newXmlReader(input)) { return read(in, isStrict(options), getSource(options)); } } private boolean isStrict(Map<String, ?> options) { Object value = (options != null) ? options.get(IS_STRICT) : null; return value == null || Boolean.parseBoolean(value.toString()); } private InputSource getSource(Map<String, ?> options) { Object value = (options != null) ? options.get(INPUT_SOURCE) : null; return (InputSource) value; } private Model read(Reader reader, boolean strict, InputSource source) throws IOException { try { if (source != null) { return new MavenXpp3ReaderEx().read(reader, strict, source); } else { return new MavenXpp3Reader().read(reader, strict); } } catch (XmlPullParserException e) { throw new ModelParseException(e.getMessage(), e.getLineNumber(), e.getColumnNumber(), e); } } }