Re: [Simple-support] had parsing working for strings, but now need to do so for ArrayList

[meghiddo <mat...@ho...>]

I resolved this on my own

In my measurementProject class I had declarations for devices, permissions,
and channels (the three that were giving me trouble) but I had them declared
as Strings instead of an ArrayList.  I changed that, and then I had one
other problem, but all I had to do was change my properties field from
required=true to required=false, and it worked immediately.

The way I figred it out was, I just played around with that readXml method,
by erasing methods that came after a period,
Then I would hit the period so it would pop up with the list of all possible
methods, along with descriptions of what they did, and I read through those. 
In doing so I got a better understanding of how simplexml works, and then
the idea just came to me (after reading through a few more lines in the
stack).



meghiddo wrote:
> 
> I had code working that took data from a web service, parsed it, and
> loaded the values into a list that I could use in a rich:tree.  This was
> working just fine when it took the data from this xml:
> 
> [code]   <?xml version="1.0" encoding="UTF-8" ?> 
> - <deviceCollection>
> - <device>
>   <deviceId>exampleDevice1</deviceId> 
>   <name>Example Device 1</name> 
>   </device>
> - <device>
>   <deviceId>WSN-Module-8F3A-D247-4B99</deviceId> 
>   <name>WSN CRio Device</name> 
>   </device>
>   </deviceCollection>  [/code]
> 
> But now I need to convert it to take the data from a different xml set up
> that looks like this:
> 
> [code] - <measurementProject>
>   <projectId>1</projectId> 
>   <name>matt</name> 
>   <permissions class="java.util.ArrayList" /> 
>   <devices class="java.util.ArrayList" /> 
>   <channels class="java.util.ArrayList" /> 
>   </measurementProject>   [/code]
> 
> But when I did so I get this exception:
> 
> [code]org.simpleframework.xml.core.InstantiationException: Type class
> java.util.ArrayList is not compatible with class java.lang.String
> 	at org.simpleframework.xml.core.Factory.getOverride(Factory.java:105)
> 	at
> org.simpleframework.xml.core.PrimitiveFactory.getInstance(PrimitiveFactory.java:66)
> 	at org.simpleframework.xml.core.Primitive.readElement(Primitive.java:181)
> 	at org.simpleframework.xml.core.Primitive.read(Primitive.java:119)
> 	at org.simpleframework.xml.core.Composite.readObject(Composite.java:520)
> 	at org.simpleframework.xml.core.Composite.read(Composite.java:477)
> 	at org.simpleframework.xml.core.Composite.readElement(Composite.java:458)
> 	at
> org.simpleframework.xml.core.Composite.readElements(Composite.java:374)
> 	at org.simpleframework.xml.core.Composite.read(Composite.java:259)
> 	at org.simpleframework.xml.core.Composite.read(Composite.java:204)
> 	at org.simpleframework.xml.core.Composite.read(Composite.java:158)
> 	at org.simpleframework.xml.core.Composite.read(Composite.java:135)
> 	at org.simpleframework.xml.core.Traverser.read(Traverser.java:78)
> 	at
> org.simpleframework.xml.core.CompositeInlineList.read(CompositeInlineList.java:182)
> 	at
> org.simpleframework.xml.core.CompositeInlineList.read(CompositeInlineList.java:159)
> 	at
> org.simpleframework.xml.core.CompositeInlineList.read(CompositeInlineList.java:117)
> 	at org.simpleframework.xml.core.Composite.readObject(Composite.java:520)
> 	at org.simpleframework.xml.core.Composite.read(Composite.java:477)
> 	at org.simpleframework.xml.core.Composite.readElement(Composite.java:458)
> 	at
> org.simpleframework.xml.core.Composite.readElements(Composite.java:374)
> 	at org.simpleframework.xml.core.Composite.read(Composite.java:259)
> 	at org.simpleframework.xml.core.Composite.read(Composite.java:204)
> 	at org.simpleframework.xml.core.Composite.read(Composite.java:158)
> 	at org.simpleframework.xml.core.Composite.read(Composite.java:135)
> 	at org.simpleframework.xml.core.Traverser.read(Traverser.java:78)
> 	at org.simpleframework.xml.core.Persister.read(Persister.java:544)
> 	at org.simpleframework.xml.core.Persister.read(Persister.java:526)
> 	at org.simpleframework.xml.core.Persister.read(Persister.java:507)
> 	at org.simpleframework.xml.core.Persister.read(Persister.java:489)
> 	at org.simpleframework.xml.core.Persister.read(Persister.java:471)
> 	at org.simpleframework.xml.core.Persister.read(Persister.java:452)
> 	at
> projectContainer.MeasurementProjectCollectionXMLAO.readXML(MeasurementProjectCollectionXMLAO.java:17)
> 	at
> testContainer.ProjectTreeTest.loadProjectNodes(ProjectTreeTest.java:34)
> 	at testContainer.TempMain.main(TempMain.java:11)    [/code]
> 
> So it is obvious that ther is a problem with parsing this new xml due to
> the fact it has these three lines:
> 
> [code]   <permissions class="java.util.ArrayList" /> 
>   <devices class="java.util.ArrayList" /> 
>   <channels class="java.util.ArrayList" /> 
>      [/code]
> 
> Things were fine when it was only parsing Strings, but there is a problem
> with the parsing of the ArrayLists.
> I'm not sure where to look to find the problem and how to solve it
> honestly.
> If I were to guess I would say there will need to be a change made to:
> 
> [code]public class MeasurementProjectCollectionXMLAO {
> 
> 	public MeasurementProjectCollection readXML(InputStream xml) { 
> 	    Serializer serializer = new Persister(); 
> 
> 	    MeasurementProjectCollection measurementProjectCollection = null; 
> 	    try {
> 			measurementProjectCollection =
> serializer.read(MeasurementProjectCollection.class, xml);
> 		} catch (Exception e) {
> 			// TODO Auto-generated catch block
> 			e.printStackTrace();
> 		} 
> 	    try {
> 			xml.close();
> 		} catch (IOException e) {
> 			// TODO Auto-generated catch block
> 			e.printStackTrace();
> 		}
> 	    return measurementProjectCollection; 
> 	}     [/code]
> 
> 
> But I really do not know where.  If it is any help, here is the class that
> calls the xml parser, and then loads the values to a list.  
> 
> 
> [code]public void loadProjectNodes() {
> 				
> 		MeasurementProjectCollectionXMLAO access = new
> MeasurementProjectCollectionXMLAO();
> 		ProjectHttpClient method = new ProjectHttpClient();
>         MeasurementProjectCollection measurementProjectCollection = null;
>    
> 
> 			try {
> 				measurementProjectCollection = access.readXML(method.Response(null));
> 			} catch (Exception e) {
> 				// TODO Auto-generated catch block
> 				e.printStackTrace();
> 			}
> 
> 
> 		//System.out.println("printing deviceCollection =
> access.readXML(method.getResponseBodyAsStream(null));: " 
> 				//+ deviceCollection.toString());        
> 		
> 		for (MeasurementProject measurementProject :
> measurementProjectCollection.getMeasurementProjects()){   
> 		    String x = measurementProject.getName();   
> 		    projectNameList.add(x); 
> 		    //System.out.println(ids);
> 		}		
> 		
> 	}
> 
> 	public List&lt;String&gt; getProjectNameList() {
> 		//loadNodes();
> 		return projectNameList;
> 	}
> 
> 	public void setProjectnameList(List&lt;String&gt; projectNameList) {
> 		this.projectNameList = projectNameList;
> 	}
> 
> 	public void print(){
> 		System.out.println("Printing projectNameList values: "+projectNameList);
> 	}
> }    [/code]
> 
> As soon as I try to call loadProjectNodes I get that exception though.
> 
> I have to get this working by Tuesday.  May seem like plenty of time but
> with my track record on these kind of things...
> 

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