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+/**
+ * Arara, the cool TeX automation tool
+ * Copyright (c) 2012 -- 2018, 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.controller.ConfigurationController;
+import com.github.cereda.arara.controller.LanguageController;
+import com.github.cereda.arara.utils.CommonUtils;
+import com.github.cereda.arara.utils.DirectiveUtils;
+import java.io.File;
+import java.io.IOException;
+import java.nio.charset.Charset;
+import java.util.List;
+import org.apache.commons.io.FileUtils;
+
+/**
+ * It extracts directives from the provided main file.
+ * @author Paulo Roberto Massa Cereda
+ * @version 4.0
+ * @since 4.0
+ */
+public class Extractor {
+
+ // the application messages obtained from the
+ // language controller
+ private static final LanguageController messages =
+ LanguageController.getInstance();
+
+ /**
+ * Extracts a list of directives from the provided main file, obtained from
+ * the configuration controller.
+ * @return A list of directives.
+ * @throws AraraException Something wrong happened, to be caught in the
+ * higher levels.
+ */
+ public List<Directive> extract() throws AraraException {
+
+ File file = (File) ConfigurationController.
+ getInstance().get("execution.reference");
+ Charset charset = (Charset) ConfigurationController.
+ getInstance().get("directives.charset");
+
+ try {
+ List<String> content = CommonUtils.getPreambleContent();
+ List<String> lines = FileUtils.readLines(file, charset.name());
+ content.addAll(lines);
+ return DirectiveUtils.extractDirectives(content);
+ } catch (IOException ioexception) {
+ throw new AraraException(
+ messages.getMessage(
+ Messages.ERROR_EXTRACTOR_IO_ERROR
+ ),
+ ioexception
+ );
+ }
+ }
+
+}