Examples with ViewFilterResource org.structr.rest.resource.ViewFilterResource used on opensource projects

Example 1 with ViewFilterResource

use of org.structr.rest.resource.ViewFilterResource in project structr by structr.

the class ResourceHelper method parsePath.

// ~--- methods --------------------------------------------------------
/**
 * Parse the request path and match with possible resource patterns
 *
 * @param securityContext
 * @param request
 * @param resourceMap
 * @param propertyView
 * @return resourceChain
 * @throws FrameworkException
 */
public static List<Resource> parsePath(final SecurityContext securityContext, final HttpServletRequest request, final Map<Pattern, Class<? extends Resource>> resourceMap, final Value<String> propertyView) throws FrameworkException {
    final String path = request.getPathInfo();
    // intercept empty path and send 204 No Content
    if (StringUtils.isBlank(path)) {
        throw new NoResultsException("No content");
    }
    // 1.: split request path into URI parts
    final String[] pathParts = path.split("[/]+");
    // 2.: create container for resource constraints
    final Set<String> propertyViews = Services.getInstance().getConfigurationProvider().getPropertyViews();
    final List<Resource> resourceChain = new ArrayList<>(pathParts.length);
    // 3.: try to assign resource constraints for each URI part
    for (int i = 0; i < pathParts.length; i++) {
        // eliminate empty strings
        final String part = pathParts[i].trim();
        if (part.length() > 0) {
            boolean found = false;
            // check views first
            if (propertyViews.contains(part)) {
                Resource resource = new ViewFilterResource();
                resource.checkAndConfigure(part, securityContext, request);
                resource.configurePropertyView(propertyView);
                resourceChain.add(resource);
                // mark this part as successfully parsed
                found = true;
            } else {
                // look for matching pattern
                for (Map.Entry<Pattern, Class<? extends Resource>> entry : resourceMap.entrySet()) {
                    Pattern pattern = entry.getKey();
                    Matcher matcher = pattern.matcher(pathParts[i]);
                    if (matcher.matches()) {
                        Class<? extends Resource> type = entry.getValue();
                        Resource resource = null;
                        try {
                            // instantiate resource constraint
                            resource = type.newInstance();
                        } catch (Throwable t) {
                            logger.warn("Error instantiating resource class", t);
                        }
                        if (resource != null) {
                            // set security context
                            resource.setSecurityContext(securityContext);
                            if (resource.checkAndConfigure(part, securityContext, request)) {
                                logger.debug("{} matched, adding resource of type {} for part {}", new Object[] { matcher.pattern(), type.getName(), part });
                                // allow constraint to modify context
                                resource.configurePropertyView(propertyView);
                                // add constraint and go on
                                resourceChain.add(resource);
                                found = true;
                                // first match wins, so choose priority wisely ;)
                                break;
                            }
                        }
                    }
                }
            }
            if (!found) {
                throw new NotFoundException("Cannot resolve URL path");
            }
        }
    }
    return resourceChain;
}

Example 2 with ViewFilterResource

use of org.structr.rest.resource.ViewFilterResource in project structr by structr.

the class ResourceHelper method optimizeNestedResourceChain.

/**
 * Optimize the resource chain by trying to combine two resources to a new one
 *
 * @param securityContext
 * @param request
 * @param resourceMap
 * @param propertyView
 * @return finalResource
 * @throws FrameworkException
 */
public static Resource optimizeNestedResourceChain(final SecurityContext securityContext, final HttpServletRequest request, final Map<Pattern, Class<? extends Resource>> resourceMap, final Value<String> propertyView) throws FrameworkException {
    final List<Resource> resourceChain = ResourceHelper.parsePath(securityContext, request, resourceMap, propertyView);
    ViewFilterResource view = null;
    int num = resourceChain.size();
    boolean found = false;
    do {
        for (Iterator<Resource> it = resourceChain.iterator(); it.hasNext(); ) {
            Resource constr = it.next();
            if (constr instanceof ViewFilterResource) {
                view = (ViewFilterResource) constr;
                it.remove();
            }
        }
        found = false;
        try {
            for (int i = 0; i < num; i++) {
                Resource firstElement = resourceChain.get(i);
                Resource secondElement = resourceChain.get(i + 1);
                Resource combinedConstraint = firstElement.tryCombineWith(secondElement);
                if (combinedConstraint != null) {
                    // remove source constraints
                    resourceChain.remove(firstElement);
                    resourceChain.remove(secondElement);
                    // add combined constraint
                    resourceChain.add(i, combinedConstraint);
                    // signal success
                    found = true;
                }
            }
        } catch (Throwable t) {
        // ignore exceptions thrown here
        }
    } while (found);
    if (resourceChain.size() == 1) {
        Resource finalResource = resourceChain.get(0);
        if (view != null) {
            finalResource = finalResource.tryCombineWith(view);
        }
        if (finalResource == null) {
            // fall back to original resource
            finalResource = resourceChain.get(0);
        }
        return finalResource;
    } else {
        logger.warn("Resource chain evaluation for path {} resulted in {} entries, returning status code 400.", new Object[] { request.getPathInfo(), resourceChain.size() });
    }
    throw new IllegalPathException("Cannot resolve URL path");
}