Decomposed & refined Parser.java

java/read/AsciiOnlyFileContents.java

@@ -0,0 +1,17 @@
+package read;
+
+import java.util.Objects;
+
+public class AsciiOnlyFileContents implements FileContents {
+
+    private final FileContents original;
+
+    public AsciiOnlyFileContents(final FileContents original) {
+        this.original = Objects.requireNonNull(original);
+    }
+
+    @Override
+    public String asString() {
+        return this.original.asString().replaceAll("[^\\u0000-\\u007F]+", "");
+    }
+}

java/read/ConcreteFileContents.java

@@ -0,0 +1,37 @@
+package read;
+
+import java.io.*;
+import java.nio.file.Path;
+import java.util.Iterator;
+import java.util.Objects;
+
+public class ConcreteFileContents implements FileContents {
+
+    private final File file;
+
+    public ConcreteFileContents(final Path path) {
+        this(path.toFile());
+    }
+
+    public ConcreteFileContents(final String file) {
+        this(new File(file));
+    }
+
+    public ConcreteFileContents(final File file) {
+        this.file = Objects.requireNonNull(file);
+    }
+
+    @Override
+    public String asString() {
+        final StringBuilder result = new StringBuilder();
+        try (final BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(this.file)))) {
+            final Iterator<String> lines = reader.lines().iterator();
+            while (lines.hasNext()) {
+                result.append(lines.next());
+            }
+        } catch (IOException e) {
+            throw new UncheckedIOException(e);
+        }
+        return result.toString();
+    }
+}

java/read/FileContents.java

@@ -0,0 +1,6 @@
+package read;
+
+public interface FileContents {
+
+    String asString();
+}

java/write/WriteStringToFile.java

@@ -0,0 +1,36 @@
+package write;
+
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.io.UncheckedIOException;
+import java.nio.file.Path;
+import java.util.Objects;
+
+public class WriteStringToFile implements WriteToFile {
+
+    private final File file;
+    private final String value;
+
+    public WriteStringToFile(final Path path, final String value) {
+        this(path.toFile(), value);
+    }
+
+    public WriteStringToFile(final String file, final String value) {
+        this(new File(file), value);
+    }
+
+    public WriteStringToFile(final File file, final String value) {
+        this.file = Objects.requireNonNull(file);
+        this.value = Objects.requireNonNull(value);
+    }
+
+    @Override
+    public void write() {
+        try (final FileWriter fileWriter = new FileWriter(this.file)) {
+            fileWriter.write(this.value);
+        } catch (IOException e) {
+            throw new UncheckedIOException(e);
+        }
+    }
+}

java/write/WriteToFile.java

@@ -0,0 +1,7 @@
+package write;
+
+public interface WriteToFile {
+
+    void write();
+
+}