Java ConversionException類代碼示例

import org.apache.commons.beanutils.ConversionException; //導入依賴的package包/類
/**
 * Checks whether the result of a conversion is conform to the specified
 * target type. If this is the case, the passed in result object is cast to
 * the correct target type. Otherwise, an exception is thrown.
 *
 * @param <T> the desired result type
 * @param type the target class of the conversion
 * @param result the conversion result object
 * @return the result cast to the target class
 * @throws ConversionException if the result object is not compatible with
 *         the target type
 */
private static <T> T checkConversionResult(final Class<T> type, final Object result) {
    if (type == null) {
        // in this case we cannot do much; the result object is returned
        @SuppressWarnings("unchecked")
        final
        T temp = (T) result;
        return temp;
    }

    if (result == null) {
        return null;
    }
    if (type.isInstance(result)) {
        return type.cast(result);
    }
    throw new ConversionException("Unsupported target type: " + type);
}
 

import org.apache.commons.beanutils.ConversionException; //導入依賴的package包/類
/**
 * Convert the specified locale-sensitive input object into an output object of the
 * specified type. This method will return values of type Short.
 *
 * @param value The input object to be converted
 * @param pattern The pattern is used for the convertion
 * @return The converted value
 *
 * @throws org.apache.commons.beanutils.ConversionException if conversion cannot be performed
 *  successfully
 * @throws ParseException if an error occurs parsing a String to a Number
 * @since 1.8.0
 */
@Override
protected Object parse(final Object value, final String pattern) throws ParseException {

    final Object result = super.parse(value, pattern);

    if (result == null || result instanceof Short) {
        return result;
    }

    final Number parsed = (Number)result;
    if (parsed.longValue() != parsed.shortValue()) {
        throw new ConversionException("Supplied number is not of type Short: " + parsed.longValue());
    }

    // now returns property Short
    return new Short(parsed.shortValue());
}
 

import org.apache.commons.beanutils.ConversionException; //導入依賴的package包/類
/**
 * Convert the specified locale-sensitive input object into an output object of
 * BigDecimal type.
 *
 * @param value The input object to be converted
 * @param pattern The pattern is used for the convertion
 * @return The converted value
 *
 * @throws ConversionException if conversion cannot be performed
 *  successfully
 * @throws ParseException if an error occurs parsing a String to a Number
 * @since 1.8.0
 */
@Override
protected Object parse(final Object value, final String pattern) throws ParseException {

    final Object result = super.parse(value, pattern);

    if (result == null || result instanceof BigDecimal) {
        return result;
    }

    try {
        return new BigDecimal(result.toString());
    }
    catch (final NumberFormatException ex) {
        throw new ConversionException("Suplied number is not of type BigDecimal: " + result);
    }

}
 

import org.apache.commons.beanutils.ConversionException; //導入依賴的package包/類
/**
 * Convert the specified locale-sensitive input object into an output object of
 * BigInteger type.
 *
 * @param value The input object to be converted
 * @param pattern The pattern is used for the convertion
 * @return The converted value
 *
 * @throws ConversionException if conversion cannot be performed
 *  successfully
 * @throws ParseException if an error occurs parsing a String to a Number
 * @since 1.8.0
 */
@Override
protected Object parse(final Object value, final String pattern) throws ParseException {

    final Object result = super.parse(value, pattern);

    if (result == null || result instanceof BigInteger) {
        return result;
    }

    if (result instanceof Number) {
        return BigInteger.valueOf(((Number)result).longValue());
    }

    try {
        return new BigInteger(result.toString());
    }
    catch (final NumberFormatException ex) {
        throw new ConversionException("Suplied number is not of type BigInteger: " + result);
    }

}
 

import org.apache.commons.beanutils.ConversionException; //導入依賴的package包/類
/**
 * Convert a String into a <code>Number</code> object.
 * @param sourceType the source type of the conversion
 * @param targetType The type to convert the value to
 * @param value The String date value.
 * @param format The NumberFormat to parse the String value.
 *
 * @return The converted Number object.
 * @throws ConversionException if the String cannot be converted.
 */
private Number parse(final Class<?> sourceType, final Class<?> targetType, final String value, final NumberFormat format) {
    final ParsePosition pos = new ParsePosition(0);
    final Number parsedNumber = format.parse(value, pos);
    if (pos.getErrorIndex() >= 0 || pos.getIndex() != value.length() || parsedNumber == null) {
        String msg = "Error converting from '" + toString(sourceType) + "' to '" + toString(targetType) + "'";
        if (format instanceof DecimalFormat) {
            msg += " using pattern '" + ((DecimalFormat)format).toPattern() + "'";
        }
        if (locale != null) {
            msg += " for locale=[" + locale + "]";
        }
        if (log().isDebugEnabled()) {
            log().debug("    " + msg);
        }
        throw new ConversionException(msg);
    }
    return parsedNumber;
}
 

import org.apache.commons.beanutils.ConversionException; //導入依賴的package包/類
/**
 * Parse a String date value using the set of patterns.
 *
 * @param sourceType The type of the value being converted
 * @param targetType The type to convert the value to.
 * @param value The String date value.
 *
 * @return The converted Date object.
 * @throws Exception if an error occurs parsing the date.
 */
private Calendar parse(final Class<?> sourceType, final Class<?> targetType, final String value) throws Exception {
    Exception firstEx = null;
    for (String pattern : patterns) {
        try {
            final DateFormat format = getFormat(pattern);
            final Calendar calendar = parse(sourceType, targetType, value, format);
            return calendar;
        } catch (final Exception ex) {
            if (firstEx == null) {
                firstEx = ex;
            }
        }
    }
    if (patterns.length > 1) {
        throw new ConversionException("Error converting '" + toString(sourceType) + "' to '" + toString(targetType)
                + "' using  patterns '" + displayPatterns + "'");
    } else {
        throw firstEx;
    }
}
 

import org.apache.commons.beanutils.ConversionException; //導入依賴的package包/類
/**
 * <p>Set the value of a simple property with the specified name.</p>
 *
 * @param name Name of the property whose value is to be set
 * @param value Value to which this property is to be set
 *
 * @exception ConversionException if the specified value cannot be
 *  converted to the type required for this property
 * @exception IllegalArgumentException if there is no property
 *  of the specified name
 * @exception NullPointerException if the type specified for the
 *  property is invalid
 * @exception NullPointerException if an attempt is made to set a
 *  primitive property to null
 */
public void set(String name, Object value) {

    DynaProperty descriptor = getDynaProperty(name);
    if (descriptor.getType() == null) {
        throw new NullPointerException
            ("The type for property " + name + " is invalid");
    }
    if (value == null) {
        if (descriptor.getType().isPrimitive()) {
            throw new NullPointerException
                ("Primitive value for '" + name + "'");
        }
    } else if (!isDynaAssignable(descriptor.getType(), value.getClass())) {
        throw new ConversionException
            ("Cannot assign value of type '" +
             value.getClass().getName() +
             "' to property '" + name + "' of type '" +
             descriptor.getType().getName() + "'");
    }
    dynaValues.put(name, value);

}
 

import org.apache.commons.beanutils.ConversionException; //導入依賴的package包/類
public Object convert(Class type, Object value) {
    if (value == null) {
        if (useDefault) {
            return (defaultValue);
        } else {
            throw new ConversionException("No value specified");
        }
    }

    if (value instanceof byte[]) {
        return (value);
    }

    // BLOB類型，canal直接存儲為String("ISO-8859-1")
    if (value instanceof String) {
        try {
            return ((String) value).getBytes("ISO-8859-1");
        } catch (Exception e) {
            throw new ConversionException(e);
        }
    }

    return converter.convert(type, value); // byteConvertor進行轉化
}
 

import org.apache.commons.beanutils.ConversionException; //導入依賴的package包/類
@Test
public void testContextualizeConversionException() {
    final TestBean testBean = new TestBean();
    final DefaultContext context = new DefaultContext();
    context.add("val", "some string");
    try {
        testBean.contextualize(context);
        fail("InvocationTargetException is expected");
    }
    catch (CheckstyleException ex) {
        final String expected = "illegal value ";
        assertTrue("Invalid exception cause, should be: ConversionException",
                ex.getCause() instanceof ConversionException);
        assertTrue("Invalid exception message, should start with: " + expected,
                ex.getMessage().startsWith(expected));
    }
}
 

import org.apache.commons.beanutils.ConversionException; //導入依賴的package包/類
/**
 * <p>Set the value of a simple property with the specified name.</p>
 *
 * @param name  Name of the property whose value is to be set
 * @param value Value to which this property is to be set
 * @throws ConversionException      if the specified value cannot be
 *                                  converted to the type required for
 *                                  this property
 * @throws IllegalArgumentException if there is no property of the
 *                                  specified name
 * @throws NullPointerException     if the type specified for the property
 *                                  is invalid
 * @throws NullPointerException     if an attempt is made to set a
 *                                  primitive property to null
 */
public void set(String name, Object value) {
    DynaProperty descriptor = getDynaProperty(name);

    if (descriptor.getType() == null) {
        throw new NullPointerException("The type for property " + name
            + " is invalid");
    }

    if (value == null) {
        if (descriptor.getType().isPrimitive()) {
            throw new NullPointerException("Primitive value for '" + name
                + "'");
        }
    } else if (!isDynaAssignable(descriptor.getType(), value.getClass())) {
        throw new ConversionException("Cannot assign value of type '"
            + value.getClass().getName() + "' to property '" + name
            + "' of type '" + descriptor.getType().getName() + "'");
    }

    dynaValues.put(name, value);
}
 

import org.apache.commons.beanutils.ConversionException; //導入依賴的package包/類
public Format convertToComplexType(String convertFrom)
		throws ConversionException {
	
	//The patterns can contain the delimiter character.
	int firstSeparator = convertFrom.indexOf(DELIMITER);
	
	if (firstSeparator == -1) {
		throw new IllegalArgumentException("Cannot find the class type for the string " + 
				convertFrom);
	}
	
	String className = convertFrom.substring(0, firstSeparator);
	String pattern = convertFrom.substring(firstSeparator + 1);
	
	if (className.equals(DecimalFormat.class.getSimpleName())) {
		return new DecimalFormat(pattern);
	} else if (className.equals(SimpleDateFormat.class.getSimpleName())) {
		return new SimpleDateFormat(pattern);
	} else {
		throw new IllegalStateException("Unknown class " + className + 
				" to create a format on based on the pattern " + pattern);
	}
}
 

import org.apache.commons.beanutils.ConversionException; //導入依賴的package包/類
/**
 * Convert the specified input object into an output object of the
 * specified type.
 *
 * @param type Data type to which this value should be converted
 * @param value The input value to be converted
 *
 * @exception org.apache.commons.beanutils.ConversionException if conversion cannot be performed
 *  successfully
 */
public Object convert(Class type, Object value) {
    if (value == null) {
        if (useDefault) {
            return (defaultValue);
        } else {
            throw new ConversionException("No value specified");
        }
    }

    if (value instanceof Timestamp) {
        return (value);
    }

    try {
        return (Timestamp.valueOf(value.toString()));
    } catch (Exception e) {
        if (useDefault) {
            return (defaultValue);
        } else {
            throw new ConversionException(e);
        }
    }
}
 

import org.apache.commons.beanutils.ConversionException; //導入依賴的package包/類
/**
 * Convert to wrapped primitive
 * @param source            Source object
 * @param wrapper           Primitive wrapper type
 * @return                  Converted object
 */
public static Object convertToWrappedPrimitive(Object source, Class<?> wrapper) {
	if (source == null || wrapper == null) {
		return null;
	}
	if (wrapper.isInstance(source)) {
		return source;
	}
	if (wrapper.isAssignableFrom(source.getClass())) {
		return source;
	}
	if (source instanceof Number) {
		return convertNumberToWrapper((Number) source, wrapper);
	} else {
		//ensure we dont try to convert text to a number, prevent NumberFormatException
		if (Number.class.isAssignableFrom(wrapper)) {
			//test for int or fp number
			if (!source.toString().matches(NUMERIC_TYPE)) {
				throw new ConversionException(String.format("Unable to convert string %s its not a number type: %s", source, wrapper));
			}
		}
		return convertStringToWrapper(source.toString(), wrapper);
	}
}
 

import org.apache.commons.beanutils.ConversionException; //導入依賴的package包/類
/**
 * Convert string to primitive wrapper like Boolean or Float
 * @param str               String to convert
 * @param wrapper           Primitive wrapper type
 * @return                  Converted object
 */
public static Object convertStringToWrapper(String str, Class<?> wrapper) {
	log.trace("String: {} to wrapper: {}", str, wrapper);
	if (wrapper.equals(String.class)) {
		return str;
	} else if (wrapper.equals(Boolean.class)) {
		return Boolean.valueOf(str);
	} else if (wrapper.equals(Double.class)) {
		return Double.valueOf(str);
	} else if (wrapper.equals(Long.class)) {
		return Long.valueOf(str);
	} else if (wrapper.equals(Float.class)) {
		return Float.valueOf(str);
	} else if (wrapper.equals(Integer.class)) {
		return Integer.valueOf(str);
	} else if (wrapper.equals(Short.class)) {
		return Short.valueOf(str);
	} else if (wrapper.equals(Byte.class)) {
		return Byte.valueOf(str);
	}
	throw new ConversionException(String.format("Unable to convert string to: %s", wrapper));
}
 

import org.apache.commons.beanutils.ConversionException; //導入依賴的package包/類
/**
 * Convert number to primitive wrapper like Boolean or Float
 * @param num               Number to conver
 * @param wrapper           Primitive wrapper type
 * @return                  Converted object
 */
public static Object convertNumberToWrapper(Number num, Class<?> wrapper) {
	//XXX Paul: Using valueOf will reduce object creation
	if (wrapper.equals(String.class)) {
		return num.toString();
	} else if (wrapper.equals(Boolean.class)) {
		return Boolean.valueOf(num.intValue() == 1);
	} else if (wrapper.equals(Double.class)) {
		return Double.valueOf(num.doubleValue());
	} else if (wrapper.equals(Long.class)) {
		return Long.valueOf(num.longValue());
	} else if (wrapper.equals(Float.class)) {
		return Float.valueOf(num.floatValue());
	} else if (wrapper.equals(Integer.class)) {
		return Integer.valueOf(num.intValue());
	} else if (wrapper.equals(Short.class)) {
		return Short.valueOf(num.shortValue());
	} else if (wrapper.equals(Byte.class)) {
		return Byte.valueOf(num.byteValue());
	}
	throw new ConversionException(String.format("Unable to convert number to: %s", wrapper));
}