QuerySource (omero-server 5.5.3 API)

java.lang.Object
- ome.services.query.QuerySource

Direct Known Subclasses:

ClassQuerySource, NullQuerySource, StringQuerySource
```
public abstract class QuerySource
extends java.lang.Object
```
contract for any source of queries. Instances should be registered with the QueryFactory in the Spring configuration. QuerySources are responsible for mapping the given query ID to a Query instance (possibly dependent on the Parameters). The order of sources provided to QueryFactory is very important. QuerySources can use any mechanism available to perform the lookup, e.g. a database backend, flat-files, the set of Hibernate named-queries, or concrete classes (see ClassQuerySource).

Since:

OMERO 3.0

Constructor Summary

Constructors
Constructor Description

QuerySource()

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`abstract <T> Query<T>`	`lookup(java.lang.String queryID, ome.parameters.Parameters parameters)`	map the queryID argument to some Query instance (including null).

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - QuerySource
```
public QuerySource()
```
- Method Detail
  - lookup
```
public abstract <T> Query<T> lookup(java.lang.String queryID,
                                    ome.parameters.Parameters parameters)
```
    map the queryID argument to some Query instance (including null). This mapping can be dependent on the provided Parameters
    
    Type Parameters:
    
    T - the generic type of the return Query. This is usually provided indirectly through the type assignment, e.g. "Query q = ... "
    
    Parameters:
    
    queryID - abstract identifier for the sought query.
    
    parameters - named parameters for lookup and actual bindings.
    
    Returns:
    
    A possible null Query for later execution.