Ok actually Strings() returns the String[] array that has the contents and
that solved my problem.
Thanks again Costin! :)
Le mercredi 3 décembre 2014 16:29:38 UTC+1, Elias Abou Haydar a écrit :
>
> I've tried to call toStrings()
> I got this :
> title : [Ljava.lang.String;@35112ff7
>
> with the get(), i'm getting this:
> title : [Lorg.apache.hadoop.io.Writable;@666f5678
>
> Le mercredi 3 décembre 2014 16:21:40 UTC+1, Costin Leau a écrit :
>>
>> You're getting back an array ([Samsung EF-C....]) - a Writable wrapper
>> around org.hadoop.io.ArrayWritable (to actually
>> allow it to be serialized).
>> So call toStrings() or get() to get its content.
>>
>>
>> On 12/3/14 3:30 PM, Elias Abou Haydar wrote:
>> > I've tried that. It returns a
>> org.elasticsearch.hadoop.mr.WritableArrayWritable object. How can I get my
>> field content
>> > out of that?
>> >
>> > Le mercredi 3 décembre 2014 14:10:24 UTC+1, Costin Leau a écrit :
>> >
>> > That's because your MapWritables doesn't use Strings as keys but
>> rather org.apache.hadoop.io.Text
>> > In other words, you can see the data is in the map however you
>> cannot retrieve it since you are using the wrong key
>> > (try
>> > inspecting the map object types).
>> >
>> > Try values.get(new Text("title"))
>> >
>> >
>> > On 12/3/14 3:04 PM, Elias Abou Haydar wrote:
>> > > That works fine for me thank you! But I'd also wanted to be able
>> to build and object from the MapWritable values in the
>> > > mapper.
>> > >
>> > > Consider values as MapWritable object.
>> > > When I try to get a specified value from values.get("title") per
>> example the returning value is null but the field
>> > > exists in the values.keySet()
>> > >
>> > > Considering the following code :
>> > >
>> > > System.out.println(values.keySet());
>> > > System.out.println(values.toString());
>> > > System.out.println("title : " + values.get("title"));
>> > > System.out.println("category : " + values.get("category"));
>> > >
>> > > This is a snippet from the debug output :
>> > >
>> > > [title, categoryId]
>> > > {title=[Samsung EF-CI950BCEGWW S View], categoryId=[3485]}
>> > > title : null
>> > > category : null
>> > >
>> > > Thanks again!
>> > >
>> > > Le mardi 2 décembre 2014 12:36:57 UTC+1, Costin Leau a écrit :
>> > >
>> > > Simply specify the fields that you are interested in, in the
>> query and you are good to go.
>> > >
>> > > [1]
>> http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-request-fields.html
>>
>> > <
>> http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-request-fields.html>
>>
>>
>> > > <
>> http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-request-fields.html
>>
>> > <
>> http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-request-fields.html>>
>>
>>
>> > >
>> > > On 12/2/14 12:52 PM, Elias Abou Haydar wrote:
>> > > > I'm trying to write a mapreduce job where I can query
>> elasticsearch so it can return to me specific fields. Is there any
>> > > > way to do that?
>> > > >
>> > > > My mapping contains about 30 fields and I will need just 4
>> of them ("_id","title","description","category")
>> > > >
>> > > > The way I was doing it is to process each answer to get
>> those fields, but I'm looking for a cleaner way to do that.
>> > > >
>> > > > Any help or suggestion is appreciated.
>> > > >
>> > > > Thanks!
>> > > >
>> > > > --
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>> > > >
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>>
>> > <
>> https://groups.google.com/d/msgid/elasticsearch/ac512248-b3fe-4023-b28e-a4263ae720ec%40googlegroups.com>
>>
>>
>> > > <
>> https://groups.google.com/d/msgid/elasticsearch/ac512248-b3fe-4023-b28e-a4263ae720ec%40googlegroups.com
>>
>> > <
>> https://groups.google.com/d/msgid/elasticsearch/ac512248-b3fe-4023-b28e-a4263ae720ec%40googlegroups.com>>
>>
>>
>> > > > <
>> https://groups.google.com/d/msgid/elasticsearch/ac512248-b3fe-4023-b28e-a4263ae720ec%40googlegroups.com?utm_medium=email&utm_source=footer
>>
>> > <
>> https://groups.google.com/d/msgid/elasticsearch/ac512248-b3fe-4023-b28e-a4263ae720ec%40googlegroups.com?utm_medium=email&utm_source=footer>
>>
>>
>> >
>> > > <
>> https://groups.google.com/d/msgid/elasticsearch/ac512248-b3fe-4023-b28e-a4263ae720ec%40googlegroups.com?utm_medium=email&utm_source=footer
>>
>> > <
>> https://groups.google.com/d/msgid/elasticsearch/ac512248-b3fe-4023-b28e-a4263ae720ec%40googlegroups.com?utm_medium=email&utm_source=footer>>>.
>>
>>
>> >
>> > >
>> > > > For more options, visithttps://groups.google.com/d/optout <
>> http://groups.google.com/d/optout> <https://groups.google.com/d/optout
>> > <https://groups.google.com/d/optout>>.
>> > >
>> > > --
>> > > Costin
>> > >
>> > > --
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>> > >
>> https://groups.google.com/d/msgid/elasticsearch/0b096d2b-4dab-443a-b9ca-cd249a0523d8%40googlegroups.com
>>
>> > <
>> https://groups.google.com/d/msgid/elasticsearch/0b096d2b-4dab-443a-b9ca-cd249a0523d8%40googlegroups.com>
>>
>>
>> > > <
>> https://groups.google.com/d/msgid/elasticsearch/0b096d2b-4dab-443a-b9ca-cd249a0523d8%40googlegroups.com?utm_medium=email&utm_source=footer
>>
>> > <
>> https://groups.google.com/d/msgid/elasticsearch/0b096d2b-4dab-443a-b9ca-cd249a0523d8%40googlegroups.com?utm_medium=email&utm_source=footer>>.
>>
>>
>> >
>> > > For more options, visithttps://groups.google.com/d/optout <
>> https://groups.google.com/d/optout>.
>> > --
>> > Costin
>> >
>> > --
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>>
>> > <
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>>
>>
>> > For more options, visit https://groups.google.com/d/optout.
>>
>> --
>> Costin
>>
>>
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