EnvironmentFrame (Apache Jena)

java.lang.Object
- org.apache.jena.reasoner.rulesys.impl.FrameObject
- - org.apache.jena.reasoner.rulesys.impl.EnvironmentFrame

Direct Known Subclasses:

EnvironmentFrameWithDerivation
```
public class EnvironmentFrame
extends FrameObject
```
Represents a single frame in the LP interpreter's environment stack. The environment stack represents the AND part of the search tree - it is a sequence of nested predicate calls.
This is used in the inner loop of the interpreter and so is a pure data structure not an abstract data type and assumes privileged access to the interpreter state.

Constructor Summary

Constructors
Constructor Description

EnvironmentFrame(RuleClauseCode clause)
Constructor

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`allocate(int n)`	Allocate a vector of permanent variables for use in the rule execution.
`Rule`	`getRule()`	Return the rule associated with this environment, null if no such rule.
`java.lang.String`	`toString()`	Printable string for debugging.

Methods inherited from class org.apache.jena.reasoner.rulesys.impl.FrameObject
close, fastLinkTo, getLink, linkTo

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

- Constructor Detail
  - EnvironmentFrame
```
public EnvironmentFrame(RuleClauseCode clause)
```
    Constructor
    
    Parameters:
    
    clause - the compiled code being interpreted by this env frame
- Method Detail
  - allocate
```
public void allocate(int n)
```
    Allocate a vector of permanent variables for use in the rule execution.
  - getRule
```
public Rule getRule()
```
    Return the rule associated with this environment, null if no such rule.
  - toString
```
public java.lang.String toString()
```
    Printable string for debugging.
    
    Overrides:
    
    toString in class java.lang.Object