ONLY Fast-Path

Author: mkarg

src/java.base/share/classes/java/io/InputStreamReader.java

@@ -183,6 +183,11 @@ public int read(char[] cbuf, int off, int len) throws IOException {
         return sd.read(cbuf, off, len);
     }
 
+    @Override
+    public String readAllAsString() throws IOException {
+        return sd.readAllAsString();
+    }
+
     /**
      * Tells whether this stream is ready to be read.  An InputStreamReader is
      * ready if its input buffer is not empty, or if bytes are available to be

src/java.base/share/classes/sun/nio/cs/StreamDecoder.java

@@ -49,6 +49,7 @@ public class StreamDecoder extends Reader {
     private static final int MIN_BYTE_BUFFER_SIZE = 32;
     private static final int DEFAULT_BYTE_BUFFER_SIZE = 8192;
 
+    private volatile boolean opened;
     private volatile boolean closed;
 
     private void ensureOpen() throws IOException {
@@ -116,6 +117,7 @@ public String getEncoding() {
     }
 
     public int read() throws IOException {
+        opened = true;
         return read0();
     }
 
@@ -149,6 +151,7 @@ private int read0() throws IOException {
 
     public int read(char[] cbuf, int offset, int length) throws IOException {
         synchronized (lock) {
+            opened = true;
             int off = offset;
             int len = length;
 
@@ -192,6 +195,21 @@ public int read(char[] cbuf, int offset, int length) throws IOException {
         }
     }
 
+    @Override
+    public String readAllAsString() throws IOException {
+        synchronized (lock) {
+            ensureOpen();
+            final String s = (in == null || opened) ? super.readAllAsString() : new String(in.readAllBytes(), cs);
+            opened = true;
+            return s;
+        }
+    }
+/*
+    @Override
+    public String readAllAsString() throws IOException {
+        throw new RuntimeException();
+    }
+*/
     public boolean ready() throws IOException {
         synchronized (lock) {
             ensureOpen();