Querying for Resources

In Querying resources you will be working on the "REG_RESOURCE" table. "REG_RESOURCE" table contains the following fields:

• REG_RESOURCE
• REG_PATH_ID
• REG_NAME
• REG_VERSION
• REG_MEDIA_TYPE
• REG_CREATOR
• REG_CREATED_TIME
• REG_LAST_UPDATOR
• REG_LAST_UPDATED_TIME
• REG_DESCRIPTION
• REG_CONTENT_ID

In order to return a resource, you always need to return the "REG_PATH_ID, REG_NAME" in your custom query. This is because ("REG_PATH_ID, REG_NAME") fields act together as an ID for the resource.

For example, the following query will return one or more resources that have a given pattern in the description:

SELECT REG_PATH_ID, REG_NAME FROM REG_RESOURCE WHERE REG_DESCRIPTION LIKE?

The following example shows a code snippet that does a custom query.

1. Put a resource with the content as the query.

String sql1 = "SELECT REG_PATH_ID, REG_NAME FROM REG_RESOURCE WHERE REG_DESCRIPTION LIKE ?";

Resource q1 = registry.newResource();

q1.setContent(sql1);

q1.setMediaType(RegistryConstants.SQL_QUERY_MEDIA_TYPE);

q1.addProperty(RegistryConstants.RESULT_TYPE_PROPERTY_NAME,

RegistryConstants.RESOURCES_RESULT_TYPE);

registry.put(RegistryConstants.CONFIG_REGISTRY_BASE_PATH + RegistryConstants.QUERIES_COLLECTION_PATH + "/custom-queries", q1);

2. Give the parameters and the query location you have just putted.

Map parameters = new HashMap();

parameters.put("1", "%service%");

Resource result = registry.executeQuery(RegistryConstants.CONFIG_REGISTRY_BASE_PATH + RegistryConstants.QUERIES_COLLECTION_PATH + "/custom-queries", parameters);

String[] paths = (String[])result.getContent();

For more information about Queries see Custom Query.

For further information about Querying Resources refer following topics:

• Querying for Resources By Properties
• Querying for Resources By Tag