public ResourceArrayPropertyEditor() 
{
		this.resourcePatternResolver = new PathMatchingResourcePatternResolver();
}

Create a new ResourceArrayPropertyEditor with a default PathMatchingResourcePatternResolver.

Also see:

PathMatchingResourcePatternResolver

 public ResourceArrayPropertyEditor(ResourcePatternResolver resourcePatternResolver) 
{
		this.resourcePatternResolver = resourcePatternResolver;
}

Create a new ResourceArrayPropertyEditor with the given ResourcePatternResolver.

Parameters:

resourcePatternResolver - the ResourcePatternResolver to use

 protected String resolvePath(String path) 
{
		return SystemPropertyUtils.resolvePlaceholders(path);
}

Resolve the given path, replacing placeholders with corresponding system property values if necessary.

 public  void setAsText(String text) 
{
		String pattern = resolvePath(text).trim();
		try {
			setValue(this.resourcePatternResolver.getResources(pattern));
		}
		catch (IOException ex) {
			throw new IllegalArgumentException(
			    "Could not resolve resource location pattern [" + pattern + "]: " + ex.getMessage());
		}
}

Treat the given text as location pattern and convert it to a Resource array.

 public  void setValue(Object value) throws IllegalArgumentException 
{
		if (value instanceof Collection || (value instanceof Object[] && !(value instanceof Resource[]))) {
			Collection input = (value instanceof Collection ? (Collection) value : Arrays.asList((Object[]) value));
			List merged = new ArrayList();
			for (Iterator it = input.iterator(); it.hasNext();) {
				Object element = it.next();
				if (element instanceof String) {
					// A location pattern: resolve it into a Resource array.
					// Might point to a single resource or to multiple resources.
					String pattern = resolvePath((String) element).trim();
					try {
						Resource[] resources = this.resourcePatternResolver.getResources(pattern);
						for (int i = 0; i <  resources.length; i++) {
							Resource resource = resources[i];
							if (!merged.contains(resource)) {
								merged.add(resource);
							}
						}
					}
					catch (IOException ex) {
						throw new IllegalArgumentException(
								"Could not resolve resource location pattern [" + pattern + "]: " + ex.getMessage());
					}
				}
				else if (element instanceof Resource) {
					// A Resource object: add it to the result.
					if (!merged.contains(element)) {
						merged.add(element);
					}
				}
				else {
					throw new IllegalArgumentException("Cannot convert element [" + element + "] to [" +
							Resource.class.getName() + "]: only location String and Resource object supported");
				}
			}
			super.setValue(merged.toArray(new Resource[merged.size()]));
		}
		else {
			// An arbitrary value: probably a String or a Resource array.
			// setAsText will be called for a String; a Resource array will be used as-is.
			super.setValue(value);
		}
}

Treat the given value as collection or array and convert it to a Resource array. Considers String elements as location patterns, and takes Resource elements as-is.