improved file writing by outsourcing String reading and including "Reader"s

FabianUtil.java

@@ -1,10 +1,10 @@
 package FIXME;
 
-import java.io.IOException;
+import java.io.*;
 import java.math.BigDecimal;
 import java.math.MathContext;
-import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
+import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.text.DecimalFormat;
 import java.time.Duration;
@@ -15,6 +15,7 @@ import java.util.concurrent.TimeUnit;
 public class FabianUtil {
 
    private static final String STD_DIR_TEMP = "/FIXME/temp/";
+   private static final String TEST_OUTPUT_DIR = "testOutput/";
    public static final String ENDING_TXT = "txt";
    public static final String ENDING_JSON = "json";
    public static final String ENDING_HTML = "html";
@@ -224,22 +225,27 @@ public class FabianUtil {
 
 
    public static void writeTestOutput(String filename, String ending, String content) {
-      writeTestOutput(filename, ending, strToBytes(content));
+      writeToFile(STD_DIR_TEMP + TEST_OUTPUT_DIR, filename, ending, content);
-   }
-
-
-   public static byte[] strToBytes(String str) {
-      return str.getBytes(StandardCharsets.UTF_8);
    }
 
 
    public static void writeTestOutput(String filename, String ending, byte[] content) {
-      writeToFile(STD_DIR_TEMP + "testOutput/", filename, ending, content);
+      writeToFile(STD_DIR_TEMP + TEST_OUTPUT_DIR, filename, ending, content);
+   }
+
+
+   public static void writeTestOutput(String filename, String ending, InputStream content) {
+      writeToFile(STD_DIR_TEMP + TEST_OUTPUT_DIR, filename, ending, content);
+   }
+
+
+   public static void writeTestOutput(String filename, String ending, Reader content) {
+      writeToFile(STD_DIR_TEMP + TEST_OUTPUT_DIR, filename, ending, content);
    }
 
 
    public static void writeDump(String ending, String content) {
-      writeDump(ending, strToBytes(content));
+      writeToFile(STD_DIR_TEMP, "dump", ending, content);
    }
 
 
@@ -248,8 +254,18 @@ public class FabianUtil {
    }
 
 
+   public static void writeDump(String ending, InputStream content) {
+      writeToFile(STD_DIR_TEMP, "dump", ending, content);
+   }
+
+
+   public static void writeDump(String ending, Reader content) {
+      writeToFile(STD_DIR_TEMP, "dump", ending, content);
+   }
+
+
    public static void writeDump(String filename, String ending, String content) {
-      writeDump(filename, ending, strToBytes(content));
+      writeToFile(STD_DIR_TEMP, filename, ending, content);
    }
 
 
@@ -258,9 +274,45 @@ public class FabianUtil {
    }
 
 
+   public static void writeDump(String filename, String ending, InputStream content) {
+      writeToFile(STD_DIR_TEMP, filename, ending, content);
+   }
+
+
+   public static void writeDump(String filename, String ending, Reader content) {
+      writeToFile(STD_DIR_TEMP, filename, ending, content);
+   }
+
+
+   public static void writeToFile(String path, String filename, String ending, String content) {
+      writeToFile(path, filename, ending, new StringReader(content));
+   }
+
+
    public static void writeToFile(String path, String filename, String ending, byte[] content) {
-      try {
+      writeToFile(path, filename, ending, new InputStreamReader(new ByteArrayInputStream(content)));
+   }
+
+
+   public static void writeToFile(String path, String filename, String ending, InputStream content) {
+      writeToFile(path, filename, ending, new InputStreamReader(content));
+   }
+
+
+   public static void writeToFile(String path, String filename, String ending, Reader content) {
+      Path toFile = Paths.get(path + filename + "." + ending);
+      try (content) {
+         BufferedWriter out = Files.newBufferedWriter(toFile);
+         content.transferTo(out);
+         /* varianten: selber pipen:
+         OutputStream out = Files.newOutputStream(Paths.get(path + filename + "." + ending));
+         content.transferTo(out);
+         oder mit reader/ writer:
+         BufferedWriter out = Files.newBufferedWriter(Paths.get(path + filename + "." + ending));
+         content.transferTo(out);
+         oder mit byte-array:
          Files.write(Paths.get(path + filename + "." + ending), content);
+         */
       } catch (IOException e) {
          throw new RuntimeException(e);
       }