Java JCR SQL2查询显然没有提供任何结果
我正在尝试基于JCRAPI为CQ创建一个页面。我想查询属性中包含特定字符串的页面 查询本身(JCR-SQL2)如下所示(我在CQ Web界面上对其进行了测试,并提供了结果): 这是我在JSP页面中的尝试:Java JCR SQL2查询显然没有提供任何结果,java,aem,jcr,jcr-sql2,Java,Aem,Jcr,Jcr Sql2,我正在尝试基于JCRAPI为CQ创建一个页面。我想查询属性中包含特定字符串的页面 查询本身(JCR-SQL2)如下所示(我在CQ Web界面上对其进行了测试,并提供了结果): 这是我在JSP页面中的尝试: String stmt = "SELECT * FROM [nt:base] AS s WHERE ISDESCENDANTNODE([/content]) AND s.[cq:template] = 'some/path/to/destination'"; Query que
String stmt = "SELECT * FROM [nt:base] AS s WHERE ISDESCENDANTNODE([/content]) AND s.[cq:template] = 'some/path/to/destination'";
Query query = currentNode.getSession().getWorkspace().getQueryManager().createQuery(stmt, Query.JCR_SQL2);
QueryResult results = query.execute();
if (results.getNodes() != null && results.getNodes().hasNext()) {
NodeIterator it = results.getNodes();
while (it.hasNext()) {
Node node = it.nextNode();
String npath = node.getPath();
Page contentPage = pageManager.getContainingPage(resourceResolver.getResource(npath));
String title = contentPage.getTitle();
String path = contentPage.getPath() + ".html";
%>
<div class="searchresult"><a href="<%= path %>"><%= title %></a></div>
<%
}
}
这不是因为您创建了两次迭代器: 首先
if(results.getNodes()!=null&&results.getNodes().hasNext()){
然后
NodeIterator it=results.getNodes();
我只会尝试这样创建一次:
QueryResult results = query.execute();
NodeIterator it = results.getNodes();
if (it.hasNext()) {
...
}
查看SimpleQueryResult的源代码,它做了一些奇怪的事情,实例变量rowIterator被设置为null,因此下次调用getRows时,您将转到条件的其他部分,您将遇到您提到的错误:
public synchronized RowIterator getRows() throws RepositoryException {
if (rowIterator != null) {
RowIterator iterator = rowIterator;
rowIterator = null;
return iterator;
} else {
throw new RepositoryException(
"This query result has already been iterated through");
}
}
这不是因为您创建了两次迭代器: 首先
if(results.getNodes()!=null&&results.getNodes().hasNext()){
然后
NodeIterator it=results.getNodes();
我只会尝试这样创建一次:
QueryResult results = query.execute();
NodeIterator it = results.getNodes();
if (it.hasNext()) {
...
}
查看SimpleQueryResult的源代码,它做了一些奇怪的事情,实例变量rowIterator被设置为null,因此下次调用getRows时,您将转到条件的其他部分,您将遇到您提到的错误:
public synchronized RowIterator getRows() throws RepositoryException {
if (rowIterator != null) {
RowIterator iterator = rowIterator;
rowIterator = null;
return iterator;
} else {
throw new RepositoryException(
"This query result has already been iterated through");
}
}