Added restriction such that only non-directory files can be compressed

to xz format (due to xz specification). Updated maven plugins.

pom.xml

@@ -2,9 +2,10 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.dscalzi</groupId>
   <artifactId>ZipExtractor</artifactId>
-  <version>1.2.1</version>
+  <version>1.2.0</version>
   <name>Zip Extractor</name>
   <description>Utility plugin to extract archives and compress files.</description>
+  <url>https://github.com/dscalzi/ZipExtractor</url>
 
   <properties>
   	<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
@@ -30,8 +31,9 @@
     </resources>
     <plugins>
       <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-compiler-plugin</artifactId>
-        <version>3.5.1</version>
+        <version>3.7.0</version>
         <configuration>
           <source>1.8</source>
           <target>1.8</target>
@@ -41,7 +43,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-shade-plugin</artifactId>
-        <version>2.4.3</version>
+        <version>3.1.0</version>
         <executions>
           <execution>
             <phase>package</phase>
@@ -50,7 +52,7 @@
             </goals>
             <configuration>
               <minimizeJar>true</minimizeJar>
-              <finalName>ZipExtractor</finalName>
+              <finalName>ZipExtractor-${version}</finalName>
               <relocations>
               	<relocation>
               		<pattern>org.bstats</pattern>
@@ -135,4 +137,5 @@
     	</exclusions>
 	</dependency>
   </dependencies>
+
 </project>

src/main/java/com/dscalzi/zipextractor/providers/XZProvider.java

@@ -30,7 +30,8 @@ public class XZProvider implements TypeProvider {
 
 	//Shared pattern by ZipProviders
 	public static final Pattern PATH_END = Pattern.compile("\\.xz$");
-	public static final List<String> SUPPORTED = new ArrayList<String>(Arrays.asList("xz"));
+	public static final List<String> SUPPORTED_EXTRACT = new ArrayList<String>(Arrays.asList("xz"));
+	public static final List<String> SUPPORTED_COMPRESS = new ArrayList<String>(Arrays.asList("non-directory"));
 
 	@Override
 	public List<String> scanForExtractionConflicts(CommandSender sender, File src, File dest) {
@@ -48,7 +49,7 @@ public List<String> scanForExtractionConflicts(CommandSender sender, File src, F
 	public void extract(CommandSender sender, File src, File dest) {
 		final ConfigManager cm = ConfigManager.getInstance();
 		final MessageManager mm = MessageManager.getInstance();
-		final Logger logger = MessageManager.getInstance().getLogger();
+		final Logger logger = mm.getLogger();
 		final boolean log = cm.getLoggingProperty();
 		mm.startingProcess(sender, ZTask.EXTRACT, src.getName());
 		File realDest = new File(dest.getAbsolutePath(), PATH_END.matcher(src.getName()).replaceAll(""));
@@ -76,7 +77,7 @@ public void extract(CommandSender sender, File src, File dest) {
 	public void compress(CommandSender sender, File src, File dest) {
 		final ConfigManager cm = ConfigManager.getInstance();
 		final MessageManager mm = MessageManager.getInstance();
-		final Logger logger = MessageManager.getInstance().getLogger();
+		final Logger logger = mm.getLogger();
 		final boolean log = cm.getLoggingProperty();
 		mm.startingProcess(sender, ZTask.COMPRESS, src.getName());
 		try(FileOutputStream fos = new FileOutputStream(dest);
@@ -97,7 +98,7 @@ public boolean validForExtraction(File src) {
 
 	@Override
 	public boolean srcValidForCompression(File src) {
-		return true; //Any source file can be compressed to .xz.
+		return !src.isDirectory();
 	}
 
 	@Override
@@ -107,12 +108,17 @@ public boolean destValidForCompression(File dest) {
 
 	@Override
 	public List<String> supportedExtractionTypes() {
-		return SUPPORTED;
+		return SUPPORTED_EXTRACT;
 	}
 
 	@Override
 	public List<String> canCompressTo() {
-		return SUPPORTED;
+		return SUPPORTED_EXTRACT;
+	}
+
+	@Override
+	public List<String> canCompressFrom() {
+		return SUPPORTED_COMPRESS;
 	}
 
 }

src/main/resources/plugin.yml

@@ -2,7 +2,7 @@ author: Daniel Scalzi
 description: Utility plugin to extract archives and compress files.
 main: com.dscalzi.zipextractor.ZipExtractor
 name: ZipExtractor
-version: 1.2.1
+version: 1.2.0
 commands:
     zipextractor:
         description: Accesses plugin commands.