localebeanutilsbean.java

JAVA 文章管理系统源码

     * @param name The property name
     * @param propName The Simple name of target property
     *
     * @exception IllegalAccessException if the caller does not have
     *  access to the property accessor method
     * @exception InvocationTargetException if the property accessor method
     *  throws an exception
     */
    protected Class definePropertyType(Object target, String name, String propName)
            throws IllegalAccessException, InvocationTargetException {

        Class type = null;               // Java type of target property

        if (target instanceof DynaBean) {
            DynaClass dynaClass = ((DynaBean) target).getDynaClass();
            DynaProperty dynaProperty = dynaClass.getDynaProperty(propName);
            if (dynaProperty == null) {
                return null; // Skip this property setter
            }
            type = dynaProperty.getType();
        }
        else {
            PropertyDescriptor descriptor = null;
            try {
                descriptor =
                        getPropertyUtils().getPropertyDescriptor(target, name);
                if (descriptor == null) {
                    return null; // Skip this property setter
                }
            }
            catch (NoSuchMethodException e) {
                return null; // Skip this property setter
            }
            if (descriptor instanceof MappedPropertyDescriptor) {
                type = ((MappedPropertyDescriptor) descriptor).
                        getMappedPropertyType();
            }
            else if (descriptor instanceof IndexedPropertyDescriptor) {
                type = ((IndexedPropertyDescriptor) descriptor).
                        getIndexedPropertyType();
            }
            else {
                type = descriptor.getPropertyType();
            }
        }
        return type;
    }

    /**
     * Convert the specified value to the required type using the
     * specified convertion pattern.
     *
     * @param type The Java type of target property
     * @param index The indexed subscript value (if any)
     * @param value The value to be converted
     * @param pattern The convertion pattern
     */
    protected Object convert(Class type, int index, Object value, String pattern) {
		
		if (log.isTraceEnabled()) {
			log.trace("Converting value '" + value + "' to type:" + type);
		}
		
        Object newValue = null;

        if (type.isArray() && (index < 0)) { // Scalar value into array
            if (value instanceof String) {
                String values[] = new String[1];
                values[0] = (String) value;
                newValue = getLocaleConvertUtils().convert((String[]) values, type, pattern);
            }
            else if (value instanceof String[]) {
                newValue = getLocaleConvertUtils().convert((String[]) value, type, pattern);
            }
            else {
                newValue = value;
            }
        }
        else if (type.isArray()) {         // Indexed value into array
            if (value instanceof String) {
                newValue = getLocaleConvertUtils().convert((String) value,
                        type.getComponentType(), pattern);
            }
            else if (value instanceof String[]) {
                newValue = getLocaleConvertUtils().convert(((String[]) value)[0],
                        type.getComponentType(), pattern);
            }
            else {
                newValue = value;
            }
        }
        else {                             // Value into scalar
            if (value instanceof String) {
                newValue = getLocaleConvertUtils().convert((String) value, type, pattern);
            }
            else if (value instanceof String[]) {
                newValue = getLocaleConvertUtils().convert(((String[]) value)[0],
                        type, pattern);
            }
            else {
                newValue = value;
            }
        }
        return newValue;
    }

    /**
     *  Convert the specified value to the required type.
     *
     * @param type The Java type of target property
     * @param index The indexed subscript value (if any)
     * @param value The value to be converted
     */
    protected Object convert(Class type, int index, Object value) {

        Object newValue = null;

        if (type.isArray() && (index < 0)) { // Scalar value into array
            if (value instanceof String) {
                String values[] = new String[1];
                values[0] = (String) value;
                newValue = ConvertUtils.convert((String[]) values, type);
            }
            else if (value instanceof String[]) {
                newValue = ConvertUtils.convert((String[]) value, type);
            }
            else {
                newValue = value;
            }
        }
        else if (type.isArray()) {         // Indexed value into array
            if (value instanceof String) {
                newValue = ConvertUtils.convert((String) value,
                        type.getComponentType());
            }
            else if (value instanceof String[]) {
                newValue = ConvertUtils.convert(((String[]) value)[0],
                        type.getComponentType());
            }
            else {
                newValue = value;
            }
        }
        else {                             // Value into scalar
            if (value instanceof String) {
                newValue = ConvertUtils.convert((String) value, type);
            }
            else if (value instanceof String[]) {
                newValue = ConvertUtils.convert(((String[]) value)[0],
                        type);
            }
            else {
                newValue = value;
            }
        }
        return newValue;
    }

    /**
     * Invoke the setter method.
     *
     * @param target The bean
     * @param propName The Simple name of target property
     * @param key The Mapped key value (if any)
     * @param index The indexed subscript value (if any)
     * @param newValue The value to be set
     *
     * @exception IllegalAccessException if the caller does not have
     *  access to the property accessor method
     * @exception InvocationTargetException if the property accessor method
     *  throws an exception
     */
    protected void invokeSetter(Object target, String propName, String key, int index, Object newValue)
            throws IllegalAccessException, InvocationTargetException {

        try {
            if (index >= 0) {
                getPropertyUtils().setIndexedProperty(target, propName,
                        index, newValue);
            }
            else if (key != null) {
                getPropertyUtils().setMappedProperty(target, propName,
                        key, newValue);
            }
            else {
                getPropertyUtils().setProperty(target, propName, newValue);
            }
        }
        catch (NoSuchMethodException e) {
            throw new InvocationTargetException
                    (e, "Cannot set " + propName);
        }
    }

    /**
     * Resolve any nested expression to get the actual target bean.
     *
     * @param bean The bean
     * @param name The property name
     *
     * @exception IllegalAccessException if the caller does not have
     *  access to the property accessor method
     * @exception InvocationTargetException if the property accessor method
     *  throws an exception
     */
    protected Descriptor calculate(Object bean, String name)
            throws IllegalAccessException, InvocationTargetException {

        String propName = null;          // Simple name of target property
        int index = -1;                  // Indexed subscript value (if any)
        String key = null;               // Mapped key value (if any)

        Object target = bean;
        int delim = name.lastIndexOf(PropertyUtils.NESTED_DELIM);
        if (delim >= 0) {
            try {
                target =
                        getPropertyUtils().getProperty(bean, name.substring(0, delim));
            }
            catch (NoSuchMethodException e) {
                return null; // Skip this property setter
            }
            name = name.substring(delim + 1);
            if (log.isTraceEnabled()) {
                log.trace("    Target bean = " + target);
                log.trace("    Target name = " + name);
            }
        }

        // Calculate the property name, index, and key values
        propName = name;
        int i = propName.indexOf(PropertyUtils.INDEXED_DELIM);
        if (i >= 0) {
            int k = propName.indexOf(PropertyUtils.INDEXED_DELIM2);
            try {
                index =
                        Integer.parseInt(propName.substring(i + 1, k));
            }
            catch (NumberFormatException e) {
                ;
            }
            propName = propName.substring(0, i);
        }
        int j = propName.indexOf(PropertyUtils.MAPPED_DELIM);
        if (j >= 0) {
            int k = propName.indexOf(PropertyUtils.MAPPED_DELIM2);
            try {
                key = propName.substring(j + 1, k);
            }
            catch (IndexOutOfBoundsException e) {
                ;
            }
            propName = propName.substring(0, j);
        }
        return new Descriptor(target, name, propName, key, index);
    }

    protected class Descriptor {

        private int index = -1;    // Indexed subscript value (if any)
        private String name;
        private String propName;   // Simple name of target property
        private String key;        // Mapped key value (if any)
        private Object target;

        public Descriptor(Object target, String name, String propName, String key, int index) {

            setTarget(target);
            setName(name);
            setPropName(propName);
            setKey(key);
            setIndex(index);
        }

        public Object getTarget() {
            return target;
        }

        public void setTarget(Object target) {
            this.target = target;
        }

        public String getKey() {
            return key;
        }

        public void setKey(String key) {
            this.key = key;
        }

        public int getIndex() {
            return index;
        }

        public void setIndex(int index) {
            this.index = index;
        }

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }

        public String getPropName() {
            return propName;
        }

        public void setPropName(String propName) {
            this.propName = propName;
        }
    }
}