Added PathOptionHandler for automatic parsing of Path objects in java 7

args4j/src/org/kohsuke/args4j/CmdLineParser.java

@@ -9,6 +9,7 @@
 import java.lang.reflect.InvocationTargetException;
 import java.net.URI;
 import java.net.URL;
+import java.nio.file.Path;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Comparator;
@@ -28,6 +29,7 @@
 import org.kohsuke.args4j.spi.DoubleOptionHandler;
 import org.kohsuke.args4j.spi.EnumOptionHandler;
 import org.kohsuke.args4j.spi.FileOptionHandler;
+import org.kohsuke.args4j.spi.PathOptionHandler;
 import org.kohsuke.args4j.spi.FloatOptionHandler;
 import org.kohsuke.args4j.spi.IntOptionHandler;
 import org.kohsuke.args4j.spi.LongOptionHandler;
@@ -551,6 +553,7 @@ private static Constructor<? extends OptionHandler> getConstructor(Class<? exten
         registerHandler(Boolean.class,BooleanOptionHandler.class);
         registerHandler(boolean.class,BooleanOptionHandler.class);
         registerHandler(File.class,FileOptionHandler.class);
+        registerHandler(Path.class, PathOptionHandler.class);
         registerHandler(URL.class, URLOptionHandler.class);
         registerHandler(URI.class, URIOptionHandler.class);
         registerHandler(Integer.class,IntOptionHandler.class);

args4j/src/org/kohsuke/args4j/spi/PathOptionHandler.java

@@ -0,0 +1,35 @@
+package org.kohsuke.args4j.spi;
+
+import org.kohsuke.args4j.CmdLineException;
+import org.kohsuke.args4j.CmdLineParser;
+import org.kohsuke.args4j.OptionDef;
+
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
+/**
+ * Created with IntelliJ IDEA.
+ * User: kmahoney
+ * Date: 6/6/13
+ * Time: 8:17 AM
+ */
+public class PathOptionHandler extends OneArgumentOptionHandler<Path> {
+    public PathOptionHandler(CmdLineParser parser, OptionDef option, Setter<? super Path> setter) {
+        super(parser, option, setter);
+    }
+
+    @Override
+    protected Path parse(String argument) throws NumberFormatException, CmdLineException {
+        try {
+        return Paths.get(argument);
+        }
+        catch (Exception e) {
+            throw new CmdLineException(owner, "Failed to Parse Path: " + argument, e);
+        }
+    }
+
+    @Override
+    public String getDefaultMetaVariable() {
+        return "PATH";
+    }
+}

args4j/test/org/kohsuke/args4j/spi/PathOptionHandlerTest.java

@@ -0,0 +1,54 @@
+package org.kohsuke.args4j.spi;
+
+import junit.framework.TestCase;
+import org.kohsuke.args4j.CmdLineException;
+
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
+/**
+ * Created with IntelliJ IDEA.
+ * User: kmahoney
+ * Date: 6/7/13
+ * Time: 6:09 AM
+ */
+
+public class PathOptionHandlerTest extends TestCase {
+    static final String TEST_1 = "/path/test";
+    static final String TEST_2 = "bad/path/\0";
+
+    private PathOptionHandler handler;
+
+    	@Override
+    	public void setUp() {
+    		handler = new PathOptionHandler(null, null, null);
+    	}
+
+    	public void testParseSuccess() throws Exception {
+    		Path expectedIp = Paths.get(TEST_1);
+    		Path ip = handler.parse(TEST_1);
+
+    		assertEquals(expectedIp, ip);
+    	}
+
+    	public void testParseFailure() throws Exception {
+    		try {
+    		    handler.parse(TEST_2);
+    		}
+            catch (CmdLineException e) {
+    			//assertEquals("\"a.b.c.d\" must be an IP address", e.getMessage());
+    			return;
+    		}
+    		fail("Invalid Path Should Have Thrown Exception");
+    	}
+    	public void testNullParseFailure() throws Exception {
+    		try {
+    		    handler.parse(null);
+    		}
+            catch (CmdLineException e) {
+    			//assertEquals("\"a.b.c.d\" must be an IP address", e.getMessage());
+    			return;
+    		}
+    		fail("Null Path Should Have Thrown Exception");
+    	}
+}