Adding dependency injection

Defining a Dagger Module

Author: Warkdev

pom.xml

@@ -3,7 +3,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>eu.jangos</groupId>
     <artifactId>JaNGOSExtractor</artifactId>
-    <version>1.0</version>
+    <version>1.1</version>
     <packaging>jar</packaging>
     <properties>
         <java.version>11</java.version>
@@ -19,6 +19,13 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.8.0</version>
+                <dependencies>
+                    <dependency>
+                        <groupId>com.google.dagger</groupId>
+                        <artifactId>dagger-compiler</artifactId>
+                        <version>2.21</version>
+                    </dependency>
+                </dependencies>
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
@@ -92,6 +99,11 @@
             <version>5.4.1</version>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>com.google.dagger</groupId>
+            <artifactId>dagger</artifactId>
+            <version>2.21</version>
+        </dependency>
     </dependencies>
 
     <name>JaNGOSExtractor</name>

src/main/java/eu/jangos/extractor/di/ExtractorModule.java

@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2019 Warkdev
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package eu.jangos.extractor.di;
+
+import dagger.Module;
+import dagger.Provides;
+import eu.jangos.extractor.file.mpq.MPQManager;
+import javax.inject.Singleton;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ *
+ * @author Warkdev
+ */
+@Module
+public class ExtractorModule {
+    
+    private static final Logger logger = LoggerFactory.getLogger(ExtractorModule.class);
+    
+    private final String directory;
+    
+    public ExtractorModule(String directory) {
+        this.directory = directory;
+    }
+        
+    @Provides
+    @Singleton
+    public MPQManager provideMPQManager() {
+        try {
+            return new MPQManager(this.directory);
+        } catch (Exception e) {
+            logger.error("Error while generating MPQManager");
+        }
+        
+        return null;
+    }
+    
+}

src/main/java/module-info.java

@@ -25,7 +25,9 @@
     requires static javafx.controls;            
     requires static systems.crigges.jmpq;
     requires static javafx.swing;
-              
+    requires static dagger;
+    requires static javax.inject;
+    
     exports eu.jangos.extractor.file;
     exports eu.jangos.extractor.file.exception;
     exports eu.jangos.extractor.file.impl;