MakeInstance (Apache Jena)

java.lang.Object
- org.apache.jena.reasoner.rulesys.builtins.BaseBuiltin
- - org.apache.jena.reasoner.rulesys.builtins.MakeInstance

All Implemented Interfaces:

Builtin
```
public class MakeInstance
extends BaseBuiltin
```
Create or lookup an anonymous instance of a property value. Syntax of the call is:
```
    makeInstance(X, P, D, T) or makeInstance(X, P, T)
 
```
where X is the instance and P the property for which a temporary value is required, T will be bound to the temp value (a bNode) and D is an optional type cor the T value.

Field Summary
- Fields inherited from class org.apache.jena.reasoner.rulesys.builtins.BaseBuiltin
  BASE_URI

Constructor Summary

Constructors
Constructor Description

MakeInstance()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`bodyCall(Node[] args, int length, RuleContext context)`	This method is invoked when the builtin is called in a rule body.
`java.lang.String`	`getName()`	Return a name for this builtin, normally this will be the name of the functor that will be used to invoke it.

Methods inherited from class org.apache.jena.reasoner.rulesys.builtins.BaseBuiltin
checkArgs, getArg, getArgLength, getURI, headAction, isMonotonic, isSafe

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

- Constructor Detail
  - MakeInstance
```
public MakeInstance()
```
- Method Detail
  - getName
```
public java.lang.String getName()
```
    Return a name for this builtin, normally this will be the name of the functor that will be used to invoke it.
  - bodyCall
```
public boolean bodyCall(Node[] args,
                        int length,
                        RuleContext context)
```
    This method is invoked when the builtin is called in a rule body.
    
    Specified by:
    
    bodyCall in interface Builtin
    
    Overrides:
    
    bodyCall in class BaseBuiltin
    
    Parameters:
    
    args - the array of argument values for the builtin, this is an array of Nodes, some of which may be Node_RuleVariables.
    
    length - the length of the argument list, may be less than the length of the args array for some rule engines
    
    context - an execution context giving access to other relevant data
    
    Returns:
    
    return true if the buildin predicate is deemed to have succeeded in the current environment