Merge pull request #445 from scijava/file-path-conversion

Add converters for File <-> Path conversion

Author: ctrueden

src/main/java/org/scijava/convert/FileToPathConverter.java

@@ -0,0 +1,33 @@
+
+package org.scijava.convert;
+
+import java.io.File;
+import java.nio.file.Path;
+
+import org.scijava.plugin.Plugin;
+
+/**
+ * A {@link Converter} used to convert {@link File}s into {@link Path}s.
+ * 
+ * @author Gabriel Selzer
+ */
+@Plugin(type = Converter.class)
+public class FileToPathConverter extends AbstractConverter<File, Path> {
+
+	@SuppressWarnings("unchecked")
+	@Override
+	public <T> T convert(Object src, Class<T> dest) {
+		File f = (File) src;
+		return (T) f.toPath();
+	}
+
+	@Override
+	public Class<Path> getOutputType() {
+		return Path.class;
+	}
+
+	@Override
+	public Class<File> getInputType() {
+		return File.class;
+	}
+}

src/main/java/org/scijava/convert/PathToFileConverter.java

@@ -0,0 +1,33 @@
+
+package org.scijava.convert;
+
+import java.io.File;
+import java.nio.file.Path;
+
+import org.scijava.plugin.Plugin;
+
+/**
+ * A {@link Converter} used to convert {@link Path}s into {@link File}s.
+ * 
+ * @author Gabriel Selzer
+ */
+@Plugin(type = Converter.class)
+public class PathToFileConverter extends AbstractConverter<Path, File> {
+
+	@SuppressWarnings("unchecked")
+	@Override
+	public <T> T convert(Object src, Class<T> dest) {
+		Path p = (Path) src;
+		return (T) p.toFile();
+	}
+
+	@Override
+	public Class<File> getOutputType() {
+		return File.class;
+	}
+
+	@Override
+	public Class<Path> getInputType() {
+		return Path.class;
+	}
+}

src/test/java/org/scijava/convert/FileToPathConversionTest.java

@@ -0,0 +1,57 @@
+
+package org.scijava.convert;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import java.io.File;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.scijava.Context;
+import org.scijava.parse.ParseService;
+
+/**
+ * Tests conversion between {@link File}s and {@link Path}s.
+ * 
+ * @author Gabriel Selzer
+ */
+public class FileToPathConversionTest {
+
+	private ConvertService convertService;
+	private Context context;
+
+	@Before
+	public void setUp() {
+		context = new Context(ParseService.class, ConvertService.class);
+		convertService = context.getService(ConvertService.class);
+	}
+
+	@After
+	public void tearDown() {
+		context.dispose();
+	}
+
+	/**
+	 * Tests the ability of to convert from {@link File} to {@link Path}.
+	 */
+	@Test
+	public void fileToPathConversion() {
+		File f = new File("tmp.java");
+		assertTrue(convertService.supports(f, Path.class));
+		Path p = convertService.convert(f, Path.class);
+		assertEquals(f.toPath(), p);
+	}
+
+	@Test
+	public void pathToFileConversion() {
+		Path p = Paths.get("tmp.java");
+		assertTrue(convertService.supports(p, File.class));
+		File f = convertService.convert(p, File.class);
+		assertEquals(f.toPath(), p);
+	}
+
+}