Package org.apache.mina.core.buffer

Examples of org.apache.mina.core.buffer.IoBuffer.position()

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    @Test
    public void testAllocate() throws Exception {
        for (int i = 10; i < 1048576 * 2; i = i * 11 / 10) // increase by 10%
        {
            IoBuffer buf = IoBuffer.allocate(i);
            assertEquals(0, buf.position());
            assertEquals(buf.capacity(), buf.remaining());
            assertTrue(buf.capacity() >= i);
            assertTrue(buf.capacity() < i * 2);
        }
    }
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            assertTrue(true);
        }

        buf.setAutoExpand(true);
        buf.put((byte) 0);
        assertEquals(2, buf.position());
        assertEquals(2, buf.limit());
        assertEquals(2, buf.capacity());

        buf.setAutoExpand(false);
        try {
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            assertTrue(true);
        }

        buf.setAutoExpand(true);
        buf.put(3, (byte) 0);
        assertEquals(2, buf.position());
        assertEquals(4, buf.limit());
        assertEquals(4, buf.capacity());

        // Make sure the buffer is doubled up.
        buf = IoBuffer.allocate(1).setAutoExpand(true);
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        // Overflow it
        buf.put((byte) 0);
        buf.put((byte) 0);

        assertEquals(5, buf.position());
        buf.reset();
        assertEquals(3, buf.position());
    }

    @Test
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        buf.put((byte) 0);
        buf.put((byte) 0);

        assertEquals(5, buf.position());
        buf.reset();
        assertEquals(3, buf.position());
    }

    @Test
    public void testAutoShrink() throws Exception {
        IoBuffer buf = IoBuffer.allocate(8).setAutoShrink(true);
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        // capacity.)
        buf.sweep((byte) 1);
        buf.fill(7);
        buf.compact();
        assertEquals(8, buf.capacity());
        assertEquals(1, buf.position());
        assertEquals(8, buf.limit());
        buf.clear();
        assertEquals(1, buf.get());

        // Expand the buffer.
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        // Make sure the buffer shrinks when only 1/4 is being used.
        buf.sweep((byte) 1);
        buf.fill(24);
        buf.compact();
        assertEquals(16, buf.capacity());
        assertEquals(8, buf.position());
        assertEquals(16, buf.limit());
        buf.clear();
        for (int i = 0; i < 8; i ++) {
            assertEquals(1, buf.get());
        }
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        // Make sure the buffer shrinks when only 1/8 is being used.
        buf.sweep((byte) 1);
        buf.fill(28);
        buf.compact();
        assertEquals(8, buf.capacity());
        assertEquals(4, buf.position());
        assertEquals(8, buf.limit());
        buf.clear();
        for (int i = 0; i < 4; i ++) {
            assertEquals(1, buf.get());
        }
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        // Make sure the buffer shrinks when 0 byte is being used.
        buf.fill(32);
        buf.compact();
        assertEquals(8, buf.capacity());
        assertEquals(0, buf.position());
        assertEquals(8, buf.limit());

        // Expand the buffer.
        buf.capacity(32).clear();
        assertEquals(32, buf.capacity());
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        // Make sure the buffer doesn't shrink when more than 1/4 is being used.
        buf.sweep((byte) 1);
        buf.fill(23);
        buf.compact();
        assertEquals(32, buf.capacity());
        assertEquals(9, buf.position());
        assertEquals(32, buf.limit());
        buf.clear();
        for (int i = 0; i < 9; i ++) {
            assertEquals(1, buf.get());
        }
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