tableproperties.java

dispalytag的源码

    /**
     * Returns the configured list of media.
     * @return the value of <code>PROPERTY_EXPORTTYPES</code>
     */
    public String[] getExportTypes()
    {
        String list = getProperty(PROPERTY_EXPORTTYPES);
        if (list == null)
        {
            return new String[0];
        }

        return StringUtils.split(list);
    }

    /**
     * Returns the class responsible for the given export.
     * @param exportName export name
     * @return String classname
     */
    public String getExportClass(String exportName)
    {
        return getProperty(PROPERTY_EXPORT_PREFIX + SEP + exportName + SEP + EXPORTPROPERTY_STRING_CLASS);
    }

    /**
     * Returns an instance of configured requestHelperFactory.
     * @return RequestHelperFactory instance.
     * @throws FactoryInstantiationException if unable to load or instantiate the configurated class.
     */
    public RequestHelperFactory getRequestHelperFactoryInstance() throws FactoryInstantiationException
    {
        Object loadedObject = getClassPropertyInstance(PROPERTY_CLASS_REQUESTHELPERFACTORY);

        // should not be null, but avoid errors just in case... see DISPL-148
        if (loadedObject == null)
        {
            return new DefaultRequestHelperFactory();
        }

        try
        {
            return (RequestHelperFactory) loadedObject;
        }
        catch (ClassCastException e)
        {
            throw new FactoryInstantiationException(getClass(), PROPERTY_CLASS_REQUESTHELPERFACTORY, loadedObject
                .getClass()
                .getName(), e);
        }
    }

    /**
     * Returns an instance of configured DecoratorFactory.
     * @return DecoratorFactory instance.
     * @throws FactoryInstantiationException if unable to load or instantiate the configurated class.
     */
    public DecoratorFactory getDecoratorFactoryInstance() throws FactoryInstantiationException
    {
        Object loadedObject = getClassPropertyInstance(PROPERTY_CLASS_DECORATORFACTORY);

        if (loadedObject == null)
        {
            return new DefaultDecoratorFactory();
        }

        try
        {
            return (DecoratorFactory) loadedObject;
        }
        catch (ClassCastException e)
        {
            throw new FactoryInstantiationException(getClass(), PROPERTY_CLASS_DECORATORFACTORY, loadedObject
                .getClass()
                .getName(), e);
        }
    }

    public String getPaginationSortParam()
    {
        String result = getProperty(PROPERTY_STRING_PAGINATION_SORT_PARAM);
        if (result == null)
        {
            result = "sort";
        }
        return result;
    }

    public String getPaginationPageNumberParam()
    {
        String result = getProperty(PROPERTY_STRING_PAGINATION_PAGE_NUMBER_PARAM);
        if (result == null)
        {
            result = "page";
        }
        return result;
    }

    public String getPaginationSortDirectionParam()
    {
        String result = getProperty(PROPERTY_STRING_PAGINATION_SORT_DIRECTION_PARAM);
        if (result == null)
        {
            result = "dir";
        }
        return result;
    }

    public String getPaginationSearchIdParam()
    {
        String result = getProperty(PROPERTY_STRING_PAGINATION_SEARCH_ID_PARAM);
        if (result == null)
        {
            result = "searchId";
        }
        return result;
    }

    public String getPaginationAscValue()
    {
        String result = getProperty(PROPERTY_STRING_PAGINATION_ASC_VALUE);
        if (result == null)
        {
            result = "asc";
        }
        return result;
    }

    public String getPaginationDescValue()
    {
        String result = getProperty(PROPERTY_STRING_PAGINATION_DESC_VALUE);
        if (result == null)
        {
            result = "desc";
        }
        return result;
    }

    public boolean getPaginationSkipPageNumberInSort()
    {
        String s = getProperty(PROPERTY_BOOLEAN_PAGINATION_SKIP_PAGE_NUMBER_IN_SORT);
        if (s == null)
        {
            return true;
        }
        else
        {
            return getBooleanProperty(PROPERTY_BOOLEAN_PAGINATION_SKIP_PAGE_NUMBER_IN_SORT);
        }
    }

    // </JBN>

    /**
     * Returns the configured resource provider instance. If necessary instantiate the resource provider from config and
     * then keep a cached instance.
     * @return I18nResourceProvider instance.
     * @see I18nResourceProvider
     */
    public I18nResourceProvider geResourceProvider()
    {
        String className = getProperty(PROPERTY_CLASS_LOCALEPROVIDER);

        if (resourceProvider == null)
        {
            if (className != null)
            {
                try
                {
                    Class classProperty = ReflectHelper.classForName(className);
                    resourceProvider = (I18nResourceProvider) classProperty.newInstance();

                    log.info(Messages.getString("TableProperties.classinitializedto", //$NON-NLS-1$
                        new Object[]{ClassUtils.getShortClassName(I18nResourceProvider.class), className}));
                }
                catch (Throwable e)
                {
                    log.warn(Messages.getString("TableProperties.errorloading", //$NON-NLS-1$
                        new Object[]{
                            ClassUtils.getShortClassName(I18nResourceProvider.class),
                            e.getClass().getName(),
                            e.getMessage()}));
                }
            }
            else
            {
                log.info(Messages.getString("TableProperties.noconfigured", //$NON-NLS-1$
                    new Object[]{ClassUtils.getShortClassName(I18nResourceProvider.class)}));
            }

            // still null?
            if (resourceProvider == null)
            {
                // fallback provider, no i18n
                resourceProvider = new I18nResourceProvider()
                {

                    // Always returns null
                    public String getResource(String titleKey, String property, Tag tag, PageContext context)
                    {
                        return null;
                    }
                };
            }
        }

        return resourceProvider;
    }

    /**
     * Reads a String property.
     * @param key property name
     * @return property value or <code>null</code> if property is not found
     */
    private String getProperty(String key)
    {
        return this.properties.getProperty(key);
    }

    /**
     * Sets a property.
     * @param key property name
     * @param value property value
     */
    public void setProperty(String key, String value)
    {
        this.properties.setProperty(key, value);
    }

    /**
     * Reads a boolean property.
     * @param key property name
     * @return boolean <code>true</code> if the property value is "true", <code>false</code> for any other value.
     */
    private boolean getBooleanProperty(String key)
    {
        return Boolean.TRUE.toString().equals(getProperty(key));
    }

    /**
     * Returns an instance of a configured Class. Returns a configured Class instantiated
     * callingClass.forName([configuration value]).
     * @param key configuration key
     * @return instance of configured class
     * @throws FactoryInstantiationException if unable to load or instantiate the configurated class.
     */
    private Object getClassPropertyInstance(String key) throws FactoryInstantiationException
    {
        Object instance = objectCache.get(key);
        if (instance != null)
        {
            return instance;
        }

        String className = getProperty(key);

        // shouldn't be null, but better check it
        if (className == null)
        {
            return null;
        }

        try
        {
            Class classProperty = ReflectHelper.classForName(className);
            instance = classProperty.newInstance();
            objectCache.put(key, instance);
            return instance;
        }
        catch (Exception e)
        {
            throw new FactoryInstantiationException(getClass(), key, className, e);
        }
    }

    /**
     * Reads an int property.
     * @param key property name
     * @param defaultValue default value returned if property is not found or not a valid int value
     * @return property value
     */
    private int getIntProperty(String key, int defaultValue)
    {
        try
        {
            return Integer.parseInt(getProperty(key));
        }
        catch (NumberFormatException e)
        {
            // Don't care, use default
            log.warn(Messages.getString("TableProperties.invalidvalue", //$NON-NLS-1$
                new Object[]{key, getProperty(key), new Integer(defaultValue)}));
        }

        return defaultValue;
    }

    /**
     * Obtain the name of the decorator configured for a given media type.
     * @param thatEnum A media type
     * @return The name of the decorator configured for a given media type.
     * @deprecated Use getMediaTypeDecoratorName instead.
     */
    public String getExportDecoratorName(MediaTypeEnum thatEnum)
    {
        return getProperty(PROPERTY_EXPORT_PREFIX + SEP + thatEnum + SEP + PROPERTY_DECORATOR_SUFFIX);
    }

    /**
     * Obtain the name of the decorator configured for a given media type.
     * @param thatEnum A media type
     * @return The name of the decorator configured for a given media type.
     */
	public String getMediaTypeDecoratorName(MediaTypeEnum thatEnum)
	{
        return getProperty(PROPERTY_DECORATOR_SUFFIX + SEP + PROPERTY_DECORATOR_MEDIA + SEP + thatEnum);
	}

    public Comparator getDefaultComparator()
    {
        String className = getProperty(PROPERTY_DEFAULT_COMPARATOR);  
        if (className != null)
        {
            try
            {
                Class classProperty = ReflectHelper.classForName(className);
                return (Comparator) classProperty.newInstance();
            }
            catch (Throwable e)
            {
                log.warn(Messages.getString("TableProperties.errorloading", //$NON-NLS-1$
                    new Object[]{
                        ClassUtils.getShortClassName(Comparator.class),
                        e.getClass().getName(),
                        e.getMessage()}));
            }
        }
        return new DefaultComparator(Collator.getInstance(getLocale()));
    }
}