检索并将 `jcr:mixinTypes` 赋值为多值属性在 Magnolia 中。

huangapple
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英文:

Retrieve and assign jcr:mixinTypes a multi-valued property in magnolia

问题

我在尝试获取Magnolia中的多值属性时遇到错误，因为我将其分配给了String类型。我应该如何正确读取单值和多值属性（因为两者都存在）？

> javax.jcr.ValueFormatException：属性
> /wcmstest/de/search/jcr:mixinTypes是多值属性，因此其值只能作为数组检索
> at org.apache.jackrabbit.core.PropertyImpl.internalGetValue(PropertyImpl.java:483)
> at org.apache.jackrabbit.core.PropertyImpl.getValue(PropertyImpl.java:510)
> at org.apache.jackrabbit.core.PropertyImpl.getString(PropertyImpl.java:520)
> at info.magnolia.jcr.wrapper.DelegatePropertyWrapper.getString(DelegatePropertyWrapper.java:162)
> at info.magnolia.jcr.wrapper.DelegatePropertyWrapper.getString(DelegatePropertyWrapper.java:162)
> at info.magnolia.jcr.wrapper.DelegatePropertyWrapper.getString(DelegatePropertyWrapper.java:162)
> at info.magnolia.jcr.wrapper.DelegatePropertyWrapper.getString(DelegatePropertyWrapper.java:162)
> at info.magnolia.jcr.wrapper.DelegatePropertyWrapper.getString(DelegatePropertyWrapper.java:162)
> at ch.uzh.module.versioning.CreateNestedMap.nestedMap(CreateNestedMap.java:32)
> at ch.uzh.module.versioning.ContextLoggerCommand.execute(ContextLoggerCommand.java:78)
> at info.magnolia.commands.MgnlCommand.executeSynchronized(MgnlCommand.java:80)
> at info.magnolia.commands.MgnlCommand.execute(MgnlCommand.java:69)
> at info.magnolia.commands.chain.ChainBase.execute(ChainBase.java:101)
> at info.magnolia.commands.DelegateCommand.execute(DelegateCommand.java:66):

这是我正在使用的代码：

  1. HashMap<String, Object> map = new LinkedHashMap<>();
  2. PropertyIterator pi;
  3. try {
  4.     pi = node.getProperties();
  5.     // 获取根节点的属性
  6.     while (pi.hasNext()) {
  7.         Property p = pi.nextProperty();
  8.         String name = p.getName();
  9.         String val = p.getString();
  11.         map.put(name, val);
  12.     } // 结束根节点属性的循环
  13. } catch (RepositoryException e) {
  14.     // TODO Auto-generated catch block
  15.     e.printStackTrace();
  16. }
英文:

I am getting an error when I try to get a multi-valued property in magnolia since I assign it to a String type. How can I properly read a single and multi-valued property (since both are present)?

> javax.jcr.ValueFormatException: property
> /wcmstest/de/search/jcr:mixinTypes is a multi-valued property, so it's
> values can only be retrieved as an array
> at org.apache.jackrabbit.core.PropertyImpl.internalGetValue(PropertyImpl.java:483)
> at org.apache.jackrabbit.core.PropertyImpl.getValue(PropertyImpl.java:510)
> at org.apache.jackrabbit.core.PropertyImpl.getString(PropertyImpl.java:520)
> at info.magnolia.jcr.wrapper.DelegatePropertyWrapper.getString(DelegatePropertyWrapper.java:162)
> at info.magnolia.jcr.wrapper.DelegatePropertyWrapper.getString(DelegatePropertyWrapper.java:162)
> at info.magnolia.jcr.wrapper.DelegatePropertyWrapper.getString(DelegatePropertyWrapper.java:162)
> at info.magnolia.jcr.wrapper.DelegatePropertyWrapper.getString(DelegatePropertyWrapper.java:162)
> at info.magnolia.jcr.wrapper.DelegatePropertyWrapper.getString(DelegatePropertyWrapper.java:162)
> at ch.uzh.module.versioning.CreateNestedMap.nestedMap(CreateNestedMap.java:32)
> at ch.uzh.module.versioning.ContextLoggerCommand.execute(ContextLoggerCommand.java:78)
> at info.magnolia.commands.MgnlCommand.executeSynchronized(MgnlCommand.java:80)
> at info.magnolia.commands.MgnlCommand.execute(MgnlCommand.java:69)
> at info.magnolia.commands.chain.ChainBase.execute(ChainBase.java:101)
> at info.magnolia.commands.DelegateCommand.execute(DelegateCommand.java:66)
> :

This is the code I am using:

  1.  HashMap&lt;String, Object&gt; map = new LinkedHashMap&lt;&gt;();
  2.  PropertyIterator pi;
  3.  try {
  4. 	pi = node.getProperties();
  5. 	//Get properties for the root node
  6.     while(pi.hasNext())
  7. 	{
  8.         Property p = pi.nextProperty();
  9. 		String name = p.getName();
  10. 		String val = p.getString();
  11. 					  
  12. 		map.put(name,val);
  13. 			  
  14. 	}//end of while for properties of root node
  15.  } catch (RepositoryException e) {
  16. 		// TODO Auto-generated catch block
  17. 		e.printStackTrace();
  18.  }

答案1

得分: 1

感谢 @reporter 和一些尝试和错误。这里是一个可行的解决方案。

  1. HashMap<String, Object> map = new LinkedHashMap<>();
  2.    
  3. PropertyIterator pi;
  4. try {
  5.     pi = node.getProperties();
  6.     //获取根节点的属性
  7.     while(pi.hasNext()) {
  8.        Property p = pi.nextProperty();
  9.        String name = p.getName();
  10.        String val;
  11.        //确定属性是否为多值
  12.        if (p.isMultiple()) {
  13.             //多值属性		     
  14.             val = p.getValues().toString();
  15.             
  16.         } else {
  17.             //单值属性
  18.             val = p.getValue().getString();
  19.             
  20.         }
  21.         map.put(name, val);
  22.       
  23.     }//结束根节点属性的循环
  24. } catch (RepositoryException e) {
  25.     // TODO Auto-generated catch block
  26.     e.printStackTrace();
  27. }
英文:

Thanks to @reporter and some trial and error. Here is a working solution.

  1.            HashMap&lt;String, Object&gt; map = new LinkedHashMap&lt;&gt;();
  2. 		   
  3. 		   PropertyIterator pi;
  4. 			try {
  5. 				pi = node.getProperties();
  6. 				//Get properties for the root node
  7. 				while(pi.hasNext())
  8. 					{
  9. 					   Property p = pi.nextProperty();
  10. 					   String name = p.getName();
  11. 					   String val;
  12. 					   //determine if property is multi-value
  13. 					   if (p.isMultiple()) {
  14. 						    //multi-value property		     
  15. 						    val=p.getValues().toString();
  16. 						    
  17. 						} else {
  18. 							//single-value property
  19. 							val = p.getValue().getString();
  20. 							
  21. 						}
  22. 					    map.put(name,val);
  23. 					  
  24. 					}//end of while for properties of root node
  25. 			} catch (RepositoryException e) {
  26. 				// TODO Auto-generated catch block
  27. 				e.printStackTrace();
  28. 			}

huangapple
  • 本文由 发表于 2020年1月30日 18:28:00
  • 转载请务必保留本文链接：https://go.coder-hub.com/59983882.html
  • java
  • jcr
  • magnolia
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