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Re: [Exist-development] Question on building an XML document in memory under Java
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From: Loren C. <lor...@gm...> - 2011-05-03 18:34:41
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I am trying a task where I create an empty memtree document and then try to update the dom document. It is hanging on line 145
Node newNode = doc.createElement(columnNames[index]);
Can someone take a look at the attached source?
Thank you,
Loren
03 May 2011 13:08:07,042 [DefaultQuartzScheduler_Worker-2] DEBUG (TestMemtreeJob.java [execute]:107) - context: org.exist.xquery.XQueryContext@36633b88
03 May 2011 13:08:07,042 [DefaultQuartzScheduler_Worker-2] DEBUG (TestMemtreeJob.java [execute]:110) - builder: org.exist.memtree.MemTreeBuilder@2cd9799d
03 May 2011 13:08:07,042 [DefaultQuartzScheduler_Worker-2] DEBUG (TestMemtreeJob.java [execute]:122) - Storing memtree document /db/test-update.xml
03 May 2011 13:08:07,042 [DefaultQuartzScheduler_Worker-2] DEBUG (TestMemtreeJob.java [storeMemtreeDocument]:177) - ===========================================================================
03 May 2011 13:08:07,042 [DefaultQuartzScheduler_Worker-2] DEBUG (TestMemtreeJob.java [storeMemtreeDocument]:178) - ===========================================================================
03 May 2011 13:08:07,043 [DefaultQuartzScheduler_Worker-2] DEBUG (TestMemtreeJob.java [storeMemtreeDocument]:179) - ===========================================================================
03 May 2011 13:08:07,043 [DefaultQuartzScheduler_Worker-2] DEBUG (TestMemtreeJob.java [storeMemtreeDocument]:180) - ===========================================================================
03 May 2011 13:08:07,043 [DefaultQuartzScheduler_Worker-2] DEBUG (TestMemtreeJob.java [storeMemtreeDocument]:181) - ===========================================================================
03 May 2011 13:08:07,043 [DefaultQuartzScheduler_Worker-2] DEBUG (TestMemtreeJob.java [storeMemtreeDocument]:182) - Attempting to create document: /db/test-update.xml
03 May 2011 13:08:07,043 [DefaultQuartzScheduler_Worker-2] DEBUG (TestMemtreeJob.java [storeMemtreeDocument]:200) - collectionURI: /db
03 May 2011 13:08:07,043 [DefaultQuartzScheduler_Worker-2] DEBUG (TestMemtreeJob.java [storeMemtreeDocument]:202) - docURI: test-update.xml
03 May 2011 13:08:07,043 [DefaultQuartzScheduler_Worker-2] DEBUG (TestMemtreeJob.java [storeMemtreeDocument]:210) - collection: /db[test-update.xml]
03 May 2011 13:08:07,050 [DefaultQuartzScheduler_Worker-2] INFO (TestMemtreeJob.java [storeMemtreeDocument]:220) - INFO: org.exist.collections.IndexInfo@68ffab0a
03 May 2011 13:08:07,051 [DefaultQuartzScheduler_Worker-2] DEBUG (TestMemtreeJob.java [storeMemtreeDocument]:252) - ===========================================================================
03 May 2011 13:08:07,051 [DefaultQuartzScheduler_Worker-2] DEBUG (TestMemtreeJob.java [storeMemtreeDocument]:253) - ===========================================================================
03 May 2011 13:08:07,051 [DefaultQuartzScheduler_Worker-2] DEBUG (TestMemtreeJob.java [storeMemtreeDocument]:254) - ===========================================================================
03 May 2011 13:08:07,051 [DefaultQuartzScheduler_Worker-2] DEBUG (TestMemtreeJob.java [storeMemtreeDocument]:255) - ===========================================================================
03 May 2011 13:08:07,051 [DefaultQuartzScheduler_Worker-2] DEBUG (TestMemtreeJob.java [storeMemtreeDocument]:256) - ===========================================================================
03 May 2011 13:08:07,051 [DefaultQuartzScheduler_Worker-2] DEBUG (TestMemtreeJob.java [execute]:124) - stored
03 May 2011 13:08:07,051 [DefaultQuartzScheduler_Worker-2] DEBUG (TestMemtreeJob.java [execute]:130) - End waiting
03 May 2011 13:08:07,051 [DefaultQuartzScheduler_Worker-2] DEBUG (TestMemtreeJob.java [execute]:133) - Found element result : <result xmlns="..." timestamp="2011-05-03T13:08:07-0500"></result>
03 May 2011 13:08:07,051 [DefaultQuartzScheduler_Worker-2] DEBUG (TestMemtreeJob.java [execute]:136) - node names: [Ljava.lang.String;@6d9bf996
03 May 2011 13:08:07,051 [DefaultQuartzScheduler_Worker-2] DEBUG (TestMemtreeJob.java [getChildNode]:162) - Looking for node a
03 May 2011 13:08:07,051 [DefaultQuartzScheduler_Worker-2] DEBUG (TestMemtreeJob.java [getChildNode]:165) - Testing [timestamp] [a]
03 May 2011 13:08:07,052 [DefaultQuartzScheduler_Worker-2] DEBUG (TestMemtreeJob.java [getChildNode]:171) - did not find it
03 May 2011 13:08:07,052 [DefaultQuartzScheduler_Worker-2] DEBUG (TestMemtreeJob.java [execute]:144) - Creating node a for result
On May 2, 2011, at 3:25 PM, Loren Cahlander wrote:
> I am in the process of building a document in memory that I am not in control of the order that the nodes to be added are coming, but want to create the document as simply as possible.
>
> The following is an example of the steps that would be received:
>
> Create document with root node 'item'
> Add node /item/one
> Add node /item/two/alpha
> Add node /item/three
> Add node /item/two/beta
> Add complex node /item/four/a
> Add another complex node /item/four/a
>
> Below are the steps as they should be in the document:
>
> <?xml version="1.0" encoding="UTF-8"?>
> <item/>
>
> <?xml version="1.0" encoding="UTF-8"?>
> <item>
> <one>foo</one>
> </item>
>
> <?xml version="1.0" encoding="UTF-8"?>
> <item>
> <one>foo</one>
> <two>
> <alpha>bar</alpha>
> </two>
> </item>
>
> <?xml version="1.0" encoding="UTF-8"?>
> <item>
> <one>foo</one>
> <two>
> <alpha>bar</alpha>
> </two>
> <three>qwerty</three>
> </item>
>
> <?xml version="1.0" encoding="UTF-8"?>
> <item>
> <one>foo</one>
> <two>
> <alpha>bar</alpha>
> <beta>1234</beta>
> </two>
> <three>qwerty</three>
> </item>
>
> <?xml version="1.0" encoding="UTF-8"?>
> <item>
> <one>foo</one>
> <two>
> <alpha>bar</alpha>
> <beta>1234</beta>
> </two>
> <three>qwerty</three>
> <four>
> <a>
> <p1>11</p1>
> <p2>12</p2>
> <p3>13</p3>
> <p4>14</p4>
> <p5>15</p5>
> <p6>16</p6>
> <p7>17</p7>
> <p8>18</p8>
> </a>
> <a>
> <p1>21</p1>
> <p2>22</p2>
> <p3>23</p3>
> <p4>24</p4>
> <p5>25</p5>
> <p6>26</p6>
> <p7>27</p7>
> <p8>28</p8>
> </a>
> </four>
> </item>
>
>
>
> I figure that I need to create a memtree document with the following:
>
> MemTreeBuilder builder = null;
> XQuery xquery = broker.getXQueryService();
>
> if (xquery == null) {
> LOG.error("broker unable to retrieve XQueryService");
> return null;
> }
> XQueryContext context = xquery.newContext(AccessContext.REST);
>
> builder = new MemTreeBuilder( context );
>
> builder.startDocument();
> builder.startElement( new QName( "item", null, null ), null );
> builder.endElement();
> builder.endDocument();
> DocumentImpl document = builder.getDocument();
>
> I would then use XUpdate to build the node structures in the steps as I showed above. How would I best implement the XUpdate?
>
> Thanks,
> Loren
>
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