return boostExpression;
    }

    /**
     * Sets the boost expression used to calculate boost values.
     *
     * @param expression the boost expression string
     */
    public void setBoostExpression(final String expression) {
        boostExpression = expression;
    }

    /**
     * Gets the current match expression.
     *
     * @return the match expression string
     */

        docBoostMatcher.setBoostExpression("100L");

        final Map<String, Object> map = new HashMap<String, Object>();
        map.put("data1", 1);
        assertEquals(100.0f, docBoostMatcher.getValue(map));
    }

    @Test
    public void test_getValue_numericStringReturn() {
        final DocBoostMatcher docBoostMatcher = new DocBoostMatcher();
        docBoostMatcher.setBoostExpression("'3.14'");