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.


            Reader r = pop.retrieveMessage(1);
            assertEquals(POP3.TRANSACTION_STATE, pop.getState());


            //Add some sleep here to handle network latency
            while(!r.ready())
            {
                Thread.sleep(10);
            }
            r.close();
            r = null;

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            r = pop.retrieveMessageTop(1, 10);
            assertEquals(POP3.TRANSACTION_STATE, pop.getState());


            //Add some sleep here to handle network latency
            while(!r.ready())
            {
                Thread.sleep(10);
            }
            r.close();
            r = null;

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        this.fins = new FileInputStream(tmpFile);
        // channel null
        Reader testReader = Channels.newReader(null, Charset.forName(CODE_SET)
                .newDecoder(), -1);
        assertNotNull(testReader);
        assertFalse(testReader.ready());
        try {
            readres = testReader.read((CharBuffer) null);
            fail();
        } catch (NullPointerException e) {
            // correct

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        // channel with null inputs
        testReader = Channels.newReader(rbChannel, Charset.forName(CODE_SET)
                .newDecoder(), //$NON-NLS-1$
                -1);
        assertNotNull(testReader);
        assertFalse(testReader.ready());
        try {
            readres = testReader.read(charBuf);
            fail();
        } catch (NullPointerException e) {
            // correct

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        // channel null
        Reader testReader = Channels.newReader(null, Charset.forName(CODE_SET)
                .newDecoder(), //$NON-NLS-1$
                0);
        assertNotNull(testReader);
        assertFalse(testReader.ready());
        try {
            readres = testReader.read((CharBuffer) null);
            fail();
        } catch (NullPointerException e) {
            // correct

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        // channel with null inputs
        testReader = Channels.newReader(rbChannel, Charset.forName(CODE_SET)
                .newDecoder(), //$NON-NLS-1$
                -1);
        assertNotNull(testReader);
        assertFalse(testReader.ready());
        try {
            readres = testReader.read(charBuf);
            fail();
        } catch (NullPointerException e) {
            // correct

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        Reader testReader_s = Channels.newReader(rbChannel, CODE_SET); //$NON-NLS-1$


        assertEquals(this.fileSize, this.fins.available());
        // not ready...
        assertFalse(testReader.ready());
        assertFalse(testReader_s.ready());
        // still reads
        readres = testReader.read(charBuf);
        assertEquals(bufSize, readres);
        assertEquals(0, this.fins.available());

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        }


        readres = testReader_s.read(charBuf);
        assertEquals(0, readres);
        assertTrue(testReader.ready());
        assertFalse(testReader_s.ready());
    }


    /*
     * Zero-Buffer
     */

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        Reader reader = serialClob.getCharacterStream();
        char[] data = new char[buf.length];
        int read = reader.read(data);
        assertEquals(buf.length, read);
        assertTrue(Arrays.equals(buf, data));
        assertFalse(reader.ready());


        MockSerialClob mockClob = new MockSerialClob();
        mockClob.characterStreamReader = new CharArrayReader(mockClob.buf);
        mockClob.asciiInputStream = new ByteArrayInputStream(new byte[] { 1 });
        mockClob.asciiOutputStream = new ByteArrayOutputStream();

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        reader = serialClob.getCharacterStream();
        data = new char[mockClob.buf.length];
        read = reader.read(data);
        assertEquals(mockClob.buf.length, read);
        assertTrue(Arrays.equals(mockClob.buf, data));
        assertFalse(reader.ready());
    }


    public void testGetSubString() throws Exception {
        SerialClob serialClob = new SerialClob("hello".toCharArray());

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