return ((Double) value).floatValue();
        }
        if (value != null) {
            return Float.parseFloat(value.toString());
        }

        return 0.0f;
    }

    public String getBoostExpression() {
        return boostExpression;
    }

    public void setBoostExpression(final String expression) {
        boostExpression = expression;
    }

    public String getMatchExpression() {