PrefixDeclProcessor (RDF4J: Query parser - SPARQL 5.0.0-M2 API)

java.lang.Object
- org.eclipse.rdf4j.query.parser.sparql.PrefixDeclProcessor

```
@InternalUseOnly
public class PrefixDeclProcessor
extends Object
```
Processes the prefix declarations in a SPARQL query model.

Author:

Arjohn Kampman

Constructor Summary

Constructors
Constructor Description

PrefixDeclProcessor()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static Map<String,String>`	`process(ASTOperationContainer qc, Map<String,String> customDefaultPrefixes)`	Processes prefix declarations in queries.

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

- Constructor Detail
  - PrefixDeclProcessor
```
public PrefixDeclProcessor()
```
- Method Detail
  - process
```
public static Map<String,String> process(ASTOperationContainer qc,
                                               Map<String,String> customDefaultPrefixes)
                                        throws MalformedQueryException
```
    Processes prefix declarations in queries. This method collects all prefixes that are declared in the supplied query, verifies that prefixes are not redefined and replaces any ASTQName nodes in the query with equivalent ASTIRI nodes.
    
    Parameters:
    
    qc - The query that needs to be processed.
    
    customDefaultPrefixes - Custom prefixes to add, will override SPARQL default prefixes. can't be null.
    
    Returns:
    
    A map containing the prefixes that are declared in the query (key) and the namespace they map to (value).
    
    Throws:
    
    MalformedQueryException - If the query contains redefined prefixes or qnames that use undefined prefixes.