Examples of javax.sql.rowset.serial.SQLInputImpl

javax.sql.rowset.serial.SQLInputImpl
An input stream used for custom mapping user-defined types (UDTs). An SQLInputImpl object is an input stream that contains a stream of values that are the attributes of a UDT.
This class is used by the driver behind the scenes when the method getObject is called on an SQL structured or distinct type that has a custom mapping; a programmer never invokes SQLInputImpl methods directly. They are provided here as a convenience for those who write RowSet implementations.
The SQLInputImpl class provides a set of reader methods analogous to the ResultSet getter methods. These methods make it possible to read the values in an SQLInputImpl object.
The method wasNull is used to determine whether the the last value read was SQL NULL.
When the method getObject is called with an object of a class implementing the interface SQLData, the JDBC driver calls the method SQLData.getSQLType to determine the SQL type of the UDT being custom mapped. The driver creates an instance of SQLInputImpl, populating it with the attributes of the UDT. The driver then passes the input stream to the method SQLData.readSQL, which in turn calls the SQLInputImpl reader methods to read the attributes from the input stream. @since 1.5 @see java.sql.SQLData

     * @tests {@link javax.sql.rowset.serial.SQLInputImpl#readRef()}
     */
    public void testReadRef() throws SQLException {
        Ref ref = new MockRef();
        Object[] attributes = new Object[] { ref };
        SQLInputImpl impl = new SQLInputImpl(attributes,
                new HashMap<String, Class<?>>());
        assertEquals(ref, impl.readRef());


        try {
            impl.readRef();
            fail("should throw SQLException");
        } catch (SQLException e) {
            // expected
        }


        attributes = new Object[] { null };
        impl = new SQLInputImpl(attributes, new HashMap<String, Class<?>>());
        assertNull(impl.readRef());
    }

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    /**
     * @tests {@link javax.sql.rowset.serial.SQLInputImpl#readShort()}
     */
    public void testReadShort() throws SQLException {
        Object[] attributes = new Object[] { Short.valueOf("3") };
        SQLInputImpl impl = new SQLInputImpl(attributes,
                new HashMap<String, Class<?>>());
        assertEquals((short) 3, impl.readShort());


        try {
            impl.readShort();
            fail("should throw SQLException");
        } catch (SQLException e) {
            // expected
        }


        attributes = new Object[] { null };
        impl = new SQLInputImpl(attributes, new HashMap<String, Class<?>>());
        assertEquals((short) 0, impl.readShort());
    }

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    /**
     * @tests {@link javax.sql.rowset.serial.SQLInputImpl#readString()}
     */
    public void testReadString() throws SQLException {
        Object[] attributes = new Object[] { "hello" };
        SQLInputImpl impl = new SQLInputImpl(attributes,
                new HashMap<String, Class<?>>());
        assertEquals("hello", impl.readString());


        try {
            impl.readString();
            fail("should throw SQLException");
        } catch (SQLException e) {
            // expected
        }


        attributes = new Object[] { null };
        impl = new SQLInputImpl(attributes, new HashMap<String, Class<?>>());
        assertNull(impl.readString());
    }

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     * @tests {@link javax.sql.rowset.serial.SQLInputImpl#readTime()}
     */
    public void testReadTime() throws SQLException {
        Time time = new Time(345);
        Object[] attributes = new Object[] { time };
        SQLInputImpl impl = new SQLInputImpl(attributes,
                new HashMap<String, Class<?>>());
        assertEquals(time, impl.readTime());


        try {
            impl.readTime();
            fail("should throw SQLException");
        } catch (SQLException e) {
            // expected
        }


        attributes = new Object[] { null };
        impl = new SQLInputImpl(attributes, new HashMap<String, Class<?>>());
        assertNull(impl.readTime());
    }

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     * @tests {@link javax.sql.rowset.serial.SQLInputImpl#readTimestamp()}
     */
    public void testReadTimestamp() throws SQLException {
        Timestamp time = new Timestamp(345);
        Object[] attributes = new Object[] { time };
        SQLInputImpl impl = new SQLInputImpl(attributes,
                new HashMap<String, Class<?>>());
        assertEquals(time, impl.readTimestamp());


        try {
            impl.readTimestamp();
            fail("should throw SQLException");
        } catch (SQLException e) {
            // expected
        }
    }

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     */
    public void testReadURL() throws SQLException, MalformedURLException {
        URL url = new URL("http://www.apache.org");
        SerialDatalink link = new SerialDatalink(url);
        Object[] attributes = new Object[] { link };
        SQLInputImpl impl = new SQLInputImpl(attributes,
                new HashMap<String, Class<?>>());
        try {
            impl.readURL();
            fail("should throw SQLException");
        } catch (SQLException e) {
            // expected
        }


        try {
            impl.readURL();
            fail("should throw SQLException");
        } catch (SQLException e) {
            // expected
        }
    }

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    /**
     * @tests {@link javax.sql.rowset.serial.SQLInputImpl#wasNull()}
     */
    public void testWasNull() throws SQLException {
        Object[] attributes = new Object[] { null, "hello" };
        SQLInputImpl impl = new SQLInputImpl(attributes,
                new HashMap<String, Class<?>>());
        assertFalse(impl.wasNull());
        assertEquals(null, impl.readString());
        assertTrue(impl.wasNull());
        assertEquals("hello", impl.readString());
        assertFalse(impl.wasNull());
        try {
            impl.readString();
            fail("should throw SQLException");
        } catch (SQLException e) {
            // expected
        }
        assertFalse(impl.wasNull());
        assertFalse(impl.wasNull());
    }

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     * @tests {@link javax.sql.rowset.serial.SQLInputImpl#readArray()}
     */
    public void testReadArray() throws SQLException {
        Array array = new MockArray();
        Object[] attributes = new Object[] { array };
        SQLInputImpl impl = new SQLInputImpl(attributes,
                new HashMap<String, Class<?>>());
        assertEquals(array, impl.readArray());


        try {
            impl.readArray();
            fail("should throw SQLException");
        } catch (SQLException e) {
            // expected
        }


        attributes = new Object[] { null };
        impl = new SQLInputImpl(attributes, new HashMap<String, Class<?>>());
        assertNull(impl.readArray());
    }

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     * @tests {@link javax.sql.rowset.serial.SQLInputImpl#readAsciiStream()}
     */
    public void testReadAsciiStream() throws SQLException {
        InputStream stream = new ByteArrayInputStream("abc".getBytes());
        Object[] attributes = new Object[] { stream };
        SQLInputImpl impl = new SQLInputImpl(attributes,
                new HashMap<String, Class<?>>());
        assertEquals(stream, impl.readAsciiStream());


        try {
            impl.readAsciiStream();
            fail("should throw SQLException");
        } catch (SQLException e) {
            // expected
        }


        attributes = new Object[] { null };
        impl = new SQLInputImpl(attributes, new HashMap<String, Class<?>>());
        assertNull(impl.readAsciiStream());
    }

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     * @tests {@link javax.sql.rowset.serial.SQLInputImpl#readBigDecimal()}
     */
    public void testReadBigDecimal() throws SQLException {
        BigDecimal bd = new BigDecimal("12.5");
        Object[] attributes = new Object[] { bd };
        SQLInputImpl impl = new SQLInputImpl(attributes,
                new HashMap<String, Class<?>>());
        assertEquals(bd, impl.readBigDecimal());


        try {
            impl.readBigDecimal();
            fail("should throw SQLException");
        } catch (SQLException e) {
            // expected
        }


        attributes = new Object[] { null };
        impl = new SQLInputImpl(attributes, new HashMap<String, Class<?>>());
        assertNull(impl.readBigDecimal());
    }

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