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https://issues.apache.org/jira/browse/AXIOM-478?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15106391#comment-15106391
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LU Jie commented on AXIOM-478:
------------------------------
Hi Andreas,
I have another problem need you help.
After I got the large content this getTextAsStream(), I continued to loop the
child elements to get other field. But I got OMException like this:
Exception in thread "main" org.apache.axiom.om.OMException: The builder has
already been closed
at
org.apache.axiom.core.CoreParentNodeSupport.ajc$interMethod$org_apache_axiom_core_CoreParentNodeSupport$org_apache_axiom_core_CoreParentNode$buildNext(CoreParentNodeSupport.aj:94)
at
org.apache.axiom.om.impl.llom.OMElementImpl.buildNext(OMElementImpl.java:1)
at
org.apache.axiom.core.CoreParentNodeSupport.ajc$interMethodDispatch1$org_apache_axiom_core_CoreParentNodeSupport$org_apache_axiom_core_CoreParentNode$buildNext(CoreParentNodeSupport.aj)
at
org.apache.axiom.core.CoreChildNodeSupport.ajc$interMethod$org_apache_axiom_core_CoreChildNodeSupport$org_apache_axiom_core_CoreChildNode$coreGetNextSibling(CoreChildNodeSupport.aj:115)
at
org.apache.axiom.om.impl.llom.OMNodeImpl.coreGetNextSibling(OMNodeImpl.java:1)
at
org.apache.axiom.om.impl.common.AxiomChildNodeSupport.ajc$interMethod$org_apache_axiom_om_impl_common_AxiomChildNodeSupport$org_apache_axiom_om_impl_intf_AxiomChildNode$getNextOMSibling(AxiomChildNodeSupport.aj:35)
at
org.apache.axiom.om.impl.llom.OMNodeImpl.getNextOMSibling(OMNodeImpl.java:1)
at
org.apache.axiom.om.impl.traverse.OMChildrenIterator.getNextNode(OMChildrenIterator.java:36)
at
org.apache.axiom.om.impl.traverse.OMAbstractIterator.hasNext(OMAbstractIterator.java:69)
at
org.apache.axiom.om.impl.traverse.OMFilterIterator.hasNext(OMFilterIterator.java:54)
......
Seems the builder was closed after getTextAsStream(). Is there a way to
continue getting the remainder elements?
> Solution for parsing large XML
> ------------------------------
>
> Key: AXIOM-478
> URL: https://issues.apache.org/jira/browse/AXIOM-478
> Project: Axiom
> Issue Type: Question
> Reporter: LU Jie
>
> This is LU Jie from IBM. We use axiom to parse Atom in our project.
> One of our CMIS API will attach file content to the XML. If the file size is
> large, we will get a large atom.
> If we use Entry.getExtension(QName) to parse the content, it will allocate a
> large memory(around 5-6 times of the file size).
> We need you help to clarify if we can use DOM-like API of axiom to get the
> text of a certain element as stream. That is without allocating a large
> object in memory.
> Or is there an alternative solution for this use case?
> We DO know that we can use pull-parser to parse the XML as stream. But we
> need help to investigate if axiom has already provided an API or solution to
> avoid writing parser by ourselves.
> Here's the sample XML. We need to parse the text of cmisra:base64 element:
> {noformat}
> <atom:entry
> xmlns:atom="http://www.w3.org/2005/Atom";
> xmlns:cmisra="http://docs.oasis-open.org/ns/cmis/restatom/200908/";
> xmlns:chemistry="http://chemistry.apache.org/";
> xmlns:cmis="http://docs.oasis-open.org/ns/cmis/core/200908/";>
> <atom:id
>
> xmlns:atom="http://www.w3.org/2005/Atom";>urn:uuid:00000000-0000-0000-0000-00000000000
> </atom:id>
> <atom:title
> xmlns:atom="http://www.w3.org/2005/Atom";
> type="text">doucment1446016556658.txt
> </atom:title>
> <atom:updated
> xmlns:atom="http://www.w3.org/2005/Atom";>2015-10-28T07:15:57.594Z
> </atom:updated>
> <cmisra:content
> xmlns:cmisra="http://docs.oasis-open.org/ns/cmis/restatom/200908/";>
> <cmisra:mediatype
>
> xmlns:cmisra="http://docs.oasis-open.org/ns/cmis/restatom/200908/";>text/plain
> </cmisra:mediatype>
> <chemistry:filename
>
> xmlns:chemistry="http://chemistry.apache.org/";>doucment1446016556658.txt
> </chemistry:filename>
> <cmisra:base64
>
> xmlns:cmisra="http://docs.oasis-open.org/ns/cmis/restatom/200908/";>Base64
> encoded content of large file
> </cmisra:base64>
> </cmisra:content>
> <cmisra:object
> xmlns:cmisra="http://docs.oasis-open.org/ns/cmis/restatom/200908/";>
> <cmis:properties
> xmlns:cmis="http://docs.oasis-open.org/ns/cmis/core/200908/";>
> <cmis:propertyId
> xmlns:cmis="http://docs.oasis-open.org/ns/cmis/core/200908/";
> propertyDefinitionId="cmis:objectTypeId">
> <cmis:value
>
> xmlns:cmis="http://docs.oasis-open.org/ns/cmis/core/200908/";>snx:file
> </cmis:value>
> </cmis:propertyId>
> <cmis:propertyString
> xmlns:cmis="http://docs.oasis-open.org/ns/cmis/core/200908/";
> propertyDefinitionId="cmis:name">
> <cmis:value
>
> xmlns:cmis="http://docs.oasis-open.org/ns/cmis/core/200908/";>doucment1446016556658.txt
> </cmis:value>
> </cmis:propertyString>
> </cmis:properties>
> </cmisra:object>
> </atom:entry>
> {noformat}
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