Query (MG4J (big) 5.4.4)

All Superinterfaces:

Serializable

All Known Implementing Classes:

Align, And, Annotation, Composite, Consecutive, Containment, Difference, False, Inclusion, LowPass, MultiTerm, Not, Or, OrderedAnd, Prefix, Range, Remap, Select, Term, True, Weight
```
public interface Query
extends Serializable
```
A node of a composite representing a query.
A query is abstractly represented by a composite made of implementations of this interface. The syntax can be different from parser to parser, but the result of the parsing process is an instance of this class.
Queries support building visits: invoking accept(QueryBuilderVisitor) on a suitable QueryBuilderVisitor will return an object that has been built by the visitor.
To this purpose, the implementation of accept(QueryBuilderVisitor) on internal nodes must gather in an array (or in an element) the results returned by the recursive calls to accept(QueryBuilderVisitor) on subnodes and pass the array (or the element) to the suitable visitPost() method of QueryBuilderVisitor.
Since allocating a generic array is impossible, every visitor must provide an explicit QueryBuilderVisitor.newArray(int) method which returns an array of the correct type.

Author:

Sebastiano Vigna

See Also:

Query

- Method Summary
  
  Modifier and Type Method Description
  
  <T> T accept(QueryBuilderVisitor<T> visitor)
  Accepts a visitor.

- Method Detail
  - accept
```
<T> T accept(QueryBuilderVisitor<T> visitor)
      throws QueryBuilderVisitorException
```
    Accepts a visitor.
    
    Parameters:
    
    visitor - the visitor.
    
    Returns:
    
    the result of the visit, or null if the visit should stop.
    
    Throws:
    
    QueryBuilderVisitorException
    
    See Also:
    
    Query