All Known Subinterfaces:

AsyncQueryBuilder, QueryBuilder

All Known Implementing Classes:

AsyncQueryBuilderImpl, QueryBuilderImpl
```
public interface QueryComposer<T>
```
Fluent interface for building query conditions. Common functionality between the synchronous and asynchronous QueryBuilders.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`T`	`and(java.lang.String predicate, QueryArg... args)`	Add another condition that must be true of the query results.
`T`	`in(TypedVar variable, java.util.List<java.lang.String> values)`	Constrain a query variable to be one of a set of values.
`T`	`withContextFacts(java.util.List<Fact> facts)`	Add context facts to the query.

Method Detail

and

T and(java.lang.String predicate,
      QueryArg... args)

Add another condition that must be true of the query results. For example:


 // Query for all the repos on which the user can perform read action,
 // and require the repos to belong to a specific folder
 TypedVar repo = new TypedVar("Repo");
 List<String> authorizedReposInFolder = oso
   .buildQuery("allow", new Value("User", "user123"), new Value("read"), repo)
   .and("has_relation", repo, new Value("folder"), new Value("Folder", "folder456"))
   .evaluate(repo);

Parameters:: predicate - The predicate of the condition; args - The arguments to the condition
Returns:: A new QueryBuilder with the added condition

in

T in(TypedVar variable,
     java.util.List<java.lang.String> values)

Constrain a query variable to be one of a set of values. For example:


 TypedVar repo = new TypedVar("Repo");
 TypedVar action = new TypedVar("String");
 // Get all the actions a user can perform on specific repos
 List<String> authorizedActions = oso
   .buildQuery("allow", new Value("User", "user123"), action, repo)
   .in(repo, Arrays.asList("acme", "anvil"))
   .evaluate(action);

Parameters:: variable - The variable to constrain; values - The set of allowed values for the constrained variable
Returns:: A new QueryBuilder with the added constraint
Throws:: java.lang.IllegalArgumentException - if the variable is not used in the query or values have already been set

withContextFacts
```
T withContextFacts(java.util.List<Fact> facts)
```
Add context facts to the query.

Parameters:

facts - The context facts to add

Returns:

A new QueryBuilder with the added context facts

Interface QueryComposer<T>

Method Summary

Method Detail

and

in

withContextFacts