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Posted to dev@jackrabbit.apache.org by Victor Giordano <vi...@globant.com> on 2012/07/16 20:51:28 UTC
Search by an inputstream property
Hi friends, i have a question about making a xpath expression for
filtering resources by a property of type inputStream called data.
How i can do a text search... for example... this is working:
String xpath1 = "<my app path>//element(*, nt:resource)
[jcr:contains(@jcr:mimeType,'*plain*')]";
String xpath2 = "<my app path>//element(*, nt:resource)
[jcr:contains(@jcr:encoding,'*utf*')]";
But this is not working....
String xpath3 = "<my app path>//element(*, nt:resource)
[jcr:contains(@jcr:data,'*plain*')]";
The really fact is that we use some custom nodes.. let's explain the
properties definitions:
In Java Terms...
|public class*Resource*extends BaseNode {
||
/** Encoding media type. It cannot be null or empty. */
@Field(jcrName = "jcr:encoding", jcrDefaultValue = "")
private String encoding;|
|
/** Resource's MIME type. It cannot be null or empty. */
@Field(jcrName="jcr:mimeType", jcrDefaultValue = "")
private String mimeType;
/** Resource's size (bytes). */
@Field(jcrName="skl:size")
private long size;
/** Resource's content data as stream. It cannot be null. */
@Field(jcrName="jcr:data")
private InputStream data;
...
}
||@Node(jcrType = "baseNode", isAbstract = true)
public abstract class*BaseNode*{
@Field(jcrName = "name", id = true)
protected String name;
@Field(jcrName = "creationDate")
protected Date creationDate;
...
}|
And in JackRabbit Terms...
<!-- Base node type definition -->
<nodeType *name="docs:baseNode"*
isMixin="false"
hasOrderableChildNodes="false" >
<supertypes>
<supertype>nt:hierarchyNode</supertype>
</supertypes>
<propertyDefinition name="docs:name"
requiredType="String"
autoCreated="false"
mandatory="true"
onParentVersion="COPY"
protected="false"
multiple="false" />
<propertyDefinition name="docs:searchPath"
requiredType="String"
autoCreated="false"
mandatory="false"
onParentVersion="COPY"
protected="false"
multiple="false" />
<propertyDefinition name="docs:creationDate"
requiredType="Date"
autoCreated="false"
mandatory="true"
onParentVersion="COPY"
protected="false"
multiple="false" />
<propertyDefinition name="docs:lastModified"
requiredType="Date"
autoCreated="false"
mandatory="true"
onParentVersion="COPY"
protected="false"
multiple="false" />
<childNodeDefinition name="*"
defaultPrimaryType="docs:baseNode"
autoCreated="false"
mandatory="false"
onParentVersion="COPY"
protected="false"
sameNameSiblings="false">
<requiredPrimaryTypes>
<requiredPrimaryType>docs:baseNode</requiredPrimaryType>
</requiredPrimaryTypes>
</childNodeDefinition>
</nodeType>
<!-- Resource node type definition -->
<nodeType *name="skl:resource"*
isMixin="false"
hasOrderableChildNodes="false" >
<supertypes>
<supertype>docs:baseNode</supertype>
<supertype>*nt:resource*</supertype>
</supertypes>
<propertyDefinition name="skl:size"
requiredType="Long"
autoCreated="false"
mandatory="true"
onParentVersion="COPY"
protected="false"
multiple="false" />
<propertyDefinition name="skl:externalUri"
requiredType="String"
autoCreated="false"
mandatory="false"
onParentVersion="COPY"
protected="false"
multiple="false" />
</nodeType>
The point is.. how i do this query... in order to filter by jcr:data
property...
Thanks for advance, and for reading this!
Greetings.
Victor.
Re: Search by an inputstream property
Posted by Victor Giordano <vi...@globant.com>.
Alex, thanks for your quick reply. I will have all of this in mind!!!.
We fixed these problem by adding a new property to the node, that
contains the text context, whose type is String. So we make the query
against that property. We use a custom text extractor (tika text
extractor), and we add the necessary code to populate the new property
when a file is uploaded.
Thanks again
Greeting
Victor
On 7/19/2012 4:09 PM, Alexander Klimetschek wrote:
> On 16.07.2012, at 20:51, Victor Giordano wrote:
>
>> Hi friends, i have a question about making a xpath expression for filtering resources by a property of type inputStream called data.
>> How i can do a text search... for example... this is working:
>>
>> String xpath1 = "<my app path>//element(*, nt:resource) [jcr:contains(@jcr:mimeType,'*plain*')]";
>> String xpath2 = "<my app path>//element(*, nt:resource) [jcr:contains(@jcr:encoding,'*utf*')]";
> FYI: jcr:contains() runs full text searches (with terms split up, word stemming etc.), so you don't need wildcards. Just use
>
> jcr:contains(@jcr:mimeType, 'plain')
>
> If you want real pattern-like matching (and highly-structured mime type or encoding values are probably better served by that), use jcr:like, which uses % as wildcard:
>
> jcr:like(@jcr:mimeType, '%plain')
>
> This should only match a value "text/plain" or "plain", but not "plain with a suffix".
>
>> But this is not working....
>> String xpath3 = "<my app path>//element(*, nt:resource) [jcr:contains(@jcr:data,'*plain*')]";
> The full text index for binary content is by default aggregated on the node itself, which you address with ".":
>
> //element(*, nt:resource) [jcr:contains(.,'plain')]
>
> The index configuration is documented here: http://wiki.apache.org/jackrabbit/IndexingConfiguration
>
> Cheers,
> Alex
>
Re: Search by an inputstream property
Posted by Alexander Klimetschek <ak...@adobe.com>.
On 16.07.2012, at 20:51, Victor Giordano wrote:
> Hi friends, i have a question about making a xpath expression for filtering resources by a property of type inputStream called data.
> How i can do a text search... for example... this is working:
>
> String xpath1 = "<my app path>//element(*, nt:resource) [jcr:contains(@jcr:mimeType,'*plain*')]";
> String xpath2 = "<my app path>//element(*, nt:resource) [jcr:contains(@jcr:encoding,'*utf*')]";
FYI: jcr:contains() runs full text searches (with terms split up, word stemming etc.), so you don't need wildcards. Just use
jcr:contains(@jcr:mimeType, 'plain')
If you want real pattern-like matching (and highly-structured mime type or encoding values are probably better served by that), use jcr:like, which uses % as wildcard:
jcr:like(@jcr:mimeType, '%plain')
This should only match a value "text/plain" or "plain", but not "plain with a suffix".
> But this is not working....
> String xpath3 = "<my app path>//element(*, nt:resource) [jcr:contains(@jcr:data,'*plain*')]";
The full text index for binary content is by default aggregated on the node itself, which you address with ".":
//element(*, nt:resource) [jcr:contains(.,'plain')]
The index configuration is documented here: http://wiki.apache.org/jackrabbit/IndexingConfiguration
Cheers,
Alex