Add AbstractByteArrayOutputStream.write(CharSequence, Charset)

- Add AbstractByteArrayOutputStream.write(byte[])
- Refactor and update ByteArrayOutputStreamTest

src/changes/changes.xml

@@ -54,6 +54,8 @@ The <action> type attribute can be add,update,fix,remove.
       <action dev="ggregory" type="add" issue="IO-860" due-to="Nico Strecker, Gary Gregory">Add ThrottledInputStream.Builder.setMaxBytes(long, ChronoUnit).</action>
       <action dev="ggregory" type="add"                due-to="Gary Gregory">Add IOIterable.</action>
       <action dev="ggregory" type="add"                due-to="Gary Gregory">ReversedLinesFileReader implements IOIterable&lt;String&gt;.</action>
+      <action dev="ggregory" type="add"                due-to="Gary Gregory">Add AbstractByteArrayOutputStream.write(CharSequence, Charset).</action>
+      <action dev="ggregory" type="add"                due-to="Gary Gregory">Add AbstractByteArrayOutputStream.write(byte[]).</action>
       <!-- UPDATE -->
     </release>
     <release version="2.18.0" date="2024-11-16" description="Version 2.18.0: Java 8 is required.">

src/main/java/org/apache/commons/io/output/AbstractByteArrayOutputStream.java

@@ -28,6 +28,7 @@
 import java.util.Collections;
 import java.util.List;
 
+import org.apache.commons.io.Charsets;
 import org.apache.commons.io.IOUtils;
 import org.apache.commons.io.input.ClosedInputStream;
 
@@ -55,9 +56,10 @@
  * ignored.
  * </p>
  *
+ * @param <T> The AbstractByteArrayOutputStream subclass
  * @since 2.7
  */
-public abstract class AbstractByteArrayOutputStream extends OutputStream {
+public abstract class AbstractByteArrayOutputStream<T extends AbstractByteArrayOutputStream<T>> extends OutputStream {
 
     /**
      * Constructor for an InputStream subclass.
@@ -83,18 +85,18 @@ protected interface InputStreamConstructor<T extends InputStream> {
     /** The list of buffers, which grows and never reduces. */
     private final List<byte[]> buffers = new ArrayList<>();
 
+    /** The total count of bytes written. */
+    protected int count;
+
+    /** The current buffer. */
+    private byte[] currentBuffer;
+
     /** The index of the current buffer. */
     private int currentBufferIndex;
 
     /** The total count of bytes in all the filled buffers. */
     private int filledBufferSum;
 
-    /** The current buffer. */
-    private byte[] currentBuffer;
-
-    /** The total count of bytes written. */
-    protected int count;
-
     /** Flag to indicate if the buffers can be reused after reset */
     private boolean reuseBuffers = true;
 
@@ -105,6 +107,16 @@ public AbstractByteArrayOutputStream() {
         // empty
     }
 
+    /*
+     * Returns this instance typed to {@code T}.
+     *
+     * @return this instance
+     */
+    @SuppressWarnings("unchecked")
+    protected T asThis() {
+        return (T) this;
+    }
+
     /**
      * Does nothing.
      *
@@ -304,9 +316,34 @@ public String toString(final String enc) throws UnsupportedEncodingException {
         return new String(toByteArray(), enc);
     }
 
+    /**
+     * Writes {@code b.length} bytes from the given byte array to this output stream. This has same effect as {@code write(b, 0, b.length)}.
+     *
+     * @param b the data.
+     * @see #write(byte[], int, int)
+     * @since 2.19.0
+     */
+    @Override
+    public void write(final byte b[]) {
+        write(b, 0, b.length);
+    }
+
     @Override
     public abstract void write(final byte[] b, final int off, final int len);
 
+    /**
+     * Writes the bytes for given CharSequence encoded using a Charset.
+     *
+     * @param data    The String to convert to bytes. not null.
+     * @param charset The {@link Charset} o encode the {@code String}, null means the default encoding.
+     * @return this instance.
+     * @since 2.19.0
+     */
+    public T write(final CharSequence data, final Charset charset) {
+        write(data.toString().getBytes(Charsets.toCharset(charset)));
+        return asThis();
+    }
+
     /**
      * Writes the entire contents of the specified input stream to this
      * byte stream. Bytes from the input stream are read directly into the

src/main/java/org/apache/commons/io/output/ByteArrayOutputStream.java

@@ -25,7 +25,7 @@
  * Implements a ThreadSafe version of {@link AbstractByteArrayOutputStream} using instance synchronization.
  */
 //@ThreadSafe
-public class ByteArrayOutputStream extends AbstractByteArrayOutputStream {
+public class ByteArrayOutputStream extends AbstractByteArrayOutputStream<ByteArrayOutputStream> {
 
     /**
      * Fetches entire contents of an {@link InputStream} and represent

src/main/java/org/apache/commons/io/output/UnsynchronizedByteArrayOutputStream.java

@@ -36,7 +36,7 @@
  * @since 2.7
  */
 //@NotThreadSafe
-public final class UnsynchronizedByteArrayOutputStream extends AbstractByteArrayOutputStream {
+public final class UnsynchronizedByteArrayOutputStream extends AbstractByteArrayOutputStream<UnsynchronizedByteArrayOutputStream> {
 
     // @formatter:off
     /**