Examples of java.io.Reader.ready()

java.io.Reader.ready()
Answers a boolean indicating whether or not this Reader is ready to be read without blocking. If the result is true, the next read() will not block. If the result is false this Reader may or may not block when read() is sent. @return true if the receiver will not block whenread() is called, false if unknown or blocking will occur. @throws IOException If the Reader is already closed or some other IO error occurs.


    // -----------------------------------------------------------------------
    public void testAsReader() throws Exception {
        StrBuilder sb = new StrBuilder("some text");
        Reader reader = sb.asReader();
        assertEquals(true, reader.ready());
        char[] buf = new char[40];
        assertEquals(9, reader.read(buf));
        assertEquals("some text", new String(buf, 0, 9));
        
        assertEquals(-1, reader.read());

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        char[] buf = new char[40];
        assertEquals(9, reader.read(buf));
        assertEquals("some text", new String(buf, 0, 9));
        
        assertEquals(-1, reader.read());
        assertEquals(false, reader.ready());
        assertEquals(0, reader.skip(2));
        assertEquals(0, reader.skip(-1));
        
        assertEquals(true, reader.markSupported());
        reader = sb.asReader();

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        assertEquals('o', array[1]);
        assertEquals('e', array[2]);
        assertEquals(2, reader.skip(2));
        assertEquals(' ', reader.read());
        
        assertEquals(true, reader.ready());
        reader.close();
        assertEquals(true, reader.ready());
        
        reader = sb.asReader();
        array = new char[3];

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        assertEquals(2, reader.skip(2));
        assertEquals(' ', reader.read());
        
        assertEquals(true, reader.ready());
        reader.close();
        assertEquals(true, reader.ready());
        
        reader = sb.asReader();
        array = new char[3];
        try {
            reader.read(array, -1, 0);

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      fail("IOException expected.");
    } catch (IOException ioe) {
      // expected
    }
    try {
      boolean ready = reader.ready();
      fail("IOException expected.");
    } catch (IOException ioe) {
      // expected
    }
    reader.close();

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  @Test
  public void testMarkReset() throws IOException {
    Reader reader = new ReusableStringReader();
    if (reader.markSupported()) {
      ((ReusableStringReader)reader).set(fox);
      assertTrue(reader.ready());
      
      char[] cc = new char[6];
      int read;
      read = reader.read(cc);
      assertEquals(6, read);

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            reportedSize = msg[i - 1].size;
            Reader r = p.retrieveMessage(i);
            assertNotNull(r);


            int delaycount = 0;
            if (!r.ready())
            {
                //Give the reader time to get the message
                //from the server
                Thread.sleep(500);
                delaycount++;

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                if (delaycount == 4)
                {
                    break;
                }
            }
            while(r.ready())
            {
                r.read();
                actualSize++;
            }
            //Due to variations in line termination

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        //Now try to retrieve more lines than exist in the message
        Reader r = p.retrieveMessageTop(1, 100000);
        assertNotNull(r);


        int delaycount = 0;
        while(!r.ready())
        {
            //Give the reader time to get the message
            //from the server
            Thread.sleep(500);
            delaycount++;

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            if (delaycount == 4)
            {
                break;
            }
        }
        while(r.ready())
        {
            r.read();
            actualSize++;
        }
        //Due to variations in line termination

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