enable text encoding

hogelog · Mar 1, 2013 · 5eda509 · 5eda509
1 parent 42ca6c1
commit 5eda509
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Showing 4 changed files with 223 additions and 70 deletions.
diff --git a/pom.xml b/pom.xml
@@ -24,11 +24,30 @@
       <version>1.0.9</version>
     </dependency>
 
+    <dependency>
+      <groupId>com.google.guava</groupId>
+      <artifactId>guava</artifactId>
+      <version>14.0</version>
+    </dependency>
+
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
       <version>4.10</version>
       <scope>test</scope>
     </dependency>
   </dependencies>
+
+  <build>
+	<plugins>
+		<plugin>
+			<groupId>org.apache.maven.plugins</groupId>
+			<artifactId>maven-compiler-plugin</artifactId>
+			<configuration>
+				<source>1.7</source>
+				<target>1.7</target>
+			</configuration>
+		</plugin>
+  	</plugins>
+  </build>
 </project>
diff --git a/src/main/java/org/hogel/Encoder.java b/src/main/java/org/hogel/Encoder.java
@@ -1,5 +1,37 @@
 package org.hogel;
 
+import java.nio.ByteBuffer;
+import java.nio.CharBuffer;
+import java.nio.charset.CharacterCodingException;
+import java.nio.charset.Charset;
+import java.nio.charset.CharsetDecoder;
+
 public class Encoder {
+    public static final Charset SJIS = Charset.forName("SJIS");
+    public static final Charset UTF8 = Charset.forName("UTF-8");
+
+    private static final Charset[] CANDIDATE_ENCODINGS = {
+        SJIS, UTF8
+    };
+
+    private final Charset target;
+
+    public Encoder(Charset target) {
+        this.target = target;
+    }
+
+    public byte[] encode(byte[] data) {
+        final ByteBuffer dataBuffer = ByteBuffer.wrap(data);
+        for (final Charset candidate : CANDIDATE_ENCODINGS) {
+            final CharsetDecoder decoder = candidate.newDecoder();
+            try {
+                dataBuffer.position(0);
+                final CharBuffer decoded = decoder.decode(dataBuffer);
+                return decoded.toString().getBytes(target);
+            } catch (final CharacterCodingException e) {
+            }
+        }
+        throw new IllegalArgumentException("unknown encoding");
+    }
 
 }
diff --git a/src/main/java/org/hogel/MainWindow.java b/src/main/java/org/hogel/MainWindow.java
@@ -1,84 +1,143 @@
 package org.hogel;
 
+import java.awt.BorderLayout;
 import java.awt.EventQueue;
+import java.awt.datatransfer.DataFlavor;
+import java.awt.datatransfer.Transferable;
+import java.awt.datatransfer.UnsupportedFlavorException;
+import java.io.File;
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.List;
 
 import javax.swing.JFrame;
-import javax.swing.JTextArea;
-import javax.swing.UIManager;
-
-import java.awt.BorderLayout;
 import javax.swing.JPanel;
+import javax.swing.JScrollPane;
 import javax.swing.JTabbedPane;
+import javax.swing.JTable;
+import javax.swing.JTextArea;
+import javax.swing.TransferHandler;
+import javax.swing.UIManager;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import javax.swing.JScrollPane;
-import javax.swing.JTable;
+
+import com.google.common.io.Files;
 
 public class MainWindow {
-
-	private static final Logger LOG = LoggerFactory.getLogger(MainWindow.class);
-
-	private JFrame frame;
-
-	private JTextArea logTextArea;
-
-	private JTable replaceTable;
-
-	/**
-	 * Launch the application.
-	 */
-	public static void main(String[] args) {
-		EventQueue.invokeLater(new Runnable() {
-			public void run() {
-				try {
-					UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
-					MainWindow window = new MainWindow();
-					window.frame.setVisible(true);
-				} catch (Exception e) {
-					LOG.error(e.getMessage(), e);
-				}
-			}
-		});
-	}
-
-	/**
-	 * Create the application.
-	 */
-	public MainWindow() {
-		initialize();
-	}
-
-	/**
-	 * Initialize the contents of the frame.
-	 */
-	private void initialize() {
-		frame = new JFrame();
-		frame.setBounds(100, 100, 450, 300);
-		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
-		frame.getContentPane().setLayout(new BorderLayout(0, 0));
-
-		JTabbedPane tabbedPane = new JTabbedPane(JTabbedPane.TOP);
-		frame.getContentPane().add(tabbedPane, BorderLayout.CENTER);
-
-		JPanel logPanel = new JPanel();
-		logPanel.setToolTipText("");
-		tabbedPane.addTab("変換ログ", null, logPanel, null);
-		logPanel.setLayout(new BorderLayout(0, 0));
-
-		logTextArea = new JTextArea();
-		logPanel.add(logTextArea);
-		logTextArea.setEditable(false);
-
-		JPanel settingPanel = new JPanel();
-		tabbedPane.addTab("設定", null, settingPanel, null);
-		settingPanel.setLayout(new BorderLayout(0, 0));
-
-		replaceTable = new JTable();
-		settingPanel.add(replaceTable, BorderLayout.CENTER);
-
-		JScrollPane scrollPane = new JScrollPane();
-		settingPanel.add(scrollPane, BorderLayout.EAST);
-	}
+
+    private static final Logger LOG = LoggerFactory.getLogger(MainWindow.class);
+
+    private JFrame frame;
+
+    private JTextArea logTextArea;
+
+    private JTable replaceTable;
+
+    /**
+     * Launch the application.
+     */
+    public static void main(String[] args) {
+        EventQueue.invokeLater(new Runnable() {
+            @Override
+            public void run() {
+                try {
+                    UIManager.setLookAndFeel(UIManager
+                            .getSystemLookAndFeelClassName());
+                    final MainWindow window = new MainWindow();
+                    window.frame.setVisible(true);
+                } catch (final Exception e) {
+                    LOG.error(e.getMessage(), e);
+                }
+            }
+        });
+    }
+
+    /**
+     * Create the application.
+     */
+    public MainWindow() {
+        initialize();
+    }
+
+    /**
+     * Initialize the contents of the frame.
+     */
+    private void initialize() {
+        frame = new JFrame();
+        frame.setBounds(100, 100, 450, 300);
+        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        frame.getContentPane().setLayout(new BorderLayout(0, 0));
+
+        final JTabbedPane tabbedPane = new JTabbedPane(JTabbedPane.TOP);
+        frame.getContentPane().add(tabbedPane, BorderLayout.CENTER);
+
+        final JPanel logPanel = new JPanel();
+        logPanel.setToolTipText("");
+        tabbedPane.addTab("変換ログ", null, logPanel, null);
+        logPanel.setLayout(new BorderLayout(0, 0));
+
+        logTextArea = new JTextArea();
+        logPanel.add(logTextArea);
+        logTextArea.setEditable(false);
+
+        final JPanel settingPanel = new JPanel();
+        tabbedPane.addTab("設定", null, settingPanel, null);
+        settingPanel.setLayout(new BorderLayout(0, 0));
+
+        replaceTable = new JTable();
+        replaceTable.setAutoResizeMode(JTable.AUTO_RESIZE_ALL_COLUMNS);
+        settingPanel.add(replaceTable, BorderLayout.CENTER);
+
+        final JScrollPane scrollPane = new JScrollPane();
+        settingPanel.add(scrollPane, BorderLayout.EAST);
+
+        final TransferHandler dropHandler = new TransferHandler() {
+            @Override
+            public boolean importData(TransferSupport support) {
+                final Transferable transferable = support.getTransferable();
+                try {
+                    @SuppressWarnings("unchecked")
+                    final
+                    List<File> files = (List<File>) transferable
+                            .getTransferData(DataFlavor.javaFileListFlavor);
+                    for (final File file : files) {
+                        encodeFile(file);
+                    }
+                } catch (UnsupportedFlavorException | IOException e) {
+                    e.printStackTrace();
+                    return false;
+                }
+                return true;
+            }
+
+            @Override
+            public boolean canImport(TransferSupport support) {
+                return true;
+            }
+
+            private static final long serialVersionUID = 1L;
+        };
+        frame.setTransferHandler(dropHandler);
+        logTextArea.setTransferHandler(dropHandler);
+        replaceTable.setTransferHandler(dropHandler);
+    }
+
+    private final Encoder sjisencoder = new Encoder(Encoder.SJIS);
+    private void encodeFile(File file) throws IOException {
+        final byte[] readData = Files.toByteArray(file);
+        final byte[] writeData = sjisencoder.encode(readData);
+        if (Arrays.equals(readData, writeData)) {
+            log(String.format("%s は既にShift-JISです。\n", file.getPath()));
+        } else {
+            Files.write(writeData, file);
+            log(String.format("%s をShift-JISに変換しました。\n", file.getPath()));
+        }
+    }
+
+    private void log(String text) {
+        System.err.print(text);
+        logTextArea.setText(logTextArea.getText() + text);
+    }
 
 }
diff --git a/src/test/java/org/hogel/EncoderTest.java b/src/test/java/org/hogel/EncoderTest.java
@@ -0,0 +1,43 @@
+package org.hogel;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.junit.Assert.assertThat;
+import static org.junit.Assert.assertTrue;
+
+import java.nio.charset.Charset;
+
+import org.junit.Test;
+
+public class EncoderTest {
+    Charset UTF8 = Charset.forName("UTF-8");
+    Charset SJIS = Charset.forName("SJIS");
+
+    String text = "日本語日本語";
+
+    @Test
+    public void sjis_to_utf8() {
+        final byte[] sjis = text.getBytes(SJIS);
+        final byte[] utf8 = text.getBytes(UTF8);
+        final Encoder encoder = new Encoder(UTF8);
+        final byte[] encoded = encoder.encode(sjis);
+        assertThat(encoded, is(utf8));
+    }
+
+    @Test
+    public void utf8_to_utf8() {
+        final byte[] utf8 = text.getBytes(UTF8);
+        final Encoder encoder = new Encoder(UTF8);
+        final byte[] encoded = encoder.encode(utf8);
+        assertThat(encoded, is(utf8));
+    }
+    @Test
+    public void error() throws Exception {
+        final byte[] eucjp = text.getBytes("EUC-JP");
+        final Encoder encoder = new Encoder(UTF8);
+        try {
+            encoder.encode(eucjp);
+            assertTrue(false);
+        } catch (final Exception e) {
+        }
+    }
+}