RegistryQuery (Starjava VO API)

All Known Implementing Classes:

RegTapRegistryQuery, Ri1RegistryQuery
```
public interface RegistryQuery
```
Describes a query on a registry.

Since:

4 Jan 2005

Author:

Mark Taylor (Starlink)

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`uk.ac.starlink.table.DescribedValue[]`	`getMetadata()`	Returns a set of DescribedValue objects which characterise this query.
`java.util.Iterator<RegResource>`	`getQueryIterator()`	Executes the query described by this object and returns an Iterator over `RegResource` objects.
`RegResource[]`	`getQueryResources()`	Executes the query described by this object and returns the result as an array of `RegResource`s.
`java.net.URL`	`getRegistry()`	Returns the registry URL.
`java.lang.String`	`getText()`	Returns the query text.

- Method Detail
  - getQueryIterator
```
java.util.Iterator<RegResource> getQueryIterator()
                                          throws java.io.IOException
```
    Executes the query described by this object and returns an Iterator over RegResource objects. Note that the iterator's next method may throw the unchecked exception RegistryQueryException with a cause indicating the underlying error in case of a registry access problem.
    
    Returns:
    
    iterator over RegResources
    
    Throws:
    
    java.io.IOException
  - getQueryResources
```
RegResource[] getQueryResources()
                         throws java.io.IOException
```
    Executes the query described by this object and returns the result as an array of RegResources.
    
    Returns:
    
    resource list
    
    Throws:
    
    java.io.IOException
  - getText
```
java.lang.String getText()
```
    Returns the query text.
    
    Returns:
    
    query
  - getRegistry
```
java.net.URL getRegistry()
```
    Returns the registry URL.
    
    Returns:
    
    url
  - getMetadata
```
uk.ac.starlink.table.DescribedValue[] getMetadata()
```
    Returns a set of DescribedValue objects which characterise this query. These would be suitable for use in the parameter list of a StarTable resulting from the execution of this query.