[jira] [Created] (GORA-121) Enhance CassandraMapping to support additional Column Definitions

["Lewis John McGibbney (Created) (JIRA)" <ji...@apache.org>]

Enhance CassandraMapping to support additional Column Definitions 
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                 Key: GORA-121
                 URL: https://issues.apache.org/jira/browse/GORA-121
             Project: Apache Gora
          Issue Type: New Feature
          Components: storage-cassandra
    Affects Versions: 0.2
            Reporter: Lewis John McGibbney
            Assignee: Lewis John McGibbney
             Fix For: 0.3


There are 2 parts to this issue

1) CassandraMapping#loadConfiguration currently loads definitions for keyspaces, column families and columns however the support for the latter is limited.
The following is a mapping example

Say we have the keyspace mapping configuration:
    <keyspace name="WebPage" cluster="Test Cluster" host="localhost">
        <family name="p"/>
        <family name="f"/>
   	<family name="sc" type="super"/>
    </keyspace>

and the column mapping configuration:
   <class name="org.apache.gora.examples.generated.WebPage" keyClass="java.lang.String" keyspace="WebPage">
    <field name="url" family="p" path="c:u"/>
    <field name="content" family="p" path="p:cnt:c"/>
    <field name="parsedContent" family="p" path="p:parsedContent"/>
    <field name="outlinks" family="p" path="p:outlinks"/>
    <field name="metadata" family="p" path="c:mt"/>
   </class>

Currently we don't support keyClass attributes or field path attributes.

2) Additionally, we mention

private static final String COLUMN_ATTRIBUTE = "qualifier";

however this resource is neither loaded or requested at any stage during the process of ascertaining Cassandra mappings. This should also be supported, if not then it should be removed.

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