Examples of java.nio.MappedByteBuffer.position()

java.nio.MappedByteBuffer.position()

        else
        {
            segBuffer = segments.get(seg);
        }
        
        segBuffer.position(segOff);
        segBuffer.limit(segOff + blockSize);
        
        ByteBuffer toReturn = segBuffer.slice();
        
        segBuffer.limit(segBuffer.capacity());

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        MappedByteBuffer mapped = readWriteFileChannel.map(MapMode.PRIVATE, 0,
                CONTENT_LENGTH);
        readWriteFileChannel.close();
        mapped.put(TEST_BYTES);
        assertEquals(CONTENT_LENGTH, mapped.limit());
        assertEquals("test".length(), mapped.position());
    }


    /**
     * @tests java.nio.channels.FileChannel#map(MapMode,long,long)
     */

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        } catch (ReadOnlyBufferException ex) {
            // expected;
        }
        assertEquals(CONTENT_LENGTH, mapped.limit());
        assertEquals(CONTENT_LENGTH, mapped.capacity());
        assertEquals(0, mapped.position());


        // try to get a readonly map from read/write channel
        writeDataToFile(fileOfReadWriteFileChannel);
        mapped = readWriteFileChannel.map(MapMode.READ_ONLY, 0, CONTENT
                .length());

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        writeDataToFile(fileOfReadWriteFileChannel);
        mapped = readWriteFileChannel.map(MapMode.READ_ONLY, 0, CONTENT
                .length());
        assertEquals(CONTENT_LENGTH, mapped.limit());
        assertEquals(CONTENT_LENGTH, mapped.capacity());
        assertEquals(0, mapped.position());


        // map not change channel's position
        assertEquals(0, readOnlyFileChannel.position());
        assertEquals(0, readWriteFileChannel.position());
    }

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        this.writeDataToFile(fileOfReadOnlyFileChannel);
        MappedByteBuffer mapped = readOnlyFileChannel.map(MapMode.READ_ONLY,
                10, CONTENT_LENGTH - 10);
        assertEquals(CONTENT_LENGTH - 10, mapped.limit());
        assertEquals(CONTENT_LENGTH - 10, mapped.capacity());
        assertEquals(0, mapped.position());
    }


    /**
     * @tests java.nio.channels.FileChannel#map(MapMode,long,long)
     */

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    public void test_map_Private_NonZeroPosition() throws IOException {
        MappedByteBuffer mapped = readWriteFileChannel.map(MapMode.PRIVATE, 10,
                CONTENT_LENGTH - 10);
        assertEquals(CONTENT_LENGTH - 10, mapped.limit());
        assertEquals(CONTENT_LENGTH - 10, mapped.capacity());
        assertEquals(0, mapped.position());
    }


    /**
     * @tests java.nio.channels.FileChannel#map(MapMode,long,long)
     */

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        writeDataToFile(fileOfReadWriteFileChannel);
        MappedByteBuffer mapped = readWriteFileChannel.map(MapMode.READ_WRITE,
                10, CONTENT_LENGTH - 10);
        assertEquals(CONTENT_LENGTH - 10, mapped.limit());
        assertEquals(CONTENT.length() - 10, mapped.capacity());
        assertEquals(0, mapped.position());
        mapped.put(TEST_BYTES);
        ByteBuffer checkBuffer = ByteBuffer.allocate(CONTENT_LENGTH);
        readWriteFileChannel.read(checkBuffer);
        String expected = CONTENT.substring(0, 10) + "test"
                + CONTENT.substring(10 + "test".length());

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            assertEquals("Incorrectly mapped file channel for " + sizes[i]
                    + " position (capacity)", CONTENT_LEN, mapped.capacity());
            assertEquals("Incorrectly mapped file channel for " + sizes[i]
                    + " position (limit)", CONTENT_LEN, mapped.limit());
            assertEquals("Incorrectly mapped file channel for " + sizes[i]
                    + " position (position)", 0, mapped.position());


            // map not change channel's position
            assertEquals(0, readOnlyFileChannel.position());


            // Close the file and the channel before the next iteration

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            if (mapN >= mappedBuffers.length) // we have run out of data to read from
                break;
            MappedByteBuffer currentBuffer = mappedBuffers[mapN];
            if (offN > currentBuffer.limit())
                break;
            currentBuffer.position(offN);
            int bytesFromThisBuffer = Math.min(len - totalRead, currentBuffer.remaining());
            currentBuffer.get(bytes, off, bytesFromThisBuffer);
            off += bytesFromThisBuffer;
            pos += bytesFromThisBuffer;
            totalRead += bytesFromThisBuffer;

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        MappedByteBuffer mapped = readWriteFileChannel.map(MapMode.PRIVATE, 0,
                CONTENT_LENGTH);
        readWriteFileChannel.close();
        mapped.put(TEST_BYTES);
        assertEquals(CONTENT_LENGTH, mapped.limit());
        assertEquals("test".length(), mapped.position());
    }


    /**
     * @tests java.nio.channels.FileChannel#map(MapMode,long,long)
     */

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