java - AEM 6.1 : Get all 'parsys' and 'iparsys' components of the page

Question

我有一个页面路径(例如/content/my-site/en/cars)，并且我需要此页面上以 java 代码表示的所有“parsys”和“iparsys”组件的列表。有什么方法可以做到吗？感谢您的帮助。

Answer 1

我假设您正在尝试 Sling model或WCMUsePOJO读取页面的内部节点。这里是技巧:

1. 如果您不知道存在多少个 parsys 节点:这不是理想情况，因为页面渲染脚本规定了所有包含的 parsys 和 iparsys。但以防万一，您将像这样运行 sling:resourceType 查询:

Iterator<Resource> parsysResources = resourceResolver.findResources("/jcr:root/content/my-site/en/cars//*[sling:resourceType='foundation/components/parsys']", Query.XPATH);
Iterator<Resource> iparsysResources = resourceResolver.findResources("/jcr:root/content/my-site/en/cars//*[sling:resourceType='foundation/components/iparsys']", Query.XPATH);

类似的查询，但使用查询构建器(推荐):建议使用查询构建器 API，以提高 future 的可读性和可扩展性。

List<Resource> parsysIpaysysResources = new ArrayList<>();
Map<String, String> predicateMap = new HashMap<>();
predicateMap.put("path", "/content/my-site/en/cars");
predicateMap.put("1_property", "sling:resourceType");
predicateMap.put("1_property.value", "foundation/components/parsys");
predicateMap.put("2_property", "sling:resourceType");
predicateMap.put("2_property.value", "foundation/components/iparsys");
predicateMap.put("p.limit", "-1");

QueryBuilder queryBuilder = resourceResolver.adaptTo(QueryBuilder.class);
Session session = resourceResolver.adaptTo(Session.class);
com.day.cq.search.Query query = queryBuilder.createQuery(PredicateGroup.create(predicateMap), session);
SearchResult result = query.getResult();
Iterator<Resource> resources = result.getResources();
while (resources.hasNext()) {
    parsysIpaysysResources.add(resources.next());
}

如果已知 parsys 节点是页面内容的直接子节点，则与查询相比，listChildren 的成本会更低。

Page pageContent = pageManager.getContainingPage("/content/my-site/en/cars");
        Iterator<Resource> children = pageContent.getContentResource().listChildren();
        while(children != null && children.hasNext()) {
            Resource child = children.next();
            if(child.isResourceType("foundation/components/parsys") || child.isResourceType("foundation/components/iparsys")) {
                // do something
            }
        }

如果知道内部 parsys 的节点名称，则可以利用 JCR API

Page pageContent = pageManager.getContainingPage("/content/my-site/en/cars");
    Node pageContentNode  = pageContent.adaptTo(Node.class);
    try {
        NodeIterator nodeIter = pageContentNode.getNodes("parsys*");
        // iterate nodes
    } catch (RepositoryException e) {
        e.printStackTrace();
    }