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diff --git a/support/arara/source/src/main/java/com/github/cereda/arara/model/Command.java b/support/arara/source/src/main/java/com/github/cereda/arara/model/Command.java
deleted file mode 100644
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--- a/support/arara/source/src/main/java/com/github/cereda/arara/model/Command.java
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@@ -1,127 +0,0 @@
-/**
- * Arara, the cool TeX automation tool
- * Copyright (c) 2012 -- 2019, Paulo Roberto Massa Cereda
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither the name of the project's author nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
- * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package com.github.cereda.arara.model;
-
-import com.github.cereda.arara.utils.CommonUtils;
-import java.io.File;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.List;
-
-/**
- * Implements a command model, containing a list of strings.
- * @author Paulo Roberto Massa Cereda
- * @version 4.0
- * @since 4.0
- */
-public class Command {
-
- // a list of elements which are components
- // of a command and represented as strings
- private final List<String> elements;
-
- // an optional file acting as a reference
- // for the default working directory
- private File workingDirectory;
-
- /**
- * Constructor.
- * @param values An array of objects.
- */
- public Command(Object... values) {
- elements = new ArrayList<String>();
- List result = CommonUtils.flatten(Arrays.asList(values));
- for (Object value : result) {
- String element = String.valueOf(value);
- if (!CommonUtils.checkEmptyString(element)) {
- elements.add(element);
- }
- }
- }
-
- /**
- * Constructor.
- * @param elements A list of strings.
- */
- public Command(List<String> elements) {
- this.elements = elements;
- }
-
- /**
- * Gets the list of strings representing each element of a command.
- * @return A list of strings.
- */
- public List<String> getElements() {
- return elements;
- }
-
- /**
- * Sets the working directory.
- * @param workingDirectory A file representing the working directory.
- */
- public void setWorkingDirectory(File workingDirectory) {
- this.workingDirectory = workingDirectory;
- }
-
- /**
- * Gets the working directory, if any.
- * @return A file representing the working directory.
- */
- public File getWorkingDirectory() {
- return workingDirectory;
- }
-
- /**
- * Checks if a working directory was defined.
- * @return A logic value indicating if a working directory was defined.
- */
- public boolean hasWorkingDirectory() {
- return workingDirectory != null;
- }
-
- /**
- * Provides a textual representation of the current command.
- * @return A string representing the current command.
- */
- @Override
- public String toString() {
- return CommonUtils.getCollectionElements(elements, "[ ", " ]", ", ").
- concat(
- hasWorkingDirectory()
- ? " @ " + workingDirectory.toString()
- : ""
- );
- }
-
-}