Java tutorial
package hadoopInstaller.configurationGeneration; /* * #%L * Hadoop Installer * %% * Copyright (C) 2015 - 2016 Julin Maestri * %% * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * #L% */ import java.io.IOException; import java.io.PrintWriter; import java.io.Writer; import java.text.MessageFormat; import java.util.HashMap; import java.util.Map; import java.util.Map.Entry; import org.apache.commons.vfs2.FileObject; public class EnvShBuilder { private Map<String, String> parameters; private String customConfig; private FileObject file; public EnvShBuilder(FileObject aFile) { this.file = aFile; this.parameters = new HashMap<>(); this.customConfig = new String(); } public void build() throws IOException { try (Writer writer = new PrintWriter(this.file.getContent().getOutputStream())) { for (Entry<String, String> entry : this.parameters.entrySet()) { writer.write(MessageFormat.format("export {0}={1}\n", entry.getKey(), entry.getValue())); //$NON-NLS-1$ } writer.write(this.customConfig); } } public void setCustomConfig(String config) { this.customConfig = config; } public void setHadoopPrefix(String string) { this.parameters.put("HADOOP_PREFIX", string); //$NON-NLS-1$ } public void setJavaHome(String string) { this.parameters.put("JAVA_HOME", string); //$NON-NLS-1$ } }