Examples of org.archive.spring.Sheet

org.archive.spring.Sheet
Collection of overrides: alternative values for object properties that should apply in some contexts. The target is specified as an arbitrarily-long property-path, a string describing how to access the property starting from a beanName in a BeanFactory. Once a Sheet has all its mappings, and all beans that could be affected by its mappings have been instantiated, the sheet must be 'primed' with respect to the bean factory. This step lets every target of the overlay values know the full bean-path(s) that it should check for overlays. (Otherwise, beans -- especially unnamed inner beans -- may not know the full-paths that lead to their properties.) Also, this step catches in advance type mismatches, or attempts to overlay non-overlayable properties.

     * Retrieve the named overlay Map.
     * 
     * @see org.archive.spring.OverlayMapsSource#getOverlayMap(java.lang.String)
     */
    public Map<String, Object> getOverlayMap(String name) {
        Sheet sheet = sheetsByName.get(name);
        if (sheet != null) {
            return sheet.getMap();
        } else {
            return null;
        }
    }

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     * @param beanPath target bean-path of overlay
     * @param value new value
     * @return old value, if any
     */
    public Object putSheetOverlay(String sheetName, String beanPath, Object value) {
        Sheet sheet = getOrCreateSheet(sheetName); 
        Object prevVal = sheet.getMap().put(beanPath, value);
        try {
            sheet.prime(); 
        } catch (TypeMismatchException tme) {
            // revert to presumably non-damaging value
            sheet.getMap().put(beanPath, prevVal);
            throw tme;
        }
        return prevVal; 
    }

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     * @param sheetName sheet name from which to remove overlay
     * @param beanPath overlay to remove
     * @return previous overlay value, if any
     */
    public Object removeSheetOverlay(String sheetName, String beanPath) {
        Sheet sheet = sheetsByName.get(sheetName); 
        if(sheet==null) {
            return null; 
        }
        // TODO: do all the externalPaths created by priming need eventual cleanup?
        return sheet.getMap().remove(beanPath);
    }

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     * 
     * @param name Sheet name to create; must be unique
     * @return created Sheet
     */
    public Sheet getOrCreateSheet(String name) {
        Sheet sheet = sheetsByName.get(name); 
        if(sheet==null) {
            sheet = new Sheet(); 
            sheet.setBeanFactory(beanFactory);
            sheet.setName(name); 
            sheet.setMap(new HashMap<String, Object>());
            sheetsByName.put(name, sheet);
        }
        return sheet;
    }

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Related Classes of org.archive.spring.Sheet

org.archive.crawler.spring.SheetOverlaysManager

org.springframework.beans.BeanWrapperImpl

java.beans.PropertyChangeEvent

org.springframework.beans.TypeMismatchException

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